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:
Mar. 29, 2011
Filed:
Mar. 03, 2009
Applicant:
Natsuki Sato, Tokyo, JP;
Inventor:
Natsuki Sato, Tokyo, JP;
Assignee:
Elpida Memory, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 47/00 (2006.01); H01L 29/66 (2006.01); H01L 21/70 (2006.01); H01L 21/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A phase change memory device is provided in which the area of contact between phase change material and heater electrode is reduced to suppress current required for heating and a phase change region is formed directly on a contact to raise the degree of integration. The device comprises a heater electrode in which the lower part thereof is surrounded by a side wall of a first insulating material and the upper part thereof protruding from the side wall has a sharp configuration covered by a second insulating material except for a part of the tip end thereof, and the exposed tip end is coupled to the phase change material layer.