Chinese Optics Letters, 2019, 17 (9): 093102, Published Online: Jul. 29, 2019
Te-free SbBi thin film as a laser heat-mode photoresist Download: 842次
Abstract
A Te-free binary phase change material SbBi is proposed as a new inorganic photoresist for heat-mode lithography. It shows good film-forming ability (surface roughness <1 nm), low threshold power for crystallization (2 mW), and high etching selectivity (15:1). Line-type, dot-type, and complex pattern structures with the smallest feature size of 275 nm are fabricated on SbBi thin films using a 405 nm diode laser direct writing system. In addition, the excellent grating structures with a period of 0.8 μm demonstrate that thermal interference does not affect the adjacent microstructures obviously. These results indicate that SbBi is a promising laser heat-mode resist material for micro/nanostructure fabrication.
Kui Zhang, Zhengwei Wang, Guodong Chen, Yang Wang, Aijun Zeng, Jing Zhu, Syarhei Avakaw, Heorgi Tsikhanchuk. Te-free SbBi thin film as a laser heat-mode photoresist[J]. Chinese Optics Letters, 2019, 17(9): 093102.