Electrostatic chuck device
First Claim
1. A unipolar type electrostatic chuck device for fixing a substrate, said electrostatic chuck device comprising:
- a metal electrode having a plurality of embossed projections on its top surface, dielectric layers formed only on top surfaces of said plurality of embossed projections, an insulator covering said metal electrode except at the top surface of said metal electrode, and a DC power source connected to said metal electrode.
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Accused Products
Abstract
An electrostatic chuck device provided with a dielectric plate with a surface embossed to give it a plurality of projections, an electrode, and an external power source, wherein substrate supporting surfaces of the plurality of projections are covered by conductor wiring and the conductor wiring electrically connects the substrate supporting surfaces of the plurality of projections. At the time of substrate processing, when the embossed projections contact the back of the substrate, the back of the substrate and the conductor wiring is made the same in potential due to the migration of the charges, the generation of force between the back of the substrate and the conductor wiring being in contact with the same is prevented, and a rubbing state between the two is prevented. Due to this, the electrostatic chuck device reduces the generation of particles, easily and stably removes and conveys substrates, and realizes a high yield and system operating rate.
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Citations
12 Claims
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1. A unipolar type electrostatic chuck device for fixing a substrate, said electrostatic chuck device comprising:
a metal electrode having a plurality of embossed projections on its top surface, dielectric layers formed only on top surfaces of said plurality of embossed projections, an insulator covering said metal electrode except at the top surface of said metal electrode, and a DC power source connected to said metal electrode. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A bipolar type electrostatic chuck device for fixing a substrate, said electrostatic chuck device comprising:
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two metal electrodes having pluralities of embossed projections on their top surfaces and electrically insulated from each other, dielectric layers formed only on top surfaces of said pluralities of embossed projections, an insulator covering said metal electrodes except at the top surfaces of said metal electrodes, and two DC power sources connected to said two metal electrodes in separated states. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification