Patent ID: 6821711
Filing Date: 2004-11-23
Classification: G03F

Abstract:
A manufacturing method of a semiconductor device having a step of making a resist pattern through exposure using a phase-shift mask;seeking the relationship of optical conditions of an exposure optical system used for exposure and a mask structure of said phase-shift mask with displacement of a pattern to be transferred by exposure; finding said optical conditions and said mask structure that can limit displacement of said pattern within a required range of etching error, taking manufacturing errors of the mask into consideration; examining the optical conditions and the mask structure obtained to determine whether they ensure a required exposure tolerance and a required focal depth; and when the result of the examination is acceptable, fixing said exposure optical system to the optical conditions selected, then actually manufacturing said phase-shift mask having the mask structure selected, and conducting exposure using said exposure optical system and said phase-shift mask such that displacement of said pattern is limited within said range of etching error; wherein said optical conditions include, at least, a numerical aperture and a partial coherence factor; and said mask structure is regulated by the amount of excavation of a substrate or by the thickness of a phase shifter.