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. 30, 1992
Filed:
Aug. 06, 1990
Applicant:
Inventor:
Keiichi Kawana, Chiba, JP;
Assignee:
Kawasaki Steel Corporation, Hyogo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ; G11C / ; G11C / ;
U.S. Cl.
CPC ...
365149 ; 365185 ; 36518901 ; 365201 ;
Abstract
There are provided, in addition to an ordinary operation word line for controlling a non-volatile memory upon regularly writing or reading information, a testing word line, a selection transistor, and a storage capacitor, whereby an input signal is transferred onto the testing word line upon inspection to switch on the selection transistor and hence the information is transferred into the capacitor through a bit line for writing into and reading from the capacitor. More specifically, the selection transistor and the capacitor are operated as in a DRAM to diagnose the function of an integrated circuit chip without operation of the non-volatile memory.