Abstract: A polishing pad having an optically clear bottom layer and a closed cell top layer where the interface between the top and bottom layers is only a urethane to urethane interface. Grooves may be machined into the top layer or through the top layer and into the bottom layer.
Abstract: A polishing pad having an optically clear bottom layer and a closed cell top layer where the interface between the top and bottom layers is only a urethane to urethane interface. Grooves may be machined into the top layer or through the top layer and into the bottom layer.
Abstract: An article or polishing pad for altering a surface of a work piece includes a polymer matrix created by reaction injection molding of size controlled gas bubbles within a polyurethane matrix. The proposed liquid urethane precursor is first injected into an actuated mold and cured. The molded product is then removed from the mold and double side faced or ground to form a single thin polishing pad comprising a single layer of homogeneous material.
Type:
Application
Filed:
July 24, 2006
Publication date:
November 9, 2006
Applicant:
RIMPAD TECH LTD.
Inventors:
Spencer Preston, Doug Hutchins, Steve Hymes
Abstract: An article or polishing pad for altering a surface of a work piece includes a polymer matrix created by reaction injection molding of size controlled gas bubbles within a polyurethane matrix. The proposed liquid urethane precursor is first injected into an actuated mold and cured. The molded product is then removed from the mold and double side faced or ground to form a single thin polishing pad comprising a single layer of homogeneous material.
Type:
Application
Filed:
October 11, 2005
Publication date:
February 16, 2006
Applicant:
RIMPAD TECH LTD.
Inventors:
Spencer Preston, Doug Hutchins, Steve Hymes
Abstract: An article or polishing pad for altering a surface of a work piece includes a polymer matrix created by reaction injection molding of size controlled gas bubbles within a polyurethane matrix. The proposed liquid urethane precursor is first injected into an actuated mold and cured. The molded product is then removed from the mold and double side faced or ground to form a single thin polishing pad comprising a single layer of homogeneous material.
Type:
Grant
Filed:
April 5, 2004
Date of Patent:
January 17, 2006
Assignee:
RimPad Tech Ltd.
Inventors:
Spencer Preston, Doug Hutchins, Steve Hymes