Reactive ion etching of sloped sidewalls for surface emitting structures using a shadow mask technique
作者:
B. Jacobs,
R. Zengerle,
期刊:
Journal of Vacuum Science&Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena
(AIP Available online 1996)
卷期:
Volume 14,
issue 4
页码: 2537-2542
ISSN:1071-1023
年代: 1996
DOI:10.1116/1.588765
出版商: American Vacuum Society
关键词: MIRRORS;MASKING;ETCHING;ION BEAMS;INDIUM PHOSPHIDES;METHANE;HYDROGEN;InP
数据来源: AIP
摘要:
A novel, very simple technique for the direct adjustment of the slope of facets in a reactive ion etching process is presented. The etching process is performed by screening the sample partially with an aluminum shadow mask, which is located inside the dark space of the plasma. The sidewall angle of etched lines, defined by a pattern mask on the sample, depends strongly on the distance between the shadow mask and the sample. The investigations are carried out with a methane‐hydrogen plasma. The angle of inclination of the sidewalls can be varied in a controllable manner by more than 45°. This technique is well suited to fabricate 90° reflectors, which are necessary for three‐dimensional optical interconnects with planar waveguide structures. To analyze the optical quality of the etched mirror plane, the beam transformation was investigated by reflectivity measurements using a single aluminum‐evaporated mirror structure, which is illuminated by a focused laser beam at a wavelength of 633 nm.
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