Patent ID: 8383330

Claim:
A pattern exposure method comprising steps of: continuously conveying a belt-like or sheet-like work having photosensitive layer; and periodically applying proximity exposure for a certain exposure time to said work through a photomask disposed at a predetermined proximity gap from said work and having a mask pattern so that a periodic pattern is formed on said work, said periodic pattern being a periodic arrangement of said mask patterns along a conveying direction of said work, wherein when a length of one period of said periodic pattern is a period length L 0 , a width of said work in a direction perpendicular to said work conveying direction is a work width W 0 , a length in said work conveying direction of a pattern area on which said mask pattern is provided is a pattern length L, a length in a work width direction of said pattern area is a pattern width W, a constant conveying speed of said work is V, an exposure period for exposing said periodic pattern is T, said exposure time is T exp , and a minimum line width of said mask pattern is Dmin, said proximity exposure of said exposure time T exp being applied to an exposure area covering at least one period of said mask pattern in every said exposure period T, under following condition formulae: L 0 <L; W 0 <W; L 0 /V≧T ; and V·T exp <D min.