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:
Apr. 07, 2009
Filed:
Sep. 18, 2007
Applicants:
Ishtiaq Ahsan, Wallkill, NY (US);
Louis Lu-chen Hsu, Fishkill, NY (US);
Xu Ouyang, Hopewell Junction, NY (US);
Inventors:
Ishtiaq Ahsan, Wallkill, NY (US);
Louis Lu-Chen Hsu, Fishkill, NY (US);
Xu Ouyang, Hopewell Junction, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11C 8/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for using photolithographic dummy memory cells arranged in rings around a set of primary memory cells as test structures and as redundant memory cells. Also circuits and structures of memory arrays having multiple-use dummy memory cells.