Surface-mounted thermistor and manufacturing method thereof

Details Surface-mounted thermistor and manufacturing method thereof Surface-mounted thermistor and manufacturing method thereof

2007-02-06

2007-02-06

Hoang, Tu (Department: 2832)

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

C338S025000, C338S028000

Reexamination Certificate

active

10859505

ABSTRACT:
A thermistor, which is to be mounted on a PCB, for protecting other circuit elements is disclosed. Electrode patterns separately formed on both surfaces of a film resistance element are respectively shaped into two parts which are engaged to each other with a non-conductive gap interposed therebetween. Thus, a Tombstone phenomenon caused by asymmetric structure may be fundamentally prevented. Grooves are formed in both sides of the thermistor, and connection portions for electrically connecting the electrodes formed on both surfaces of the thermistor are formed through the inside of the grooves or through the sides except the grooves. Thus, though a crack arises in the connection portion, it is possible to prevent the crack from being propagated to the entire connection portion along the side of the thermistor.

REFERENCES:
patent: 6380839 (2002-04-01), Li et al.
patent: 6556123 (2003-04-01), Iwao et al.
patent: 2003/0227731 (2003-12-01), Huang et al.
patent: 2004/0108936 (2004-06-01), Han et al.
patent: 2005/0062581 (2005-03-01), Koyama
patent: 10-125505 (1998-05-01), None
patent: 1998-080414 (1998-11-01), None
patent: 2000-0062369 (2000-10-01), None
patent: 2001-0021548 (2001-03-01), None

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