(19)
(11)EP 2 189 050 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
11.07.2012 Bulletin 2012/28

(21)Application number: 08828131.6

(22)Date of filing:  22.08.2008
(51)Int. Cl.: 
H05K 5/02  (2006.01)
(86)International application number:
PCT/US2008/074054
(87)International publication number:
WO 2009/029530 (05.03.2009 Gazette  2009/10)

(54)

ELECTRONIC DEVICE AND ELECTROMAGNETIC SHIELD AND METHOD OF FORMING SAME

ELEKTRONISCHE VORRICHTUNG UND ELEKTROMAGNETISCHE ABSCHIRMUNG SOWIE HERSTELLUNGSVERFAHREN DAFÜR

DISPOSITIF ÉLECTRONIQUE, PROTECTION ÉLECTROMAGNÉTIQUE ET SON PROCÉDÉ DE FORMATION


(84)Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

(30)Priority: 24.08.2007 US 844995
24.08.2007 US 844997

(43)Date of publication of application:
26.05.2010 Bulletin 2010/21

(73)Proprietor: Novatel Wireless, Inc
San Diego, CA 92121 (US)

(72)Inventors:
  • BREWER, Alberto
    Chula Vista, California 91914 (US)
  • WILBER, Clint
    San Diego, California 92111 (US)
  • CONKLIN, Todd
    San Diego, California 92117 (US)
  • HERTLEIN, Robert
    San Diego, California 92129 (US)

(74)Representative: Winter, Brandl, Fürniss, Hübner, Röss, Kaiser, Polte - Partnerschaft 
Bavariaring 10
80336 München
80336 München (DE)


(56)References cited: : 
EP-A1- 0 394 053
US-A- 4 717 989
US-A- 6 121 545
US-B1- 6 392 900
US-B2- 7 247 032
EP-A1- 1 248 507
US-A- 6 121 545
US-A1- 2004 014 336
US-B1- 7 155 258
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    BACKGROUND OF THE INVENTION



    [0001] The present invention relates generally to the field of electronic devices and, more particularly, to the field of electronic devices with printed circuit boards that generate heat.

    [0002] There is a general desire to reduce the size or footprint of electronic devices, such as wireless modems. The extent to which the size of such devices may be reduced is limited by several factors. For example, such devices typically include electronic components which generate heat. Reduction in size generally impacts the ability of the device to dissipate the generated heat. Further, in order to avoid interference, particularly electromagnetic interference, the electronic components in such devices must be maintained at a certain distance from other components. Thus, the extent to which the size of such devices may be reduced is further limited.
    US4717989 describes a module which includes a thermally and electrically conductive module base which is preferably cast from ZAMAK #3 ASTM AG40A. The large mass of the module base provides heat dissipation, and the module base and a cover plate provide an electromagnetic shield between a main board module components.
    EP0394053 describes a miniature radio communication equipment with shield structure which has transmitter and receiver sections mounted on separate. circuit boards arranged so that ground patterns act as electromagnetic screen.

    [0003] One aspect of the invention relates to an electronic device as defined in claim 1. The electronic device includes a first printed circuit board including electronic components, a second printed circuit board including electronic components, and a shielding midframe. The shielding midframe is adapted to provide electromagnetic isolation between the first printed circuit board and the second printed circuit board. The shielding midframe is further adapted to provide electromagnetic isolation of electronic components on at least one of the first printed circuit or the second printed circuit. The electronic device further includes a housing adapted to secure therewithin the first and second printed circuit boards and the shielding midframe. The housing is formed of an extruded plastic and an amorphous alloy.

    [0004] In one embodiment, the first and second printed circuit boards are stacked with the shielding midframe positioned therebetween.

    [0005] The shielding midframe may be adapted to provide distribution or dissipation of heat generated by at least one electronic component.

    [0006] In one embodiment, the shielding midframe includes a first side with at least one cavity to accommodate electronic components of the first printed circuit board and a second side with at least one cavity to accommodate electronic components of the second printed circuit board. Each cavity may be electromagnetically isolated from each other cavity.

    [0007] The housing may include a metal insert for transfer of heat from the printed circuit board.

    [0008] In one embodiment, the electronic device further includes a heat spreader positioned between at least one of the printed circuit boards and the housing. The heat spreader may be adapted to distribute heat from the printed circuit board to the housing.

    [0009] In one embodiment, the electronic device further includes a heat transfer unit adapted to transfer heat between the first printed circuit board and the second printed circuit board. The heat transfer unit may be a screw adapted to secure the first printed circuit board and the second printed circuit board to the shielding midframe.

    [0010] In one embodiment, at least one component of the first circuit board is coupled to at least one component of the second circuit board.

    [0011] In one embodiment, the electronic device further includes at least one snap-on antenna and a diversity antenna to provide wireless communication by at least one of the printed circuit boards.

