发明授权
- 专利标题: Method of preparing optically imaged high performance photomasks
- 专利标题(中): 制备光学成像的高性能光掩模的方法
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申请号: US09912116申请日: 2001-07-23
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公开(公告)号: US06703169B2公开(公告)日: 2004-03-09
- 发明人: Scott Fuller , Melvin W. Montgomery , Jeffrey A. Albelo , Alex Buxbaum
- 申请人: Scott Fuller , Melvin W. Montgomery , Jeffrey A. Albelo , Alex Buxbaum
- 主分类号: G03F900
- IPC分类号: G03F900
摘要:
One principal embodiment of the disclosure pertains to a method of optically fabricating a photomask using a direct write continuous wave laser, comprising a series of steps including: applying an organic antireflection coating over a surface of a photomask which includes a chrome-containing layer; applying a chemically-amplified DUV photoresist over the organic antireflection coating; post apply baking the DUV photoresist over a specific temperature range; exposing a surface of the DUV photoresist to the direct write continuous wave laser; and, post exposure baking the imaged DUV photoresist over a specific temperature range. The direct write continuous wave laser preferably operates at a wavelength of 244 nm or 257 nm. In an alternative embodiment, the organic antireflection coating may be applied over an inorganic antireflection coating which overlies the chrome containing layer.
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