Electrostatic discharge circuit using forward biased...

Details Electrostatic discharge circuit using forward biased... Electrostatic discharge circuit using forward biased...

2011-08-16

2011-08-16

Nguyen, Ha Tran T (Department: 2829)

Active solid-state devices (e.g., transistors, solid-state diode

With specified shape of pn junction

C361S054000

Reexamination Certificate

active

07999357

ABSTRACT:
The present invention advantageously provides a circular-arc shaped structure for forward biased steering diodes used in an ESD circuit, which circular arc shaped structure forward biases steering diodes effectively prevent concentration of an ESD pulse to one section of the p-n junction within the forward biased steering diode (or, alternatively viewed, evenly distributing stress along the entire p-n junction), thus increasing reliability of the ESD circuit, and also minimizing input capacitance as well as occupying a smaller area. The circular-arc shaped structure thus provides a mechanism to evenly distribute the current flow through the ESD steering diodes, and therefore avoids the disadvantage of a voltage gradient along the steering diode structure.

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