I wonder if there is any info available on the reflectivity versus Aluminum thickness coated on polished silicon surface. Also do I need an adhesion layer and thickness of it between Aluminum and silicon? The desire wavelength is 600~800nm. Thanks! Kimi --------------------------------- 每天都 Yahoo!奇摩 海的顏色、風的氣息、愛你的溫度,盡在信紙底圖 信紙底圖