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Etching characteristics of LiNbO3 in reactive ion etching and inductively coupled plasma
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Ren, Z., Heard, P. J., Marshall, Jessica M., Thomas, Pam A. and Yu, S. (2008) Etching characteristics of LiNbO3 in reactive ion etching and inductively coupled plasma. Journal of Applied Physics, Volume 103 (Number 3). . 034109 . doi:10.1063/1.2838180 ISSN 0021-8979.
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Official URL: http://dx.doi.org/10.1063/1.2838180
Abstract
The etching characteristics of congruent LiNbO3 single crystals including doped LiNbO3 and proton-changed LiNbO3 have been studied in reactive ion etching (RIE) and inductively coupled plasma (ICP) etching tools, using different recipes of gas mixtures. The effects of parameters including working pressure, RIE power, and ICP power are investigated and analyzed by measurement of etching depth, selectivity, uniformity, etched surface state, and sidewall profile by means of focused ion beam etching, energy-dispersive x-ray analysis, secondary ion mass spectroscopy, scanning electron microscopy, and surface profilometry. The effects of a sample carrier wafer coating have also been investigated. Optimized processes with high etching rates, good mask selectivity, and a near-vertical profile have been achieved. Ridge waveguides on proton-exchanged LiNbO3 have been fabricated and optically measured. (c) 2008 American Institute of Physics.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Lithium niobate, Plasma etching | ||||
| Journal or Publication Title: | Journal of Applied Physics | ||||
| Publisher: | American Institute of Physics | ||||
| ISSN: | 0021-8979 | ||||
| Official Date: | 1 February 2008 | ||||
| Dates: |
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| Volume: | Volume 103 | ||||
| Number: | Number 3 | ||||
| Number of Pages: | 8 | ||||
| Page Range: | |||||
| Article Number: | 034109 | ||||
| DOI: | 10.1063/1.2838180 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||
| Grant number: | EP/D06273X/1 (EPSRC) |
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