摘要
针对Si衬底不透明而无法采用透射谱测量GaN薄膜厚度问题,应用反射谱测量,同时结合晶体薄膜的干涉效应原理,并考虑到晶体折射率随光子能量变化的因素,从理论上推导出了实用的薄膜厚度计算方法,从而得到实现材料特性的方便表征和MOCVD设备的在线薄膜厚度测量的新途径。
For the transmission spectra can not measure film thickness of GaN on Si which is opaque, A mothod using reflection spectra is given .the method uses the interference effect of the crystal film and considers the effect of the refractive index n on the photon wavelength,the result of compute simulation shows that the method is a rapid and precise one for measuring the film thickness of GaN crystals.
出处
《电子质量》
2004年第12期56-57,共2页
Electronics Quality