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:
Jul. 31, 2018
Filed:
Sep. 15, 2016
Applicant:
International Business Machines Corporation, Armonk, NY (US);
Inventors:
Chung H. Lam, Peekskill, NY (US);
Scott C. Lewis, Essex Junction, VT (US);
Thomas M. Maffitt, Burlington, VT (US);
Jack Morrish, Shelburne, VT (US);
Assignee:
INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G11C 11/56 (2006.01); G11C 13/00 (2006.01);
U.S. Cl.
CPC ...
G11C 13/0069 (2013.01); G11C 11/5678 (2013.01); G11C 13/004 (2013.01); G11C 13/0004 (2013.01); G11C 13/0026 (2013.01); G11C 2013/0054 (2013.01); G11C 2013/0066 (2013.01); G11C 2013/0078 (2013.01); G11C 2013/0092 (2013.01);
Abstract
Structures and methods for a multi-bit phase change memory are disclosed herein. A method includes establishing a write-reference voltage that incrementally ramps over a write period. The increments of the write-reference voltage correspond to discrete resistance states of a storage cell of the multi-bit phase change memory.