WO2008046551A1 - Vorrichtung und verfahren zur erzeugung von mikrowellenplasmen hoher leistung - Google Patents
Vorrichtung und verfahren zur erzeugung von mikrowellenplasmen hoher leistung Download PDFInfo
- Publication number
- WO2008046551A1 WO2008046551A1 PCT/EP2007/008838 EP2007008838W WO2008046551A1 WO 2008046551 A1 WO2008046551 A1 WO 2008046551A1 EP 2007008838 W EP2007008838 W EP 2007008838W WO 2008046551 A1 WO2008046551 A1 WO 2008046551A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dielectric
- microwave
- tube
- dielectric tube
- fluid
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32458—Vessel
- H01J37/32522—Temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32192—Microwave generated discharge
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32192—Microwave generated discharge
- H01J37/32211—Means for coupling power to the plasma
- H01J37/3222—Antennas
Definitions
- the invention relates to a method for producing high plasma density microwave plasma in a device having at least one microwave feed surrounded by at least one dielectric tube.
- Devices for generating microwave plasmas are used in the plasma treatment of workpieces and gases.
- the plasma treatment is used for.
- the workpiece or gas to be treated is brought into contact with the plasma or the microwave radiation.
- the geometry of the workpieces to be treated ranges from flat substrates, fibers and webs to moldings of any shape.
- any known gas can be used.
- the most important process gases are noble gases, fluorine- and chlorine-containing gases, hydrocarbons, furans, dioxins, hydrogen sulfide, oxygen, hydrogen, nitrogen, tetrafluoromethane, sulfur hexafluoride, air, water and their mixtures.
- the process gas consists of exhaust gases of all kinds, in particular carbon monoxide, hydrocarbons, nitrogen oxides, Aldehydes and sulfur oxides.
- these gases can readily be used as process gases for other applications.
- the above-mentioned documents have in common that they describe a microwave antenna inside a dielectric tube. If microwaves are generated in the interior of such a tube, surface waves form along the outside thereof. These surface waves generate a linearly stretched plasma in a process gas which is under low pressure. Typical lower pressures are 0.1 mbar - 10 mbar.
- the volume inside the dielectric tube is typically at ambient pressure (generally normal pressure, about 1013 mbar).
- a cooling gas flow through the tube is used to cool the dielectric tube.
- microwaves for the supply of microwaves, inter alia, waveguide and coaxial, as coupling points in the wall of the plasma chamber, inter alia, antennas and slots are used.
- Such feed lines for microwaves and coupling points are described, for example, in DE 423 59 14 and WO 98/59359 A1.
- the microwave frequencies used to generate the plasma are preferably in the range from 800 MHz to 2.5 GHz, more preferably in the ranges from 800 MHz to 950 MHz and 2.0 - 2.5 GHz, however, the microwave frequency can be in the entire range of 10 MHz to several 100 GHz.
- DE 198 480 22 A1 and DE 195 032 05 C1 describe devices for generating plasma in a vacuum chamber by means of electromagnetic alternating fields, with a conductor which projects inside a tube of insulating material in the vacuum chamber, wherein the insulating tube at both ends by walls the vacuum chamber is held and sealed against the walls on its outer surface.
- the ends of the conductor are connected to a generator for generating the electromagnetic alternating fields.
- homogeneous microwave plasmas With a device for the production of homogeneous microwave plasmas according to WO 98/59359 A1, particularly homogeneous plasmas can be produced over long distances, even at higher process pressures, due to the uniform coupling of the microwaves.
- the possible uses of the abovementioned plasma sources are limited by a high energy output of the plasma on the dielectric tube. This release of energy can lead to excessive heating of the tube and ultimately to its destruction. Therefore, these sources are typically operated with microwave power of about 1 - 2 kW at a correspondingly low pressure (about 0.1 - 0.5 mbar). Although the process pressures can be 1 mbar - 100 mbar, but only under certain conditions and correspondingly lower power, so as not to destroy the pipe. With the above-mentioned devices, typical plasma lengths of 0.5 to 1.5 m can be achieved. Although larger lengths can be achieved with plasmas made from almost 100% argon, such plasmas are technically less relevant.
- the object of the present invention is to prevent or reduce the above-mentioned disadvantages of excessive heating of the dielectric tube and thus to enable an increase in the power of the plasma sources.
- a dielectric fluid is passed through the space between the microwave feed and the dielectric tube.
