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:
Jul. 23, 2019
Filed:
Dec. 14, 2015
Lam Research Corporation, Fremont, CA (US);
John Wiltse, Lake Oswego, OR (US);
Damien Slevin, Salem, OR (US);
LAM RESEARCH CORPORATION, Fremont, CA (US);
Abstract
A face plate of a showerhead assembly of a deposition apparatus in which semiconductor substrates are processed includes gas holes arranged in an asymmetric pattern with a hole density which is substantially uniform or varies across the face plate. The face plate can include a lower wall and an outer wall extending vertically upwardly from an outer periphery of the lower wall. The outer wall is sealed to an outer periphery of a back plate such that an inner plenum is formed between the face plate and the back plate. The gas hole pattern in the face plate avoids symmetry which can cause defects on processed substrates.