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:
Jun. 29, 2004
Filed:
Jun. 18, 2002
Applicant:
Inventor:
Naoki Tsuji, Hyogo, JP;
Assignee:
Rensas Technology Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 2/131 ; H01L 2/1469 ;
U.S. Cl.
CPC ...
H01L 2/131 ; H01L 2/1469 ;
Abstract
A semiconductor device includes a trench isolating elements, a memory cell transistor and a peripheral circuit Vcc transistor having a thermal oxide film of a first thickness, and a peripheral circuit Vpp transistor including a thermal oxide film and a thermal oxide film formed before trench formation, having a second thickness greater than the first thickness.