- the dielectric fluid which has a small dielectric electric loss factor tan ⁇ in the range 10 "2 to 10 ⁇ 7 , flows through this space between microwave feed and dielectric tube.
- the method advantageously enables the cooling of the dielectric tube by means of the passage of the fluid through the above-described tube arrangement.
- the device and the method will be described.
- Suitable microwave feeds are known to the person skilled in the art.
- a microwave feed consists of a structure that can radiate microwaves into the room. Structures that radiate microwaves are known to the person skilled in the art and can be implemented by all known microwave antennas and resonators with coupling points for coupling the microwave radiation into a room. Cavity resonators, rod antennas, slot antennas, helix antennas and omnidirectional antennas are preferred for the device described. Particularly preferred are coaxial resonators.
- the microwave feed is connected via microwave feed lines (waveguide or coaxial conductor) to a microwave generator (eg klystron or magnetron).
- a microwave generator eg klystron or magnetron
- circulators e.g klystron or magnetron
- isolators tuning elements
- tuning elements for example three-pin tuner or E / H tuner
- mode converters for example rectangular to coaxial conductors
- the dielectric tubes are preferably elongate. This means here that the ratio of pipe diameter: pipe length is between 1: 1 and 1: 1000, and preferably 1:10 to 1: 100.
- the two tubes can be the same length or have a different length.
- the tubes are preferably straight, but may also have a curved shape or corners along their longitudinal axis.
- the cross-sectional area of the tubes is preferably circular, but generally any surface shapes are possible. Examples of other surface shapes are ellipses and polygons.
- Elongated shape of the tubes requires an elongated plasma.
- Elongated plasmas have the advantage that, by moving the plasma apparatus relative to a flat workpiece, large areas can be treated in a short time.
- the dielectric tubes should have a low dielectric loss factor tan ⁇ for the microwave wavelength used at the given microwave frequency.
- Low dielectric loss factors tan ⁇ ' are in the range 10 ' 2 to 10 "7 .
- Suitable dielectric materials for the dielectric tubes are metal oxides, semi-metal oxides, ceramics, plastics, and composites of these materials. Particular preference is given to dielectric tubes made of quartz glass or aluminum oxide with dielectric loss factors tan ⁇ in the range 10 -3 . to 10 ⁇ 4 . In this case, the dielectric tubes may consist of the same material or different materials. According to a particular embodiment, the dielectric tubes are closed at the end faces with walls. A gas- or vacuum-tight connection between the pipes and the walls is advantageous. Connections between two workpieces are known to the person skilled in the art and can be, for example, adhesive, welding, clamping or screw connections.
- the tightness of the compound can range from gas-tight to vacuum-tight, being vacuum tight, depending on the working environment, tightness in a rough vacuum (300 - 1 hPa), fine vacuum (1 - 10 "3 hPa), high vacuum (10 '3 - 10 " 7 hPa) or Ultra-high vacuum (10 ⁇ 7 - 10 "12 hPa)
- vacuum-tight means here a tightness in coarse or fine vacuum.
- the walls may have passages through which a fluid can be passed.
- the size and shape of the passages is arbitrary.
- each wall can contain at least one passage. In a preferred embodiment, there are no passages in the area covered by the end face of the inner dielectric tube.
- the fluid can be conducted into the space between the outer dielectric tube and the inner dielectric tube and discharged again.
- Another possibility is the supply or discharge of the dielectric liquid via passages in the microwave feed on the one, and at least one of the passages in the walls on the other side.
- the pressure of the fluid may be greater than, less than or equal to the atmospheric pressure.
- the rate of flow and flow (laminar or turbulent) of the dielectric fluid through the dielectric tube should be selected so that the fluid has good contact with the edge of the dielectric tube and, in addition, liquid dielectric does not vaporize the dielectric fluid ,
- the control of the flow rate and the fürström s means of the pressure and the shape and size of the passages is known in the art.
- a dielectric fluid is preferably used. Since liquids generally have a much higher specific heat coefficient than gases, the cooling of the dielectric tube with a dielectric fluid is much more effective than with gas cooling, as described in DE 195 032 05 C1. However, a cooling of the dielectric tube by a liquid is not easy to realize, since the energy input of the microwaves to the liquid heats them. Each additional heating of the dielectric liquid reduces the cooling effect on the dielectric tube. This reduction in the cooling capacity can also lead to a negative cooling performance at high microwave absorption of the liquid, which corresponds to an additional heating of the dielectric tube by the cooling liquid.
