Patent ID: 6303488
Filing Date: 2001-10-16
Classification: H01L,Y10S

Abstract:
A semiconductor processing method comprising:forming a first material from which photoresist cannot be substantially selectively removed over a substrate;forming a plurality of layers over the first material, at least two of the layers being different from one another and comprising materials from which photoresist can be selectively removed, an uppermost of the at least two layers being a first layer and another of the at least two layers being a second layer;depositing photoresist over the plurality of layers and forming an opening within the photoresist to the first layer;first etching through the first layer within the photoresist opening to expose the second layer and accordingly pattern the first layer into a mask over the second layer, the first etching, not exposing the first material;after the first etching, stripping the photoresist from the substrate to leave the first layer mask as the uppermost mask over the second layer; andafter the stripping, second etching the second layer while utilizing the is first layer mask to pattern the second layer, the second etching first exposing the first material.