Optically triggered lateral thyristor with auxiliary region
US4779126A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 1986 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Sep 12, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/13091
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An optically triggered lateral thyristor consists of a plurality of individual lateral thyristor elements connected in parallel. Each element has an active base region which contains a respective cathode region. Each of the base regions is carried in a common conductivity type body. Extending fingers of a continuous anode electrode partly enclose each individual base region to enable the parallel connection of the individual devices. The thyristor base and emitter zones are surrounded by an auxiliary P region which is resistively connected to a field plate and the cathode electrode to improve emitter collection efficiency. The cathode electrode and anode electrode are interdigitated. The cathode electrode is connected to spaced, parallel, generally rectangular emitter regions which are disposed in respective bases between loops of the cathode electrode. Radiation applied to the surface of the device by a noncritical photo source produces the effect of a gate current in order to turn on the device. A resistor, zener diode, capacitor and a plurality of parallel connected MOSFETs are integrated into the chip to define a control circuit for controlling the turn-on of the main lateral t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.