Switching from dry process to wet produces lower capital and manufacturing costs, scalability, and better throughput MicroTech has developed a wet process station for the etching of PSS (Patterned Sapphire Substrate) wafers used to increase light extraction and efficiency in high brightness LEDs. The wet station can improve manufacturing throughput, a major stumbling block to making LEDs price competitive with fluorescent lighting. As LED manufacturers look to decrease costs, the use of PSS becomes more important. The average light output power is reported to be...