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:
Apr. 14, 2020
Filed:
Nov. 15, 2018
Entegris, Inc., Billerica, MA (US);
Sharad N. Yedave, Danbury, CT (US);
Ying Tang, Brookfield, CT (US);
Joseph R. Despres, Middletown, CT (US);
Joseph D. Sweeney, New Milford, CT (US);
ENTEGRIS, INC., Billerica, MA (US);
Abstract
A gas supply assembly is described for delivery of gas to a plasma flood gun which includes an inert gas and a fluorine-containing gas, wherein the assembly is configured to deliver a volume of the fluorine-containing gas to the flood gun that is not greater than 10% of a total volume of the fluorine-containing and inert gasses. The fluorine-containing gas can generate volatile reaction product gases from material deposits in the plasma flood gun, and to effect re-metallization of a plasma generation filament in the plasma flood gun. In combination with the gas amounts, the assembly and methods can use gas flow rates to optimize the cleaning effect and reduce filament material loss from the plasma flood gun during use.