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. 31, 2009
Filed:
Nov. 30, 2006
Hong MA, Singapore, SG;
Hong Ma, Singapore, SG;
United Microelectronics Corp., Science-Based Industrial Park, Hsin-Chu, TW;
Abstract
A method for fabricating a dual damascene structure contains providing a substrate having a conductive layer, an etching stop layer, a dielectric layer, and a photoresist layer thereon, performing an etching process to remove a portion of the dielectric layer through a via pattern of the photoresist layer for forming a via structure in the dielectric layer, providing CO-containing gas to perform an ash process, filling GFP materials into the via structure, forming a photoresist layer with a trench pattern on the substrate, etching the dielectric layer through the trench pattern to form a trench structure in the dielectric layer, above the via structure, and removing the etching stop layer exposed in the via structure.