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    Apparatus for forming silicon carbide filaments
    1.
    发明授权
    Apparatus for forming silicon carbide filaments 失效
    形成硅碳膜的装置

    公开(公告)号：US3658680A

    公开(公告)日：1972-04-25

    申请号：US3658680D

    申请日：1969-08-22

    Applicant: THOMSON CSF

    Inventor： COMBE CHRISTIAN ,  CLOUET ANDRE ,  MARCHAL MICHEL ,  VILLARD MICHEL ,  GRENIER PIERRE

    IPC: C01B31/36 ,  C23C16/32 ,  C23C16/54 ,  C23C16/56 ,  B01K3/00 ,  B01K1/00 ,  C23B3/06

    CPC classification number: B82Y30/00 ,  C01B32/956 ,  C01P2002/60 ,  C01P2004/10 ,  C01P2004/64 ,  C01P2006/90 ,  C23C16/325 ,  C23C16/545 ,  C23C16/56

    Abstract: Apparatus to form silicon carbide filaments which are essentially uniform throughout their cross-section, which includes a reaction chamber, a thermal screen surrounding the reaction chamber to equalize the temperature therein, a thermal gradient oven concentric with the thermal screen and surrounding the chamber, and a plurality of thermocouples located in the chamber and sensing temperature, and controlling the oven to provide for essentially uniform temperature distribution within the oven, the chamber having inlet means for the admission of organosilane so that conversion of heated tungsten to tungsten carbide is carried out essentially at uniform temperatures throughout the entire chamber; an electrolytic cell follows the chamber in the path of the filament.

    Abstract translation: 用于形成在其横截面上基本均匀的碳化硅长丝的装置，其包括反应室，围绕反应室的热屏以使其中的温度相等，与热筛同心并围绕室的热梯度炉，以及 多个热电偶位于室中并感测温度，并且控制炉以提供烘箱内的基本均匀的温度分布，该室具有用于进入有机硅烷的入口装置，使得加热的钨转化为碳化钨基本上 在整个室内均匀温度; 电解池在灯丝的路径中跟随室。

    5.
    发明专利
    未知

    公开(公告)号：FR2557371A1

    公开(公告)日：1985-06-28

    申请号：FR8320842

    申请日：1983-12-27

    Applicant: THOMSON CSF

    Inventor： HENRY YVES ,  NICOLLET ANDRE ,  REBOUL JEAN-PHILIPPE ,  VILLARD MICHEL

    IPC: H01L27/14 ,  H01L27/144 ,  G01T1/24 ,  H01L27/146 ,  H01L31/0216 ,  H04N5/335 ,  H01L31/02 ,  H01L31/18

    Abstract: The surface of a substrate which includes a plurality of photovoltaic junctions spaced along it is prepared as follows: a first anodic oxide layer is formed to cover the whole surface of the substrate and ensures perfect control of the photovoltaic junctions, a second layer is deposited of metal which is impervious to the radiation to be detected, then through photolithography, only the zones of the second layer that it is desired to render impervious to the radiation to be detected are maintained and the remainder removed; and finally, a layer of dielectric material is deposited to cover the whole surface.

    6.
    发明专利
    未知

    公开(公告)号：FR2557371B1

    公开(公告)日：1987-01-16

    申请号：FR8320842

    申请日：1983-12-27

    Applicant: THOMSON CSF

    Inventor： HENRY YVES ,  NICOLLET ANDRE ,  REBOUL JEAN-PHILIPPE ,  VILLARD MICHEL

    IPC: H01L27/14 ,  H01L27/144 ,  G01T1/24 ,  H01L27/146 ,  H01L31/0216 ,  H04N5/335 ,  H01L31/02 ,  H01L31/18

    Abstract: The surface of a substrate which includes a plurality of photovoltaic junctions spaced along it is prepared as follows: a first anodic oxide layer is formed to cover the whole surface of the substrate and ensures perfect control of the photovoltaic junctions, a second layer is deposited of metal which is impervious to the radiation to be detected, then through photolithography, only the zones of the second layer that it is desired to render impervious to the radiation to be detected are maintained and the remainder removed; and finally, a layer of dielectric material is deposited to cover the whole surface.

    PROCESS FOR THE MANUFACTURE OF OPTICAL FIBERS WITH A RADIAL REFRACTIVE INDEX
    8.
    发明专利
    PROCESS FOR THE MANUFACTURE OF OPTICAL FIBERS WITH A RADIAL REFRACTIVE INDEX 未知

    公开(公告)号：CA1101216A

    公开(公告)日：1981-05-19

    申请号：CA288970

    申请日：1977-10-18

    Applicant: THOMSON CSF

    Inventor： DE PANAFIEU ARMAND ,  VILLARD MICHEL ,  BAYLAC CHRISTIANE ,  FAURE MICHEL

    IPC: C03B37/014 ,  C03B8/00 ,  C03B25/00 ,  C03B37/016 ,  C03C3/064 ,  C03C3/089 ,  C03C3/091 ,  C03C11/00 ,  C03C13/04 ,  C03C23/00 ,  G02B6/00 ,  C03B37/02

    Abstract: A PROCESS FOR THE MANUFACTURE OF OPTICAL FIBERS WITH A RADIAL REFRACTIVE INDEX of the disclosure A process yielding a glass blank in the form of a rod intended for drawing an optical fiber of the kind of selffocussing fiber i.e. having a radial refractive index gradient, having features (substantially transparency or transmission efficiency) lower than those of the fibers intended for long distance communication but sufficient for middle distance transmission, and which exhibits a lower cost than known processes. In a first stage a phase separation yields a "hard" phase (rich in silicon) and a "soft" phase (poor in silicon and rich in impurities) due to the drawing of a rod from a bath of molten glass through a cooling system having a strong temperature gradient and creating a radial refractive index gradient. In a second stage the soft phase is leached, eliminating the impurities contained in the soft phase but keeping safe the radial gradient. In a third stage a consolidation treatment is a pure annealing treatment rendering the hard phase more homogeneous.

    10.
    发明专利
    未知

    公开(公告)号：FR2368444A1

    公开(公告)日：1978-05-19

    申请号：FR7631355

    申请日：1976-10-19

    Applicant: THOMSON CSF

    Inventor： PANAFIEU ARNAUD DE ,  VILLARD MICHEL ,  BAYLAC CHRISTIANE ,  FAURE MICHEL

    IPC: C03B37/014 ,  C03B8/00 ,  C03B25/00 ,  C03B37/016 ,  C03C3/064 ,  C03C3/089 ,  C03C3/091 ,  C03C11/00 ,  C03C13/04 ,  C03C23/00 ,  G02B6/00 ,  C03B37/02 ,  C03B32/00 ,  C03C3/08 ,  G02B5/14 ,  H04B9/00

    Abstract: A process yielding a glass blank in the form of a rod intended for drawing an optical fiber of the kind of self-focussing fiber i.e. having a radial refractive index gradient, having features (substantially transparency or transmission efficiency) lower than those of the fibers intended for long distance communication but sufficient for middle distance transmission, and which exhibits a lower cost than known processes. In a first stage a phase separation yields a "hard" phase (rich in silicon) and a "soft" phase (poor in silicon and rich in impurities) due to the drawing of a rod from a bath of molten glass through a cooling system having a strong temperature gradient and creating a radial refractive index gradient. In a second stage the soft phase is leached, eliminating the impurities contained in the soft phase but keeping safe the radial gradient. In a third stage a consolidation treatment is a pure annealing treatment rendering the hard phase more homogeneous.

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