화학공학소재연구정보센터
Journal of Vacuum Science & Technology B, Vol.21, No.1, 204-206, 2003
Direct writing of photomask by ultrashort laser
Photomasks are currently fabricated using the lithographic process, which is complex and time consuming because of several steps involved in the fabrication process. In order to address this a simple technique is proposed in this article which is a single-step process. The required pattern is transferred to mask blank by direct writing with ultrashort laser pulses without the aid of photoresist. A nonmechanical scanning system immune to effects of vibration has been developed in order to scan the laser beam with high positional accuracy and scan speed. It is a cost effective technique when compared with the lithographic process and is capable of fabricating photomasks with submicron features. (C) 2003 American Vacuum Society.