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    • 2. 发明公开
    • High-power semiconductor laser device having current confinement structure and index-guided structure
    • Hochleistungshalbleiterlaser mit Strombegrenzung undindexgeführterStruktur
    • EP1104057A2
    • 2001-05-30
    • EP00124832.7
    • 2000-11-14
    • Fuji Photo Film Co., Ltd.
    • Fukunaga, ToshiakiWada, Mitsugu
    • H01S5/223
    • H01S5/2231H01S5/2206H01S5/222H01S5/3201H01S5/32391
    • In a semiconductor laser device: a lower cladding layer; a lower optical waveguide layer; a compressive strain quantum well active layer made of In x3 Ga 1-x3 As 1-y3 P y3 , where 0 x8 Ga 1-x8 P of a second conductive type, and formed on the upper optical waveguide layer; an etching stop layer made of In x1 Ga 1-x1 As 1-y1 P y1 of the second conductive type, where 0≤x1≤0.3, 0≤y1≤0.3; a current confinement layer made of In x8 Ga 1-x8 P of the first conductive type, where x8=0.49±0.01; a second upper cladding layer made of Al z4 Ga 1-z4 As of the second conductive type, where 0.20≤z4≤0.50; and a contact layer of the second conductive type are formed on a GaAs substrate of a first conductive type in this order. In the semiconductor laser device, the absolute value of the product of the strain and the thickness of the compressive strain quantum well active layer is equal to or smaller than 0.25 nm; the absolute value of a second product of the strain and the thickness of the etching stop layer is equal to or smaller than 0.25 nm; and each of the lower cladding layer, the lower optical waveguide layer, the upper optical waveguide layer, the first upper cladding layer, the current confinement layer, the second upper cladding layer, and the contact layer has such a composition as to lattice-match with the GaAs substrate.
    • 在半导体激光装置中:下包层; 下光波导层; 由Inx3Ga1-x3As1-y3Py3制成的压应变量子阱有源层,其中0
    • 6. 发明公开
    • Method of growing multilayer crystal films by metal organic vapor phase epitaxy
    • Verfahren zur Herstellung mehrschichtiger kristalliner Filmen durch Metallorganische-Dampfphase Epitaxie
    • EP0732429A1
    • 1996-09-18
    • EP96301797.5
    • 1996-03-15
    • NEC Corporation
    • Nakamura, TakahiroAe, Satoshi
    • C30B25/02C30B29/40H01L21/205
    • C30B25/02C30B25/14C30B29/40H01L21/02461H01L21/02463H01L21/02507H01L21/02543H01L21/02546H01L21/0262H01S5/32391H01S2304/04
    • Disclosed are methods of preparing multilayer structures with InGaAsP layers of different compositions by metal organic vapor phase epitaxy, which result in formation of sharp heterointerfaces. After an InGaAsP well layer has been grown, the process is kept on standby with a flow of AsH 3 and PH 3 , which are sources comprising elements of group V, at the well's composition ratios, and then with a flow of a source comprising an element of group V, including TBP (TBP/standby step), and an InGaAsP barrier layer is grown which has a smaller arsenic content than the well layer. TBP has a decomposition temperature.approximately 100°C lower than PH 3 , and thus provides a phosphorus pressure which is five times or more as high as that of PH 3 at identical growth temperatures and at identical V/III ratios. Therefore, during the process of growth of multilayer InGaAsP films, TBP may be used in a standby step with a flow of a source comprising an element of group V at the same composition ratio as is designed for an InGaAsP layer which has a smaller arsenic content than the previously grown layer and is subsequently grown, to prevent arsenic desorption from chamber walls and group V species desorption from the exposed interfaces, thus realizing sharp heterointerfaces.
    • 公开了通过金属有机气相外延制备具有不同组成的InGaAsP层的多层结构的方法,其导致形成尖锐的异质界面。 在已经生长了InGaAsP阱层之后,以井的组成比,以包含V族元素的源的AsH 3和PH 3流保持该过程的待命状态,然后使源流包括源 组V,包括TBP(TBP /备用步骤)和生长具有比阱层更小的砷含量的InGaAsP势垒层。 TBP具有比PH3低约100℃的分解温度,因此在相同的生长温度和相同的V / III比下提供磷压力是PH3的五倍或更多倍的磷压。 因此,在多层InGaAsP膜的生长过程中,TBP可用于备用步骤,其中流动的源包含与对于具有较小砷含量的InGaAsP层相同的组成比的V族元素 比之前生长的层并且随后生长,以防止从室壁的砷解吸和组V物质从暴露的界面解吸,从而实现尖锐的异质界面。