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:
Feb. 25, 2003
Filed:
Mar. 24, 2000
Bih-Tiao Lin, Ping-Tung Hsien, TW;
Taiwan Semiconductor Manufacturing Co., Ltd., Hsinchu, TW;
Abstract
A method of fabricating copper damascene. In this invention, only crystalline copper metal layer is formed inside the damascene trench and only amorphous copper metal layer is formed outside the damascene trench. During stacking the copper metal layer, copper metal stacks up to form crystalline copper metal with good lattice packing according to the position of the copper seed layer. Conversely, amorphous copper metal is formed in positions where no copper seed layer exists. Since the amorphous copper metal is softer than the crystalline copper metal, lower pressure and the ordinary slurry are used in chemical mechanical polishing to remove amorphous copper metal layer outside the damascene trench, in order to form a flat-surfaced copper damascene structure.