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. 15, 2008
Filed:
Nov. 29, 2005
Yong Soo Choi, Gyunggi-do, KR;
Yong Soo Choi, Gyunggi-do, KR;
Hynix Semiconductor Inc., Icheon-si, KR;
Abstract
A polishing pad for chemically mechanically polishing a semiconductor wafer comprises a first groove pattern circularly formed on the surface of the polishing pad, and a second groove pattern formed on the surface of the polishing pad while spirally extending from the circular center of the polishing pad to the outside so as to overlap the first groove pattern. The polishing pad further comprises a third groove pattern formed on the surface of the polishing pad while radially extending from the circular center of the polishing pad to the outside so as to overlap the first and second groove patterns. A chemical mechanical polishing apparatus comprises the polishing pad. The polishing pad of the chemical mechanical polishing apparatus has enhanced groove patterns formed on the polishing pad to provide uniform distribution of the slurry, thereby enhancing polishing speed and polishing uniformity.