Voltage-dependent resistor and method of manufacturing the same

Details Voltage-dependent resistor and method of manufacturing the same Voltage-dependent resistor and method of manufacturing the same

2006-03-21

2006-03-21

Easthom, Karl D. (Department: 2832)

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

C338S021000

Reexamination Certificate

active

07015787

ABSTRACT:
A voltage-dependent resistor includes a composite of at least one semiconductive ceramic layer mainly containing ZnO and at least one metal oxide layer containing at least one of strontium and barium, at least one of manganese and cobalt, and at least one rare earth element. The material for the at least one metal oxide layer is represented by the general formula M1-xAxBO3where M indicates the at least one rare earth element; A indicates the at least one of strontium and barium; B indicates the at least one of manganese and cobalt; and x≦0.4. The at least one semiconductive ceramic layer, which is an n-type semiconductor, is doped with a trivalent dopant. The total number of the at least one semiconductive ceramic layer and the at least one metal oxide layer is at least three.

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