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    • 116. 发明申请
    • NITRIDE SEMICONDUCTOR
    • 氮化物半导体
    • US20140073118A1
    • 2014-03-13
    • US14087855
    • 2013-11-22
    • MITSUBISHI CHEMICAL CORPORATION
    • Hideyoshi HORIEKaori KURIHARA
    • H01L21/02
    • H01L33/06H01L21/0237H01L21/0254H01L21/02573H01L21/02609H01L21/0262H01L33/0025H01L33/02H01L33/16H01L33/18H01L33/32H01L33/325
    • To provide a high-quality nitride semiconductor ensuring high emission efficiency of a light-emitting element fabricated. In the present invention, when obtaining a nitride semiconductor by sequentially stacking a one conductivity type nitride semiconductor part, a quantum well active layer structure part, and a another conductivity type nitride semiconductor part opposite the one conductivity type, the crystal is grown on a base having a nonpolar principal nitride surface, the one conductivity type nitride semiconductor part is formed by sequentially stacking a first nitride semiconductor layer and a second nitride semiconductor layer, and the second nitride semiconductor layer has a thickness of 400 nm to 20 μm and has a nonpolar outermost surface. By virtue of selecting the above-described base for crystal growth, an electron and a hole, which are contributing to light emission, can be prevented from spatial separation based on the QCSE effect and efficient radiation is realized. Also, by setting the thickness of the second nitride semiconductor layer to an appropriate range, the nitride semiconductor surface can avoid having extremely severe unevenness.
    • 提供确保所制造的发光元件的高发射效率的高质量氮化物半导体。 在本发明中,当通过依次层叠一个导电型氮化物半导体部件,量子阱活性层结构部分和与一种导电类型相反的另一导电型氮化物半导体部件来获得氮化物半导体时,晶体生长在基底 具有非极性主氮化物表面的情况下,通过依次层叠第一氮化物半导体层和第二氮化物半导体层而形成一个导电型氮化物半导体部,并且第二氮化物半导体层的厚度为400nm〜20μm,具有非极性 最外面。 通过选择上述用于晶体生长的基底,可以防止基于QCSE效应的有助于发光的电子和空穴进行空间分离,并且实现有效的辐射。 此外,通过将第二氮化物半导体层的厚度设定在适当的范围,氮化物半导体表面可以避免具有非常严重的不均匀性。