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. 02, 2000
Filed:
Apr. 28, 1998
Applicant:
Inventors:
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
438712 ; 438720 ; 438724 ; 438739 ;
Abstract
A method for etching a metal layer on a substrate with dimensional control is disclosed. First, an anti-reflection layer is formed over the metal layer. A photoresist layer is then formed over the anti-reflection layer. A metal layer pattern is defined by patterning the photoresist layer. An etching process is performed to etch the anti-reflection layer with dimensional loss compared with the metal layer pattern, by using the photoresist layer as a mask. Another etching process is performed to etch the metal layer with dimensional gain compared with the anti-reflection layer, by using the anti-reflection layer as a mask. A metal layer with nearly zero-biased dimension is achieved.