Patent ID: 7456086
Filing Date: 2008-11-25
Classification: H01L

Abstract:
1. A process for manufacturing an integrated circuit on a pre-processed substrate comprising: providing the pre-processed substrate with a structure arranged on the substrate; producing a capping layer on the structure and removing the capping layer in regions where openings are to be formed; removing the structure in the regions where the openings are to be formed; wherein at least one dopant is introduced into the structure, with the concentration of the at least one dopant varying substantially continuously vertically from the surface of the pre-processed semiconductor substrate toward the capping layer and on average increasing or decreasing from the semiconductor substrate vertically toward the capping layer; carrying out at least one dry-etching process; and carrying out at least one subsequent wet-chemical etching process until sidewalls of the openings are formed substantially perpendicular to the surface of the pre-processed substrate.