METHOD FOR MANUFACTURING POLISHING HEAD AND POLISHING APPARATUS
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United States of America Patent
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Issued Date -
Mar 24, 2011
app pub date -
Jun 2, 2009
filing date -
Jun 24, 2008
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Abandoned
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Abstract
A method for manufacturing a polishing head having an annular rigid ring; a rubber film bonded to the rigid ring with uniform tension; a mid plate joined to the rigid ring, forming a space together with the rubber film and the rigid ring; and a mechanism for changing pressure of the space, the method including performing a tensile test on the rubber film according to JIS K6251 before bonding the rubber film to the rigid ring, and selecting the rubber film having a value of 10 MPa or less of an inclination obtained by a linear approximation of a stress-strain curve within a strain value of 5%; and bonding the selected rubber film having a value of 10 MPa or less of the inclination to the rigid ring to manufacture the polishing head.
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