Azzurro Semiconductor of Germany has produced sample 8-inch Ga-on-Si (gallium on silicon substrates) LED epitaxial wafers. The company’s sales & marketing vice president, Erwin Ysewijn. announced plans to begin volume production as soon as the end of the second quarter of 2013.
Ysewlin indicated that Azzurro has prepared for volume production for one year. LED makers can either procure Azzurro-made finished GaN-on-Si LED epitaxial wafers for LED chips, or procure Si-substrate wafers with GaN films for LED epitaxial wafers, Ysewijn noted. According to Ysewlin, LED chips made from GaN-on-Si epitaxial wafers have a 5% lower luminous efficiency than those made from sapphire wafers, but the unit price of ERU0.20/(US$0.27) per square cm for the GaN-on-Si is much lower than that of EUR0.30