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. 29, 2006
Filed:
Jul. 22, 2004
Noriyuki Kodama, Kanagawa, JP;
Koichi Sawahata, Kanagawa, JP;
Noriyuki Kodama, Kanagawa, JP;
Koichi Sawahata, Kanagawa, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
A multifinger ESD protection element has between an input wiring to which a surge current is input and a reference-potential wiring, 2n-number (where n is a natural number of 2 or greater) of fingers Fto F. A drain resistor Rd(i=1 to 2n), NMOS transistor Tand source resistor Rsare connected serially in each finger Fin the order mentioned. A single unit Uis constructed by two mutually adjacent fingers Fand F(where j is a natural number of 1 to n). In each unit the source of one transistor is connected to the gate of the other transistor and the source of this other transistor is connected to the gate of the first-mentioned transistor. The source Sof finger Fis connected to the source Sof the next unit U. The 2n-number of fingers are connected in the form of a ring.