Method for making a light-activated line-operable zero-crossing switch
US4458408A · kind A · utility
8Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1983 |
| Grant date | Jul 10, 1984 |
| Priority date | — |
| Expiry date | Apr 11, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D84/403
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.