Wafer requirement for future power devices

For the future power electronics system, one of the key issues is to achieve more high power densities. At the moment, several types of silicon devices are widely used from the low voltage to high voltage ranges. To achieve more high power densities by size reduction and more high operating temperature, not only the device but also wafer material should be improved. The current status and future prospect of PE system with silicon technology will be discussed. Then, the role of compound semiconductor and its devices will be also discussed by comparison with silicon PE system.