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:
Dec. 03, 1996
Filed:
Jun. 05, 1995
Applicant:
Inventors:
Tatsuki Furusho, Hyogo, JP;
Tomohisa Iba, Hyogo, JP;
Assignees:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Mitsubishi Electric Semiconductor Software Corporation, Hyogo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ; G11C / ; G01R / ;
U.S. Cl.
CPC ...
365201 ; 365218 ; 36518533 ; 371 213 ; 437-8 ;
Abstract
According to a time required for programing operation, respective chips of flash memories are divided into a first group and a second group of chips requiring a time longer than the first group for the programing operation, and a postburn-in test, a high temperature test, and a low temperature test are carried out to a plurality of chips belonging to the first group simultaneously, and to a plurality of chips belonging to the second group simultaneously.