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:
Jul. 22, 2003
Filed:
Feb. 12, 2002
Gen Koshita, Tokyo, JP;
Other;
Abstract
A semiconductor memory device including a plurality of normal memory cells ( ) and redundant memory cells ( ) is disclosed. Normal memory cells ( ) may include true normal memory cells and complement normal memory cells. Redundant memory cells ( ) may include true redundant memory cells and complement redundant memory cells. When a normal memory cell ( ) is found to be a defective memory cell, it may be replaced by a replacement redundant memory cell from the plurality of redundant memory cells ( ). A defective memory cell that is a true normal memory cell may be replaced with a replacement memory cell that is a true redundant memory cell and a defective memory cell that is a complement memory cell may be replaced with a replacement memory cell that is a complement redundant memory cell. In this way, electric and physical conditions of a replacement memory cell may be essentially the same as the electric and physical conditions of the defective memory cell would have been had it not been replaced.