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:
Aug. 18, 2015
Filed:
Apr. 27, 2015
Via Technologies, Inc., New Taipei, TW;
Ke-Yuan Chen, New Taipei, TW;
Jyh-Fong Lin, New Taipei, TW;
VIA TECHNOLOGIES, INC., New Taipei, TW;
Abstract
An electrostatic discharge protection device having a P-type substrate, a common N-well formed in the P-type substrate, a common N-doped region formed in the first common N-well, wherein the common N-doped region is electrically connected to a reference voltage node. The device further has a common P-doped region formed in the common N-well, wherein the common P-doped region surrounds the common N-doped region, the common P-doped region and the common N-well form a common diode, a plurality of peripheral N-wells formed in the P-type substrate and surrounding the common N-well, each of the peripheral N-wells comprising a P-type doped region and a N-type doped region, wherein the P-type doped region is electrically connected to one of a plurality of I/O terminals, and a circular P-doped region formed in the P-type substrate and disposed between the common N-well and the peripheral N-wells, and the circular P-doped region surrounding the common N-well.