The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2010
Filed:
Nov. 08, 2007
Applicants:
Bob Cheng, Taipei Hsien, TW;
Tony Ho, Taipei Hsien, TW;
Bouryi Sze, Taipei Hsien, TW;
Inventors:
Assignee:
VIA Technologies Inc., Hsin-Tien, Taipei Hsien, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 1/00 (2006.01); H02H 9/00 (2006.01); H01L 23/62 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electrostatic discharge protection circuit has a substrate; a first P-well installed on the substrate and having a first P+-doped region and a first N+-doped region, both of which are connected to ground; a second P-well installed on the substrate and having a second P+-doped region and a second N+-doped region, both of which are connected to a power supply voltage; and a third P-well installed on the substrate and having a third N+-doped region, a third P+-doped region, and a fourth N+-doped region, all of which are for input/output signals.