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. 27, 2008
Filed:
Jul. 21, 2004
Manish Deopura, Cambridge, MA (US);
Hem M. Vaidya, Sunnyvale, CA (US);
Pradip K. Roy, Orlando, FL (US);
Manish Deopura, Cambridge, MA (US);
Hem M. Vaidya, Sunnyvale, CA (US);
Pradip K. Roy, Orlando, FL (US);
Neopad Technologies Corporation, Sunnyvale, CA (US);
Abstract
Methods for producing in-situ grooves in CMP pads are provided. In general, the methods for producing in-situ grooves comprise the steps of patterning a silicone lining, placing the silicone lining in, or on, a mold, adding CMP pad material to the silicone lining, and allowing the CMP pad to solidify. CMP pads comprising novel groove designs are also described. For example, described here are CMP pads comprising concentric circular grooves and axially curved grooves, reverse logarithmic grooves, overlapping circular grooves, lassajous groves, double spiral grooves, and multiply overlapping axially curved grooves. The CMP pads may be made from polyurethane, and the grooves produced therein may be made by a method from the group consisting of silicone lining, laser writing, water jet cutting, 3-D printing, thermoforming, vacuum forming, micro-contact printing, hot stamping, and mixtures thereof.