    [0012] The shielding midframe may be formed of a metal. In one embodiment, the shielding midframe is formed of an amorphous alloy.

    [0013] The shielding midframe may also provide structural rigidity.

    [0014] In one embodiment, the electronic device further includes a connector adapted to provide interfacing of at least one of the printed circuit boards with a communication device. The connector may be a universal serial bus (USB) connector. At least one of the printed circuit boards may provide modem capabilities for the communication device.

    [0015] In another aspect of the invention, a method for forming an electronic device includes positioning a shielding midframe to provide electromagnetic isolation between a first printed circuit board and a second printed circuit board. The first printed circuit board includes electronic components, and the second printed circuit board includes electronic components. The shielding midframe is further adapted to provide electromagnetic isolation of electronic components on at least one of the first printed circuit or the second printed circuit.. The electronic device further includes a housing adapted to secure therewithin the first and second printed circuit boards and the shielding midframe. The housing is formed of an extruded plastic and an amorphous alloy.

    [0016] The device may be a modem device. The modem device includes a first printed circuit board including electronic components, a second printed circuit board including electronic components, an antenna positioned on the first printed circuit board or the second printed circuit board, and a shielding midframe. The shielding midframe is adapted to provide electromagnetic isolation between the first printed circuit board and the second printed circuit board, the shielding midframe being further adapted to provide electromagnetic isolation of electronic components on at least one of the first printed circuit or the second printed circuit.

    [0017] An electronic shielding component includes a shielding body, at least one cavity on a first side of the shielding body, the at least one cavity adapted to accommodate an electronic component therein, and at least two cavities on a second side of the shielding body, each of the at least two cavities adapted to accommodate an electronic component therein. Each cavity is adapted to electromagnetically isolate an electronic component therein from cavities on an opposite side of the shielding body and from cavities on the same side of the shielding body.

    [0018] In one embodiment, the shielding body is adapted to be positioned between a first printed circuit board containing electronic components and a second printed circuit board containing electronic components, wherein the first and second printed circuit boards s are stacked.

    [0019] The shielding body may be adapted to provide distribution or dissipation of heat generated by at least one electronic component.

    [0020] In one embodiment, the electronic shielding component further includes a through hole adapted to receive a heat transfer unit therein. The heat transfer unit is adapted to transfer heat between the first side and the second side. The heat transfer unit may be a screw adapted to secure electronic components to the shielding body.

    [0021] The shielding body may include a contour to allow at least one component in a cavity on the first side of the shielding body to be coupled to at least one component in a cavity on the second side of the shielding body.

    [0022] In one embodiment, the shielding body is formed of a metal. The shielding body may be formed of an amorphous alloy.

    [0023] In one embodiment, the shielding body provides structural rigidity.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0024] Figures 1A and 1B are perspective illustrations of an electronic device according to an embodiment of the present invention;

    [0025] Figure 2 is an exploded illustration of the electronic device of Figures 1A and 1B;

    [0026] Figures 3A-3F illustrate the assembly of the electronic device according to an embodiment of the present invention;

    [0027] Figures 4A-4G illustrate various views of the electronic device according to an embodiment of the present invention;

    [0028] Figure 5A illustrates an isometric view of the top of a shielding midframe for use with an electronic device according to an embodiment of the present invention;

    [0029] Figure 5B illustrates an isometric view of the bottom of the shielding midframe of Figure 5A;

    [0030] Figures 6A-6D illustrate various views of the shielding midframe of Figures 5A and 5B; and

    [0031] Figure 7 illustrates an isometric view of the shielding midframe with a conductive sealant according to an embodiment of the present invention.

    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS



    [0032] Referring to Figures 1A and 1B, an electronic device according to an embodiment of the present invention is illustrated. The electronic device 100 may be any type of electronic device with electronic components therein. In the illustrated embodiment, the electronic device 100 is a modem device adapted to provide wireless communication.

    [0033] The electronic device 100 includes a main body 120 and a cap 110. Figure 1A illustrates the electronic device 100 in the closed position with the cap covering an end of the main body, while Figure 1B illustrates the electronic device 100 in an open position with an end of the main body 120 exposed. The main body 120 includes various electronic components (described below), as well as a connector for coupling the electronic device 100 with another device, such as a communication device. The communication device may be, for example, a desktop computer, a laptop computer, a portable phone, a personal digital assistant (PDA) or the like.

    [0034] Referring now to Figure 2, an exploded illustration of the electronic device 100 is provided. The electronic device 100, such as the illustrated wireless modem device, is advantageously configured to have a reduced size. In the illustrated embodiment, the reduced size is achieved by positioning the electronic components a first printed circuit board (PCB) 1 and on a second PCB 2 and positioning the two PCB's 1, 2 in a stacked configuration. The embodiment illustrated in the figures includes two stacked PCB's. Those with skill in the art will understand that any practical number of PCB's may be stacked. Further, in addition to be stacked, the PCB's may be positioned in various other configurations to reduce the size or footprint of the electronic device 100. Such variations are contemplated within the scope of the present invention.

