(19)
(11) EP 1 619 696 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.10.2007 Bulletin 2007/40

(43) Date of publication A2:
25.01.2006 Bulletin 2006/04

(21) Application number: 05253599.4

(22) Date of filing: 10.06.2005
(51) International Patent Classification (IPC): 
H01C 1/01(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR LV MK YU

(30) Priority: 23.07.2004 GB 0416510

(71) Applicant: Welwyn Components Limited
Bedlington, Northumberland NE22 7AA (GB)

(72) Inventor:
  • Jackson, David
    Blyth Northumberland, NE24 5JL (GB)

(74) Representative: Holt, Daniel Richard et al
Mewburn Ellis LLP York House 23 Kingsway
London WC2B 6HP
London WC2B 6HP (GB)

   


(54) Chip resistor for surface mounting and method of manufacturing a chip resistor for surface mounting


(57) The present invention relates to a leadless chip resistor for surface mounting on a circuit board. Conventional leadless chip resistors have a single resistor layer 20 on the upper surface thereof between two conductive plates 50. The present invention proposes a double sided resistor chip, which has resistor layers 20, 320 on both upper and lower faces of the substrate 10 and in conductive contact with electroplated conductive plates 50 which wrap around the ends of the substrate 10. This allows the resistor chip to have a higher pulse energy rating then a conventional surface mounted resistor of the same size. A method of manufacturing the resistor chip is also disclosed.







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