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. 15, 2011
Filed:
Sep. 21, 2005
Kenichi Osada, Tokyo, JP;
Naoki Kitai, Tachikawa, JP;
Takayuki Kawahara, Higashiyamato, JP;
Kazumasa Yanagisawa, Machida, JP;
Kenichi Osada, Tokyo, JP;
Naoki Kitai, Tachikawa, JP;
Takayuki Kawahara, Higashiyamato, JP;
Kazumasa Yanagisawa, Machida, JP;
Renesas Electronics Corporation, Kawasaki-shi, JP;
Abstract
At the time of, for example, a set operation (SET) for making a phase-change element in a crystalline state, a pulse of a voltage Vreset required for melting the element is applied to the phase-change element, and subsequently a pulse of a voltage Vset that is lower than Vreset and is required for crystallizing the element is applied thereto. And, the magnitude of this voltage Vset is then changed depending on the ambient temperature so that the magnitude of the voltage Vset is small as the temperature becomes high (TH). In this manner, a margin of a write operation between the set operation and a reset operation (RESET) for making the element to be in amorphous state is improved.