Radiation imagery chemistry: process – composition – or product th – Radiation modifying product or process of making – Radiation mask
Patent
1998-03-10
2000-04-11
Rosasco, S.
Radiation imagery chemistry: process, composition, or product th
Radiation modifying product or process of making
Radiation mask
G03F 900
Patent
active
060486481
ABSTRACT:
In a mask including an optical shield layer formed on a transparent substrate, the light transmittance of the shield layer is changed in accordance with the density of patterns of the shield layer or the thickness of a photoresist layer on a semiconductor substrate.
REFERENCES:
patent: 5318868 (1994-06-01), Hasegawa et al.
patent: 5490896 (1996-02-01), Yagi et al.
Fujimoto Masashi
Hashimoto Shuichi
NEC Corporation
Rosasco S.
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