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. 03, 2014
Filed:
Mar. 08, 2012
Applicant:
Nan Wu, Tokyo, JP;
Inventor:
Nan Wu, Tokyo, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 29/15 (2006.01); H01L 31/0256 (2006.01); H01L 27/108 (2006.01); H01L 29/66 (2006.01); H01L 21/3205 (2006.01); H01L 21/44 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor device includes a semiconductor substrate having a groove and an active region adjacent to the groove; a buried gate electrode in the groove; and a capacitor contact including a first portion and a second portion over the first portion. The first portion is greater in horizontal dimension than the second portion. The first portion has a bottom surface that is in contact with an upper surface of the active region.