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:
Apr. 02, 2013
Filed:
Oct. 31, 2008
Masaki Aoki, Kawasaki, JP;
Masaki Aoki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A method of writing into a semiconductor memory device, which includes a resistance memory elementwhich memorizes a high resistance state and a low resistance state and switches between the high resistance state and the low resistance state by an application of a voltage; a transistorincluding a drain terminal connected to one terminal of the resistance memory elementand a source terminal connected to a reference voltage; and a transistorincluding a source terminal connected to the other terminal of the resistance memory element. When a write voltage is applied to the resistance memory elementvia the transistorto switch the resistance memory elementfrom the low resistance state to the high resistance state, a voltage to be applied to the resistance memory elementis controlled at a value which is not less than a reset voltage of the resistance memory elementand less than a set voltage of the resistance memory elementby controlling a voltage to be applied to a gate terminal of the transistorso as to be set at a value which is not less than a total of the reset voltage and a threshold voltage of the transistorand is less than a total of the set voltage and the threshold voltage of the transistor