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. 18, 2007
Filed:
Jun. 14, 2005
Applicant:
Masatomi Okanishi, Aizuwakamatsu, JP;
Inventor:
Masatomi Okanishi, Aizuwakamatsu, JP;
Assignee:
Spansion LLC, Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/788 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor device includes a substrate having a pair of first diffused regions, and a gate including an oxide film provided on the substrate, and a charge storage layer provided on the oxide film, the charge storage layer being an electrical insulator capable of storing charges in bit areas. The oxide film has first portions related to the bit areas and a second portion that is located between the bit areas and is thicker than the first potions. The first portions serve as tunneling oxide portions, while the second portion allows reduced tunneling.