Patent ID: 7595224

Claim:
A method for manufacturing an integrated circuit, comprising: a step for forming an apertured part, in which an upper structural layer stack laminated on a substrate is etched to form the apertured part; a step for forming a smooth film, in which a smoothing film that decreases in thickness on a corner part of an aperture edge of the apertured part is deposited on a surface of the upper structural layer stack; a step for enlarging the aperture edge, in which the smoothing film and the upper structural layer stack are both subjected to erosive etching, the corner part that is exposed from the smoothing film is removed, and the aperture edge is expanded; a step for detaching the smoothing film, in which the smoothing film that remains from the etching treatment in the step for enlarging the aperture edge is detached; a step for covering the surface, in which a surface-covering film is applied to the surface of the upper structural layer stack after the step for detaching the smoothing film; a step for forming an etching mask, in which an etching mask is formed on the surface-covering film; and a step for etching the surface-covering film, in which the surface-covering film is etched using the etching mask and removed from the apertured part.