- the dielectric liquid In order to minimize heating of the dielectric liquid by the microwaves, the dielectric liquid must have a low dielectric loss factor tan ⁇ in the range at the wavelength of the microwaves 10 "2 to 10 " 7 . As a result, a microwave power input is avoided in the cooling medium or reduced to a tolerable level.
- Such a dielectric fluid is, for example, an insulating oil having a low dielectric loss factor.
- Insulating oils are, for example, mineral oils, olefins (for example polyalphaolefin) or silicone oils (for example Coolanol® or dimethylpolysiloxanes).
- Preferred as a dielectric liquid is hexadimethylsiloxane.
- Another embodiment of the device is a double tube arrangement.
- a dielectric inner tube between the microwave feed and the dielectric tube is inserted.
- the dielectric fluid can be guided between the two tubes in this embodiment (see Fig.2).
- a gas cooling according to DE 195 032 05 in which the cooling gas has contact with the microwave feed, the contact between the fluid and the microwave feed is avoided here by the double tube arrangement, and thus precludes the possibility that the fluid with the microwave feed can react. Furthermore, maintenance of the microwave feed is considerably simplified by this separation of fluid and microwave feed.
- a metallic Uxnmante- ment can be attached to the outer dielectric tube, which covers this tube partially.
- This metallic sheath acts as a microwave shield and can be used e.g. consist of a metal tube, a bent metal sheet, a metal foil or even of a metallic layer and plugged, galvanized or applied in any other way.
- Such metallic microwave shields can arbitrarily limit the angular range in which the generation of the plasma takes place (for example to 90 °, 180 ° or 270 °) and thus reduce the power requirement accordingly.
- the device is operated inside a room, a plasma chamber.
- this plasma chamber can have different shapes and openings and fulfill various functions.
- the plasma chamber can contain the workpiece to be machined and the process gas (direct plasma process) or process gases and openings for the plasma exit have (remote plasma process, exhaust gas purification).
- Figure 1 shows sectional drawings of the device described above.
- FIG. 2 shows sectional drawings of the device described above with a double-tube arrangement.
- Figures 3 A and 3 B show two embodiments with metallic sheath.
- Figure 4 shows a cross-sectional view of the device described above installed in a plasma chamber.
- Figures 5 A and 5 B show a possible embodiment for the treatment of large-scale workpieces.
- FIG. 1 shows the transverse and longitudinal section of a device for the production of microwave plasmas with a running as a coaxial resonator microwave feed.
- the microwave feed contains an inner conductor (1), an outer conductor (2) and coupling points (4).
- the microwave feed is surrounded by a dielectric tube (3), which separates the microwave supplying area from the plasma chamber (not shown) and on the outside of which the plasma is formed.
- the dielectric tube (3) is connected to the walls (5, 6) in a gas-tight or vacuum-tight manner.
- a dielectric fluid may be added or removed via the openings (8) and (9) in the walls. Another way of supplying or discharging the dielectric fluid is on the way (7) through the coaxial generator.
- FIG. 2 shows, in front and side view, a further embodiment of the device with a microwave feed designed as a coaxial resonator, as described in FIG. 1, consisting of the inner conductor (1), the outer conductor (2) and the coupling points (4).
- the microwave feed is surrounded by a dielectric tube (3) which separates the microwave supplying area from the plasma chamber (not shown) and on the outside of which the plasma is formed.
- the dielectric tube (3) is connected to the walls (5, 6) in a gas-tight or vacuum-tight manner.
- a dielectric inner tube (10) is inserted, which is also connected to the walls (5, 6) gas-tight or vacuum-tight.
- the dielectric fluid via the openings (8) and (9) is supplied or removed.
- FIGS. 3 A and 3 B show cross sections of the embodiments illustrated in FIGS. 1 and 2, in which the dielectric tube (3) is surrounded by a metallic sheathing (11). Shown here is the case in which the metallic Uiranantelung the angular range in which the generation of the plasma takes place limited to 180 °.
- Figure 4 shows a longitudinal section of a device (20), as described by Figure 1, when installed in a plasma chamber (21).
- the cooling liquid (22) flows in this example through passages in the two end faces.
- the plasma is formed during operation.
- FIGS. 5 A and 5 B show, in a perspective illustration and in a cross section, an embodiment (20) in which the largest part of the outer surface of the outer dielectric tube is enclosed by a metal sleeve (11) and a plasma (31) which is located in the Drawing indicated by transparent arrows, can arise only in a narrow range.
