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    • 2. 发明申请
    • METHODS FOR IMPROVED GROWTH OF GROUP III NITRIDE BUFFER LAYERS
    • 改善III组氮化物缓冲层生长的方法
    • WO2012162196A2
    • 2012-11-29
    • PCT/US2012/038729
    • 2012-05-18
    • APPLIED MATERIALS, INC.MELNIK, YuriyCHEN, LuKOJIRI, Hidehiro
    • MELNIK, YuriyCHEN, LuKOJIRI, Hidehiro
    • H01L21/20
    • H01L21/02304H01L21/0242H01L21/02458H01L21/02505H01L21/0254H01L21/0262H01L29/2003H01L29/872
    • Methods are disclosed for growing high crystal quality group III-nitride epitaxial layers with advanced multiple buffer layer techniques. In an embodiment, a method includes forming group III-nitride buffer layers that contain aluminum on suitable substrate in a processing chamber of a hydride vapor phase epitaxy processing system. A hydrogen halide or halogen gas is flowing into the growth zone during deposition of buffer layers to suppress homogeneous particle formation. Some combinations of low temperature buffers that contain aluminum (e.g., AlN, AlGaN) and high temperature buffers that contain aluminum (e.g., AlN, AlGaN) may be used to improve crystal quality and morphology of subsequently grown group III-nitride epitaxial layers. The buffer may be deposited on the substrate, or on the surface of another buffer. The additional buffer layers may be added as interlayers in group III-nitride layers (e.g., GaN, AlGaN, AlN).
    • 公开了用于生长具有先进的多缓冲层技术的高结晶质量III族氮化物外延层的方法。 在一个实施例中,一种方法包括在氢化物气相外延处理系统的处理室中形成在合适的衬底上含有铝的III族氮化物缓冲层。 在沉积缓冲层期间,卤化氢或卤素气体流入生长区以抑制均匀的颗粒形成。 可以使用含有铝的低温缓冲液(例如AlN,AlGaN)和含有铝的高温缓冲液(例如AlN,AlGaN)的一些组合来改善随后生长的III族氮化物外延层的晶体质量和形态。 缓冲液可以沉积在衬底上,或者沉积在另一缓冲液的表面上。 附加的缓冲层可以作为III族氮化物层(例如,GaN,AlGaN,AlN)中的中间层添加。