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    MEMORY ACCESS DEVICE
    1.
    发明公开
    MEMORY ACCESS DEVICE 审中-公开

    公开(公告)号：EP2685422A4

    公开(公告)日：2018-07-11

    申请号：EP11860333

    申请日：2011-03-10

    Applicant: NTT ELECTRONICS CORP

    Inventor： YAMADA YASUHIRO ,  NAGAI NORIHIKO

    IPC: G06T1/60 ,  G06F12/02 ,  G06F12/10 ,  G06F13/28

    CPC classification number: G09G5/393 ,  G06F13/16 ,  G06F13/28 ,  G06T1/60 ,  H04N19/423 ,  H04N19/46 ,  H04N19/523

    Abstract: A first look-up table (10) outputs a result of dividing a horizontal component of a pixel address in the block by number of pixels in a horizontal component of the cell. A second look-up table (12) outputs a result of dividing a vertical component of a pixel address in the block by number of pixels in a vertical component of the cell. A third look-up table (14) outputs a residue as a result of dividing a horizontal component of a pixel address in the block by number of pixels in a horizontal component of the cell. A fourth look-up table (16) outputs a residue as a result of dividing a vertical component of a pixel address in the block by number of pixels in a vertical component of the cell. The output values of the first and second look-up tables (10, 12) are addresses of the cell for burst access to the memory. The output values of the third and fourth look-up tables (14, 16) are used as pixel addresses in the cell.

    AVALANCHE PHOTODIODE
    2.
    发明公开
    AVALANCHE PHOTODIODE 审中-公开

    公开(公告)号：EP2613366A4

    公开(公告)日：2018-02-14

    申请号：EP11821912

    申请日：2011-09-01

    Applicant: NTT ELECTRONICS CORP ,  NIPPON TELEGRAPH & TELEPHONE

    Inventor： ISHIBASHI TADAO ,  ANDO SEIGO ,  NADA MASAHIRO ,  MURAMOTO YOSHIFUMI ,  YOKOYAMA HARUKI

    IPC: H01L31/107 ,  H01L31/0304 ,  H01L31/0352

    CPC classification number: H01L31/02002 ,  H01L31/022416 ,  H01L31/03046 ,  H01L31/035281 ,  H01L31/1075

    Abstract: This invention provides an APD which can reduce a dark current derived from a mesa surface. An APD 301 is provided with the semi-insulating substrate 1, a first mesa 101 having a first laminate constitution in which a p-type electrode layer 2, a p-type light absorbing layer 3A, a light absorbing layer 3B with a low impurity concentration, a band gap inclined layer 4, a p-type electric field control layer 5, an avalanche multiplier layer 6, an n-type electric field control layer 7A, and an electron transit layer 7B with a low impurity concentration are stacked in this order on a surface of the semi-insulating substrate 1, a second mesa 102 having an outer circumference provided inside an outer circumference of the first mesa 101 as viewed from the laminating direction and having a second laminate constitution in which an n-type electrode buffer layer 8A and an n-type electrode layer 8B are stacked in this order on a surface on the electron transit layer 7B side, and a depletion control region 11 that is provided in layers on the second mesa 102 side relative to the p-type electric field control layer 5, formed in an encircling portion 14 provided inside an outer circumference of the first mesa 101 and encircling an outer circumference of the second mesa 102, and prevents the encircling portion of the p-type electric field control layer 5 from being depleted when bias is applied.

    PHOTODIODE
    5.
    发明公开
    PHOTODIODE 审中-公开
    发光二极管

    公开(公告)号：EP2916362A4

    公开(公告)日：2016-06-22

    申请号：EP13851361

    申请日：2013-10-04

    Applicant: NTT ELECTRONICS CORP

    Inventor： ISHIBASHI TADAO ,  ITOH HIROKI ,  SHIMIZU MAKOTO

    IPC: H01L31/10 ,  H01L31/0304 ,  H01L31/105

    CPC classification number: H01L31/105 ,  H01L31/02164 ,  H01L31/0224 ,  H01L31/03046 ,  Y02E10/544

    Abstract: Photodiode is suggested that can provide a THz operation with a stable output. A photodiode having a pin-type semiconductor structure, comprising: a semiconductor layer structure obtained by sequentially layering an n-type contact layer, a low concentration layer, and a p-type contact layer; and an n electrode and a p electrode connected to the n-type contact layer and the p-type contact layer, respectively and, during the operation, the low concentration layer is depleted, wherein: the low concentration layer is obtained by layering an electron drift layer, a light absorption layer, and a hole drift layer while being abutted to the n-type contact layer. Preferably, the electron drift layer and the hole drift layer do not function as a light absorption layer and, the thickness of the electron drift layer and the thickness of the hole drift layer are changed to thereby adjust required light and response characteristic. The light absorption layer has a field strength set to be relatively higher than the field strength of at least one of the electron drift layer and the hole drift layer. The electron drift layer is subjected to n-type doping and the hole drift layer is subjected to p-type doping.

    LENS HOLDER, LENS OPTICAL ASSEMBLY COMPONENT, AND PACKAGE WHEREIN LENS OPTICAL ASSEMBLY COMPONENT IS MOUNTED
    6.
    发明公开
    LENS HOLDER, LENS OPTICAL ASSEMBLY COMPONENT, AND PACKAGE WHEREIN LENS OPTICAL ASSEMBLY COMPONENT IS MOUNTED 有权
    镜头支架，光学镜片的结构单元和有安装在其中部件包装的光学透镜的结构

    公开(公告)号：EP2871506A4

    公开(公告)日：2016-02-24

    申请号：EP13813792

    申请日：2013-07-01

    Applicant: NIPPON TELEGRAPH & TELEPHONE ,  NTT ELECTRONICS CORP

    Inventor： TSUZUKI KEN ,  NISHIZAWA TOSHIKI ,  MITSUHASHI YUJI

    IPC: G02B7/02 ,  B23K26/20 ,  G02B6/32 ,  G02B6/42 ,  G02B7/00 ,  H01L31/0232 ,  H01S5/022

    CPC classification number: G02B7/02 ,  B23K26/21 ,  B23K33/00 ,  G02B6/4204 ,  G02B6/4237 ,  G02B6/4244 ,  H01L31/02325 ,  H01S5/02288

    Abstract: Provided is a lens holder, a lens optical component, or a package equipped with the lens optical component, in which poor welding between a lens housing and the lens holder may not occur. A lens holder includes a pair of leg members inclined and extending to a lens housing from a support member that supports the lens holder at a predetermined position. A distance between pair of leg members is set such that the distance between lower end portions is equal to or larger than a width of the lens housing to be supported, and the distance between upper end portions is equal to or smaller than the width of the lens housing to be supported, and that the distance becomes gradually smaller from the lower end portions to the upper end portions of the legs. A lens optical component includes a lens housing holding a lens, and the lens holder. The pair of leg members at the upper end portions are in contact with the lens housing, and welded at portions in contact with the lens housing. A package is equipped with the lens optical component and two or more optical components. The lens optical component is inserted in an optical path of the two or more optical components, and the height of the lens holder is set to be equal to a height of the input-output portion of an optical device.

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