標題: OPTICAL CHARACTERIZATION OF DIAMOND SYNTHESIZED USING CH4-CO2 GAS-MIXTURES WITHOUT SUPPLYING HYDROGEN GAS
作者: CHEN, CF
CHEN, SH
HONG, TM
LEU, JS
交大名義發表
材料科學與工程學系
National Chiao Tung University
Department of Materials Science and Engineering
關鍵字: CHEMICAL VAPOR DEPOSITION;DIAMOND;FOURIER TRANSFORM INFRARED SPECTROSCOPY;METHANE
公開日期: 15-十二月-1994
摘要: Diamond films are the optical choice for IR window applications. Polycrystalline diamond films were synthesized in this study by microwave-plasma-assisted chemical vapour deposition (PACVD) using CH4 + CO2 as reactive gases. The primary purpose of this study is to determine the effect of the deposition conditions on the optical properties of PACVD diamond films. Room temperature optical properties of free-standing diamond films were studied by Fourier transform IR spectroscopy. Experimental results indicate that the refractive index of diamond films is comparable with that of natural diamond. The scattering loss caused by the rough surface of as-grown diamond film was reduced using a two-step process and polishing techniques. The resulting reduction in scattering loss increased the transmission intensity. For low temperature deposited diamond film the intensity of absorption due to carbon-hydrogen stretch bands was higher than that for film deposited at a high temperature. IR spectra are fitted with simulated spectra to determine the background absorption caused by the amorphous carbon contained in the films. Additionally, the background absorption of low temperature deposited diamond film was found to be larger than that of a diamond film deposited at 850 degrees C.
URI: http://hdl.handle.net/11536/2176
ISSN: 0040-6090
期刊: THIN SOLID FILMS
Volume: 253
Issue: 1-2
起始頁: 162
結束頁: 167
顯示於類別:期刊論文