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:
Jun. 12, 2018
Filed:
May. 16, 2017
Ximan Jiang, San Mateo, CA (US);
Ximan Jiang, San Mateo, CA (US);
Other;
Abstract
A method to improve plasma discharge efficiency by attaching one or more booster chambers to the main discharge chamber is disclosed here. The booster chamber functions as a plasma discharge amplification device for the main discharge chamber. It improves plasma density significantly, especially at pressure below 50 mTorr. Compared with traditional inductively coupled plasma (ICP) source, the strength of the plasma source enhanced with booster chamber has been improved several folds at low pressure conditions. Booster chamber can also be used as a convenient high speed plasma etching and deposition processing chamber for small samples. A method to gauge plasma strength by measuring plasma emission intensity has also been disclosed in this application.