Patent ID: 7514365
Filing Date: 2009-04-07
Classification: H01L

Abstract:
1. A method of manufacturing an opening, comprising the steps of: forming a dielectric layer over a conductive layer; forming a patterned mask layer on the dielectric layer, wherein the patterned mask layer exposes a portion of the dielectric layer which is predetermined to form a trench in; performing a treatment process on the exposed portion of the dielectric layer to form a film, wherein the film protects the dielectric layer from running off a plurality of composition components; forming a patterned photoresist layer on the patterned mask layer and the film, wherein the patterned photoresist layer exposes a portion of the film and the mask layer which is predetermined to form a via in; removing a portion of the dielectric layer by using the patterned photoresist layer as a mask to form a first via; removing the patterned photoresist layer; and removing a portion of the dielectric layer by using the patterned mask layer as a mask to form a trench and to convert the first via to a second via, wherein the trench is located over the second via.