Effects of Protecting Group on Resist Characteristics of Acryl Polymers for 193 nm Lithography

Toshiyuki Ogata, Shogo Matsumaru, Hiroaki Shimizu, Naotaka Kubota, Hideo Hada, Masamitsu Shirai

Journal of Photopolymer Science and Technology · 2004 · 17 citations · 11 references

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Abstract

We have investigated effects of alkoxy-methyl ester as acid labile protecting group on resists characteristics of acryl polymers for the designing of chemical amplification positive-tone resist system. Preparing 2-adamantyloxy methyl methacrylate (AdOMMA) copolymers and resists consisted of these polymer, we have evaluated copolymers properties, exposure sensitivities, resolution, and line edge roughness (LER). AdOMMA copolymers showed a good pattern profile and high resolution. In addition, as compared with 2-methyl-2-admantyl methacrylate (MAdMA) copolymers, AdOMMA copolymers displayed a good LER of 130 nm resist lines, and the observed LER values were 7.6 nm and 5.6 nm, respectively.

References

11