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:
Nov. 04, 1997
Filed:
Mar. 20, 1996
Applicant:
Inventor:
Norimitsu Sako, Tokyo, JP;
Assignee:
Kawasaki Steel Corporation, Hyogo-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365 96 ; 36523001 ; 365207 ;
Abstract
A semiconductor device has a constant-current circuit selectively operative in an operation mode among a writing mode in which a writing current for causing the antifuse to change in state from a breaking state to a conductive state is supplied to the antifuse, a sense mode in which a sensing current for detecting a state of the antifuse is supplied to the antifuse, and an additional writing mode in which an additional writing current for performing an additional writing is supplied to the antifuse which is subjected to writing.