PTC resistor device

Details PTC resistor device PTC resistor device

1984-09-04

1987-01-06

Goldberg, E. A.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

338 22R, 219541, H01C 710

Patent

active

046350268

ABSTRACT:
A positive temperature coefficient (PTC) device, preventing silver migration effect and partial excessive heating, comprises a circular semiconductor PTC ceramic plate having a pair of first non-silver conductive layers attached on both surfaces of said PTC ceramics plate. A pair of second conductive layers, including silver, is attached on the first layers and an elongated periphery portion on the first layers is left without said second layers. A pair of conductive terminals couples the PTC element with an external circuit, each terminal having a convex portion to contact and support the PTC plate at the second layers so that the first layers do not directly touch with the terminals.

REFERENCES:
patent: 3245019 (1966-04-01), Heywang et al.
patent: 3268844 (1966-08-01), Bergsma
patent: 4232214 (1980-11-01), Shioi et al.

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