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:
Jul. 26, 2005
Filed:
Jun. 11, 2003
Kenichi Higashi, Nara, JP;
Alberto O. Adan, Ikoma, JP;
Kenichi Higashi, Nara, JP;
Alberto O. Adan, Ikoma, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A the present invention provides an electrostatic discharge protection element to be used in a semiconductor integrated circuit providing MOSFET, comprising a thyristor and a trigger diode for triggering the thyristor into an ON-state, wherein the trigger diode provides an n-type cathode high concentration impurity region, a p-type anode high concentration impurity region and a gate formed between the two high concentration impurity regions, the gate being composed of the same material as that of a gate of MOSFET forming the semiconductor integrated circuit, and the thyristor provided with a p-type high concentration impurity region that forms a cathode and an n-type high concentration impurity region that forms an anode, and the p-type high concentration impurity region provides in a p well and connected to a resistor and/or the n-type high concentration impurity region provided in an n well and connected to a resistor.