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:
Oct. 01, 2002
Filed:
Jul. 20, 2001
Taiwan Semiconductor Manufacturing Company, Hsin-Chu, TW;
Abstract
A new method is provided for the creation of an opening over which the second electrode of a MIM capacitor is to be deposited. The first electrode of the MIM is created in a first layer of Fluorine doped Silicon dioxide (SiO ) Glass (FSG) . A layer of insulation comprising silicon nitride is deposited over the surface of the first electrode. A second layer of Fluorine doped Silicon dioxide (SiO ) Glass (FSG) is deposited over the surface of the layer of silicon nitride, an etch stop layer of silicon nitride is deposited over the surface of the second layer of FSG. The layers of etch stop and the second layer of FSG are patterned and etched using a dry etch, stopping on the layer-of insulation and exposing the surface of the layer of insulation. Next-and of critical importance to the invention is a step of photoresist ashing and oxidation of the surface of the layer of silicon nitride. The layer of photoresist can now be removed while concurrently, using a wet strip, the layer of silicon nitride oxidation is removed from the surface of the layer of silicon nitride. The process of creating a MIM capacitor can then proceed by creating the second electrode of the MIM capacitor.