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:
Aug. 10, 1999
Filed:
Mar. 31, 1998
Mark A Kennard, Pleasanton, CA (US);
Lam Research Corporation, Fremont, CA (US);
Abstract
A method for etching a trench in a monocrystal silicon layer. The method includes providing a plasma processing system having a plasma processing chamber. The plasma processing system has a variable plasma generation source and a variable ion energy source with the variable plasma generation source being configured to be controlled independently of the variable ion energy source. The method further includes flowing an etchant source gas that includes O.sub.2, helium, and at least one of SF.sub.6 and NF.sub.3 into the plasma processing chamber. There is also included energizing both the variable plasma generation source and the variable ion energy source to form a plasma from the etchant source gas. Additionally, there is included employing the plasma to etch the trench.