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:
Jul. 16, 2013
Filed:
Mar. 21, 2011
Takafumi Shimotori, Kawasaki, JP;
Yoichi Minemura, Yokkaichi, JP;
Hiroshi Kanno, Yokkaichi, JP;
Takayuki Tsukamoto, Yokkaichi, JP;
Jun Nishimura, Kuwana, JP;
Masahiro Une, Hiroshima, JP;
Takafumi Shimotori, Kawasaki, JP;
Yoichi Minemura, Yokkaichi, JP;
Hiroshi Kanno, Yokkaichi, JP;
Takayuki Tsukamoto, Yokkaichi, JP;
Jun Nishimura, Kuwana, JP;
Masahiro Une, Hiroshima, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, a method for controlling a semiconductor device comprises determining a select bit number for a group of memory cells each includes a variable-resistance element, setting a first voltage corresponding to the select bit number, applying the set first voltage to the memory cell group, and performing verify read on the memory cell group to which the first voltage has been applied and determining whether or not the memory cell group passes the verify read. If the memory cell group is determined not to pass the verify read, the number of bits corresponding to passed memory cells is subtracted from the select bit number, and the first voltage corresponding to the decreased select bit number is set again.