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:
May. 29, 2012
Filed:
Dec. 01, 2010
Ilya V. Karpov, Santa Clara, CA (US);
Sergey Kostylev, Bloomfield Hills, MI (US);
Charles C. Kuo, Union City, CA (US);
Ilya V. Karpov, Santa Clara, CA (US);
Sergey Kostylev, Bloomfield Hills, MI (US);
Charles C. Kuo, Union City, CA (US);
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
A ring shaped heater surrounds a chalcogenide region along the length of a cylindrical solid phase portion thereof defining a change phase memory element. The chalcogenide region is formed in a sub-lithographic pore, so that a relatively compact structure is achieved. Furthermore, the ring contact between the heater and the cylindrical solid phase portion results in a more gradual transition of resistance versus programming current, enabling multilevel memories to be formed.