... 90-99.7% Ceramic Alumina Plate Substrate As LED Plate & Washer Etc.Could Metallized With Gold,Silver ... ,Copper,Ni,Mn Etc.For Electronic Applications!Customized Designs Acceptable!It has the ... cutting,is used in thick film circuit,large-scale integrated circuit,hybrid IC,semiconductor package,chip resistor ... .7% High Purity Alumina Electronic Plate For LED,And PCB Applications