    [0035] The electronic components on the PCB's 1, 2 may include all components necessary for electronic operation of the electronic device 100. For example, the first PCB 1 may include a power module and one or more antennas 16. The antennas 16 may include a snap-on antenna and a diversity antenna.

    [0036] Similarly, the second PCB 2 may include various components such as a processor configured for operation of the electronic device 100. In the illustrated embodiment, the second PCB 2 is provided with a connector 15 for interfacing the electronic device 100 with another communication device (not shown). In this regard, when interfaced with another communication device, the electronic device 100 provides wireless communication capability to allow the communication device to communicate with, for example, a network such as a wireless local area network (WLAN), a cellular network or another device. In the illustrated embodiment, the connector 15 is a universal serial bus (USB) connector.

    [0037] To prevent or reduce interference between the electronic components on the two PCB's 1, 2, a shielding midframe 10 is positioned between the first PCB 1 and the second PCB 2. The shielding midframe is adapted to provide electromagnetic isolation between the electronic components on the first PCB 1 and those on the second PCB 2. Further, the shielding midframe 10 is adapted to provide electromagnetic isolation of electronic components on the same PCB. For example, the shielding midframe 10 is adapted to provide electromagnetic isolation of one electronic component on the first PCB 1 from another electronic component on the first PCB 1. An embodiment of the shielding midframe 10 is described below in greater detail with reference to Figures 5A-7.

    [0038] For operation of the electronic device 100, communication may be required between the different PCB's 1, 2. In this regard, the first PCB 1 and the second PCB 2 are provided with connectors 14a, 14b adapted to engage each other. The connectors 14a, 14b may be male and female counterparts of pin connector arrangement, for example. To allow engagement of the connectors 14a, 14b, the shielding midframe 10 may be provided with a contour 10a. Thus, the connectors 14a, 14b engage each other through the contour 10a of the shielding midframe 10. Further, additional openings may be provided within the shielding midframe 10 for electronic coupling of the first and second PCB's 1, 2, while maintaining electromagnetic isolation of the various components. Thus, at least one electronic component of the first PCB 1 is coupled to at least one electronic component of the second PCB 2.

    [0039] During operation of the electronic device 100, one or more electronic components of the electronic device 100 may generate heat. The heat may be generated either continuously or in short bursts, as may occur when a modem is transmitting or receiving signals. Over time, this heat may cause the temperature within the electronic device 100 to increase to a level which may damage or disrupt operation of one or more electronic components.

    [0040] In this regard, the shielding midframe 10 may be adapted to facilitate dissipation or distribution of heat. For example, the shielding midframe 10 may absorb at least some of the heat for dissipation over time. Thus, when heat is generated in short bursts, the shielding midframe 10 may absorb the heat during these short periods of operation. The shielding midframe may then dissipate the heat outside these periods.

    [0041] Further, the shielding midframe 10 may direct, or distribute, the heat to various other portions of the electronic device 100 for dissipation to the external environment. In this regard, the shielding midframe 10 may serve as a conduit for heat from the electronic components to, for example, housing components 4, 5 of the electronic device 100.

    [0042] The housing components 4, 5 are provided to secure the first PCB 1, the second PCB 2, the shielding midframe 10 and other components of the electronic device 100 secured within the housing components 4, 5.

    [0043] In addition, the housing components 4, 5 may include components for facilitating dissipation of heat. In one embodiment, the housing components 4, 5 are formed of an extruded plastic material and may be formed in a mold, for example. Additionally, a metal insert may be provided in the housing lower housing component 5. The metal insert may be formed of a variety of materials. In one embodiment, the metal insert is formed of an amorphous alloy, such as Liquidmetal®. In this regard, the metal insert may be formed using a mold, resulting in reduced manufacturing costs by eliminating the need for machining.

    [0044] Thus, heat may be distributed from the electronic components by the shielding midframe 10 to the housing component 5. The metal insert of the housing component 5 may then allow for dissipation of the heat to the external environment.

    [0045] In certain embodiments, various electronic components of the PCB's 1, 2 may also require electromagnetic isolation from the outside environment. For example, in the illustrated embodiment, electronic components on the first PCB1 may require electromagnetic isolation from the outside environment. To facilitate such isolation, shielding lids 11, 12 are provided on the opposite side of the first PCB 1 from the shielding midframe 10. The shielding lids 11, 12 may be made of the same or different materials as the shielding midframe 10.

