VAKUUM-DRUCKMESSVORRICHTUNG FÜR EINEN RTP-VAKUUMOFEN
    4.
    发明公开
    VAKUUM-DRUCKMESSVORRICHTUNG FÜR EINEN RTP-VAKUUMOFEN 审中-公开
    真空压力测量装置FOR A RTP真空烘箱

    公开(公告)号:EP2288894A1

    公开(公告)日:2011-03-02

    申请号:EP09745456.5

    申请日:2009-05-13

    IPC分类号: G01L21/12 H01L31/18

    摘要: In order to efficiently produce especially semiconducting chalcogenide layers for use in CIS solar cells, a reaction box is inserted into the reaction chamber of a rapid thermal processing (RTP) vacuum furnace. The quality of the layer to be produced is regulated with the help of the process pressure (P
    P ) which is determined
    in situ by optically measuring the deflection of a membrane in the reaction box, said membrane being used as a pressure sensor. However, said measurement is erroneous because of the large temperature variations during RTP and can be used only with a membrane having a certain minimum size. According to the invention, a separate pressure measuring unit (08) is provided outside the RTP vacuum furnace (05). Said pressure measuring unit (08) can be gas-tightly connected to the reaction box (02) via a supply pipe (11) and comprises a measuring chamber (09) and a pressure sensor (10), preferably a Pirani-type thermal conductivity gauge (15). At least the supply pipe (11) is kept, by means of a heating device (12), at a constant temperature (T
    A ) that is thermally disconnected from the RTP, lies below the process temperature (T
    P ) but above the condensation temperature (T
    K ) of the process gas, and is transferred to the process gas as the measured temperature (T
    M ) when the process gas penetrates into the pressure measuring unit (08).

    MICRO VACUUM GAUGE
    5.
    发明公开
    MICRO VACUUM GAUGE 审中-公开
    MIKROVAKUUMMESSGERÄT

    公开(公告)号:EP2237009A1

    公开(公告)日:2010-10-06

    申请号:EP09705829.1

    申请日:2009-01-30

    发明人: KIMATA, Masafumi

    IPC分类号: G01L21/12

    CPC分类号: G01L21/12

    摘要: A micro vacuum gauge includes a substrate, a floating structure that is held above the substrate by a supporting structure extending from the substrate in a state where the floating structure is thermally isolated from the substrate, a heat generator that is arranged in the floating structure to generate heat, and a temperature sensor that is arranged in the floating structure to measure a difference in temperature between the substrate and the floating structure. A second member having a lower emissivity than a first member surrounding the heat generator and the temperature sensor is formed at least on a surface of the floating structure by being joined to the first member.

    摘要翻译: 微型真空计包括衬底,浮动结构,其通过在浮动结构与衬底热隔离的状态下从衬底延伸的支撑结构保持在衬底上;散热结构,布置在浮动结构中 产生热量,以及布置在浮动结构中以测量衬底和浮动结构之间的温度差的温度传感器。 通过与第一构件接合,至少在浮动结构的表面上形成具有低于围绕发热体的第一构件和温度传感器的较低的发射率的第二构件。

    THERMAL CONDUCTIVITY GAUGE
    10.
    发明公开

    公开(公告)号:EP4016034A1

    公开(公告)日:2022-06-22

    申请号:EP22156549.2

    申请日:2019-02-25

    IPC分类号: G01L21/12

    摘要: A thermal conductivity gauge measures gas pressure within a chamber. A sensor wire and a resistor form a circuit coupled between a power input and ground, where the sensor wire extends into the chamber and connects to the resistor via a terminal. A controller adjusts the power input, as a function of a voltage at the terminal and a voltage at the power input, to bring the sensor wire to a target temperature. Based on the adjusted power input, the controller can determine a measure of the gas pressure within the chamber.