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:
May. 23, 2000
Filed:
Jul. 22, 1998
Satoshi Takaki, Komae, JP;
Atsushi Yamagami, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In order to effect a plasma process at a high rate, such as formation of a high-quality deposit film having very uniform thickness and quality over a large-area substrate, (1) an oscillation frequency of an RF generator is used in the range of 30 to 600 MHz, (2) a matching circuit and a cathode electrode are connected through a transmission line and RF power is supplied through the transmission line, (3) the cathode electrode is of an electrically conductive structure of a rod shape and at a connection part between the cathode electrode and an inner conductor of the transmission line, an external shape of a cross section of the cathode electrode is the same as an external shape of a cross section of the inner conductor, and (4) at least the connection part between the cathode electrode and the inner conductor of the transmission line is covered by a dielectric member having the same external shape as an external shape of a transmission medium in the cross section of the transmission line.