Sub-50 nm feature sizes using positive tone molecular glass resists for EUV lithography
作者:Seung Wook Chang、Ramakrishnan Ayothi、Daniel Bratton、Da Yang、Nelson Felix、Heidi B. Cao、Hai Deng、Christopher K. Ober
DOI:10.1039/b514065j
日期:——
Extreme ultra violet (EUV) lithography is one of the most promising next generation lithographic techniques for the production of sub-50 nm feature sizes with applications in the semiconductor industry. Coupling this technique with molecular glass resists is an effective strategy for high resolution lithographic patterning. In this study, a series of tert-butyloxycarbonyl (t-Boc) protected C-4-hydroxyphenyl-calix[4]resorcinarenes derivatives were synthesized and evaluated as positive tone molecular glass resists for EUV lithography. The amorphous nature of these molecules was confirmed using thermal analysis, FTIR and powder X-ray diffraction. Feature sizes as small as 30 nm with low line edge roughness (4.5 nm, 3σ) were obtained after patterning and development.
极紫外(EUV)光刻技术是最有前途的下一代光刻技术之一,可用于生产 50 纳米以下的特征尺寸,并可应用于半导体行业。将这一技术与分子玻璃抗蚀剂相结合,是实现高分辨率光刻图案化的有效策略。在本研究中,合成了一系列叔丁氧羰基(t-Boc)保护的 C-4-hydroxyphenyl-calix[4]resorcinarenes 衍生物,并将其作为正色调分子玻璃抗蚀剂进行了评估,以用于 EUV 光刻技术。热分析、傅立叶变换红外光谱和粉末 X 射线衍射证实了这些分子的无定形性质。在图案化和显影后,可获得小至 30 纳米的特征尺寸和较低的线边缘粗糙度(4.5 纳米,3σ)。