PTC THERMISTOR CHIP - MATSUSHITA ELECTRIC IND CO LTD

Title:

PTC THERMISTOR CHIP

Document Type and Number:

WIPO Patent Application WO/1999/053504

Kind Code:

A1

Abstract:

A PTC polymer thermistor chip for surface mount assembly, which assures longtime connection reliability between electrodes and side leads. A first main electrode (12a) and a first auxiliary electrode (12b) are provided on a first face of a conductive PTC polymer hexahedron (11). A second main electrode (12c) and a second auxiliary electrode (12d) are provided on a second face on the opposite side of the first face. First and second side electrodes (13a, 13b) are formed of nickel plating thicker than 1/20 of the distances between the first and second main electrodes (12a, 12c) and extend from the side of the conductive polymer (11) to both upper and lower sides. The first and second side electrodes (13a, 13b) connect electrically between the first main electrode (12a) and the second auxiliary electrode (12d) and between the first auxiliary electrode (12b) and the second main electrode (12c), respectively.

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Inventors:

IKEDA TAKASHI (JP)
MORIMOTO KOHICHI (JP)
KOJIMA JUNJI (JP)
IKEUCHI KIYOSHI (JP)
IWAO TOSHIYUKI (JP)

Application Number:

PCT/JP1999/001852

Publication Date:

October 21, 1999

Filing Date:

April 07, 1999

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
IKEDA TAKASHI (JP)
MORIMOTO KOHICHI (JP)
KOJIMA JUNJI (JP)
IKEUCHI KIYOSHI (JP)
IWAO TOSHIYUKI (JP)

International Classes:

H01C1/14; H01C7/02; H01C17/00; H05K3/34; (IPC1-7): H01C7/02

Foreign References:

JPH09129414A	1997-05-16
JPH07201533A	1995-08-04
JPH05129105A	1993-05-25

Other References: