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:
May. 07, 2019
Filed:
Jul. 10, 2017
Applied Materials, Inc., Santa Clara, CA (US);
Anurag Kumar Mishra, Fremont, CA (US);
James Rogers, Los Gatos, CA (US);
John Poulose, Sunnyvale, CA (US);
APPLIED MATERIALS, INC., Santa Clara, CA (US);
Abstract
Apparatuses and methods are provided that, in some embodiments use an adjustable middle coil to tune plasma density in a plasma processing system. For example, in one embodiment, a plasma processing apparatus includes an impedance match circuit coupled to an Rf power source. The impedance match circuit measures voltage and current at an inner and an outer coil. The match circuit calculates plasma density from the measured voltage and/or current. An adjustable middle coil located between the inner and outer coils is adjusted and/or replaced to tune the plasma density radial profile.