Integrated platen assembly for a chemical mechanical planarization system
First Claim
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1. An apparatus for supporting a web of polishing material, comprising:
- a platen assembly having a support surface;
a web of polishing material having a first portion disposed across the support surface and a second portion wound on a first roll coupled to the platen assembly;
a platen port disposed in the platen assembly and fluidly coupled to the support surface;
a venturi having a vacuum port fluidly coupled to the platen port, a pressure supply port and an exit port, wherein fluid flowing between the pressure supply port and the exit port pulls fluid through the vacuum port;
a valve fluidly coupled to the exit port, the valve having a first state that causes vacuum to be drawn through the vacuum port and a second state that causes flow from the vacuum port through the platen port; and
a tensioning mechanism coupled to the platen assembly and adapted to tension the web of polishing material in response to a diameter of the second portion of the web of polishing material wound on the first roll.
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Abstract
A method and apparatus for supporting a web of polishing material are generally provided. In one embodiment, an apparatus for supporting a web of polishing material includes a web of polishing media having a first portion disposed across a support surface of a platen assembly and a second portion wound on a first roll coupled to the platen assembly. A tensioning mechanism is coupled to the platen assembly and adapted to tension the web of polishing media in response to a diameter of the second portion of the web of polishing material wound on the first roll.
126 Citations
22 Claims
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1. An apparatus for supporting a web of polishing material, comprising:
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a platen assembly having a support surface;
a web of polishing material having a first portion disposed across the support surface and a second portion wound on a first roll coupled to the platen assembly;
a platen port disposed in the platen assembly and fluidly coupled to the support surface;
a venturi having a vacuum port fluidly coupled to the platen port, a pressure supply port and an exit port, wherein fluid flowing between the pressure supply port and the exit port pulls fluid through the vacuum port;
a valve fluidly coupled to the exit port, the valve having a first state that causes vacuum to be drawn through the vacuum port and a second state that causes flow from the vacuum port through the platen port; and
a tensioning mechanism coupled to the platen assembly and adapted to tension the web of polishing material in response to a diameter of the second portion of the web of polishing material wound on the first roll. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus for supporting a web of polishing material, comprising:
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a platen assembly having a support surface;
a web of polishing material having a first portion disposed across the support surface and a second portion wound on a first roll coupled to the platen assembly; and
a tensioning mechanism coupled to the platen assembly and adapted to tension the web of polishing material in response to a diameter of the second portion of the web of polishing material wound on the first roll, wherein the platen assembly further comprises;
a platen;
a removable top plate disposed on the platen and having at least one vacuum port defined therein; and
a gasket fixed to the top plate and circumscribing the vacuum port, the gasket bounding an evacuatable region defined between the top plate and the web of polishing material. - View Dependent Claims (19)
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20. An apparatus for supporting a web of polishing material, comprising:
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a platen assembly having a support surface;
a web of polishing material having a first portion disposed across the support surface and a second portion wound on a first roll coupled to the platen assembly; and
a tensioning mechanism coupled to the platen assembly and adapted to tension the web of polishing material in response to a diameter of the second portion of the web of polishing material wound on the first roll, wherein the platen assembly further comprises;
a platen; and
a removable top plate disposed on the platen and having at least one vacuum port defined therein;
the vacuum port adapted to evacuate a region defined between the top plate and the web of polishing material and circumscribed by the gasket. - View Dependent Claims (21, 22)
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Specification