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:
Oct. 06, 2009
Filed:
Mar. 03, 2006
Hiroshi Iwata, Nara-ken, JP;
Akihide Shibata, Nara, JP;
Masayuki Nakano, Nara, JP;
Sharp Kabushiki Kaisha, Osaka-shi, JP;
Abstract
A semiconductor storage device has a semiconductor layer having a first conductivity type region and two second conductivity type regions separated from each other by the first conductivity type region, a memory function body formed on a surface of the semiconductor layer, and a gate electrode. The memory function body has a charge storage insulator and a charge retention insulator positioned between the charge storage insulator and the semiconductor layer, and doubles as a gate insulating film. The charge retention insulator contains such impurity atoms (phosphorus) as would cause an intrinsic semiconductor to be of the second conductivity type.