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:
Apr. 05, 2011
Filed:
May. 20, 2008
Applicants:
Mutsumi Suzuki, Kodaira, JP;
Masakazu Sagawa, Inagi, JP;
Toshiaki Kusunoki, Tokorozawa, JP;
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
By making Nd concentration in the tunneling insulating filmsmaller than Nd concentration in the base electrode first layer, the accumulated electric charge amount in the tunneling insulating filmis reduced and afterimage is decreased. By setting a relation between a position of a stack interface of the base electrodeand a thickness of an insulating layer properly, the generation of a device defect is prevented.