Vertical cavity surface emitting laser with photodiode having reduced spontaneous emissions
    11.
    发明授权
    Vertical cavity surface emitting laser with photodiode having reduced spontaneous emissions 有权
    具有减少自发辐射的光电二极管的垂直腔表面发射激光器

    公开(公告)号:US07801199B2

    公开(公告)日:2010-09-21

    申请号:US11026495

    申请日:2004-12-30

    IPC分类号: H01S5/00

    摘要: An optical structure that reduces the effects of spontaneous emissions from the active region of a laser. An optical structure includes optimizations to reduce the effects of spontaneous emissions. The optical structure includes a VCSEL with top and bottom DBR mirrors and an active region connected to the mirrors. The optical structure further includes a photodiode connected to the VCSEL. One or more optimizations may be included in the optical structure including optically absorbing materials, varying the geometry of the structure to change reflective angles, using optical apertures, changing the reflectivity of one or more mirrors, changing the photodiode to be more impervious to spontaneous emissions, and using ion implants to reduce photoluminescence efficiency.

    摘要翻译: 一种降低激光器有源区自发发射效应的光学结构。 光学结构包括优化以减少自发辐射的影响。 光学结构包括具有顶部和底部DBR反射镜的VCSEL和连接到反射镜的有源区域。 光学结构还包括连接到VCSEL的光电二极管。 可以在光学结构中包括一个或多个优化,包括光学吸收材料,改变结构的几何形状以改变反射角度,使用光学孔径,改变一个或多个反射镜的反射率,将光电二极管改变为对自发辐射更为不透明 ,并使用离子注入来降低光致发光效率。

    Electron affinity engineered VCSELs
    13.
    发明授权
    Electron affinity engineered VCSELs 有权
    电子亲和性工程VCSELs

    公开(公告)号:US07065124B2

    公开(公告)日:2006-06-20

    申请号:US10767920

    申请日:2004-01-29

    IPC分类号: H01S3/08 H01S5/00

    摘要: A VCSEL having an N-type Bragg mirror with alternating layers of high bandgap (low index) and low bandgap (high index) layers of AlGaAs. The layers may be separated by a step change of Al composition followed by a graded region, and vice versa for the next layer, in the N-type mirror to result in a lower and more linear series resistance. Also, an N-type spacer layer may be adjacent to an active region of quantum wells. There may be a similar step in a change of Al composition from the nearest layer of the N-type mirror to the N-type spacer formed from a lower bandgap direct AlGaAs layer to provide lower free carrier absorption. With electron affinity engineering, a minority carrier hole barrier may be inserted adjacent to the quantum wells to improve hole confinement at high current density and high temperature.

    摘要翻译: 具有具有高带隙(低折射率)和低带隙(高折射率)AlGaAs层的交替层的N型布拉格反射镜的VCSEL。 这些层可以通过Al组分的阶跃变化和随后的渐变区域分离,反之亦然,在N型反射镜中可以产生较低和更线性的串联电阻。 此外,N型间隔层可以与量子阱的有源区相邻。 从最近的N型反射镜层到由较低带隙的直接AlGaAs层形成的N型间隔物的Al组成变化可能有类似的步骤,以提供较低的自由载流子吸收。 通过电子亲和力工程,可以在量子阱附近插入少数载流子阱屏障,以在高电流密度和高温下改善孔隙限制。

    Apparatus for input amplifier stage
    15.
    发明授权
    Apparatus for input amplifier stage 失效
    输入放大器级的装置

    公开(公告)号:US4529947A

    公开(公告)日:1985-07-16

    申请号:US617138

    申请日:1984-06-04

    IPC分类号: H01L27/08 H04B10/152 H03F3/45

    CPC分类号: H01L27/0802

    摘要: A differential stage of an amplifier includes an input transistor and a second transistor with a significantly greater emitter cross-sectional area than the input transistor. Quiescent emitter current is divided between the two transistors in substantially the same ratio as the emitter cross-sectional areas so that the emitter current densities are substantially equal.

    摘要翻译: 放大器的差分级包括输入晶体管和具有比输入晶体管显着更大的发射极横截面面积的第二晶体管。 静态发射极电流在两个晶体管之间以与发射极横截面积基本相同的比例分压,使得发射极电流密度基本相等。

    Providing photonic control over wafer borne semiconductor devices
    17.
    发明授权
    Providing photonic control over wafer borne semiconductor devices 有权
    提供晶圆传导半导体器件的光子控制

    公开(公告)号:US07662650B2

    公开(公告)日:2010-02-16

    申请号:US10486666

    申请日:2002-08-12

    IPC分类号: H01L21/66 H01L21/00 G01R31/26

    摘要: Disclosed are methods for providing wafer photonic flow control to a semiconductor wafer (1700) having a substrate (1720), at least one active layer (1765) and at least one surface layer (1710). Photonic flow control can be achieved through the formation of trenches (1725) and/or insulating implants (1730) formed in said wafer (1700), whereby active regions (1760) are defined by trenches (1725) that operate as nonconductive areas (1750). Methods of and systems for wafer level burn-in (WLBI) of semiconductor devices are also disclosed. Photonic flow control at the wafer level is important when using WLBI methods and systems.

