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. 03, 2015
Filed:
Aug. 19, 2013
Applicant:
Ps4 Luxco S.a.r.l., Luxembourg, LU;
Inventor:
Koji Taniguchi, Tokyo, JP;
Assignee:
PS4 Luxco S.a.r.l., Luxembourg, LU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 27/088 (2006.01); H01L 27/108 (2006.01); H01L 29/06 (2006.01); G11C 8/14 (2006.01);
U.S. Cl.
CPC ...
H01L 27/10897 (2013.01); G11C 8/14 (2013.01); H01L 29/0619 (2013.01);
Abstract
Provided is a semiconductor device wherein chip size is reduced, while potential on the dummy word lines is fixed. The semiconductor device is provided with: a memory cell array including a plurality of memory cells, a plurality of word lines for controlling memory operations of the plurality of memory cells, and a plurality of dummy word lines that do not participate in memory operations of the plurality of memory cells; and a guard ring surrounding the memory cell array. The plurality of dummy word lines are electrically fixed to the guard ring.