摘要:
A turbo-molecular pump includes a casing having an intake port, a stator fixedly mounted in the casing, and a rotor supported in the casing for rotation relatively to the stator. The stator and the rotor make up a turbine blade pumping section and a groove pumping section for evacuating gas. A scattering prevention member is provided for preventing fragments of the rotor from being scattered through the intake port.
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:
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:
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:
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:
A processing apparatus is used for processing a workpiece such as a semiconductor wafer. The processing apparatus comprises a cover for covering a portion of a surface, to be processed, of a workpiece, a process chamber formed by the cover and the surface, to be processed, of the workpiece, and a sealing portion provided between the cover and the surface of the workpiece for sealing the process chamber.
摘要:
An electro-optical inspection apparatus prevents adhesion of dust or particles to a sample surface, wherein a stage on which a sample is placed is disposed inside a vacuum chamber that can be evacuated, and a dust collecting electrode is disposed to surround a periphery of the sample. The dust collecting electrode is applied with a voltage having the same polarity as a voltage applied to the sample and an absolute value that is the same or larger than an absolute value of the voltage. Because dust or particles adhere to the dust collecting electrode, adhesion of the dust or particles to the sample surface can be reduced. Instead of using the dust collecting electrode, it is possible to form a recess on a wall of the vacuum chamber, or to dispose on the wall a metal plate having a mesh structure to which a predetermined voltage is applied.
摘要:
An extreme ultraviolet light source apparatus comprises a target supply unit supplying a target into a vacuum chamber, a laser oscillator outputting a laser light into the vacuum chamber, a collector mirror outputting an extreme ultraviolet light outside by reflecting the extreme ultraviolet light emitted from the target being ionized as a plasma by irradiation with the laser light at a plasma luminescence point in the vacuum chamber, and an ion debris removal unit at least a part of which is located in an obscuration region including the plasma luminescence point.
摘要:
An extreme ultraviolet light source apparatus comprises a target supply unit supplying a target into a vacuum chamber, a laser oscillator outputting a laser light into the vacuum chamber, a collector mirror outputting an extreme ultraviolet light outside by reflecting the extreme ultraviolet light emitted from the target being ionized as a plasma by irradiation with the laser light at a plasma luminescence point in the vacuum chamber, and an ion debris removal unit at least a part of which is located in an obscuration region including the plasma luminescence point.
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.