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:
Aug. 07, 2001
Filed:
Dec. 04, 1998
Akira Nakano, Miyagi-ken, JP;
Sung Chul Kim, Kyongki-Do, JP;
Koichi Fukuda, Miyagi-ken, JP;
Yasuhiko Kasama, Miyagi-ken, JP;
Tadahiro Ohmi, Miyagi-ken, JP;
Shoichi Ono, Miyagi-ken, JP;
ALPS Electric Co., Ltd., Tokyo, JP;
Abstract
A plasma processing apparatus is provided which does not require replacement of a band eliminator according to a frequency used, which is capable of performing chamber cleaning without replacing a resonance circuit, and which is capable of performing plasma cleaning of the inside of the chamber without using a bellows. The plasma processing apparatus includes a resonance circuit (band eliminator) for causing series resonance with a microwave circuit formed of at least a susceptor electrode and a processing chamber in order to trap plasma between a plasma excitation electrode and the susceptor electrode when the surface of a workpiece placed on the susceptor electrode is processed by plasma generated between the plasma excitation electrode and the susceptor electrode, which are provided inside the processing chamber; and for causing parallel resonance with the microwave circuit in order to diffuse plasma inside the processing chamber when performing plasma cleaning.