发明授权
US06174801B1 E-beam direct writing to pattern step profiles of dielectric layers applied to fill poly via with poly line, contact with metal line, and metal via with metal line
有权
电子束直接写入用于通过多线填充多孔通孔,与金属线接触的电介质层和金属线的金属通孔的图案阶梯轮廓
- 专利标题: E-beam direct writing to pattern step profiles of dielectric layers applied to fill poly via with poly line, contact with metal line, and metal via with metal line
- 专利标题(中): 电子束直接写入用于通过多线填充多孔通孔,与金属线接触的电介质层和金属线的金属通孔的图案阶梯轮廓
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申请号: US09261997申请日: 1999-03-05
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公开(公告)号: US06174801B1公开(公告)日: 2001-01-16
- 发明人: San-De Tzu , Ching-Shiun Chiu , Chia-Hui Lin
- 申请人: San-De Tzu , Ching-Shiun Chiu , Chia-Hui Lin
- 主分类号: H01L214763
- IPC分类号: H01L214763
摘要:
A method is disclosed for employing direct electron beam writing in the lithography used for forming step-profiles in semiconductor devices. The number of steps in the profiles are not limited. An electron beam sensitive resist is formed over a substrate. The resist is then exposed to a scanning electron beam having precise information, including proximity effect correction data, to directly form stair-case-like openings in the resist. The highly accurately dimensioned step-profiles are then transferred into the underlying layers by performing appropriate etchings. The resulting structures are shown to be especially suitable for forming damascene interconnects for submicron technologies.
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