Patent ID: 6522389
Filing Date: 2003-02-18
Classification: G03F

Abstract:
A scanning exposure system to expose an objective wafer, the system comprising:a light source; a slit plate with a slit-shaped window in optical alignment with said light source and having a length in a first direction greater than a width in a second direction, the second direction being perpendicular to the first direction; a photomask spaced apart from said slit plate with said slit-shaped window and having plural line-shaped exposure openings therein, said line-shaped exposure openings having a length along a longer direction greater than a width along a narrower direction perpendicular to said longer direction, said longer direction being aligned parallel to a projection of said first direction on said photomask, the objective wafer being exposed to said light source through said slit-shaped window and said exposure openings during a scanning operation by a relative motion of said photomask with respect to said slit-shaped window in a second direction perpendicular to said first direction, wherein the light source, the slit-shaped window, and the line-shaped exposure openings of the photomask are aligned so that scanning of the objective wafer is conducted with the longitudinal direction of the slit light parallel to the longitudinal direction of the line-shaped exposure openings, wherein all the exposure openings having a length along said longer first direction greater than a width along said narrower second direction, said longer first direction for each of said plurality of exposure openings being aligned parallel to said projection of said first direction on said photomask, and said all exposure openings being adjacently aligned with each other in said second direction.