Showa Denko K.K. (SDK) has developed a new process for making high-quality compound semiconductors based on gallium nitride (GaN) and other nitrides to meet growing demand mainly for use in blue/white LEDs. The new process, named the "Hybrid PPDTM process," is a combination of the conventional metal organic chemical vapor deposition (MOCVD) process and SDK's proprietary
plasma assisted physical deposition (PPDTM) process for growing nitride-based semiconductor crystals. According to the company, the new process technology enables the production of four-inch epitaxial wafers with high quality, which is not possible with the conventional MOCVD process.
Furthermore, SDK has decided to build a facility at its site in Chiba, Japan, to produce four-inch epitaxial wafers based on the new process technology. Due to the larger size of wafers under the new technology and the construction of the new line, SDK's blue LED production capacity will be increased, from 30 million units a month at present, to 100 million units a month by the end of this year.