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:
Sep. 13, 2005
Filed:
Jul. 13, 2000
Yoko Horiguchi, Tokyo, JP;
Yoko Horiguchi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A semiconductor integrated circuit is provided, which has an improved withstanding voltage for electrostatic breakdown at the time of electrostatic discharge by the charged device model, in the case of protecting a MOS capacitor provided at the input side of the internal circuit. The semiconductor integrated circuit comprises an internal circuitfor inputting an external signal, an internal circuit MOS capacitor, one end of which is connected to a power source wirefor supplying the source voltage and the other end of which is connected to a ground potential wirefor supplying the ground potential; a ground terminalto which one end of the ground potential wire is connected; an electrostatic protection elementconnected in parallel with the MOS capacitorbetween the ground terminaland the MOS capacitor, wherein the MOS capacitor and the electrostatic protection element are connected between the power source wire and the ground potential wire such that the wire resistance Rof the ground potential wire between the ground terminal and the connection point with one end of the electrostatic protection element is larger than the wire resistance Rof the ground potential wire between the connection point with one end of the electrostatic protection element and the connection point with one end of the MOS capacitor.