Negative-tone chemically-amplified resist development for high resolution hybrid lithography
Experimental negative-tone chemically-amplified resist formulations have been designed to reach sub-30 nm resolution in electron-beam lithography. With these formulations based on Sumitomo NEB-33 commercial platform resist, we achieved 20 nm isolated line resolution thanks to process optimization. Optical 248 nm exposures, were performed as well, leading to patterns with high side-walls roughness.
ebeam lithography chemical amplified resist ultra high resolution lithography