Method for making a light-activated line-operable zero-crossing

Details Method for making a light-activated line-operable zero-crossing Method for making a light-activated line-operable zero-crossing

1983-04-11

1984-07-10

Tung, T.

Metal working

Method of mechanical manufacture

Assembling or joining

357 35, 357 39, 357 23, 357 30, 357 47, 29572, H01L 29747

Patent

active

044584083

ABSTRACT:
A monolithic light-activated line-operable zero-crossing switch and method of making the same. The device comprises anti-parallel thyristors, each of whose gates is shunted by a field effect transistor. Each device may also be shunted by a resistor to reduce the overall sensitivity. The method of making the device contemplates surrounding the field effect transistor gate electrode and an internal shunt electrode by the primary metallization which forms the contact to the two main terminals of the device.

REFERENCES:
patent: 3427512 (1969-02-01), Mapother
patent: 3432731 (1969-03-01), Whittier
patent: 3812405 (1974-05-01), Clark
patent: 3831187 (1974-08-01), Neilson
patent: 4015143 (1977-03-01), Tokunaga et al.
patent: 4084110 (1978-04-01), Okuhara et al.
patent: 4100565 (1978-07-01), Khajezadeh et al.
patent: 4224634 (1980-09-01), Svedberg
patent: 4396932 (1983-08-01), Alonas et al.

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