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. 01, 2005
Filed:
Feb. 20, 2004
Tadayuki Taura, Zushi, JP;
Shigeru Atsumi, Yokohama, JP;
Toru Tanzawa, Ebina, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A nonvolatile semiconductor memory device includes a first memory cell array including electrically re-programmable main memory cells, a second memory cell array including electrically data-programmable redundancy memory cells, a first storage configured to store a specified code, a first comparator configured to compare a selected code with the specified code to generate an activating signal, a faulty address latch circuit configured to be activated by the activating signal and controlled to temporarily latch a fault address corresponding to the fault, a second storage configured to store the faulty address latched by the faulty address latch circuit, a second comparator configured to compare an input address with the faulty address to generate a replacement control signal when the input address coincides with the faulty address, and a replacing circuit configured to replace an output of the first memory cell array with an output of the second memory cell array.