Patent ID: 6093511
Filing Date: 2000-07-25
Classification: G03F,H01L

Abstract:
A method of manufacturing a semiconductor device, said method comprising the steps of:(a) forming a photosensitive film on a substrate;(b) providing a reticle which has dicing line patterns, a rectangular main area surrounded by said dicing line patterns, focus deviation inspection patterns formed in said dicing line patterns on the peripheries of respective corners of said rectangular main area, and masking patterns which are made of light shielding material, each masking pattern of said masking patterns being formed in said dicing line pattern adjacent to each focus deviation inspection pattern of said focus deviation inspection patterns;(c) positioning said reticle over said photosensitive film;(d) exposing said photosensitive film to transfer said patterns on said reticle to said photosensitive film;(e) stepping said reticle in a next exposure position on said photosensitive film, where at least two focus deviation inspection patterns on said reticle are overlapped with at least two of said transferred masking patterns, respectively;(f) exposing said photosensitive film to transfer said patterns on said reticle to said photosensitive film so that said focus deviation inspection patterns at the two corners of the rectangular main area on said reticle is transferred in an area corresponding to said masking patterns produced in the corners of a previous exposure corresponding to the side of the rectangular main area of the reticle opposite the side of the rectangular main area of the focus deviation patterns being transferred patterns;(g) repeating said steps of (e) and (f), for the remaining portions of the photosensitive film;(h) developing said photosensitive film; and(i) observing shapes of said transferred focus deviation inspection patterns and comparing an extent of change in said shapes with each other to inspect whether deviation in focus is present or not and a magnitude of deviation in focus between adjacent exposures.