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. 17, 2007
Filed:
May. 11, 2005
Kazunari Kido, Kanagawa, JP;
Yasushi Kasa, Tokyo, JP;
Minoru Yamashita, Kanagawa, JP;
Kazuhiro Kurihara, Tokyo, JP;
Hiroaki Wada, Tokyo, JP;
Kazunari Kido, Kanagawa, JP;
Yasushi Kasa, Tokyo, JP;
Minoru Yamashita, Kanagawa, JP;
Kazuhiro Kurihara, Tokyo, JP;
Hiroaki Wada, Tokyo, JP;
Spansion LLC, Sunnyvale, CA (US);
Abstract
The semiconductor device of the present invention includes at least one dummy cell of a programmed state proximately located to an edge of a reference cell array. Thus, the leak current does not flow when a data of the cell on the edge of the reference cell array is read out. The memory cell located around the center of the reference cell array has neighboring cells of the programmed state, and the leak current can be prevented when the data is read out from all the reference cells. Thus, the reference current can be supplied stably.