Complementary-SCR electrostatic discharge protection circuit
US5473169A · kind A · utility
38Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1995 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Mar 17, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D89/711
Abstract
A complementary-SCR electrostatic discharge protection circuit in a silicon substrate, coupling to I/O pads for bypassing electrostatic current of positive or negative polarity respect to power supply voltages V.sub.DD and V.sub.SS. The circuit comprises a first SCR and a second SCR each having an anode, a cathode, an anode gate and a cathode gate. The circuit of the present invention preferably includes a finger type layout structure for providing a larger capacity to bypass electrostatic current. It is also characterized by a base-emitter shorting design to avoid a V.sub.DD -to-V.sub.SS latch-up effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.