Photoresist shrinkage observation by a metrological tilting-AFM
Photoresist shrinkage observation by a metrological tilting-AFM
复制标题
通过计量倾斜 AFM 观察光刻胶收缩
DOI:
10.1117/12.2655566
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Gonda Satoshi
中科院分区:
文献类型:
--
作者:
Kizu Ryosuke;Misumi Ichiko;Hirai Akiko;Gonda Satoshi
Scanning electron microscopy (SEM) is commonly used for line edge roughness (LER) measurement; however, it is difficult to achieve high-precision LER measurement of photoresists because exposure to an electron beam (EB) causes shrinkage of the materials. The differences in the 3D sidewall shape before and after shrinkage have not been investigated in detail. In this study, EB-induced photoresist shrinkage was observed by employing the atomic force microscopy with tip-tilting technique (tilting-AFM), which enables high-precision observation of the vertical sidewall of the pattern. In the experiment, the shrinkage deformation was observed by measuring the same photoresist pattern with the tilting-AFM before and after EB exposure (by SEM observation) on the pattern. The results show that the sidewall was smoothed by EB exposure. Further, the tendency of changes in LER (roughness parameters) was observed. This measurement technique can be used to better understand photoresist materials and to improve the LER measurement by SEM.
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作者:
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DOI:
10.1117/1.jmm.20.2.024901
发表时间:
2021
期刊:
Journal of Micro/Nanopatterning, Materials, and Metrology
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发表时间:
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期刊:
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