TY - JOUR
T1 - An investigation of preferred orientation of doped ZnO films on the 36° YX-LiTaO3 substrates and fabrications of Love-mode devices
AU - Chang, Ren Chuan
AU - Chu, Sheng Yuan
AU - Hong, Cheng Shong
AU - Chuang, Yu Ting
N1 - Funding Information:
This research was supported by the National Science Council of Republic of China, under grant NSC-93-2216-E-006-033. The authors also gratefully acknowledge the supports from Center for Micro-Nano Technology, National Cheng Kung University.
PY - 2006/2/24
Y1 - 2006/2/24
N2 - Love-mode surface acoustic wave (SAW) devices are very promising for liquid and gas media sensing applications because of high sensitivity. In this paper, an experimental study of the structures based on zinc oxide (ZnO) guiding layer and 36° YX-lithium tantalate (LiTaO3) substrate with different sputtering conditions to deposit ZnO films is presented. Poly-crystal ZnO films with c-axis (002) orientation have been successfully grown on the 36° YX-LiTaO3 substrate by RF magnetron sputtering technique. The deposited films were characterized as a function of argon-oxygen gas flow ratio, RF power, deposition pressure, and annealing temperature. Crystalline structures, stress, and surface roughness characteristics of the films were investigated by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), and atomic force microscopy (AFM) measurements. Highly orientated (002) films were obtained under a base pressure of 10 mTorr, containing 40% oxygen and 60% argon at RF power of 60 W and a substrate temperature around 120 °C. The films were then annealed at 600 °C. Love-mode devices based on this structure (ZnO/ IDT/36° YX-LiTaO3) are presented.
AB - Love-mode surface acoustic wave (SAW) devices are very promising for liquid and gas media sensing applications because of high sensitivity. In this paper, an experimental study of the structures based on zinc oxide (ZnO) guiding layer and 36° YX-lithium tantalate (LiTaO3) substrate with different sputtering conditions to deposit ZnO films is presented. Poly-crystal ZnO films with c-axis (002) orientation have been successfully grown on the 36° YX-LiTaO3 substrate by RF magnetron sputtering technique. The deposited films were characterized as a function of argon-oxygen gas flow ratio, RF power, deposition pressure, and annealing temperature. Crystalline structures, stress, and surface roughness characteristics of the films were investigated by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), and atomic force microscopy (AFM) measurements. Highly orientated (002) films were obtained under a base pressure of 10 mTorr, containing 40% oxygen and 60% argon at RF power of 60 W and a substrate temperature around 120 °C. The films were then annealed at 600 °C. Love-mode devices based on this structure (ZnO/ IDT/36° YX-LiTaO3) are presented.
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U2 - 10.1016/j.surfcoat.2005.07.021
DO - 10.1016/j.surfcoat.2005.07.021
M3 - Article
AN - SCOPUS:31644443185
VL - 200
SP - 3235
EP - 3240
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
SN - 0257-8972
IS - 10 SPEC. ISS.
ER -