Polishing media stabilizer
First Claim
Patent Images
1. An apparatus for stabilizing a polishing surface comprising:
- a substantially planar inflexible support base;
a flexible, advanceable polishing pad overlying the support base;
a resilient pad interposed between the polishing pad and the support base, the resilient pad being at least one of perforated and porous;
one or more vacuum ports disposed in the support base and underlying the polishing pad, wherein application of vacuum through the one or more vacuum ports pulls the polishing pad against the support base to maintain the polishing pad in a predetermined polishing position; and
a seal forming a perimeter around the one or more vacuum ports on the support base, wherein an airtight seal is formed between the support base and the polishing pad along the seal upon the application of vacuum.
1 Assignment
0 Petitions
Accused Products
Abstract
A polishing apparatus that employs a polishing media retention arrangement to prevent slippage or wrinkles in the polishing media during polishing. The polishing media is drawn against a support surface by a vacuum applied between the polishing media and the support surface. Also, a porous layer may be placed between the polishing media and the support surface to form dimples in the polishing media upon the application of vacuum. An alternative arrangement draws the polishing media against a carrier and the substrate to be polished.
-
Citations
20 Claims
-
1. An apparatus for stabilizing a polishing surface comprising:
-
a substantially planar inflexible support base; a flexible, advanceable polishing pad overlying the support base; a resilient pad interposed between the polishing pad and the support base, the resilient pad being at least one of perforated and porous; one or more vacuum ports disposed in the support base and underlying the polishing pad, wherein application of vacuum through the one or more vacuum ports pulls the polishing pad against the support base to maintain the polishing pad in a predetermined polishing position; and a seal forming a perimeter around the one or more vacuum ports on the support base, wherein an airtight seal is formed between the support base and the polishing pad along the seal upon the application of vacuum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A polishing apparatus comprising:
-
a flexible polishing pad adapted to contact a front surface of a substrate to be polished; a substrate carrier adapted to support a back surface of the substrate; at least one vacuum port adapted to apply vacuum against the flexible polishing pad; and a sealing ring contacting the flexible polishing pad and forming a perimeter around the one or more vacuum ports. - View Dependent Claims (12, 13, 14, 15, 16)
-
-
17. An apparatus for stabilizing a polishing media comprising:
-
a substantially planar inflexible support base having a top surface; a sealing ring disposed on the top surface of the support base; an advanceable polishing media disposed over the top surface of the support base and contacting the sealing ring; a means for drawing the polishing media against the support surface; and at least two rolling turnbar elements wherein a tensioned portion forms straight-line tangent segments between the turnbar elements. - View Dependent Claims (18, 19, 20)
-
Specification