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. 08, 1994
Filed:
Apr. 08, 1993
Applicant:
Inventor:
Masahiro Yoneda, Itami, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
156643 ; 156345 ; 118728 ; 1187 / ; 20419213 ; 20419232 ; 20429815 ;
Abstract
A fine pattern forming apparatus includes a stage and an opposed electrode at least one of which is made of a magnetic material. A magnetic field is applied to this stage or opposed electrode to provide a predetermined gap between the stage and the opposed electrode for a fine pattern formation. In consequence, optimum etching conditions (including etching uniformity, etch rate and etching direction) can be assured without generating dust. As a result, damage caused by the plasma can be reduced, and the etch rate can be increased.