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:
May. 12, 2009
Filed:
May. 05, 2004
Tao Cheng, Hsin-Chu, TW;
Hsueh-kun Liao, Hsin-Chu Hsien, TW;
Tao Cheng, Hsin-Chu, TW;
Hsueh-Kun Liao, Hsin-Chu Hsien, TW;
Mediatek Inc., Hsin-Chu, TW;
Abstract
An electro static discharge (ESD) protection circuit employing a field-effect transistor (FET) having no silicide block disposed thereon. It is connected with an internal circuit so as to prevent the internal circuit from the influence of an ESD event, wherein the internal circuit has at least a signal input end. The ESD protection circuit includes: an ESD clamp circuit for providing an ESD grounding path as an ESD occurs; and at least a pair of p-n junction diodes. The p-n junction diodes are stacked so that one of the p-n junction diodes has a n-type end coupled to the signal input end and the other one has a p-type end coupled to the signal input end as well. The ESD clamp circuit has at least a FET, whose drain has no silicide block disposed thereon.