Patent ID: 7606020
Filing Date: 2009-10-20
Classification: G03F,H01L

Abstract:
1. A light exposure apparatus for fabricating a substrate of a liquid crystal panel, comprising: a chuck adapted to receive the substrate of the liquid crystal panel on a surface of the chuck; a plurality of first lift pins in the chuck that are able to move up and down to load/unload the substrate on/from the surface of the chuck, the plurality of first lift pins symmetrically arranged in a center portion of the chuck; and a plurality of second lift pins in the chuck to discharge electrostatic charges of the chuck and the substrate, wherein each of the plurality of second lift pins includes a plate contacting the substrate, a supporter supporting and contacting a lower surface of the plate, and an elastic body contacting a lower surface of the supporter to elastically move up and down each of the plurality of second lift pins, and wherein the plate has a first diameter and the supporter has a second diameter smaller than the first diameter, wherein a burden of the plurality of first lift pins is reduced such that the plurality of second lift pins take a part of a weight of the substrate when the substrate is loaded on the chuck and raise the substrate when the substrate is unloaded from the chuck, and wherein an up position of the plurality of first lift pins is higher than an up position of the second lift pins and a down position of the plurality of first lift pins is the same as a down position of the plurality of second lift pins.