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. 09, 2005
Filed:
May. 16, 2002
Tien-chi Wu, Yunghe, TW;
Kou-chou Chen, Tainan, TW;
Huai-jen Hsu, Hsinchu, TW;
George Huang, Miaoli, TW;
Tien-Chi Wu, Yunghe, TW;
Kou-Chou Chen, Tainan, TW;
Huai-Jen Hsu, Hsinchu, TW;
George Huang, Miaoli, TW;
Taiwan Semiconductor Manufacturing Co., Ltd, Hsin Chu, TW;
Abstract
A guard ring for protecting against electrostatic discharge (ESD) that has electrically isolated lightning bars has a substrate, a first ring, and a second ring. The first ring is on the substrate and has a number of electrically connected lightning bars. The second ring is also on the substrate and concentric to the first ring, but has a number of lightning bars that are electrically isolated from one another. The first ring may be the outer ring and the second ring may be the inner ring, or vice-versa. The guard ring has an ESD breakdown voltage that does not change, even after the first ring or the second ring has protected against ESD. The guard ring may protect a semiconductor component like a semiconductor photomask or a semiconductor device.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile