The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 04, 2008
Filed:
Sep. 10, 2004
Applicants:
Richard E. Pingree, Jr., New Market, MD (US);
Michael Bruce Colson, Woodbine, MD (US);
Michael Silbert, Sykesville, MD (US);
Inventors:
Richard E. Pingree, Jr., New Market, MD (US);
Michael Bruce Colson, Woodbine, MD (US);
Michael Silbert, Sykesville, MD (US);
Assignee:
Axcelis Technologies, Inc., Beverly, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C 16/00 (2006.01); C23F 1/00 (2006.01); H01L 21/306 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process and apparatus for cooling a plasma tube generally includes flowing a hydrocarbon dielectric heat transfer fluid into a space defined by the plasma tube and a concentric tube surrounding the plasma tube. In one embodiment, the hydrocarbon fluid is selected to have a dissipation factor less than 0.002 and a thermal efficiency coefficient greater than or equal to 1.30 kJ/kg*K.