| 摘要 |
A nitride based semiconductor device, wherein provided are a substrate (23), a first layer comprising an oriented polycrystalline nitride based semiconductor (24, 29, 32, 35, 39, 45, 46, 49) which is formed directly on the substrate (23) and has a thickness less than 5000 angstrom, operation layers (25, 26, 30, 31, 33, 34, 36, 37, 38, 40, 41, 42, 47, 48) made of single crystal nitride based semiconductors and formed directly on the first layer, and electrodes (27, 28, 43, 44) connected with predetermined places and at least one electrode (28, 44) of the electrodes (27, 28, 43, 44) are in connection with the first layer. The semiconductor device is manufactured by a crystal growth equipment by a molecular beam epitaxy method, wherein provided are a gas source (7) which feeds a compound containing nitrogen in the form of a gas, solid sources (2, 3, 4) which feed group III elements, and sources (5, 6) which feed n-type and p-type dopants. The first layer is created on the substrate (9) at a growth speed of 0.1-20 angstroms/sec by feeding the gas-like compound containing nitrogen and the group III elements onto the surface of the substrate (9) under the pressure less than 10<-><5> Torr and at a temperature of the substrate (9) of 300-1000 DEG C. The operation layer is created on the first layer at a growth speed of 0.1-10 angstroms/sec by feeding the gas-like compound containing nitrogen and the group III elements onto the surface of the first layer under the pressure less than 10<-><5> Torr and at the temperature of the substrate of 300-1000 DEG C. <IMAGE> |
