Patent ID: 6146794
Filing Date: 2000-11-14
Classification: G03F,H01J,Y10S

Abstract:
An antistatic method for a photomask including a conductive optical shield layer, comprising the steps of:inserting at least two conductive pins into said photomask so that said conductive pins are in contact with said conductive optical shield layer;setting said photomask in a cassette of an electron beam exposure apparatus after said conductive pins are inserted into said photomask;electrically connecting said conductive pins to said cassette by conductive plates so that electrons charged at said conductive optical shield layer by electron beams are effectively discharged from said conductive pins to said cassette; andmonitoring whether or not said conductive pins are in contact with said conductive optical shield layer by whether or not a resistance between said conductive pins is lower than a predetermined value.