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. 05, 1992
Filed:
Feb. 20, 1991
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; B44C / ; C23F / ;
U.S. Cl.
CPC ...
156643 ; 118730 ; 118 501 ; 118620 ; 156646 ; 156656 ; 156657 ; 1566591 ; 156662 ; 156345 ; 20419237 ; 20429836 ; 427 38 ;
Abstract
Anisotropic etching can be obtained in the direction of the incident heated beam of reactive gas with the introduction of a second material for controlling reactivity.
Published as: