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:
Sep. 19, 2008
Applicant:
Naoki Yokoi, Tokyo, JP;
Inventor:
Naoki Yokoi, Tokyo, JP;
Assignee:
Elpida Memory, Inc., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 29/94 (2006.01); H01L 29/00 (2006.01); H01L 21/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor memory device in which a plurality of capacitors each including a columnar lower electrode, a capacitor insulation film and an upper electrode are stacked with interlayer films therebetween, a contact plug connects an upper face of each lower electrode of a lower layer with a bottom face of each lower electrode of an upper layer, and another contact plug connects upper electrodes of the capacitors in respective layers with each other.