Patent ID: 7777860
Filing Date: 2010-08-17
Classification: G03F

Abstract:
1. An exposure apparatus for a flat panel display device, comprising: a light source; a stage having a horizontal support surface for disposing a substrate thereupon; a mask vertically arranged with respect to the horizontal support surface and including a front surface, a rear surface and first to fourth side surfaces, wherein the first and second side surfaces horizontally face each other and the third and fourth side surfaces vertically face each other; a frame covering top and bottom edges of the front and rear surfaces of the mask, such that the first side surface between the top edge of the front surface and the top edge of the rear surface, and the second side surface, which is opposite to the first side surface, between the bottom edge of the front surface and the bottom edge of the rear surface are covered, and such that side edges of the front and rear surfaces and the third and fourth side surfaces of the mask are exposed; and an optical system between the light source and the stage and including an objective lens unit, which includes one prism and at least two lenses, the optical system for controlling a direction of light from the light source through the mask to irradiate the light onto the stage.