Active solid-state devices (e.g. – transistors – solid-state diode – Regenerative type switching device – Having only two terminals and no control electrode – e.g.,...
Reexamination Certificate
2008-05-01
2011-11-01
Nguyen, Dao H (Department: 2818)
Active solid-state devices (e.g., transistors, solid-state diode
Regenerative type switching device
Having only two terminals and no control electrode , e.g.,...
Reexamination Certificate
active
08049247
ABSTRACT:
The present invention discloses an asymmetric bidirectional silicon-controlled rectifier, which comprises: a second conduction type substrate; a first conduction type undoped epitaxial layer formed on the substrate; a first well and a second well both formed inside the undoped epitaxial layer and separated by a portion of the undoped epitaxial layer; a first buried layer formed in a junction between the first well and the substrate; a second buried layer formed in a junction between the second well and the substrate; a first and a second semiconductor area with opposite conduction type both formed inside the first well; a third and a fourth semiconductor area with opposite conduction type both formed inside the second well, wherein the first and second semiconductor areas are connected to the anode of the silicon-controlled rectifier, and the third and fourth semiconductor areas are connected to the cathode of the silicon-controlled rectifier.
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Chuang Che-Hao
Jiang Ryan Hsin-Chin
Ker Ming-Dou
Tseng Tang-Kuei
Amazing Microelectronic Corp.
Chow Ming
Nguyen Dao H
Nguyen Tram H
Sinorica LLC
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