Beilstein J. Nanotechnol.2017,8, 784–788, doi:10.3762/bjnano.8.81
reduction of the surface roughness was observed as compared to the 325 nm light. These results indicate that even wavelengths above 325 nm can cause surface roughness improvements without notably changing the structure of the photoresist.
Keywords: near-field etching; organic photoresists; surface
improvement; wavelength dependence; Introduction
As the structures fabricated in the field of semiconductors has reached below 10 nm [1], and the pursuit of ever smaller node sizes continues, the impact of the surface roughness (SR) becomes increasingly critical [2]. In attempts to downscale the minimum
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Figure 1:
AFM images of the photoresist after 120 min of near-field etching with a He–Cd laser (325 nm, 3.81 ...