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. 09, 2010
Filed:
Apr. 11, 2007
Keun Kyu Kong, Icheon-si, KR;
Keun Kyu Kong, Icheon-si, KR;
Hynix Semiconductor Inc., Icheon-si, KR;
Abstract
A method for forming a fine pattern of a semiconductor device overcomes resolution limits of exposure equipment. The method includes forming a first photoresist pattern over an underlying layer formed over a semiconductor substrate. An amorphous carbon film and a second photoresist film are sequentially deposited over the first photoresist pattern. The second photoresist film and the amorphous carbon film are planarized to expose the first photoresist pattern. A thick portion and a thin portion of the amorphous carbon film is formed. The first photoresist pattern and the second photoresist film are removed. Etching is performed on the thin portion of the amorphous carbon film and the underlying layer using the thick portion of the amorphous carbon film as an etch mask. The thick portion of the amorphous carbon film is removed to expose a fine pattern of the underlying layer.