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    • 7. 发明授权
    • Sapphireless group III nitride semiconductor and method for making same
    • 无蓝宝石III族氮化物半导体及其制造方法
    • US5620557A
    • 1997-04-15
    • US494846
    • 1995-06-26
    • Katsuhide ManabeMasayoshi KoikeHisaki KatoNorikatsu KoideIsamu AkasakiHiroshi Amano
    • Katsuhide ManabeMasayoshi KoikeHisaki KatoNorikatsu KoideIsamu AkasakiHiroshi Amano
    • C30B25/02H01L33/32H01L21/00
    • C30B25/02C30B29/403C30B29/406H01L33/007H01L33/0075Y10S117/915
    • A method of manufacturing two sapphireless layers (3a, 3b) at one time made of Group III nitride compound semiconductor satisfying the formula Al.sub.x Ga.sub.y In.sub.1-x-y N, inclusive of x=0, y=0, and x=y=0, and a LED (10) utilizing one of the semiconductor layers (3a, 3b) as a substrate (3) includes the steps of forming two zinc oxide (ZnO) intermediate layers (2a, 2b) on each side of a sapphire substrate (1), forming two Group III nitride compound semiconductor layers (3a, 3b) satisfying the formula Al.sub.x Ga.sub.y In.sub.1-x-y N, inclusive of x=0, y=0, and x=y=0, each laminated on each of the intermediate ZnO layers (2a, 2b), and separating the intermediate ZnO layers (2a, 2b) from the sapphire substrate (1) by etching with an etching liquid only for the ZnO layers (2a, 2b). At least one of the so-obtained Group III nitride compound layers is provided with n and p MOVPE layers (4, 5) formed thereon with electrodes (6, 7) on opposite sides to form an LED emitting in the 450 nm region and having a low device resistance.
    • 一次由满足公式Al x Ga y In 1-x-y N的III族氮化物化合物半导体制造两个蓝宝石层(3a,3b)的方法,包括x = 0,y = 0和x = y = 0,以及 利用半导体层(3a,3b)之一作为基板(3)的LED(10)包括在蓝宝石基板(1)的每一侧上形成两个氧化锌(ZnO)中间层(2a,2b)的步骤, 形成满足式Al x Ga y In 1-x-y N的两个III族氮化物化合物半导体层(3a,3b),包括x = 0,y = 0和x = y = 0,各层叠在每个中间ZnO层 ,2b),并且通过仅用于ZnO层(2a,2b)的蚀刻液蚀刻从中分离出中间ZnO层(2a,2b)和蓝宝石衬底(1)。 如此获得的III族氮化物化合物层中的至少一个设置有在其上形成有电极(6,7)的相对侧上的n和p个MOVPE层(4,5),以形成在450nm区域中发射的LED,并且具有 器件电阻低。
    • 10. 发明授权
    • Group III-V semiconductor light emitting devices with reduced piezoelectric fields and increased efficiency
    • 具有降低的压电场和提高效率的III-V族III族半导体发光器件
    • US06229151B1
    • 2001-05-08
    • US09162708
    • 1998-09-29
    • Tetsuya TakeuchiNorihide YamadaHiroshi AmanoIsamu Akasaki
    • Tetsuya TakeuchiNorihide YamadaHiroshi AmanoIsamu Akasaki
    • H01L2906
    • H01L33/32B82Y20/00H01L33/16H01L33/18H01L33/24H01S5/021H01S5/0213H01S5/3201H01S5/3202H01S5/343H01S5/34333
    • An optical semiconductor device having a plurality of GaN-based semiconductor layers containing a strained quantum well layer in which the strained quantum well layer has a piezoelectric field that depends on the orientation of the strained quantum well layer when the quantum layer is grown. In the present invention, the strained quantum well layer is grown with an orientation at which the piezoelectric field is less than the maximum value of the piezoelectric field strength as a function of the orientation. In devices having GaN-based semiconductor layers with a wurtzite crystal structure, the growth orientation of the strained quantum well layer is tilted at least 1° from the {0001} direction of the wurtzite crystal structure. In devices having GaN-based semiconductor layers with a zincblende crystal structure, the growth orientation of the strained quantum well layer is tilted at least 1° from the {111} direction of the zincblende crystal structure. In the preferred embodiment of the present invention, the growth orientation is chosen to minimize the piezoelectric field in the strained quantum well layer.
    • 一种具有多个GaN基半导体层的光半导体器件,其含有应变量子阱层,其中应变量子阱层具有取决于量子层生长时应变量子阱层的取向的压电场。 在本发明中,应变量子阱层以压电场小于压电场强度的最大值作为取向的方向生长。 在具有纤锌矿晶体结构的GaN基半导体层的器件中,应变量子阱层的生长方向从纤锌矿晶体结构的{0001}方向倾斜至少1°。 在具有锌辉石晶体结构的GaN基半导体层的器件中,应变量子阱层的生长取向从闪锌矿晶体结构的{111}方向倾斜至少1°。 在本发明的优选实施例中,选择生长方向以最小化应变量子阱层中的压电场。