Mr. Jin-Woong Jeong Profile

Jin-Woong Jeong

Field Application Engineer at ASML Korea Co Ltd

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Proceedings Article | 4 October 2016 Paper

Comparative study on PS material of EAPSM for flat panel display

Jin-Woong Jeong, Jin-Han Song, Ho-Jin Lee, Kyu-Sik Kim, Woo-Gun Jeong, Young-Jin Yoon, Sang-Pil Yun, Sung-Mo Jung

Proceedings Volume 9985, 998512 (2016) https://doi.org/10.1117/12.2241325

KEYWORDS: Photomasks, Chromium, Optical properties, Phase shifts, Transmittance, Etching, Reflectivity, Absorbance, Nanoimprint lithography, Electroactive polymers

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We evaluated and compared the i-line 5.2 % Cr based EAPSM and i-line 5.2 % MoSi based EAPSM to find more appropriate material of shifter for FPD. The evaluation items were their CD linearity, phase shift, and optical properties such as transmittance, reflectance, and absorbance under the wavelength range 200-800 nm. Finally, from the results, we performed simulations. The CD linearity and the phase shift were seen as the performances of the same level within all their specifications. The optical properties indicated that the transmittance was higher in the i-line 5.2 % Cr based EAPSM than in i-line 5.2 % MoSi based EAPSM from about 350 nm wavelength, and the reflectance was lower in the iline 5.2 % Cr based EAPSM than in i-line 5.2 % MoSi based EAPSM under the entire wavelength region. From these results, NILS and contrast were simulated between them in 5.0 μm pitch LS pattern and it was found that they did not have a significant difference. Side-lobe effect appeared in both EAPSMs when clear features were closely adjacent under 2.0 μm contact pattern. However, the side-lobe could be removed effectively by adopting Rim type EAPSM. The i-line 5.2 % MoSi based EAPSM may be more suitable for the Rim type EAPSM than the i-line 5.2 % Cr based EAPSM considering their structure and production process of the Rim type EAPSM. It may be appropriate that we use the i-line 5.2 % Cr based EAPSM in LS pattern and the i-line 5.2 % MoSi based EAPSM in contact pattern, because they were almost same level in that performance perspective.

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