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:
Dec. 09, 2025
Filed:
Jan. 26, 2022
Advanced Micro-fabrication Equipment Inc. China, Shanghai, CN;
Yichuan Zhang, Shanghai, CN;
Rubin Ye, Shanghai, CN;
ADVANCED MICRO-FABRICATION EQUIPMENT INC. CHINA, Shanghai, CN;
Abstract
The present disclosure provides a lower electrode assembly and a plasma processing device in which the lower electrode assembly is located. The lower electrode assembly includes a base, including a main part and a step part extending outwardly from the main part, the step part being provided with a screw hole; a dielectric ring, disposed on the step part around the main part, a groove being formed in a bottom of the dielectric ring, and an opening of the groove being able to cover an opening of the screw hole; and a screw, having a head being located in the groove. By forming the groove inside the dielectric ring at an outer edge of the base, the head of the screw fixing the base is arranged in the groove so as to reduce a diameter of the hole formed in the base, so that an edge of the screw hole can be completely covered by the dielectric ring, and since the dielectric ring is made of an insulating material, a technical effect of avoiding arcing at the edge of the screw hole can be achieved.