    [0046] In the illustrated embodiment, the electronic device 100 includes a fastener 8, such as a screw, to secure the first PCB 1, the second PCB 2 and the shielding midframe 10 to each other. The fastener 8 may also secure the PCB's 1, 2 and the shielding midframe 10 to the lower housing component 5. The fastener 8 is preferably made of a metal material. In this regard, the fastener 8 may also function as a heat transfer unit for transferring heat between the first PCB 1, the second PCB 2 and the shielding midframe 10.

    [0047] A heat spreader 9 is provided between the first PCB 1, with the shielding lids 11, 12, and the upper housing component 4. The heat spreader 9 functions to distribute heat from the PCB's 1, 2 substantially across the entire surface of the upper housing component 4. In this regard, additional heat is dissipated through the surface of the upper housing component 4. Further, excess heat from the second PCB 2, may be transferred through the fastener 8 to the heat spreader 9 for dissipation through the upper housing component 4. Thus, the fastener 8 functions as a heat transfer unit for transferring heat from the PCB's 1, 2 and the shielding midframe 10 to an outside surface, such as the housing component 4. The heat spreader 9 may be shaped as desired to make contact with certain regions and avoid contact with other regions of the PCB, for example.

    [0048] The electronic device 100 may also include labels 7, 13 to cover various openings in the housing components 4, 5, as described in greater detail below with reference to Figures 4A-4G.

    [0049] Referring now to Figures 3A-3F, the assembly of the electronic device according to an embodiment of the present invention is illustrated. Referring first to Figure 3A, the shielding midframe 10 is positioned to provide electromagnetic isolation between the first PCB 1 and the second PCB 2. As noted above, the shielding midframe 10 may also provide electromagnetic isolation of electronic components on the same PCB. The PCB's 1, 2 and the midframe are secured, in part, by engagement of the connectors 14a, 14b of the PCB's 1, 2. As noted above, the connectors 14a, 14b engage each other through contour 10a of the shielding midframe 10.

    [0050] Next, as illustrated in Figure 3B, the shielding lids 11, 12 may be positioned above the various electronic components of the first PCB 1. The shielding lids 11, 12 provide electromagnetic shielding for the electronic components from the outside environment.

    [0051] Referring now to Figure 3C, the PCB's 1, 2 and the shielding midframe 10 are secured to each other and the lower housing component 5 by the fastener 8. Next, the hat spreader 9 is positioned (see Figure 3D), and the upper housing component 4 is secured to the lower housing component 5. The housing components 4, 5 may be secured to each other in a variety of manners, including by way of notches and corresponding slots formed on the housing components 4, 5. Finally, following any necessary testing or configuration of the electronic device, labels 7, 13 are placed to cover holes in the housing. The holes are described below in greater detail with reference to Figures 4A-4G.

    [0052] Referring now to Figures 4A-4G, various views of the electronic device 100 according to an embodiment of the present invention are illustrated. Figure 4A illustrates a top view of the electronic device 100 with the cap 110 removed. Additionally, the label 7 is not shown to illustrate the hole 42 in the upper housing component 4. The hole 42 is provided for testing of the electronic device 100. In the case of a wireless modem, the hole provides for connection of an antenna test box to facilitate testing of the electronic device 100.

    [0053] Referring now to Figure 4D, a view of the bottom of the electronic device 100 with the cap 110 removed is illustrated. Again, the label 13 is not shown to illustrate the openings in the lower housing component 5. Figure 4G shows the region of the opening in greater detail. The lower housing component 5 is provided with two sets of openings. The first set of opening 52 provide ventilation of the electronic device 100. In this regard, the ventilation may be passive. Additionally, a second set of openings 54 is provided to facilitate configuration (or reconfiguration) of the electronic device. For example, the set of openings 54 may be opening for Joint Test Action Group (JTAG) pins. The set of openings 54 may allow for configuration of the modem device for specific uses, for example.

    [0054] Referring now to Figure 5A-6D, various views of the shielding midframe 10 according to an embodiment of the present invention are illustrated. Figure 5A is an isometric view of the top of the shielding midframe 10 illustrating a first side 60 of the shielding midframe 10, while Figure 5B is an isometric view of the bottom of the shielding midframe 10 illustrating a second side 70 of the shielding midframe 10. The first side 60 is provided with a plurality of cavities 62, 64, 66 for accommodating electronic components therein. The electronic components housed in the cavities 62, 64, 66 are electromagnetically isolated from any components on the second side 70 of the shielding midframe 10. Similarly, the second side 70 is provided with a cavity to accommodate electronic components therein. Although only the first side 60 of the illustrated embodiment is provided with multiple cavities 62, 64, 66, it is contemplated that each side 60, 70 may be provided with multiple cavities.