- a workpiece (30) which moves relative to the device can be treated in this area with plasma over a large area.
- All embodiments are powered by a microwave supply, not shown in the drawings, consisting of a microwave generator and possibly additional elements. These elements may include, for example, circulators, isolators, tuning elements (eg three-pin tuner or E / H tuner) as well as mode converters (eg, rectangular to coaxial).
- the fields of application of the apparatus and the method described above are manifold.
- the plasma treatment is used for.
- the workpiece or gas to be treated is brought into contact with the plasma or the microwave radiation.
- the geometry of the workpieces to be treated ranges from flat substrates, fibers and webs to moldings of any shape.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/311,838 US20100215541A1 (en) | 2006-10-16 | 2007-10-11 | Device and method for producing high power microwave plasma |
EP07818909A EP2080214A1 (de) | 2006-10-16 | 2007-10-11 | Vorrichtung und verfahren zur erzeugung von mikrowellenplasmen hoher leistung |
CA002666117A CA2666117A1 (en) | 2006-10-16 | 2007-10-11 | Device and method for producing high power microwave plasma |
AU2007312618A AU2007312618A1 (en) | 2006-10-16 | 2007-10-11 | Device and method for producing high power microwave plasma |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006048815.6 | 2006-10-16 | ||
DE102006048815.6A DE102006048815B4 (de) | 2006-10-16 | 2006-10-16 | Vorrichtung und Verfahren zur Erzeugung von Mikrowellenplasmen hoher Leistung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008046551A1 true WO2008046551A1 (de) | 2008-04-24 |
Family
ID=38887980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2007/008838 WO2008046551A1 (de) | 2006-10-16 | 2007-10-11 | Vorrichtung und verfahren zur erzeugung von mikrowellenplasmen hoher leistung |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100215541A1 (de) |
EP (1) | EP2080214A1 (de) |
AU (1) | AU2007312618A1 (de) |
CA (1) | CA2666117A1 (de) |
DE (1) | DE102006048815B4 (de) |
WO (1) | WO2008046551A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104094676A (zh) * | 2011-06-21 | 2014-10-08 | 应用材料公司 | 等离子体腔室的传输线rf施加器 |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008018902A1 (de) * | 2008-04-14 | 2009-10-15 | Iplas Innovative Plasma Systems Gmbh | Vorrichtung und Verfahren zur inneren Oberflächenbehandlung von Hohlkörpern |
DE202008008731U1 (de) | 2008-07-02 | 2009-11-19 | Melitta Haushaltsprodukte Gmbh & Co. Kg | Anordnung zur Herstellung von Plasma |
DE202008008729U1 (de) * | 2008-07-02 | 2009-11-19 | Melitta Haushaltsprodukte Gmbh & Co. Kg | Vorrichtung zur Reinigung von Gegenständen |
EP2170022A1 (de) * | 2008-09-25 | 2010-03-31 | Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. | Plasmaapplikator und entsprechendes Verfahren |
TWI544107B (zh) * | 2010-04-30 | 2016-08-01 | 應用材料股份有限公司 | 用於處理基板的設備及方法 |
US9048518B2 (en) * | 2011-06-21 | 2015-06-02 | Applied Materials, Inc. | Transmission line RF applicator for plasma chamber |
JP6473332B2 (ja) * | 2012-01-27 | 2019-02-20 | アプライド マテリアルズ インコーポレイテッドApplied Materials,Incorporated | セグメント化されたアンテナアセンブリおよびプラズマ発生装置 |
DE102012103425A1 (de) * | 2012-04-19 | 2013-10-24 | Roth & Rau Ag | Mikrowellenplasmaerzeugungsvorrichtung und Verfahren zu deren Betrieb |
JP5648660B2 (ja) * | 2012-09-10 | 2015-01-07 | 株式会社デンソー | アルミニウムの陽極酸化方法 |
WO2018217914A1 (en) * | 2017-05-23 | 2018-11-29 | Starfire Industries, Llc | Atmospheric cold plasma jet coating and surface treatment |
FR3079773B1 (fr) * | 2018-04-06 | 2022-03-18 | Addup | Dispositif de chauffage pour appareil de fabrication additive |
