Single step process for epitaxial lateral overgrowth of nitride based materials
    11.
    发明授权
    Single step process for epitaxial lateral overgrowth of nitride based materials 失效
    用于氮化物基材料外延横向过度生长的单步法

    公开(公告)号:US06478871B1

    公开(公告)日:2002-11-12

    申请号:US09676938

    申请日:2000-10-02

    IPC分类号: C30B2504

    摘要: An epitaxial deposition process produces epitaxial lateral overgrowth (ELO) of nitride based materials directly a patterned substrate (10). The substrate (10) is preferably formed from SiC or sapphire, and is patterned with a mask (12), preferably formed of silicon nitride, having a plurality of openings (13) formed therein. A nucleation layer (14), preferably formed of AlGaN, is grown at a high reactor temperature of 700-1100 degrees C., which wets the exposed substrate surface, without significant nucleation on the mask (12). This eliminates the need for regrowth while producing smooth growth surfaces in the window openings (13) as well as over the mask (12). Subsequent deposition of a nitride based material layer (16), preferably GaN, results in a relatively defect free planar surfaced material grown laterally over the mask (12).

    摘要翻译: 外延沉积工艺直接对图案化的衬底(10)产生氮化物基材料的外延横向过度生长(ELO)。 衬底(10)优选地由SiC或蓝宝石形成,并且用在其中形成有多个开口(13)的掩模(12)图案化,优选由氮化硅形成。 优选由AlGaN形成的成核层(14)在700-1100℃的高反应器温度下生长,其在暴露的基底表面上润湿,而在掩模(12)上没有显着的成核。 这消除了在窗口(13)中以及面罩(12)上方产生光滑生长表面的同时需要再生长。 随后沉积氮化物基材料层(16),优选GaN,导致在掩模(12)上横向生长的相对缺陷的平坦表面材料。