Electrical resistors – Resistance value responsive to a condition – Current and/or voltage
Patent
1990-11-19
1992-06-02
Lateef, Marvin M.
Electrical resistors
Resistance value responsive to a condition
Current and/or voltage
338 21, H01C 710
Patent
active
051190621
ABSTRACT:
A monolithic type varistor in which a plurality of inner electrodes are arranged in a sintered body composed of semiconductor ceramics so as to be overlapped with each other while being separated by semiconductor ceramic layers. The plurality of inner electrodes are electrically connected to first and second outer electrodes formed on both end surfaces of the sintered body. One or more non-connected type inner electrodes are arranged between adjacent ones of the plurality of inner electrodes and are not electrically connected to the outer electrodes, each of the non-connected type inner electrodes being spaced apart from each adjacent inner electrode or non-connected type inner electrode while being separated therefrom by a semiconductor ceramic layer. Voltage non-linearity is obtained by Schottky barriers formed at the interface of the inner electrode and the semiconductor ceramic layer and the interface of the non-connected type inner electrode and the semiconductor ceramic layer. The value of the number of grain boundaries between semiconductor particles in at least one semiconductor ceramic layer is two or less.
REFERENCES:
patent: 4383237 (1983-05-01), Eda et al.
patent: 4729058 (1988-03-01), Gupta et al.
Higashi Tohru
Nakamura Kazutaka
Nakayama Akinori
Sakabe Yukio
Taira Hiroaki
Lateef Marvin M.
Murata Manufacturing Co. Ltd.
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