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:
Nov. 21, 2006
Filed:
Mar. 24, 2004
Ryuji Tomita, Kanagawa, JP;
Tetsuya Kurokawa, Kanagawa, JP;
Takashi Ishigami, Kanagawa, JP;
Manabu Iguchi, Kanagawa, JP;
Kazuyoshi Ueno, Kanagawa, JP;
Makoto Sekine, Kanagawa, JP;
Ryuji Tomita, Kanagawa, JP;
Tetsuya Kurokawa, Kanagawa, JP;
Takashi Ishigami, Kanagawa, JP;
Manabu Iguchi, Kanagawa, JP;
Kazuyoshi Ueno, Kanagawa, JP;
Makoto Sekine, Kanagawa, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
A semiconductor device has a first guard ring surrounding a circuit region, a second ring disposed between the circuit region and the first guard ring, and first connections connecting the first guard ring and the second guard ring to each other. An area sandwiched between the first guard ring and the second guard ring is divided by the first connections into a plurality of subareas. Even if the first guard ring is partly defective, water enters from outside into only the subarea which is contiguous to the defective part of the first guard ring.