Patent ID: 6136694
Filing Date: 2000-10-24
Classification: G03F,H01L

Abstract:
A method for forming a via hole, comprising the steps of:providing a substrate having a conducting layer;forming an intermetal dielectric layer conformal to the substrate;forming a patterned photoresist as a mask on the intermetal dielectric layer,removing a portion of the intermetal dielectric layer to expose the conducting layer, so as to form an opening and a polymer layer on a surface of the opening;removing the patterned photoresist and a portion of the polymer layer, so that a residual polymer layer remains on the surface of the opening; andcleaning the opening by a wet bench process, which process comprises a post stripper rinse step using a solvent containing N-methyl proidine (NMP), a quick drain rinse step using water, and a final rinse step using water.