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:
Nov. 18, 2025
Filed:
Mar. 15, 2024
Tokyo Electron Limited, Tokyo, JP;
Gen Tamamushi, Miyagi, JP;
TOKYO ELECTRON LIMITED, Tokyo, JP;
Abstract
In a plasma processing apparatus, electrical bias energy is provided from a bias power supply to a substrate support. Source radio-frequency power is provided from a radio-frequency power supply to a radio-frequency electrode through a feed line. A phase period having a minimum value of a power level of a reflected wave of the source radio-frequency power is identified from a plurality of phase periods in a bias cycle of the electrical bias energy. A reference value being a phase difference between a voltage and a current on the feed line in the identified phase period is determined. A source frequency of the source radio-frequency power is controlled for each phase period based on a result of comparison between the reference value and the phase difference between the voltage and the current on the feed line in a corresponding phase period of the plurality of phase periods.