Turbo vacuum pump
    2.
    发明授权
    Turbo vacuum pump 有权
    涡轮真空泵

    公开(公告)号:US08109744B2

    公开(公告)日:2012-02-07

    申请号:US12410780

    申请日:2009-03-25

    IPC分类号: F04B37/14 F04B37/10

    摘要: An oil-free turbo vacuum pump is capable of evacuating gas in a chamber from atmospheric pressure to high vacuum. The turbo vacuum pump includes a pumping section having rotor blades and stator blades which are disposed alternately in a casing, a main shaft for supporting the rotor blades, and a bearing and motor section having a motor for rotating the main shaft and a bearing mechanism for supporting the main shaft rotatably. A gas bearing is used as a bearing for supporting the main shaft in a thrust direction, spiral grooves are formed in both surfaces of a stationary part of the gas bearing, and the stationary part having the spiral grooves is placed between an upper rotating part and a lower rotating part which are fixed to the main shaft.

    摘要翻译: 无油涡轮真空泵能够将室内的气体从大气压降至高真空。 涡轮真空泵包括具有交替设置在壳体中的转子叶片和定子叶片的泵送部分,用于支撑转子叶片的主轴以及具有用于使主轴旋转的马达的轴承和马达部分以及用于 可旋转地支撑主轴。 气体轴承用作用于沿推力方向支撑主轴的轴承,在气体轴承的静止部分的两个表面上形成螺旋槽,并且具有螺旋槽的固定部分设置在上部旋转部分和 固定在主轴上的下部旋转部。

    Turbo-molecular pump
    3.
    发明授权
    Turbo-molecular pump 有权
    涡轮分子泵

    公开(公告)号:US06343910B1

    公开(公告)日:2002-02-05

    申请号:US09531894

    申请日:2000-03-21

    IPC分类号: F01D136

    摘要: A turbo-molecular pump has a casing, a stator fixedly mounted in the casing, and a rotor supported in the casing for rotation relatively to the stator. A turbine blade pumping assembly and a thread groove pumping assembly for discharging gas molecules are disposed between the stator and the rotor. The rotor comprises at least two components constituting the turbine blade pumping assembly and the thread groove pumping assembly. The components are separable from each other at a predetermined position, and joined to each other to form the rotor.

    摘要翻译: 涡轮分子泵具有壳体,固定地安装在壳体中的定子和支撑在壳体中以相对于定子旋转的转子。 涡轮叶片泵送组件和用于排放气体分子的螺纹槽泵送组件设置在定子和转子之间。 转子包括构成涡轮机叶片泵送组件和螺纹槽泵送组件的至少两个部件。 这些部件在预定位置彼此分离,并且彼此接合以形成转子。

    Vacuum exhaust system
    4.
    发明授权
    Vacuum exhaust system 失效
    真空排气系统

    公开(公告)号:US06382249B1

    公开(公告)日:2002-05-07

    申请号:US09671745

    申请日:2000-09-29

    IPC分类号: C23C1600

    摘要: A vacuum exhaust system comprising a vacuum chamber; means for introducing a gas into the vacuum chamber; a main pump for exhausting the vacuum chamber and reducing a pressure of the vacuum chamber to a desired pressure; an auxiliary pump disposed downstream from the main pump; and piping for connecting them, wherein an outer diameter of connecting piping as a connection between the main pump and the auxiliary pump is ½ inch (12.7 mm) or less; and a length of the connecting piping and capability of the auxiliary pump are combined so that a back pressure of the main pump becomes 5 Torr or more. This vacuum exhaust system can realize cost reduction through a saving in entire space, simplification of piping construction work, and so on.

    摘要翻译: 一种真空排气系统,包括一个真空室; 用于将气体引入真空室的装置; 用于排出真空室并将真空室的压力降低到所需压力的主泵; 辅助泵设置在主泵的下游; 和用于连接它们的管道,其中作为主泵和辅助泵之间的连接的连接管的外径为1/2英寸(12.7mm)或更小; 并且连接管道的长度和辅助泵的能力被组合,使得主泵的背压变为5托或更大。 该真空排气系统可以通过节省整个空间实现成本降低,简化管道施工工作等。

    Turbo-molecular pump
    5.
    发明授权

    公开(公告)号:US06585480B2

    公开(公告)日:2003-07-01

    申请号:US10035145

    申请日:2002-01-04

    IPC分类号: F01D136

    摘要: A turbo-molecular pump has a casing, a stator fixedly mounted in the casing, and a rotor supported in the casing for rotation relatively to the stator. A turbine blade pumping assembly and a thread groove pumping assembly for discharging gas molecules are disposed between the stator and the rotor. The rotor comprises at least two components constituting the turbine blade pumping assembly and the thread groove pumping assembly. The components are separable from each other at a predetermined position, and joined to each other to form the rotor.

    ELECTRON BEAM APPARATUS
    10.
    发明申请
    ELECTRON BEAM APPARATUS 有权
    电子束设备

    公开(公告)号:US20090218506A1

    公开(公告)日:2009-09-03

    申请号:US11996701

    申请日:2006-07-24

    IPC分类号: H01J1/50 A61N5/00 H01J3/14

    摘要: An electron beam emitted from an electron gun (G) forms a reduced image on a sample (S) through a non-dispersion Wien-filter (5-1), an electromagnetic deflector (11-1), a beam separator (12-1), and a tablet lens (17-1) as an objective lens. The beam separator (12-1) is configured such that a distance by which a secondary electron beam passes through the beam separator is approximately three times longer than a distance by which a primary electron beam passes through the beam separator. Therefore, even if a magnetic field in the beam separator is set to deflect the primary electron beam by a small angle equal to or less than approximately 10 degrees, the secondary electron beam can be deflected by approximately 30 degrees, so that the primary and secondary electron beams are sufficiently separated. Also, since the primary electron beam is deflected by a small angle, less aberration occurs in the primary electron beam. Accordingly, since a light path length of a primary electro-optical system, it is possible to reduce the influence of space charge and the occurrence of deflection aberration.

    摘要翻译: 从电子枪(G)发射的电子束通过非分散维恩滤波器(5-1),电磁偏转器(11-1),光束分离器(12- 1)和作为物镜的平板电脑镜头(17-1)。 束分离器(12-1)被构造成使得二次电子束通过分束器的距离比一次电子束通过分束器的距离大约三倍。 因此,即使将分束器中的磁场设定为使一次电子束偏转等于或小于约10度的小角度,二次电子束可以偏转大约30度,使得初级和次级 电子束充分分离。 此外,由于一次电子束以小角度偏转,所以在一次电子束中产生较小的像差。 因此,由于一次电光学系统的光路长度,可以减小空间电荷的影响和偏转像差的发生。