Method of manufacturing nitride semiconductor substrate
    2.
    发明公开
    Method of manufacturing nitride semiconductor substrate 审中-公开
    赫尔斯特朗·赫斯特伦

    公开(公告)号:EP1244140A2

    公开(公告)日:2002-09-25

    申请号:EP02006408.5

    申请日:2002-03-21

    IPC分类号: H01L21/20

    摘要: A mask film of a material on which substantially no nitride semiconductor grows and having a plurality of openings in a stripe shape is formed on a main surface of a base substrate. Then, on the base substrate, a semiconductor layer of nitride is selectively grown through the mask film. Then, a laser beam is irradiated upon the interface between the semiconductor layer and the base substrate to separate the semiconductor layer from the base substrate, so that a nitride semiconductor substrate is formed from the semiconductor layer.

    摘要翻译: 在基底基板的主表面上形成有基本上没有氮化物半导体生长并具有多个条形开口的材料的掩模膜。 然后,在基底基板上,选择性地通过掩模膜生长氮化物半导体层。 然后,将激光束照射在半导体层和基底基板之间的界面上,以将半导体层与基底基板分离,从而从半导体层形成氮化物半导体衬底。

    Semiconductor laser array
    4.
    发明公开
    Semiconductor laser array 审中-公开
    多个半导体激光

    公开(公告)号:EP1143584A2

    公开(公告)日:2001-10-10

    申请号:EP01303053.1

    申请日:2001-03-30

    IPC分类号: H01S5/40 H01S5/02 A61B18/20

    摘要: To provide a semiconductor laser device that is capable of outputting high power laser light and is suitable for optical recording, optical communication, welding, and the like, and a multiple wavelength laser light emitting apparatus employing the semiconductor laser device. The semiconductor laser device includes an optical element that at least partially reflects a laser beam emitted from an end face of a laser light oscillator in a semiconductor laser array element so that the laser beam is incident on another laser light oscillator. Due to this, even when laser light oscillators are disposed with such a pitch that does not pose problems in manufacturing, a laser beam emitted from an end face of one laser light oscillator and a laser beam emitted from an end face of another laser light oscillator are phase-locked. By condensing these laser beams, the semiconductor laser device can output higher power laser light than conventional.

    Semiconductor laser device
    7.
    发明公开
    Semiconductor laser device 审中-公开
    半导体激光装置

    公开(公告)号:EP1195864A3

    公开(公告)日:2004-11-10

    申请号:EP01123682.5

    申请日:2001-10-02

    IPC分类号: H01S5/20 H01S5/323

    摘要: A semiconductor laser device comprises, on top of an active layer, an n-type cladding layer of Al x1 Ga 1-x1 As and a p-type cladding layer of (Al x Ga 1-x ) y In 1-y P for defining a barrier height. The p-type cladding layer for defining a barrier height contains more component elements than the n-type cladding layer. The potential difference between the conduction band edges of the p-type cladding layer for defining a barrier height and the active layer is greater than the potential difference between the conduction band edges of the n-type cladding layer and the active layer. The carriers in the active layer are prevented from overflowing into the p-type cladding layer and a material having a high thermal conductivity is used for the n-type cladding layer to prevent the phenomenon of thermal saturation, thereby providing improved optical output.

    摘要翻译: 半导体激光装置在有源层的顶部包括用于限定势垒高度的Alx1Ga1-x1As的n型包覆层和(AlxGa1-x)yIn1-yP的p型包覆层。 用于限定势垒高度的p型覆层包含比n型覆层更多的组分元素。 用于限定势垒高度的p型包覆层的导带边缘与有源层之间的电势差大于n型包覆层和有源层的导带边缘之间的电势差。 防止有源层中的载流子溢出到p型覆层中,并且将具有高热导率的材料用于n型覆层以防止热饱和现象,由此提供改善的光输出。

    Optical pick-up and information recording and reproducing apparatus
    9.
    发明公开
    Optical pick-up and information recording and reproducing apparatus 审中-公开
    OptischeAbtastgerätundAufzeichnungsgerätund Wiedergabe von信息

    公开(公告)号:EP1160776A2

    公开(公告)日:2001-12-05

    申请号:EP01113040.8

    申请日:2001-05-29

    IPC分类号: G11B7/12

    摘要: An optical-pick up preventing the deterioration of the optical property by mounting the entire optical system on the movable portion and aligning the optical axis of the semiconductor laser element having the shortest wavelength with the center of the optical axis of the objective lens and an information recording and reproducing apparatus on which the optical pick-up is mounted. The optical pick-up includes a movable portion 6 on which at least a plurality of semiconductor laser elements 2 irradiating an optical recording medium 12 with laser beams and an objective lens 1 converging laser beams emerged from the semiconductor laser element are mounted, a fixed portion 7 supporting the movable portion 6, and a supporting component 8 connecting the movable portion 6 to the fixed portion 7 so that the movable portion 6 is rockable in a focus direction and a tracking direction of the optical recording medium 12; wherein at least two of the plurality of semiconductor laser elements 2 have a different lasing wavelength from each other and an optical axis of the semiconductor laser element having the shortest wavelength is aligned with the center of the optical axis of the objective lens 1. Thereby, it is possible to prevent the optical displacement in the optical system when the position of the objective lens is changed.

    摘要翻译: 通过将整个光学系统安装在可动部分上并将具有最短波长的半导体激光元件的光轴与物镜的光轴的中心对准的光学特性和信息 记录和再现装置,其上安装有光学拾取器。 光学拾取器包括可动部分6,其中至少多个激光束照射光记录介质12的半导体激光元件2和从半导体激光元件出射会聚激光束的物镜1安装在固定部分6上 支撑可动部分6的支撑部件8和将可动部分6连接到固定部分7的支撑部件8,使得可移动部分6能够在光学记录介质12的聚焦方向和跟踪方向上摆动; 其中,所述多个半导体激光元件2中的至少两个具有彼此不同的激光波长,并且具有最短波长的半导体激光元件的光轴与物镜1的光轴的中心对准。由此, 当物镜的位置改变时,可以防止光学系统中的光学位移。