Photo mask and method for forming pattern using the same
First Claim
1. A photo mask, comprising:
- a transparent substrate which transmits exposure light;
a light shielding film formed on the transparent substrate;
a first opening portion formed in the light shielding film;
a first auxiliary opening portion provided in the light shielding film and located adjacent to the first opening portion;
a second auxiliary opening portion provided in the light shielding film and located adjacent to the first auxiliary opening portion at an opposite side to the first opening portion; and
a second opening portion provided in the light shielding film and located adjacent to the first opening portion at an opposite side to the first auxiliary opening portion,whereinan opening width of the first opening portion is a width with which a transcription pattern is formed on a target member to be exposed with the transmitted exposure light, and is a dimension of 0.8×
(λ
/NA)×
M or less (where λ
is a wavelength of the exposure light, and NA and M are a numerical aperture and a reduction ratio of a reduced projection optical system of an exposure apparatus),each of the first auxiliary opening portion and the second auxiliary opening portion has an opening width with which the transcription pattern is not formed on the target member to be exposed by the transmitted exposure light, and transmits the exposure light to generate diffracted light, anda first distance between a center of the first opening portion and a center of the first auxiliary opening portion is greater than a second distance between the center of the first auxiliary opening portion and a center of the second auxiliary opening portion.
4 Assignments
0 Petitions
Accused Products
Abstract
An opening width of a main pattern is a width with which a transcription pattern is formed on a target member to be exposed by transmitted exposure light, and is a dimension of 0.8×(λ/NA)×M or less (where λ is a wavelength of the exposure light, and NA and M are a numerical aperture and a reduction ratio of a reduced projection optical system of an exposure apparatus). Each of a first auxiliary pattern adjacent to the main pattern and a second auxiliary pattern located outside the first auxiliary pattern to be adjacent thereto has a width with which a transcription pattern is not formed by the exposure light and generates diffracted light. A first distance between respective centers of the main pattern and the first auxiliary pattern is greater than a second distance between respective centers of the first auxiliary pattern and the second auxiliary pattern.
17 Citations
16 Claims
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1. A photo mask, comprising:
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a transparent substrate which transmits exposure light; a light shielding film formed on the transparent substrate; a first opening portion formed in the light shielding film; a first auxiliary opening portion provided in the light shielding film and located adjacent to the first opening portion; a second auxiliary opening portion provided in the light shielding film and located adjacent to the first auxiliary opening portion at an opposite side to the first opening portion; and a second opening portion provided in the light shielding film and located adjacent to the first opening portion at an opposite side to the first auxiliary opening portion, wherein an opening width of the first opening portion is a width with which a transcription pattern is formed on a target member to be exposed with the transmitted exposure light, and is a dimension of 0.8×
(λ
/NA)×
M or less (where λ
is a wavelength of the exposure light, and NA and M are a numerical aperture and a reduction ratio of a reduced projection optical system of an exposure apparatus),each of the first auxiliary opening portion and the second auxiliary opening portion has an opening width with which the transcription pattern is not formed on the target member to be exposed by the transmitted exposure light, and transmits the exposure light to generate diffracted light, and a first distance between a center of the first opening portion and a center of the first auxiliary opening portion is greater than a second distance between the center of the first auxiliary opening portion and a center of the second auxiliary opening portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification