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. 19, 2010
Filed:
Dec. 31, 2008
Applicant:
Jusuke Ogura, Kawasaki, JP;
Inventor:
Jusuke Ogura, Kawasaki, JP;
Assignee:
Fujitsu Semiconductor Limited, Yokohama, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L 21/336 (2006.01);
U.S. Cl.
CPC ...
Abstract
The semiconductor device comprises a silicon substratehaving a step formed in the surface which makes the surface in a flash memory cell regionlower than the surface in a peripheral circuit region; a device isolation regionformed in a trenchin the flash memory cell region; a device isolation regionformed in a trenchdeeper than the trenchin the peripheral circuit region; a flash memory cellincluding a floating gateand a control gateformed on the device region defined by the device isolation region; and transistorsformed on the device regions defined by the device isolation region