Exposure mask

Details Exposure mask Exposure mask

1995-01-24

1996-07-16

Rosasco, S.

Radiation imagery chemistry: process, composition, or product th

Radiation modifying product or process of making

Radiation mask

430321, 430322, 430324, 430394, G03F 900

Patent

active

055366040

ABSTRACT:
An exposure mask according to the invention comprises a light-transmissive substrate, and mask patterns formed on the light-transmissive substrate, and including transparent phase shift patterns and translucent phase shift patterns, each of the translucent phase shift patterns having a phase difference of at least 180.degree. for exposure light corresponding to an optical path difference between a transparent portion of the light-transmissive substrate and a transparent portion of the transparent phase shift pattern, the transparent phase shift patterns and translucent phase shift patterns overlapping with each other, wherein the mask patterns include pattern groups each having a first region consisting of an exposed portion of the light-transmissive substrate, a second region adjacent to the first region, in which only a corresponding one of the translucent phase shift patterns exists, a third region adjacent to the second region, in which a corresponding one of the transparent phase shift patterns is laminated on the corresponding translucent phase shift pattern, and a fourth region adjacent to the third region, in which only the corresponding transparent phase shift pattern exists.

REFERENCES:
patent: 5318868 (1994-06-01), Hasegawa et al.

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