Electricity: electrical systems and devices – Electric charge generating or conducting means – Use of forces of electric charge or field
Reexamination Certificate
2006-12-26
2006-12-26
Mullins, Burton S. (Department: 2836)
Electricity: electrical systems and devices
Electric charge generating or conducting means
Use of forces of electric charge or field
Reexamination Certificate
active
07154731
ABSTRACT:
In one embodiment, an electrostatic chuck includes a body having a top surface facing a wafer and a reflective coating over the top surface. The reflective coating is formed on areas of the top surface that do not contact a wafer so as to not appreciably affect the clamping function of the electrostatic chuck. The reflective coating helps raise the operating temperature of the wafer by reflecting heat radiated from the wafer back onto the wafer. In one embodiment, the reflective coating comprises a material that is relatively good in reflecting radiation in the infrared region.
REFERENCES:
patent: 5841624 (1998-11-01), Xu et al.
patent: 6115232 (2000-09-01), Hass et al.
patent: 6426860 (2002-07-01), Schubert et al.
patent: 6916559 (2005-07-01), Murakawa et al.
Mullins Burton S.
Novellus Systems Inc.
Okamoto & Benedicto LLP
Thomas Lucy
LandOfFree
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