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:
Oct. 14, 2025
Filed:
Jul. 24, 2023
Hitachi High-tech Corporation, Tokyo, JP;
Hitoshi Tamura, Tokyo, JP;
Norihiko Ikeda, Tokyo, JP;
Hitachi High-Tech Corporation, Tokyo, JP;
Abstract
A plasma processing apparatus including a processing chamber including therein a sample stage on which a substrate to be processed is placed; a magnetic field generating unit configured to generate a magnetic field inside the processing chamber; a microwave power source configured to generate microwave power; microwave power transfer units configured to transfer the microwave power; and a microwave three-dimensional circuit unit configured to supply the transferred microwave power into a processing chamber via a dielectric window. The microwave three-dimensional circuit unit includes a branch circuit configured to branch the microwave power transferred by the microwave power transfer unit in a plurality of azimuth directions, a ring resonator configured to resonate the microwave power branched in the plurality of azimuth directions by the branch circuit, and a coaxial line configured to supply the microwave power resonated by the ring resonator into the processing chamber via the dielectric window.