Global patent index - EP 0994491 A2

EP 0994491 A2 2000-04-19 - PCT Thermistorelement

Title (en)

PCT Thermistorelement

Title (de)

PCT thermistor element

Title (fr)

Elément thermistor PCT

Publication

EP 0994491 A2 (EN)

Application

EP 99119643 A

Priority

JP 29094598 A

Abstract (en)

A PTC thermistor element (1) has resistance of 0.2 OMEGA or less at 25 DEG C and includes a planar thermistor body (2) made of a barium titanate ceramic material, a pair of electrodes (2c, 2d) on the main surfaces of the thermistor body (2), a pair of lead wires (3, 4) each bonded to a corresponding one of the pair of electrodes (2c, 2d), and an electrically insulating resin layer (7) covering the thermistor body (2), the electrodes (2c, 2d) and the lead wires (3, 4) entirely except where the lead wires (3, 4) are pulled. The thermistor body (2) has a thickness 0.1 - 0.3mm and each of its mutually oppositely facing main surfaces has an area of 25 - 121 mm<2>. Cu wires or Fe wires having a diameter less than 0.65 mm and covered with a solder are preferably used as the lead wires (3, 4), at least one of them having a kinked portion where it is pulled out of the is thermistor body for absorbing an external force applied at its tip so as to prevent it from reaching the thermistor body (2). The resin layer (7) has a thickness 0.4 - 0.8 mm over the thermistor body (2) and preferably is made of a resin material such as silicone resin materials and epoxy resin materials having bending strength according to JIS K6911 of not less than 10 Mpa and not greater than 50 Mpa. <IMAGE>

IPC 1-7 (main, further and additional classification)

H01C 7/02

IPC 8 full level (invention and additional information)

H01C 7/02 (2006.01)

CPC (invention and additional information)

H01C 7/025 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0994491 A2 20000419; EP 0994491 A3 20020306; JP 2000124004 A 20000428; TW 445463 B 20010711

INPADOC legal status

2002-09-11 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Date of withdrawal: 20020717

2002-03-06 [AK] DESIGNATED CONTRACTING STATES:

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- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2002-03-06 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

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2002-03-06 [RIC1] CLASSIFICATION (CORRECTION)

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- Free Format Text: 7H 01C 7/02 A, 7H 01C 1/14 B

2000-04-19 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19991004

2000-04-19 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-04-19 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

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- Free Format Text: AL;LT;LV;MK;RO;SI