    摘要翻译: 公开了用于向具有衬底(1720),至少一个有源层(1765)和至少一个表面层(1710)的半导体晶片(1700)提供晶片光子流控制的方法。 可以通过形成在所述晶片(1700)中形成的沟槽(1725)和/或绝缘植入物(1730)来实现光子流控制,由此有源区域(1760)由作为非导电区域(1750)的沟槽(1725)限定 )。 还公开了半导体器件的晶片级老化(WLBI)的方法和系统。 使用WLBI方法和系统时,晶圆级的光子流量控制很重要。

    Optical apertures for reducing spontaneous emissions in photodiodes
    18.
    发明授权
    Optical apertures for reducing spontaneous emissions in photodiodes 有权
    用于减少光电二极管自发辐射的光学孔

    公开(公告)号:US07418021B2

    公开(公告)日:2008-08-26

    申请号:US11026355

    申请日:2004-12-30

    IPC分类号: H01S5/00

    摘要: An optical structure that reduces the effects of spontaneous emissions from the active region of a laser. An optical structure includes optimizations to reduce the effects of spontaneous emissions. The optical structure includes a VCSEL with top and bottom DBR mirrors and an active region connected to the mirrors. The optical structure further includes a photodiode connected to the VCSEL. One or more optimizations may be included in the optical structure including optically absorbing materials, varying the geometry of the structure to change reflective angles, using optical apertures, changing the reflectivity of one or more mirrors, changing the photodiode to be more impervious to spontaneous emissions, and using ion implants to reduce photoluminescence efficiency.

    摘要翻译: 一种降低激光器有源区自发发射效应的光学结构。 光学结构包括优化以减少自发辐射的影响。 光学结构包括具有顶部和底部DBR反射镜的VCSEL和连接到反射镜的有源区域。 光学结构还包括连接到VCSEL的光电二极管。 可以在光学结构中包括一个或多个优化,包括光学吸收材料,改变结构的几何形状以改变反射角度,使用光学孔径,改变一个或多个反射镜的反射率,将光电二极管改变为对自发辐射更为不透明 ,并使用离子注入来降低光致发光效率。

    Metamorphic long wavelength high-speed photodiode

    公开(公告)号:US06558973B2

    公开(公告)日:2003-05-06

    申请号:US09766797

    申请日:2001-01-22

    IPC分类号: H01L2100

    摘要: A method and apparatus for fabricating a metamorphic long-wavelength, high-speed photodiode, wherein a buffer layer matching a substrate lattice constant is formed at normal growth temperatures and a thin grading region which grades past the desired lattice constant is configured at a low temperature. A reverse grade back is performed to match a desired lattice constant. Thereafter, a thick layer is formed thereon, based on the desired lattice constant. Annealing can then occur to isolate dislocated material in a grading layer and a reverse grading layer. Thereon a strained layer superlattice substrate is created upon which a high-speed photodiode can be formed. Implant or diffusion layers grown in dopants can be formed based on materials, such as Be, Mg, C, Te, Si, Se, Zn, or others. A metal layer can be formed over a cap above a P+ region situated directly over an N-active region. The active region also includes a p-doped region. The high-speed photodiode can thus be formed utilizing GaAs, or other substrate material, such as germanium and silicon.

    Turbidity sensor with the capability of regulating the intensity of a
light source
    20.
    发明授权
    Turbidity sensor with the capability of regulating the intensity of a light source 失效
    浊度传感器具有调节光源强度的能力

    公开(公告)号:US5589935A

    公开(公告)日:1996-12-31

    申请号:US452607

    申请日:1995-05-25

    申请人: James R. Biard

    发明人: James R. Biard

    摘要: A turbidity sensor is provided with two light sensitive components or elements. One light sensitive component is displaced from a light source, such as a light emitting diode, so that a fluid can pass therebetween. A second light sensitive component is disposed within a common compartment with the light source so that it can measure the intensity of light provided by the light source. The light source and the second light sensitive components can be individual elements, or chips, within a common component package. A regulator is provided to control the magnitude of current provided to the light source so that its light intensity can be regulated. In this manner, the intensity of light emitted by the light source, such as a light emitting diode, can be controlled regardless of the aging of the LED, the variability of LED characteristics and the temperature surrounding the LED. The constant light emission from the light source permits the other light sensitive component to be used as a reliable indication of the turbidity of a solution passing between the light source and the first light sensitive component.

    摘要翻译: 浊度传感器具有两个光敏元件或元件。 一个光敏元件从诸如发光二极管的光源移位,使得流体可以在其间通过。 第二光敏部件设置在具有光源的公共隔间内,使得其可以测量由光源提供的光的强度。 光源和第二光敏部件可以是公共部件封装内的单个元件或芯片。 提供调节器以控制提供给光源的电流的大小,使得其光强度可以被调节。 以这种方式,可以控制由诸如发光二极管的光源发射的光的强度,而不管LED的老化,LED特性的变化以及LED周围的温度。 来自光源的恒定光发射允许另一个光敏部件被用作通过光源和第一光敏部件之间的溶液的浊度的可靠指示。