Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/23886
Title: Micro-patterning of 0.70Pb(Mg1/3Nb2/3)O3-0.30PbTiO3 single crystals by ultrasonic wet chemical etching
Authors: Peng, J
Chao, C
Dai, J 
Chan, HLW 
Luo, H
Keywords: MEMS
PMN-PT
Single crystals
Wet chemical etching
Issue Date: 2008
Publisher: North-Holland
Source: Materials letters, 2008, v. 62, no. 17-18, p. 3127-3130 How to cite?
Journal: Materials letters 
Abstract: Ultrasonic-assisted wet chemical etching process was developed for thinning and pattering of single crystalline 0.70Pb(Mg1/3Nb2/3)O3-0.30PbTiO3 (0.70PMN-0.30PT) thin layers for micro-electromechanical systems (MEMS) applications. 50 kHz ultrasonic bath with appropriate intensity turned out to be an effective way to speed up the etching process while maintain a constant etching rate. The relationships of etching rates versus chemical concentrations, temperatures and crystalline orientations were investigated. It was found that the chemical etching is thermally activated with an activation energy Ea of 67.7 kcal/mol, and the highest etching rate (6.2 μm/min) was achieved by ultrasonic-assisted etching along the <1-10>cub direction at room temperature. The feasibility of micro-scale patterning of PMN-PT single crystal layers was also demonstrated by using patterned Au/Cr layer as the etching mask.
URI: http://hdl.handle.net/10397/23886
ISSN: 0167-577X
EISSN: 1873-4979
DOI: 10.1016/j.matlet.2008.02.003
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