    [0055] Each of the first side 60 and the second side 70 is provided with an outer wall 61, 71, respectively, to facilitate shielding of the electronic components. Additionally, the first side 60 is provided with internal walls 63, 65 to provide electromagnetic isolation of the components in adjacent cavities 62, 64, 66. Thus, electronic components on the same PCB (on the same side of the shielding midframe 10) are electromagnetically isolated from each other.

    [0056] As noted above, the shielding midframe 10 is provided with a contour 10a to facilitate any desired coupling of components or PCB's on opposite sides of the shielding midframe 10. Further coupling may be achieved through openings, such as opening 67, in the interior of the shielding midframe 10. Also, a through hole 69 is provided for the fastener described above for fastening of the PCB's and the midframe to each other and/or to the housing component.

    [0057] The shielding midframe 10 may be formed of any of a number of materials, such as metals. In one embodiment, the shielding midframe is formed of an amorphous alloy, such as Liquidmetal®. In this regard, a mold may be used to repeatedly form the shielding midframe to high tolerances. Thus, the use of amorphous alloys allows for the formation of a shielding midframe to high tolerances without the need for costly and time-consuming machining of metal.

    [0058] In addition to the electromagnetic isolation and the heat dissipation/distribution, the shielding midframe 10 may also provide desired rigidity to the electronic device. Such devices are often used by plugging into other devices and can remain vulnerable and fragile. The use of the midframe with the stacked configuration of the PCB's provides for a more stable and rigid structure.

    [0059] Referring now to Figure 7, an isometric view of the shielding midframe 10 is illustrated with a conductive sealant provided on the edge of the walls 61, 63, 65. Similar conductive sealant may be formed on the wall 71 on the second side of the shielding midframe. In one embodiment, the conductive sealant is conductive silicone. Use of the conductive sealant can prevent current leakage from the electronic components of the PCB's. Such leakage may occur with repeated heating and cooling of the electronic device. Since the shielding midframe 10 and the PCB's may not expand and contract at the same rates during such heating and cooling periods, a separation between them may occur. The conductive sealant can seal any such separation.

    [0060] The foregoing description of embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the present invention to the precise form disclosed, and modifications and variations are possible in light of the above teachings or may be acquired from practice of the present invention. The embodiments were chosen and described in order to explain the principles of the present invention and its practical application to enable one skilled in the art to utilize the present invention in various embodiments and with various modifications as are suited to the particular use contemplated.


    Claims

    1. An electronic device, comprising
    a first printed circuit board (1) including electronic components;
    a second printed circuit board (2) including electronic components; and
    a shielding midframe (10) adapted to provide electromagnetic isolation between the first printed circuit board (1) and the second printed circuit board (2), the shielding midframe (10) being further adapted to provide electromagnetic isolation of electronic components on at least one of the first printed circuit board (1) or the second printed circuit board (2),
    further comprising:

    a housing (4, 5) adapted to secure therewithin the first and second printed circuit boards (1, 2) and the shielding midframe (10), characterized in that the housing (4, 5) is formed of an extruded plastic and an amorphous alloy.


     
    2. The electronic device of claim 1, wherein the first and second printed circuit boards (1, 2) are stacked with the shielding midframe (10) positioned therebetween.
     
    3. The electronic device of claim 1 or 2, wherein the shielding midframe (10) is adapted to provide distribution of heat generated by at least one electronic component.
     
    4. The electronic device of claim 1 or 2, wherein the shielding midframe (10) is adapted to provide dissipation of heat generated by at least one electronic component.
     
    5. The electronic device of anyone of claims 1 to 4, wherein the shielding midframe (10) includes a first side (60) with at least one cavity (62, 64, 66) to accommodate electronic components of the first printed circuit board (1) and a second side (70) with at least one cavity to accommodate electronic components of the second printed circuit board (2), wherein each cavity is, optionally,
    electromagnetically isolated from each other cavity.
     
    6. The electronic device of anyone of claims 1 to 5,
    wherein the housing (4, 5) includes a metal insert for transfer of heat from the printed circuit board.
     
    7. The electronic device of claim 6, further comprising:

    a heat spreader (9) positioned between at least one of the printed circuit boards (1, 2) and the housing (4, 5), the heat spreader (9) being adapted to distribute heat from the printed circuit board (1, 2) to the housing (4, 5).


     
    8. The electronic device of anyone of claims 1 to 7, further comprising:

    a heat transfer unit (8) adapted to transfer heat between the first printed circuit board (1) and the second printed circuit board (2).


     
    9. The electronic device of claim 8, wherein the heat transfer unit (8) is a screw adapted to secure the first printed circuit board (1) and the second printed circuit board (2) to the shielding midframe (10),
    wherein the screw optionally is adapted to secure the first printed circuit board (1), the second printed circuit board (2) and the shielding midframe (10) to a housing (4, 5) for the electronic device (100).
     
    10. The electronic device of claims 8 or 9, wherein the heat transfer unit (8) is adapted to transfer heat from the shielding midframe (10) and one or more printed circuit boards (1, 2) to an outside environment.
     
    11. The electronic device of anyone of claims 1 to 10, wherein at least one component of the first circuit board (1) is coupled to at least one component of the second circuit board (2).
     
    12. The electronic device of anyone of claims 1 to 11, further comprising:

    at least one snap-on antenna and a diversity antenna to provide wireless communication by at least one of the printed circuit boards (1, 2).


     
    13. The electronic device of anyone of claims 1 to 12, wherein the shielding midframe (10) is formed of a metal, or an amorphous alloy,
    wherein the shielding midframe (10) optionally provides structural rigidity.
     
    14. The electronic device of anyone of claims 1 to 13, further comprising:

    a connector adapted to provide interfacing of at least one of the printed circuit boards (1, 2) with a communication device, wherein the connector optionally is a universal serial bus (USB) connector.


     
    15. The electronic device of anyone of claims 1 to 14, wherein at least one of the printed circuit boards (1, 2) provides modem capabilities for the communication device.
     
    16. The electronic device of anyone of claims 1 to 15, further comprising:

    a conductive sealant adapted to provide to prevent current leakage between the shielding midframe (10) and at least one of the printed circuit boards (1, 2).


     
    17. A method for forming an electronic device, according to anyone of claims 1 to 16 comprising:

    positioning a shielding midframe (10) to provide electromagnetic isolation between a first printed circuit board (1) and a second printed circuit board (2),

    providing a housing (4, 5) adapted to secure therewithin the first and second printed circuit boards (1, 2) and the shielding midframe (10), and

    forming the housing (4, 5) of an extruded plastic and an amorphous alloy.


     


    Ansprüche

    1. Elektronische Einrichtung mit:

    einer ersten Leiterplatine (1), die elektronische Komponenten aufweist;

    einer zweiten Leiterplatine (2), die elektronische Komponenten aufweist; und

    einem abschirmenden Zwischenrahmen (10), der eingerichtet ist zum Bereitstellen elektromagnetischer Isolation zwischen der ersten Leiterplatine (1) und der zweiten Leiterplatine (2), wobei der abschirmende Zwischenrahmen (10) außerdem eingerichtet ist zum Bereitstellen elektromagnetischer Isolation für elektronische Komponenten auf zumindest einer von der ersten Leiterplatine (1) oder der zweiten Leiterplatine (2), und

    außerdem mit:

    einem Gehäuse (4, 5), das eingerichtet ist zum darin Sichern der ersten und der zweiten Leiterplatine (1, 2) und des abschirmenden Zwischenrahmens (10), dadurch gekennzeichnet, dass das Gehäuse (4, 5) mit einem extrudierten Kunststoff und einer amorphen Legierung geformt ist.


     
    2. Elektronische Einrichtung gemäß Anspruch 1, wobei die erste und die zweite Leiterplatine (1, 2) mit dem abschirmenden Zwischenrahmen (10) dazwischen positioniert gestapelt sind.
     
    3. Elektronische Einrichtung gemäß Anspruch 1 oder 2, wobei der abschirmende Zwischenrahmen (10) angepasst ist zum Realisieren einer Verteilung von durch wenigstens eine elektronische Komponente erzeugter Wärme.
     
    4. Elektronische Einrichtung gemäß Anspruch 1 oder 2, wobei der abschirmende Zwischenrahmen (10) angepasst ist zum Realisieren einer Ableitung von durch wenigstens eine elektronische Komponente erzeugter Wärme.
     
    5. Elektronische Einrichtung gemäß einem der Ansprüche 1 bis 4, wobei der abschirmende Zwischenrahmen (10) eine erste Seite (60) mit wenigstens einer Vertiefung (62, 64, 66) zum Aufnehmen elektronischer Komponenten der ersten Leiterplatine (1) und eine zweite Seite (70) mit wenigstens einer Vertiefung zum Aufnehmen elektronischer Komponenten der zweiten Leiterplatine (2) aufweist, wobei jede Vertiefung optional elektromagnetisch von jeder anderen Vertiefung isoliert ist.
     
    6. Elektronische Einrichtung gemäß einem der Ansprüche 1 bis 5, wobei das Gehäuse (4, 5) einen Metalleinsatz aufweist zum Übertragen von Wärme von der Leiterplatine.
     
    7. Elektronische Einrichtung gemäß Anspruch 6, ferner aufweisend: einen Wärmestreuer (9), der zwischen wenigstens einer der Leiterplatinen (1, 2) und dem Gehäuse (4, 5) angeordnet ist, wobei der Wärmestreuer (9) angepasst ist zum Verteilen von Wärme von der Leiterplatine (1, 2) an das Gehäuse (4, 5).
     
