Presentation 1998/7/24
Thin Resist Approximation Model for Optical Proximity Correction
Chang-Nam Ahn, Hee-Bom Kim, Young-Mog Ham, Yung-Mo Koo, Ki-Ho Baik,
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Abstract(in English) Optical proximity correction technique has been studied. The occurrence of proximity effect in the optical lithography is composed of an element caused by diffraction of light, which can be explained by aerial image simulation, and an element caused by resist process, in which acid diffusion is a major factor causing non-linearity.In the case of very thin resist, absorbed energy that generates the acid can be described by two-dimensional instead of three-dimensional distribution.Under this simple assumption, acid diffusion by post exposure bake is equivalent to the diffusion of aerial image, and chemical amplification can be analytically described also. Modified aerial image including diffusion and chemical amplification, we call it diffused aerial image, can give the information for patterning status directly.Therefore, diffused aerial image model can explain experimental results very well compared to the expectation by using aerial image only without loss of simplicity and calculation speed.
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Keyword(in English) optical proximity correction / acid diffusion / aerial image / diffused aerial image
Paper # SDM98-98,ICD98-97
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Conference Information
Committee SDM
Conference Date 1998/7/24(1days)
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Registration To Silicon Device and Materials (SDM)
Language ENG
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Thin Resist Approximation Model for Optical Proximity Correction
Sub Title (in English)
Keyword(1) optical proximity correction
Keyword(2) acid diffusion
Keyword(3) aerial image
Keyword(4) diffused aerial image
1st Author's Name Chang-Nam Ahn
1st Author's Affiliation Semiconductor Research Div., Hyundai Electronics Industries Co., Ltd.,()
2nd Author's Name Hee-Bom Kim
2nd Author's Affiliation Semiconductor Research Div., Hyundai Electronics Industries Co., Ltd.,
3rd Author's Name Young-Mog Ham
3rd Author's Affiliation Semiconductor Research Div., Hyundai Electronics Industries Co., Ltd.,
4th Author's Name Yung-Mo Koo
4th Author's Affiliation Semiconductor Research Div., Hyundai Electronics Industries Co., Ltd.,
5th Author's Name Ki-Ho Baik
5th Author's Affiliation Semiconductor Research Div., Hyundai Electronics Industries Co., Ltd.,
Date 1998/7/24
Paper # SDM98-98,ICD98-97
Volume (vol) vol.98
Number (no) 194
Page pp.pp.-
#Pages 8
Date of Issue