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. 17, 2011
Filed:
Feb. 12, 2008
Masayuki Endo, Osaka, JP;
Masaru Sasago, Osaka, JP;
Masayuki Endo, Osaka, JP;
Masaru Sasago, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
After formation of an underlayer film and an intermediate layer film, a resist pattern formed by the first pattern exposure with the first resist film and the second pattern exposure with the second resist film is transferred to the intermediate layer film. The underlayer film is etched using an intermediate layer pattern as a mask to form an underlayer film pattern. Herein, the first and second resist films are chemically amplified resist films. The second resist film contains a greater amount of additive which improves the sensitivity of the resist or which improves the alkaline solubility of resist exposed part.