    8. Elektronische Einrichtung gemäß einem der Ansprüche 1 bis 7, ferner aufweisend: eine Wärmeübertragungseinheit (8), die angepasst ist zum Übertragen von Wärme zwischen der ersten Leiterplatine (1) und der zweiten Leiterplatine (2).
     
    9. Elektronische Einrichtung gemäß Anspruch 8, wobei die Wärmeübertragungseinheit (8) eine Schraube ist, die angepasst ist zum Sichern der ersten Leiterplatine (1) und der zweiten Leiterplatine (2) an dem abschirmenden Zwischenrahmen (10), wobei die Schraube optional angepasst ist zum Sichern der ersten Leiterplatine (1), der zweiten Leiterplatine (2) und des abschirmenden Zwischenrahmens (10) an einem Gehäuse (4, 5) für die elektronische Einrichtung (100).
     
    10. Elektronische Einrichtung gemäß Anspruch 8 oder 9, wobei die Wärmeübertragungseinheit (8) angepasst ist zum Übertragen von Wärme von dem abschirmenden Zwischenrahmen (10) und einer oder mehreren Leiterplatinen (1, 2) an eine Außenumgebung.
     
    11. Elektronische Einrichtung gemäß einem der Ansprüche 1 bis 10, wobei wenigstens eine Komponente der ersten Platine (1) mit wenigsten einer Komponente der zweiten Platine (2) gekoppelt ist.
     
    12. Elektronische Einrichtung gemäß einem der Ansprüche 1 bis 11, ferner aufweisend: wenigstens eine aufsteckbare Antenne und eine Diversität-Antenne zum Bereitstellen einer drahtlosen Kommunikation durch wenigstens eine der Leiterplatinen (1, 2).
     
    13. Elektronische Einrichtung gemäß einem der Ansprüche 1 bis 12, wobei der abschirmende Zwischenrahmen (10) mit einem Metall oder mit einer amorphen Legierung geformt ist, und wobei der abschirmende Zwischenrahmen (10) optional strukturelle Steifigkeit bereitstellt.
     
    14. Elektronische Einrichtung gemäß einem der Ansprüche 1 bis 13, ferner aufweisend: einen Verbinder, der angepasst ist zum Bereitstellen einer Kopplung von wenigstens einer der Leiterplatinen (1, 2) mit einer Kommunikationseinrichtung, und wobei der Verbinder optional ein Universell-Seriell-BUS (USB) -Verbinder ist.
     
    15. Elektronische Einrichtung gemäß einem der Ansprüche 1 bis 14, wobei wenigstens eine der Leiterplatinen (1, 2) Modemfähigkeiten für die Kommunikationseinrichtung bereitstellt.
     
    16. Elektronische Einrichtung gemäß einem der Ansprüche 1 bis 15, ferner aufweisend: ein leitfähiges Dichtmittel, das angepasst ist zu gewährleisten, dass eine Stromleckage zwischen dem abschirmenden Zwischenrahmen (10) und wenigstens einer der Leiterplatinen (1, 2) verhindert wird.
     
    17. Verfahren zum Ausbilden einer elektronischen Einrichtung gemäß einem der Ansprüche 1 bis 16, aufweisend:

    Platzieren eines abschirmenden Zwischenrahmens (10) zum Bereitstellen von elektromagnetischer Isolation zwischen einer ersten Leiterplatine (1) und einer zweiten Leiterplatine (2),

    Bereitstellen eines Gehäuses (4, 5), das angepasst ist zum darin Sichern der ersten und der zweiten Leiterplatine (1, 2) und des abschirmenden Zwischenrahmens (10), und

    Formen des Gehäuses (4, 5) mit einem extrudierten Kunststoff und einer amorphen Legierung.


     


    Revendications

    1. Dispositif électronique, comprenant :

    une première carte à circuit imprimé (1) comprenant des composants électroniques ;

    une seconde carte à circuit imprimé (2) comprenant des composants électroniques ; et

    un composant médian de protection (10) apte à fournir une isolation. électromagnétique entre la première carte à circuit imprimé (1) et la seconde carte à circuit imprimé (2), le composant médian de protection (10) étant en outre apte à fournir une isolation électromagnétique des composants électroniques sur au moins l'une de la première carte à circuit imprimé (1) et de la seconde carte à circuit imprimé (2),

    comprenant en outre :

    un boîtier (4, 5) apte à fixer la première carte à circuit imprimé (1), la seconde carte à circuit imprimé (2) et le composant médian de protection (10) à l'intérieur de celui-ci,

    caractérisé en ce que le boîtier (4, 5) est formé d'un plastique extrudé et d'un alliage amorphe.


