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:
Mar. 13, 1990
Filed:
Apr. 28, 1989
Satoshi Kagatsume, Nirasaki, JP;
Kazuo Fukasawa, Kofu, JP;
Tokyo Electron Limited, Tokyo, JP;
Abstract
An etching device comprising a housing in which etching process is carried out, an electrode system having lower and upper electrodes opposed to each other used to generate plasma between these electrodes, while a semiconductor wafer is being placed on the lower electrode, a lifter system to move the lower electrode up and down, a high-frequency power source for applying current between these electrodes, a holder member located between the lower and upper electrodes to hold the wafer at a certain position between these electrodes, and a gas supply means for supplying reaction gases used to generate plasma, between the lower and upper electrodes.