Abstract:
An ionization gauge includes an electron generator array that includes a microchannel plate that includes an electron generating portion of the microchannel plate comprising a source for generating seed electrons and an electron multiplier portion of the microchannel plate, responsive to the seed electrons generated by the electron generating portion, that multiplies the electrons. The ionization gauge includes an ionization volume in which the electrons impact a gaseous species, and a collector electrode for collecting ions formed by the impact between the electrons and gas species. The collector electrode can be surrounded by the anode, or the ionization gauge can be formed with multiple collector electrodes. The source of electrons can provide for a spontaneous emission of electrons, where the electrons are multiplied in a cascade.
Abstract:
Eine Ionisations-Vakuummesszelle (10) umfasst ein evakuierbares Gehäuse (12) mit einem Messanschluss für ein zu messendes Vakuum an einem Endabschnitt, eine Messkammer (14) im Gehäuse (12), die mit dem Messanschluss in Fluidverbindung steht, wobei die Messkammer (14) als austauschbares Bauteil ausgebildet ist, und eine erste und eine zweite Elektrode (16, 18) in der Messkammer (14), die im Wesentlichen koaxial bezüglich einer Achse und voneinander beabstandet angeordnet sind. Ferner umfasst sind eine elektrisch isolierende und vakuumdichte Durchführung (20) für eine elektrische Zuführung zur zweiten Elektrode (18), und eine Magnetisierungsanordnung, welche ausgebildet ist, im Ionisationsraum ein Magnetfeld zu erzeugen. Erfindungsgemäss umfasst die Messkammer (14), insbesondere mindestens eine der Elektroden (16, 18) ein magnetisches Material.
Abstract:
A gauge head (10) for an ionisation vacuum gauge includes an electrical device (12, 28, 54) operable to provide an electrical discharge in a gas whose pressure is to be measured to initiate ion discharge in the gas.
Abstract:
본 발명은 반도체 소자를 제조하기 위한 이온 주입 장치로, 이온 주입 장치는 이온소스부에서 생성된 이온들 중 웨이퍼에 주입할 이온만을 선별하는 분류기, 상기 분류기의 진공을 형성하기 위한 진공장치, 상기 분류기의 진공도를 측정하는 측정기, 그리고 상기 분류기에서 발생되는 자기장에 의해 상기 측정기가 영향을 받는 것을 최소화하는 차폐기를 구비한다. 본 발명에서 상기 차폐기는 상기 측정기의 둘레를 감싸는 복수의 차폐판들과 상기 복수의 차폐판들 사이에 삽입되는 유전체를 구비한다. 본 발명인 이온 주입 장치에 의하면 상기 측정기인 콜드 캐소드 이온 게이지의 둘레에 차폐기를 구비하므로, 상기 콜드 캐소드 이온 게이지 내부에 형성된 자기장이 분류기에서 발생된 자기장에 의해 영향을 받는 것을 최소화할 수 있어, 상기 분류기 내의 진공도를 정확하게 측정할 수 있는 효과가 있다.
Abstract:
A cold cathode ionization gauge includes multiple cathodes providing different spacings between the cathodes and an anode. The multiple cathodes allow for pressure measurements over wider ranges of pressure. A first cathode with a larger spacing may provide current based on Townsend discharge; whereas, a second cathode having a smaller spacing may provide current based on both Townsend discharge at higher pressures and on Paschen's Law discharge at still higher pressures. A feature on the second cathode may support Paschen's Law discharge. Large resistances between the cathodes and a return to power supply enable control of output profiles to extend the pressure ranges with accurate responses and avoid output minima. Pressure measurements may be made based on currents from respective cathodes dependent on the outputs of the cathodes through the wide pressure range of measurement. The multiple cathodes may also provide measurements that avoid the discontinuities found in current outputs of the respective cathodes.