Transparent substrate light emitting diodes with directed light output

    公开(公告)号:US5793062A

    公开(公告)日:1998-08-11

    申请号:US962944

    申请日:1997-10-24

    摘要: Methods for the fabrication of TS LED chips with improved light extraction and optics, particularly increased top surface emission, and the TS LEDs so fabricated are described. Non-absorbing DBRs within the chip permit the fabrication of the LEDs. The transparent DBRs redirect light away from absorbing regions such as contacts within the chip, increasing the light extraction efficiency of the LED. The non-absorbing DBRs can also redirect light toward the top surface of the chip, improving the amount of top surface emission and the on-axis intensity of the packaged LED. These benefits are accomplished with optically non-absorbing layers, maintaining the advantages of a TS LED, which advantages include .about.6 light escape cones, and improved multiple pass light extraction.

    Banded semiconductor optical amplifier
    96.
    发明授权
    Banded semiconductor optical amplifier 有权
    带状半导体光放大器

    公开(公告)号:US08964284B2

    公开(公告)日:2015-02-24

    申请号:US13449515

    申请日:2012-04-18

    IPC分类号: H04S5/00

    摘要: A semiconductor optical amplifier module may include a beam splitter to split an optical signal into two polarization optical signals including a first polarization optical signal with a Transverse Magnetic (TM) polarization provided along a first path of two paths, and a second polarization optical signal with a Transverse Electric (TE) polarization provided along a second path of the two paths; a first rotator to rotate the TM polarization of the first polarization optical signal to TE polarization; a first semiconductor optical amplifier to amplify the rotated first polarization optical signal to output a first resultant optical signal; a second semiconductor optical amplifier to amplify the second polarization optical signal; and a second rotator to rotate the polarization of the amplified second polarization optical signal to output a second resultant optical signal; and a beam combiner to combine the first resultant optical signal and the second resultant optical signal.

    摘要翻译: 半导体光放大器模块可以包括光束分离器,以将光信号分成两个偏振光信号,包括具有沿着两条路径的第一路径提供的横向磁(TM)偏振的第一偏振光信号,以及第二偏振光信号, 沿着两个路径的第二路径提供的横向电(TE)极化; 第一旋转器,用于将第一偏振光信号的TM偏振旋转为TE极化; 第一半导体光放大器,用于放大旋转的第一偏振光信号以输出第一合成光信号; 第二半导体光放大器,用于放大第二偏振光信号; 以及第二旋转器,用于旋转放大的第二偏振光信号的偏振,以输出第二合成光信号; 以及光束组合器,以组合第一合成光信号和第二合成光信号。

    III-nitride light emitting devices fabricated by substrate removal
    98.
    发明授权
    III-nitride light emitting devices fabricated by substrate removal 有权
    通过衬底去除制造的III族氮化物发光器件

    公开(公告)号:US07491565B2

    公开(公告)日:2009-02-17

    申请号:US11330209

    申请日:2006-01-10

    IPC分类号: H01L21/00

    摘要: Devices and techniques for fabricating InAlGaN light-emitting devices are described that result from the removal of light-emitting layers from the sapphire growth substrate. In several embodiments, techniques for fabricating a vertical InAlGaN light-emitting diode structure that result in improved performance and or cost-effectiveness are described. Furthermore, metal bonding, substrate liftoff, and a novel RIE device separation technique are employed to efficiently produce vertical GaN LEDs on a substrate chosen for its thermal conductivity and ease of fabrication.

    摘要翻译: 描述了从蓝宝石生长衬底去除发光层所产生的用于制造InAlGaN发光器件的器件和技术。 在几个实施例中,描述了用于制造导致改进的性能和/或成本效益的垂直InAlGaN发光二极管结构的技术。 此外,采用金属结合,衬底剥离和新颖的RIE器件分离技术来有效地在选择用于其导热性和易于制造的衬底上生产垂直GaN LED。

    Diffusion barrier for increased mirror reflectivity in reflective solderable contacts on high power LED chip
    100.
    发明授权
    Diffusion barrier for increased mirror reflectivity in reflective solderable contacts on high power LED chip 有权
    用于增加大功率LED芯片上可反射可焊接触点的镜面反射率的扩散屏障

    公开(公告)号:US06222207B1

    公开(公告)日:2001-04-24

    申请号:US09317647

    申请日:1999-05-24

    IPC分类号: H01L3300

    CPC分类号: H01L33/405

    摘要: A solderable light-emitting diode (LED) chip and a method of fabricating an LED lamp embodying the LED chip utilize a diffusion barrier that appreciably blocks molecular migration between two different layers of the LED chip during high temperature processes. In the preferred embodiment, the two different layers of the LED chip are a back reflector and a solder layer. The prevention of intermixing of the materials in the back reflector and the solder layer impedes degradation of the back reflector with respect to its ability to reflect light emitted by the LED. The LED chip includes a high power AlInGaP LED or other type of LED, a back reflector, a diffusion barrier and a solder layer. Preferably, the back reflector is composed of silver (Ag) or Ag alloy and the solder layer is made of indium (In), lead (Pb), gold (Au), tin (Sn), or their alloy and eutectics. In a first embodiment, the diffusion layer is made of nickel (Ni) or nickel-vanadium (NiV). In a second embodiment of the invention, the diffusion barrier is made of titanium-tungsten-nitride (TiW:N). In addition to preventing the intermixing of the In of the solder layer with the Ag of the back reflector, the diffusion layer prevents degradation of the Ag reflective properties in the back reflector upon exposure to air. In an alternative embodiment, the diffusion layer is made of a non-conductive material.

    摘要翻译: 可焊接的发光二极管(LED)芯片和制造实施LED芯片的LED灯的方法利用在高温过程中可以明显阻挡LED芯片的两个不同层之间的分子迁移的扩散阻挡层。 在优选实施例中,LED芯片的两个不同层是后反射器和焊料层。 防止背反射器和焊料层中的材料的混合相对于其反射由LED发射的光的能力而妨碍背反射器的劣化。 LED芯片包括高功率AlInGaP LED或其他类型的LED,后反射器,扩散阻挡层和焊料层。 优选地,背反射器由银(Ag)或Ag合金构成,并且焊料层由铟(In),铅(Pb),金(Au),锡(Sn)或其合金和共晶体制成。 在第一实施例中,扩散层由镍(Ni)或镍 - 钒(NiV)制成。 在本发明的第二实施例中,扩散阻挡层由钛 - 氮化钨(TiW:N)制成。 除了防止焊料层的In与后反射体的Ag的混合之外,扩散层防止了暴露于空气中后反射器中的Ag反射特性的劣化。 在替代实施例中,扩散层由非导电材料制成。