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:
Jul. 11, 2000
Filed:
Nov. 13, 1997
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430327 ; 430330 ; 438758 ;
Abstract
A method of manufacturing semiconductor devices includes a coating step for coating a substrate using a resist solution including a base resin and a low-oxygen or oxygen-free solvent in which oxygen is removed by nitrogen bubbling, a heating step for heating the substrate coated with the resist, an exposing step for exposing the substrate with radiation to transfer a pattern, and a developing step for developing the exposed substrate. The coating step, the heating step, the exposing step and the developing step are performed under an environment controlled in a low-oxygen or oxygen-free state.