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:
Nov. 28, 2006
Filed:
Jul. 23, 1999
Applicant:
Jyoti Kiron Bhardwaj, Bristol, GB;
Inventor:
Jyoti Kiron Bhardwaj, Bristol, GB;
Assignee:
Surface Technology Systems PLC, Gwent, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 21/461 (2006.01); H01L 21/302 (2006.01);
U.S. Cl.
CPC ...
Abstract
There is disclosed a method of treating a substrate material or a film present on the material surface comprising cyclically performing the following steps: (a) etching the material or film; (b) depositing or forming a passivation layer on the surfaces of an etched feature; and (c) selectively removing the passivation layer from the etched feature in order that the etching proceeds in a direction substantially perpendicular to the material or film surface. At least one of the steps (a) or (b) is performed in the absence of a plasma. Also disclosed is an apparatus for performing the method.