EP1576292B1 - Dispositif de pompage sous vide - Google Patents

Dispositif de pompage sous vide Download PDF

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Publication number
EP1576292B1
EP1576292B1 EP03786101A EP03786101A EP1576292B1 EP 1576292 B1 EP1576292 B1 EP 1576292B1 EP 03786101 A EP03786101 A EP 03786101A EP 03786101 A EP03786101 A EP 03786101A EP 1576292 B1 EP1576292 B1 EP 1576292B1
Authority
EP
European Patent Office
Prior art keywords
pumping mechanism
pumping
arrangement
drive shaft
molecular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP03786101A
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German (de)
English (en)
Other versions
EP1576292A2 (fr
Inventor
Nigel Paul Schofield
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Edwards Ltd
Original Assignee
Edwards Ltd
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Filing date
Publication date
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Application filed by Edwards Ltd filed Critical Edwards Ltd
Publication of EP1576292A2 publication Critical patent/EP1576292A2/fr
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Publication of EP1576292B1 publication Critical patent/EP1576292B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/058—Bearings magnetic; electromagnetic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/168—Pumps specially adapted to produce a vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/02—Multi-stage pumps
    • F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
    • F04D19/048—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps comprising magnetic bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D23/00—Other rotary non-positive-displacement pumps
    • F04D23/008—Regenerative pumps

Definitions

  • the present invention relates to a vacuum pumping arrangement comprising a molecular pumping mechanism and a regenerative pumping mechanism.
  • a known vacuum pumping arrangement for evacuating a chamber comprises a molecular pump which may include: molecular drag pumping means; or turbomolecular pumping means; or both molecular drag pumping means and turbomolecular pumping means. If both pumping means are included the turbomolecular pumping means are connected in series with the molecular drag pumping means.
  • the pumping arrangement is capable of evacuating the chamber to very low pressures in the region of 1 x 10 -6 mbar.
  • the compression ratio achieved by the molecular pump is not sufficient to achieve such low pressures whilst at the same time exhausting to atmosphere and therefore a backing pump is provided to reduce pressure at the exhaust of the molecular pump and hence permit very low pressures to be achieved at the inlet thereof.
  • DE 199 13 593 and US 6,446,651 both describe a pump assembly having a high-vacuum pump backed by a backing pump.
  • the high-vacuum pump is a turbomolecular vacuum pump.
  • EP 1 234 982 describes a turbomolecular pump comprising a plurality of sections, namely a first section having bladed rotor discs, a second section with smooth rotor discs, a third section with a toothed rotor disc, and a fourth section of an ejector pump type.
  • the drive shaft of the molecular pump which is disposed at the vacuum side of the vacuum pumping arrangement, is supported by a lubricant free bearing, since lubricant can be the cause of contamination. It is possible to use a magnetic bearing, which is lubricant free, because even though a magnetic bearing's construction allows some radial movement of the drive shaft, operation of the molecular pump is not significantly affected by such radial movement.
  • the drive shaft of a regenerative pump which may be used as a backing pump, is typically supported by a lubricated bearing such as a lubricated rolling bearing because of the high loads and level of precision required with a regenerative pump.
  • a lubricated bearing such as a lubricated rolling bearing
  • the radial clearances between the rotor blades and the stator have to be very tightly controlled, and in some cases, restricted to no more than 80 microns. It has been considered therefore that the use of a regenerative pump in a clean environment is not appropriate because generally it is driven by a drive shaft supported by a lubricated bearing.
  • the present invention provides a vacuum pumping arrangement comprising a drive shaft, a motor for driving said drive shaft, and a molecular pumping mechanism, and characterised by comprising a regenerative pumping mechanism, wherein said drive shaft is arranged for simultaneously driving said molecular pumping mechanism and said regenerative pumping mechanism and said drive shaft is supported by a lubricant free bearing associated with said molecular pumping mechanism.
  • a vacuum pumping arrangement 10 is shown schematically, which comprises a molecular pumping mechanism 12 and a backing pumping mechanism 14.
  • the molecular pumping mechanism comprises turbomolecular pumping means 16 and molecular drag, or friction, pumping means 18.
  • the molecular pumping mechanism may comprise turbomolecular pumping means only or molecular drag pumping means only.
  • the backing pump 14 comprises a regenerative pumping mechanism.
  • a further drag pumping mechanism 20 may be associated with the regenerative pumping mechanism and provided between drag pumping mechanism 18 and regenerative pumping mechanism 14.
  • Drag pumping mechanism 20 comprises three drag pumping stages in series, whereas drag pumping mechanism 18 comprises two drag pumping stages in parallel.
  • Vacuum pumping arrangement 10 comprises a housing, which is formed in three separate parts 22, 24, 26, and which houses the molecular pumping mechanism 12, drag pumping mechanism 20 and regenerative pumping mechanism 14.
  • Parts 22 and 24 may form the inner surfaces of the molecular pumping mechanism 12 and the drag pumping mechanism 20, as shown.
  • Part 26 may form the stator of the regenerative pumping mechanism 14.
  • Part 26 defines a counter-sunk recess 28 which receives a lubricated bearing 30 for supporting a drive shaft 32, the bearing 30 being at a first end portion of the drive shaft associated with regenerative pumping mechanism 14.
  • Bearing 30 may be a rolling bearing such as a ball bearing and may be lubricated, for instance with grease, because it is in a part of the pumping arrangement 10 distal from the inlet of the pumping arrangement.
  • the inlet of the pumping arrangement may be in fluid connection with a semiconductor processing chamber in which a clean environment is required.
  • Drive shaft 32 is driven by motor 34 which as shown is supported by parts 22 and 24 of the housing.
  • the motor may be supported at any convenient position in the vacuum pumping arrangement.
  • Motor 34 is adapted to be able to drive simultaneously the regenerative pumping mechanism 14, and the drag pumping mechanism 20 supported thereby, and also the molecular pumping mechanism 12.
  • a regenerative pumping mechanism requires more power for operation than a molecular pumping mechanism, the regenerative pumping mechanism operating at pressures close to atmosphere where windage and air resistance is relatively high.
  • a molecular pumping mechanism requires relatively less power for operation, and therefore, a motor selected for powering a regenerative pumping mechanism is also generally suitable for powering a molecular pumping mechanism.
  • Means are provided for controlling the rotational speeds of the backing pumping mechanism and the molecular pumping mechanism so that pressure in a chamber connected to the arrangement can be controlled.
  • a suitable control system diagram for controlling speed of the motor 34 is shown in Figure 3 and includes a pressure gauge 35 for measuring pressure in a chamber 33, and a controller 37 connected to the pressure gauge for controlling the pump's rotational speed.
  • Regenerative pumping mechanism 14 comprises a stator comprising a plurality of circumferential pumping channels disposed concentrically about a longitudinal axis A of the drive shaft 32 and a rotor comprising a plurality of arrays of rotor blades extending axially into respective said circumferential pumping channels. More specifically, regenerative pumping mechanism 14 comprises a rotor fixed relative to drive shaft 32. The regenerative pumping mechanism 14 comprises three pumping stages, and for each stage, a circumferential array of rotor blades 38 extends substantially orthogonally from one surface of the rotor body 36.
  • the rotor blades 38 of the three arrays extend axially into respective circumferential pumping channels 40 disposed concentrically in part 26 which constitutes the stator of the regenerative pumping mechanism 14.
  • drive shaft 32 rotates rotor body, 36 which causes the rotor blades 38 to travel along the pumping channels, pumping gas from inlet 42 in sequence along the radially outer pumping channel, radially middle pumping channel and radially inner pumping channel where it is exhausted from pumping mechanism 14 via exhaust 44 at pressures close to or at atmospheric pressure.
  • FIG. 2 An enlarged cross-section of a single stage of the regenerative pumping mechanism is shown in Figure 2 .
  • the radial clearance "C” between rotor blades 38 and stator 26 is closely controlled, and preferably kept to no more than 200 microns or less, and preferably less than 80 microns, during operation.
  • An increase in clearance "C” would lead to significant seepage of gas out of pumping channel 40 and reduce efficiency of regenerative pumping mechanism 14. Therefore, regenerative pumping mechanism 14 is associated with the lubricated rolling bearing 30 which substantially resists radial movement of the drive shaft 32 and hence rotor body 36.
  • bearing 30 may act as a pivot about which some radial movement may take place.
  • the rotor 36 of the regenerative pumping mechanism is connected to the drive shaft 32 so as to be sufficiently close to the lubricated bearing 30 (i.e. the pivot) so that radial movement of the drive shaft translates substantially to axial movement of the rotor blades relative to respective circumferential pumping channels 40.
  • the bearing 30 is substantially axially aligned with the circumferential pumping channels so that any radial movement of the rotor blades 38 does not cause significant seepage.
  • the stator 26 of the regenerative pumping mechanism 14 defines the recess for the bearing 30 and the rotor body 36 is, as it will be appreciated, adjacent the stator 26. Accordingly, the bearing 30, which resists radial movement, prevents significant radial movement of the rotor body 36 and also hence of the rotor blades 38. Therefore, clearance "C" between the rotor blades 38 and stator 26 can be kept within tolerable limits.
  • the drag cylinders 46 are made from carbon fibre reinforced material which is both strong and light. The reduction in mass when using carbon fibre drag cylinders, as compared with the use of aluminium drag cylinders, produces less inertia when the drag pumping mechanism is in operation. Accordingly, the rotational speed of the drag pumping mechanism is easier to control.
  • the drag pumping mechanism 20 shown schematically is a Holweck type drag pumping mechanism in which stator portions 48 define a spiral channel between the inner surface of housing part 24 and the drag cylinders 46. Three drag stages are shown, each of which provides a spiral path for gas flow between the rotor and the stator.
  • the operation and structure of a Holweck drag pumping mechanism is well known. The gas flow follows a tortuous path flowing consecutively through the drag stages in series.
  • the molecular pumping mechanism 12 is driven at a distal end of drive shaft 32 from the regenerative pumping mechanism 14.
  • a back up bearing may be provided to resist extreme radial movement of the drive shaft 32 during, for instance, power failure.
  • the lubricant free bearing is a magnetic bearing 54 provided between rotor body 52 and a cylindrical portion 56 fixed relative to the housing part 22.
  • a passive magnetic bearing is shown in which like poles of a magnet repel each other resisting excessive radial movement of rotor body 52 relative to the central axis A.
  • the drive shaft may move about 0.1 mm.
  • an active magnetic bearing may be adopted.
  • electro magnets are used rather than permanent magnets in passive magnetic bearings.
  • a detection means for detecting radial movement and for controlling the magnetic field to resist the radial movement.
  • Figures 6 to 8 show an active magnetic bearing.
  • a circumferential array of angled rotor blades 58 extend radially outwardly from rotor body 52. At approximately half way along the rotor blades 58 at a radially intermediate portion of the array, a cylindrical support ring 60 is provided, to which is connected drag cylinder 62 of drag pumping mechanism 18.
  • Drag pumping mechanism 18 comprises two drag stages in parallel with a single drag cylinder 62, which may be made from carbon fibre to reduce inertia. Each of the stages is comprised of stator portions 64 forming with the tapered inner walls 66 of the housing 22 a spiral molecular gas flow channel. An outlet 68 is provided to exhaust gas from the drag pumping mechanism 18.
  • inlet 70 of pump arrangement 10 is connected to a chamber, the pressure of which it is desired to reduce.
  • Motor 34 rotates drive shaft 32 which in turn drives rotor body 36 and rotor body 52.
  • Gas in molecular flow conditions is drawn in through inlet 70 to the turbomolecular pumping means 16 which urges molecules into the molecular drag pumping means 18 along both parallel drag pumping stages and through outlet 68.
  • Gas is then drawn through the three stages in series of the drag pumping mechanism 20 and into the regenerative pumping mechanism through inlet 42. Gas is exhausted at atmospheric pressure or thereabouts through exhaust port 44.
  • Regenerative pumping mechanism 14 is required to exhaust gas at approximately atmospheric pressure. Accordingly, the gas resistance to passage of the rotor blades 38 is considerable and therefore the power and torque characteristics of motor 34 must be selected to meet the requirements of the regenerative pumping mechanism 14.
  • the resistance to rotation encountered by the molecular pumping mechanism 12 is relatively little, since the molecular pumping mechanism operates at relatively low pressures.
  • the structure of the drag pumping mechanism 18 with its only moving part being a cylinder rotated about axis A does not suffer significantly from gas resistance to rotation. Therefore, once power and torque characteristics for motor 34 have been selected for regenerative pumping mechanism 14, only a relatively small proportion of extra capacity is needed so that the motor also meets the requirements of molecular pumping mechanism 12.
  • a 200w motor which is typically used for a molecular pumping mechanism, is significantly less powerful than motor 34 which preferably is a 2kw motor.
  • motor 34 which preferably is a 2kw motor.
  • the typical motor is not powerful enough so that pressure change in a chamber can be controlled by controlling the rotational speed of the pump.
  • a powerful motor is selected to drive regenerative pumping mechanism 14, the additional power can also be used to control rotational speed of the molecular pumping mechanism and thereby control pressure.
  • a typical turbomolecular pumping means is evacuated to relatively low pressures before it is started up.
  • a backing pumping mechanism is used for this purpose. Since the backing pumping mechanism and turbomolecular pumping means are associated with the same drive shaft in vacuum pumping arrangement 10, this start up procedure is not possible.
  • the vacuum pumping arrangement forms part of a vacuum pumping system which comprises additional evacuation means to evacuate at least the turbomolecular pumping means 16 prior to start up to a predetermined pressure.
  • the turbomolecular pumping means is evacuated to less than 500 mbar prior to start up. Conveniently, the whole vacuum pumping arrangement is evacuated prior to start up, as shown in Figures 4 and 5 .
  • the evacuation means may be provided by an additional pump, although this is not preferred since an additional pump would increase costs of the system.
  • a pump or pumping means associated with the system such as the pump for the load lock chamber.
  • Figure 4 shows the arrangement of a semiconductor processing system, in which the load lock pump 74 is, in normal use, used to evacuate pressure from load lock chamber 76.
  • a valve 78 is provided between load lock chamber 76 and load lock pump 74.
  • Load lock pump 74 is connected to the exhaust of pumping arrangement 10 via valve 80.
  • a further valve 82 is provided downstream of exhaust 44 of pumping arrangement 10.
  • valve 78 and valve 82 are closed whilst valve 80 is opened.
  • Load lock pump 74 is operated to evacuate gas from arrangement 10 and therefore from turbomolecular pumping means 16.
  • valves 82 and 78 are opened whilst valve 80 is closed.
  • Arrangement 10 is operated to evacuate pressure from vacuum chamber 84.
  • vacuum pumping arrangement 10 can be started up as described with reference to Figure 5 .
  • the additional evacuation means comprises a high pressure nitrogen supply which is connected to an ejector pump 90 via valve 88. Valve 88 is opened so that high pressure nitrogen is ejected to evacuate arrangement 10 and therefore turbomolecular pumping means 16. Nitrogen is a relatively inert gas and does not contaminate the system.
  • the pumping arrangement 10 may be evacuated prior to start up, it is also possible to evacuate the arrangement after start up, since the arrangement can be started but will not reach suitable rotational speeds until evacuation is performed.
  • Figure 6 shows a vacuum pumping arrangement 100 comprising an active magnetic bearing in which a cylindrical pole of the magnetic bearing 54 is mounted to the drive shaft 32 with a like pole being positioned on housing 22.
  • the rotor body 52 of the turbomolecular pumping means 16 of the molecular pumping mechanism is disc-shaped and the overall size of the arrangement 100 is reduced as compared with the first embodiment.
  • a vacuum pumping arrangement 200 is shown in which the turbomolecular pumping means 12 comprises two turbomolecular pumping stages 16.
  • a stator 92 extends radially inwardly from housing part 22 between the two turbo stages 16.
  • FIG 8 a vacuum pumping arrangement 300 is shown in which molecular drag pumping mechanism 20 has been omitted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Non-Positive Displacement Air Blowers (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Claims (13)

  1. Système (10) de pompe à vide comprenant un arbre d'entraînement (32), un moteur (34) pour entraîner ledit arbre d'entraînement (32), et un mécanisme (12) de pompage moléculaire, et caractérisé en ce qu' il comprend un mécanisme (14) de pompage régénératif, dans lequel ledit arbre d'entraînement (32) est agencé de manière à entraîner simultanément ledit mécanisme (12) de pompage moléculaire et ledit mécanisme (14) de pompage régénératif, et ledit arbre d'entraînement (32) est supporté par un palier (54) sans lubrifiant associé audit mécanisme (12) de pompage moléculaire.
  2. Système selon la revendication 1, dans lequel ledit palier (54) sans lubrifiant est un palier magnétique.
  3. Système selon la revendication 1 ou 2, dans lequel ledit palier (54) sans lubrifiant et le mécanisme (12) de pompage moléculaire sont sensiblement alignés axialement.
  4. Système selon l'une quelconque des revendications précédentes, dans lequel ledit arbre d'entraînement (32) est supporté en plus par un palier lubrifié (30) associé audit mécanisme (14) de pompage régénératif.
  5. Système selon la revendication 4, dans lequel ledit palier lubrifié (30) est un palier à roulement.
  6. Système selon la revendication 4 ou la revendication 5, dans lequel ledit palier lubrifié (30) et le mécanisme régénératif (14) sont sensiblement alignés axialement.
  7. Système selon l'une quelconque des revendications 4 à 6, dans lequel ledit mécanisme (14) de pompage régénératif comprend un stator comprenant une pluralité de canaux de pompage circonférentiels (40) disposés autour d'un axe longitudinal de l'arbre d'entraînement (32) et un rotor comprenant une pluralité d'ensembles d'ailettes (38) de rotor s'étendant axialement dans lesdits canaux de pompage circonférentiels (40) respectifs.
  8. Système selon la revendication 7, dans lequel ledit rotor dudit mécanisme (14) de pompage régénératif est relié audit arbre d'entraînement (32) de manière à être suffisamment proche dudit palier lubrifié (30) afin que le mouvement radial dudit arbre d'entraînement (32) sur ledit palier (54) sans lubrifiant soit essentiellement translaté au mouvement axial desdites ailettes (38) de rotor par rapport auxdits canaux de pompage circonférentiels (40) respectifs.
  9. Système selon la revendication 7 ou 8, dans lequel ledit palier lubrifié (30) et lesdits canaux de pompage circonférentiels (40) sont sensiblement alignés axialement.
  10. Système selon l'une quelconque des revendications 7 à 9, dans lequel ledit palier lubrifié (30) est logé dans le stator du mécanisme (14) de pompage régénératif.
  11. Système selon l'une quelconque des revendications précédentes, dans lequel ledit mécanisme (12) de pompage moléculaire comprend des moyens de pompage moléculaire mécanique (18).
  12. Système selon l'une quelconque des revendications précédentes, dans lequel ledit mécanisme (12) de pompage moléculaire comprend des moyens de pompage turbomoléculaire (16).
  13. Système selon l'une quelconque des revendications précédentes, comprenant un carter qui abrite le mécanisme (12) de pompage moléculaire, le mécanisme (14) de pompage régénératif, l'arbre d'entraînement (32) et le moteur (34).
EP03786101A 2002-12-17 2003-12-09 Dispositif de pompage sous vide Revoked EP1576292B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0229356 2002-12-17
GBGB0229356.1A GB0229356D0 (en) 2002-12-17 2002-12-17 Vacuum pumping arrangement
PCT/GB2003/005375 WO2004055376A2 (fr) 2002-12-17 2003-12-09 Dispositif de pompage sous vide

Publications (2)

Publication Number Publication Date
EP1576292A2 EP1576292A2 (fr) 2005-09-21
EP1576292B1 true EP1576292B1 (fr) 2008-03-05

Family

ID=9949817

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03786101A Revoked EP1576292B1 (fr) 2002-12-17 2003-12-09 Dispositif de pompage sous vide

Country Status (9)

Country Link
US (1) US20060140794A1 (fr)
EP (1) EP1576292B1 (fr)
JP (1) JP2006509952A (fr)
AT (1) ATE388328T1 (fr)
AU (1) AU2003295101A1 (fr)
DE (1) DE60319585T2 (fr)
GB (1) GB0229356D0 (fr)
TW (1) TW200417690A (fr)
WO (1) WO2004055376A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009021620B4 (de) 2009-05-16 2021-07-29 Pfeiffer Vacuum Gmbh Vakuumpumpe
DE102010019940B4 (de) 2010-05-08 2021-09-23 Pfeiffer Vacuum Gmbh Vakuumpumpstufe

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0409139D0 (en) * 2003-09-30 2004-05-26 Boc Group Plc Vacuum pump
DE102008024764A1 (de) * 2008-05-23 2009-11-26 Oerlikon Leybold Vacuum Gmbh Mehrstufige Vakuumpumpe
DE102008035891A1 (de) * 2008-07-31 2010-02-04 Oerlikon Leybold Vacuum Gmbh Vakuumpumpe
DE102009021642B4 (de) 2009-05-16 2021-07-22 Pfeiffer Vacuum Gmbh Vakuumpumpe
DE102009055888A1 (de) * 2009-11-26 2011-06-01 Oerlikon Leybold Vacuum Gmbh Vakuumpumpe
WO2012043027A1 (fr) * 2010-09-28 2012-04-05 エドワーズ株式会社 Pompe d'évacuation
DE102011112691A1 (de) * 2011-09-05 2013-03-07 Pfeiffer Vacuum Gmbh Vakuumpumpe
DE102012003680A1 (de) 2012-02-23 2013-08-29 Pfeiffer Vacuum Gmbh Vakuumpumpe
DE202015007985U1 (de) 2015-11-19 2017-02-21 Leybold Gmbh Vorrichtung zum Speichern kinetischer Energie
US11519419B2 (en) * 2020-04-15 2022-12-06 Kin-Chung Ray Chiu Non-sealed vacuum pump with supersonically rotatable bladeless gas impingement surface

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2349033C3 (de) * 1973-09-29 1984-08-30 Leybold-Heraeus Gmbh, 5000 Koeln Turbomolekularpumpe
JPH0646036B2 (ja) * 1982-11-19 1994-06-15 セイコー電子工業株式会社 軸流分子ポンプ
US4767265A (en) * 1983-10-07 1988-08-30 Sargent-Welch Scientific Co. Turbomolecular pump with improved bearing assembly
DE4427154A1 (de) * 1994-08-01 1996-02-08 Balzers Pfeiffer Gmbh Reibungspumpe mit Magnetlagerung
GB9609281D0 (en) * 1996-05-03 1996-07-10 Boc Group Plc Improved vacuum pumps
GB9810872D0 (en) * 1998-05-20 1998-07-22 Boc Group Plc Improved vacuum pump
FR2783883B1 (fr) * 1998-09-10 2000-11-10 Cit Alcatel Procede et dispositif pour eviter les depots dans une pompe turbomoleculaire a palier magnetique ou gazeux
DE19913593B4 (de) * 1999-03-24 2004-09-23 Ilmvac Gmbh Gesteuerter Pumpstand
DE19915983A1 (de) * 1999-04-09 2000-10-12 Pfeiffer Vacuum Gmbh Vakuumpumpe mit Gaslagerung
DE19929519A1 (de) * 1999-06-28 2001-01-04 Pfeiffer Vacuum Gmbh Verfahren zum Betrieb einer Mehrkammer-Vakuumanlage
DE10043783A1 (de) * 2000-09-06 2002-03-14 Leybold Vakuum Gmbh Verfahren und Vorrichtung zur Regelung des Vakuums in einer Kammer
DE60101368T2 (de) * 2001-02-22 2004-10-14 Varian S.P.A., Leini Vakuumpumpe
GB0114417D0 (en) * 2001-06-13 2001-08-08 Boc Group Plc Lubricating systems for regenerative vacuum pumps
FR2859250B1 (fr) * 2003-08-29 2005-11-11 Cit Alcatel Pompe a vide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009021620B4 (de) 2009-05-16 2021-07-29 Pfeiffer Vacuum Gmbh Vakuumpumpe
DE102010019940B4 (de) 2010-05-08 2021-09-23 Pfeiffer Vacuum Gmbh Vakuumpumpstufe

Also Published As

Publication number Publication date
EP1576292A2 (fr) 2005-09-21
US20060140794A1 (en) 2006-06-29
WO2004055376A2 (fr) 2004-07-01
TW200417690A (en) 2004-09-16
DE60319585D1 (de) 2008-04-17
DE60319585T2 (de) 2009-03-26
JP2006509952A (ja) 2006-03-23
ATE388328T1 (de) 2008-03-15
AU2003295101A1 (en) 2004-07-09
GB0229356D0 (en) 2003-01-22
WO2004055376A3 (fr) 2004-08-05

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