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:
Jun. 29, 2004
Filed:
Jul. 12, 2002
Toshihiro Abe, Tokyo, JP;
Yoshio Kasai, Tokyo, JP;
Naoki Ootani, Tokyo, JP;
Mitsuru Sugita, Tokyo, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
Redundant circuits to are provided in correspondence to memory blocks to , respectively. Bit lines BL to BL are located across the memory blocks. Spare bit lines SBL and SBL are located across the redundant circuits to . When a memory cell failure occurs in the memory block except a predetermined memory block (for example, a boot block) and when the bit line BL corresponding to the memory cell failure is replaced with the spare bit line SBL , each of switches and is put into an on state in correspondence to the spare bit line SBL . Furthermore, each of switches and is put into the on state in correspondence to the bit line BL . As a result, the spare bit line SBL turns the redundant circuit corresponding to the memory block , to be connected to the memory block