Dry Etching of Germanium with Laser Induced Reactive Micro Plasma
Dry Etching of Germanium with Laser Induced Reactive Micro Plasma
复制标题
激光诱导反应微等离子体干法蚀刻锗
DOI:
10.1007/s40516-021-00147-1
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发表时间:
2021
影响因子:
--
通讯作者:
Jens Bauer
中科院分区:
文献类型:
--
作者:
Martin Ehrhardt;Pierre Lorenz;Jens Bauer
High-quality, ultra-precise processing of surfaces is of high importance for high-tech industry and requires a good depth control of processing, a low roughness of the machined surface and as little as possible surface and subsurface damage but cannot be realized by laser ablation processes. Contrary, electron/ion beam, plasma processes and dry etching are utilized in microelectronics, optics and photonics. Here, we have demonstrated a laser-induced plasma (LIP) etching of single crystalline germanium by an optically pumped reactive plasma, resulting in high quality etching. A Ti:Sapphire laser (λ = 775 nm, EPulse/max.= 1 mJ, t = 150 fs, frep.= 1 kHz) has been used, after focusing with a 60 mm lens, for igniting a temporary plasma in a CF4/O2gas at near atmospheric pressure. Typical etching rate of approximately ~ 100 nm / min and a surface roughness of less than 11 nm rms were found. The etching results were studied in dependence on laser pulse energy, etching time, and plasma – surface distance. The mechanism of the etching process is expected to be of chemical nature by the formation of volatile products from the chemical reaction of laser plasma activated species with the germanium surface. This proposed laser etching process can provide new processing capabilities of materials for ultra—high precision laser machining of semiconducting materials as can applied for infrared optics machining.
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影响因子:
4.1
作者:
K. Shim;Y. Kil;Hyeon Deok Yang;B. K. Park;J.H. Yang;Sukill Kang;T. Jeong;T. Kim
通讯作者:
K. Shim;Y. Kil;Hyeon Deok Yang;B. K. Park;J.H. Yang;Sukill Kang;T. Jeong;T. Kim
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
E. Lamour;C. Prigent;J. Rozet;D. Vernhet
通讯作者:
D. Vernhet
DOI:
--
发表时间:
1989
期刊:
影响因子:
--
作者:
S. Affrossman;R. Bailey;C. H. Cramer;F. Cruickshank;J. MacAllister;J. Alderman
通讯作者:
J. Alderman
DOI:
10.1117/12.950624
发表时间:
1987-07
期刊:
Applied Physics A
影响因子:
--
作者:
R. Kullmer;D. Bäuerle
通讯作者:
R. Kullmer;D. Bäuerle
DOI:
--
发表时间:
1991
期刊:
影响因子:
--
作者:
G. Oehrlein;T. Bestwick;P. Jones;M. Jaso;J. Lindström
通讯作者:
J. Lindström