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:
Nov. 05, 2013
Filed:
Dec. 20, 2011
Applicant:
Hiroaki Takasu, Chiba, JP;
Inventor:
Hiroaki Takasu, Chiba, JP;
Assignee:
Seiko Instruments Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/788 (2006.01);
U.S. Cl.
CPC ...
Abstract
Provided is an electrically erasable and programmable nonvolatile semiconductor memory device having a tunnel region; the tunnel region and the peripheral of the tunnel region are dug down to be made lower, and a depletion electrode, to which an arbitral potential is given to deplete a part of the tunnel region through a depletion electrode insulating film, is arranged in the lowered drain region.