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:
Feb. 06, 2007
Filed:
Nov. 22, 2002
Janice M. Adams, Jericho, VT (US);
Frank O. Distler, Williston, VT (US);
Mark F. Ollive, Milton, VT (US);
Michael R. Ouellette, Westford, VT (US);
Jeannie H. Panner, Underhill, VT (US);
Janice M. Adams, Jericho, VT (US);
Frank O. Distler, Williston, VT (US);
Mark F. Ollive, Milton, VT (US);
Michael R. Ouellette, Westford, VT (US);
Jeannie H. Panner, Underhill, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and system for repairing defective memory in a semiconductor chip. The chip has memory locations, redundant memory, and a central location for ordered fuses. The ordered fuses identify in compressed format defective sections of the memory locations. The defective sections are replaceable by sections of the redundant memory. The ordered fuses have an associated a fuse bit pattern of bits which sequentially represents the defective sections in the compressed format. The method and system determines the order in which the memory locations are wired together; designs a shift register of latches through the memory locations in accordance with the order in which the memory locations are wired together; and associates each of the latches with a corresponding bit of an uncompressed bit pattern from which the fuse bit pattern is derived. The uncompressed bit pattern comprises a sequence of bits, representing the defective sections in uncompressed format.