     
    2. Dispositif électronique selon la revendication 1, dans lequel la première carte à circuit imprimé (1) et la seconde carte à circuit imprimé (2) sont empilées avec le composant médian de protection (10) positionné entre celles-ci.
     
    3. Dispositif électronique selon la revendication 1 ou 2, dans lequel le composant médian de protection (10) est apte à assurer la distribution de la chaleur générée par au moins un composant électronique.
     
    4. Dispositif électronique selon la revendication 1 ou 2, dans lequel le composant médian de protection (10) est apte à assurer la dissipation de la chaleur générée par au moins un composant électronique.
     
    5. Dispositif électronique selon l'une quelconque des revendications 1 à 4, dans lequel le composant médian de protection (10) comprend un premier côté (60) avec au moins une cavité (62, 64, 66) pour loger des composants électroniques de la première carte à circuit imprimée (1) et un second côté (70) avec au moins une cavité pour loger des composants électroniques de la seconde carte à circuit imprimé (2), dans lequel chaque cavité est, facultativement, isolée électromagnétiquement de chaque autre cavité.
     
    6. Dispositif électronique selon l'une quelconque des revendications 1 à 5,
    dans lequel le boîtier (4, 5) comprend un insert métallique pour le transfert de chaleur de la carte à circuit imprimé.
     
    7. Dispositif électronique selon la revendication 6, comprenant en outre :

    un distributeur de chaleur (9) positionné entre au moins l'une des cartes à circuit imprimé (1, 2) et le boîtier (4, 5), le distributeur de chaleur (9) étant apte à distribuer de la chaleur de la carte à circuit imprimé (1, 2) au boîtier (4, 5).


     
    8. Dispositif électronique selon l'une quelconque des revendications 1 à 7, comprenant en outre :

    une unité de transfert de chaleur (8) apte à transférer de la chaleur entre la première carte à circuit imprimé (1) et la seconde carte à circuit imprimé (2).


     
    9. Dispositif électronique selon la revendication 8, dans lequel l'unité de transfert de chaleur (8) est une vis apte à fixer la première carte à circuit imprimé (1) et la seconde carte à circuit imprimé (2) sur le composant médian de protection (10),
    dans lequel la vis est facultativement apte à fixer la première carte à circuit imprimé (1), la seconde carte à circuit imprimé (2) et le composant médian de protection (10) sur un boîtier (4, 5) pour le dispositif électronique (100).
     
    10. Dispositif électronique selon la revendication 8 ou 9, dans lequel l'unité de transfert de chaleur (8) est apte à transférer de la chaleur du composant médian de protection (10) et d'une ou plusieurs cartes à circuit imprimé (1, 2) à un environnement extérieur.
     
    11. Dispositif électronique selon l'une quelconque des revendications 1 à 10, dans lequel au moins un composant de la première carte à circuit imprimé (1) est couplé à au moins un composant de la seconde carte à circuit imprimé (2).
     
    12. Dispositif électronique selon l'une quelconque des revendications 1 à 11, comprenant en outre :

    au moins une antenne encliquetable et une antenne de diversité pour fournir une communication sans fil par au moins l'une des cartes à circuit imprimé (1, 2).


     
    13. Dispositif électronique selon l'une quelconque des revendications 1 à 12, dans lequel le composant médian de protection (10) est formé d'un métal, ou d'un alliage amorphe, dans lequel le composant médian de protection (10) fournit facultativement une rigidité structurelle.
     
    14. Dispositif électronique selon l'une quelconque des revendications 1 à 13, comprenant en outre :

    un connecteur apte à fournir un interfaçage d'au moins l'une des cartes à circuit imprimé (1, 2) avec un dispositif de communication, dans lequel le connecteur est facultativement un connecteur à bus en série universel, USB.


     
    15. Dispositif électronique selon l'une quelconque des revendications 1 à 14, dans lequel au moins l'une des cartes à circuit imprimé (1, 2) fournit des capacités de modem pour le dispositif de communication.
     
    16. Dispositif électronique selon l'une quelconque des revendications 1 à 15, comprenant en outre :

    un mastic conducteur apte à empêcher toute fuite de courant entre le composant médian de protection (10) et au moins l'une des cartes à circuit imprimé (1, 2).


     
    17. Procédé de formation d'un dispositif électronique selon l'une quelconque des revendications 1 à 16, comprenant :

    le positionnement d'un composant médian de protection (10) pour fournir une isolation électromagnétique entre une première carte à circuit imprimé (1) et une seconde carte à circuit imprimé (2),

    la fourniture d'un boîtier (4, 5) apte à fixer la première carte à circuit imprimé (1), la seconde carte à circuit imprimé (2) et le composant médian de protection (10) à l'intérieur de celui-ci, et

    la formation du boîtier (4, 5) dans un plastique extrudé et un alliage amorphe.


     




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    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description