Other

David Casale

Edward Gratrix

Derek Rollins

Michael K Aghajanian

Robert E Klinger

Prashant G Karandikar

William Spitzmacher

A perforated film electrode for a pinned electrostatic chuck that lies below the top surface of the pins in the valleys or interstices between pins, below the elevation of the top surface of the pins, and is attached to the body of the chuck. In one embodiment, the perforated film electrode assembly features a thin film electrode sandwiched between thin sheets of electrically insulating material. The top, outer or exposed surface of the perforated film electrode assembly has a flatness that is maintained within 3 microns. That is, the distance or elevation between the tops of the pins and the top surface of the perforated film unit is maintained within plus or minus 3 microns. A tool for producing a uniform elevation of the top and bottom sheets or layers of electrically insulating material also is taught.

Film electrode for electrostatic chuck

A method for selectively coating the tops of pins of a pin chuck with a high thermal stability material, such as diamond-like carbon (DLC). Non-pin areas ('valleys') of the pin chuck support surface are temporarily covered with glass frit or glass beads during the DLC coating operation. After coating, the glass frit/beads masking material may be removed, leaving the DLC material selectively coating the pin tops. The selective DLC coating avoids the cracking or warping problems due to CTE mismatch when DLC is coated over the entire pin chuck support surface, as the pin chuck material typically is very different from DLC.

Methods for masking a pin chuck, and articles made thereby

Growing community of inventors

Philadelphia, PA, United States of America

David Casale