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:
Dec. 09, 2008
Filed:
Sep. 28, 2005
Tomoaki Shino, Kawasaki, JP;
Tomoaki Shino, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A semiconductor memory device includes a semiconductor layer; a source layer provided in the semiconductor layer; a drain layer provided in the semiconductor layer; a body region provided in the semiconductor layer between the source layer and the drain layer; a gate insulation film provided on the body region; and a gate electrode provided on the gate insulation film, wherein data are written or read out by accumulating electric charge in the body region or releasing electric charge from the body region, and wherein a difference between the potential Vof the source layer in a data-retaining period and the potential Vof the gate electrode in the data-retaining period is smaller than a difference between the potential Vof the source layer in a data write period and the potential V.