摘要:
The present invention discloses a method of heteroepitaxial growth enabling the successful growth of thin films of GaN and III-nitride semiconductor heterostructures of (0001) orientation with III metal-face polarity on diamond substrates being either polycrystalline or single crystal with various crystallographic orientations. The method uses a thin AlN nucleation layer on the diamond substrate with thickness equal or less than 5 nm, grown by Molecular Beam Epitaxy (MBE) using a nitrogen plasma source. The invention enables the development of very high power metal-face III-nitride devices, such as High Electron Mobility Transistors, on single crystal or polycrystalline diamond substrates. The method is also applicable for other element IV substrates with diamond crystal structure.
摘要:
A gallium-containing alloy is formed on the light-receiving surface of a CIGS absorber layer, and, in conjunction with a subsequent selenization or anneal process, is converted to a gallium-rich region at the light-receiving surface of the CIGS absorber layer. A second gallium-rich region is formed at the back contact surface of the CIGS absorber layer during selenization, so that the CIGS absorber layer has a double-graded gallium concentration that increases toward the light-receiving surface and toward the back contact surface of the CIGS absorber layer. The double-graded gallium concentration advantageously produces a double-graded bandgap profile for the CIGS absorber layer.
摘要:
Procédé de fabrication par mécanosynthèse d'une poudre du compo¬ sé Cu 2 ZnSnS z Se 4 - z dans lequel 0 2 ZnSnS z Se 4 - z . L'invention concerne également l'utilisation du procédé pour réaliser une couche mince, entrant en particulier dans la composition d'une cellule photovoltaïque.
摘要:
To manufacture a highly reliable semiconductor device by giving stable electric characteristics to a transistor. An oxide semiconductor film is deposited by a sputtering method with the use of a polycrystalline sputtering target. In that case, partial pressure of water in a deposition chamber before or in the deposition is set to be lower than or equal to 10 -3 Pa, preferably lower than or equal to 10 -4 Pa, more preferably lower than or equal to 10 -5 Pa. Thus, a dense oxide semiconductor film is obtained. The density of the oxide semiconductor film is higher than 6.0 g/cm 3 and lower than 6.375 g/cm 3 .
摘要翻译:通过给晶体管提供稳定的电特性来制造高度可靠的半导体器件。 通过使用多晶溅射靶的溅射法沉积氧化物半导体膜。 在这种情况下,在沉积之前或沉积期间沉积室中的水的分压设定为低于或等于10 -3 Pa,优选低于或等于10 -4 Pa,更优选低于或等于10 -5Pa。因此,获得了致密的氧化物半导体膜。 氧化物半导体膜的密度高于6.0g / cm 3,低于6.375g / cm 3。
摘要翻译:提供了Ga 2 O 3 HEMT,其是高质量的Ga 2 O 3半导体元件。 提供了Ga2O3 HEMT(20),其包括:i型β-Ga 2 O 3单晶膜(3); 形成在i型β-Ga 2 O 3单晶膜(3)上的n型β-(Al x Ga 1-x)2 O 3单晶膜(4),由β-(Al x Ga 1-x)2 O 3 含有IV族元素的晶体(0