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:
Mar. 07, 1995
Filed:
Mar. 17, 1994
Rikizo Nakano, Kawasaki, JP;
Noriyuki Matsui, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A method of testing bit lines of a memory unit includes the steps of alternately writing a set of first binary values and a set of inverted first binary values to blocks having even block values and to blocks having odd block values for all storage elements within each of a plurality of blocks of the memory unit; setting the memory unit to a stressed condition; alternately reading pieces of binary data from first-row storage elements of the blocks having even block values and from final-row storage elements of the blocks having odd block values by repeatedly inverting a row value of a memory address and incrementing a block value of the memory address for each block; setting the memory unit to a normal condition; and repeating the first setting step, the alternate reading step, and the second setting step for all the columns of the plurality of the blocks.