期刊
SEVENTH ASIA PACIFIC CONFERENCE ON OPTICS MANUFACTURE (APCOM 2021)
卷 12166, 期 -, 页码 -出版社
SPIE-INT SOC OPTICAL ENGINEERING
DOI: 10.1117/12.2617989
关键词
diamond; dielectric mask; micro-fabrication; faceting effect
资金
- National Natural Science Foundation of China [21727801, 11805127]
- ShanghaiTech Startup Fund
- Fundamental Research Funds for the Central Universities [2019F0201000-10]
- Shanghai Municipal Science and Technology Major Project [2017SHZDZX02]
- Soft Matter Nanolab [SMN180827]
- ShanghaiTech University
The study introduces a new mask system for diamond etching that utilizes SiO2 and Cr layers to improve the etching process and achieve higher aspect ratio than traditional metal masks for diamond elements.
Benefiting from the ultra-broad transparency window, high refractive index and exceptional thermal conductivity, diamond has attracted numerous spotlights on the optical applications and the academic researches. However, the practical deployments of high-quality diamond element were obstructed by the immature manufacture techniques. Here we designed a new mask system for diamond etching that utilizes SiO2 as the main hard mask layer and Cr as the adhesive layer. The cross-section morphology revels three distinct characteristics including a upper slope, a middle vertical sidewall and a trench at the bottom because of the retreat of thick SiO2 mask during the etching process. The completely different etching profile from the previous metal masks has the potential to realize higher aspect ratio etching than traditional metal masks for diamond elements.
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