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. 21, 2009
Filed:
May. 01, 2006
Shih Hung Chen, Elmsford, NY (US);
Shih Hung Chen, Elmsford, NY (US);
Macronix Internation Co., Ltd., Hsinchu, TW;
Abstract
The surface topology of a plug surface area-containing surface of a semiconductor device can be improved by removing material to create a first planarized surface with at least one plug surface area, typically a tungsten or copper plug area, comprising a recessed region. A material is deposited onto the first planarized surface, to create a material layer, and into the upper portion of the recessed region. The material layer is removed to create a second planarized surface with the material maintained in the upper portion of the recessed region. To form a semiconductor phase change memory device, a phase change element is formed between the at least one plug area, acting as a first electrode, at the second planarized surface and a second electrode.