JP2022512764A (ja) * | 2018-10-18 | 2022-02-07 | アプライド マテリアルズ インコーポレイテッド | 放射デバイス、基板上に材料を堆積させるための堆積装置、及び基板上に材料を堆積させるための方法 |
JP7462486B2 (ja) * | 2020-06-23 | 2024-04-05 | 東京エレクトロン株式会社 | 高周波給電部材及びプラズマ処理装置 |
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US4698822A (en) * | 1985-03-28 | 1987-10-06 | Centre National De La Recherche Scientifique (C.N.R.S.) | Apparatus for exciting a plasma in a column of gas by means of microwaves, in particular for providing an ion laser |
US5008593A (en) * | 1990-07-13 | 1991-04-16 | The United States Of America As Represented By The Secretary Of The Air Force | Coaxial liquid cooling of high power microwave excited plasma UV lamps |
DE19503205C1 (de) * | 1995-02-02 | 1996-07-11 | Muegge Electronic Gmbh | Vorrichtung zur Erzeugung von Plasma |
DE19812558A1 (de) * | 1998-03-21 | 1999-09-30 | Roth & Rau Oberflaechentechnik | Vorrichtung zur Erzeugung linear ausgedehnter ECR-Plasmen |
Family Cites Families (10)
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JPS56136646A (en) * | 1980-03-26 | 1981-10-26 | Toshiba Corp | Treating apparatus for surface of microwave plasma |
DE3617779A1 (de) * | 1986-05-27 | 1987-12-03 | Max Planck Gesellschaft | Fluiddichte kopplungsvorrichtung fuer mikrowellenstrahlung |
DE4136297A1 (de) * | 1991-11-04 | 1993-05-06 | Plasma Electronic Gmbh, 7024 Filderstadt, De | Vorrichtung zur lokalen erzeugung eines plasmas in einer behandlungskammer mittels mikrowellenanregung |
DE4235914A1 (de) * | 1992-10-23 | 1994-04-28 | Juergen Prof Dr Engemann | Vorrichtung zur Erzeugung von Mikrowellenplasmen |
US5597624A (en) * | 1995-04-24 | 1997-01-28 | Ceram Optic Industries, Inc. | Method and apparatus for coating dielectrics |
DE29623199U1 (de) * | 1996-03-08 | 1998-04-02 | Spitzl, Ralf, Dr., 53639 Königswinter | Vorrichtung zur Erzeugung von leistungsfähigen Mikrowellenplasmen |
DE19722272A1 (de) * | 1997-05-28 | 1998-12-03 | Leybold Systems Gmbh | Vorrichtung zur Erzeugung von Plasma |
DE19726663A1 (de) * | 1997-06-23 | 1999-01-28 | Sung Spitzl Hildegard Dr Ing | Vorrichtung zur Erzeugung von homogenen Mikrowellenplasmen |
DE19848022A1 (de) * | 1998-10-17 | 2000-04-20 | Leybold Systems Gmbh | Vorrichtung zur Erzeugung von Plasma |
FR2787677B1 (fr) * | 1998-12-22 | 2001-01-19 | Air Liquide | Element de canalisation pour dispositif de traitement de gaz et dispositif incorporant un tel element de canalisation |
-
2006
- 2006-10-16 DE DE102006048815.6A patent/DE102006048815B4/de not_active Expired - Fee Related
-
2007
- 2007-10-11 AU AU2007312618A patent/AU2007312618A1/en not_active Abandoned
- 2007-10-11 CA CA002666117A patent/CA2666117A1/en not_active Abandoned
- 2007-10-11 US US12/311,838 patent/US20100215541A1/en not_active Abandoned
- 2007-10-11 EP EP07818909A patent/EP2080214A1/de not_active Withdrawn
- 2007-10-11 WO PCT/EP2007/008838 patent/WO2008046551A1/de active Application Filing
Patent Citations (4)
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US4698822A (en) * | 1985-03-28 | 1987-10-06 | Centre National De La Recherche Scientifique (C.N.R.S.) | Apparatus for exciting a plasma in a column of gas by means of microwaves, in particular for providing an ion laser |
US5008593A (en) * | 1990-07-13 | 1991-04-16 | The United States Of America As Represented By The Secretary Of The Air Force | Coaxial liquid cooling of high power microwave excited plasma UV lamps |
DE19503205C1 (de) * | 1995-02-02 | 1996-07-11 | Muegge Electronic Gmbh | Vorrichtung zur Erzeugung von Plasma |
DE19812558A1 (de) * | 1998-03-21 | 1999-09-30 | Roth & Rau Oberflaechentechnik | Vorrichtung zur Erzeugung linear ausgedehnter ECR-Plasmen |
Non-Patent Citations (1)
Title |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104094676A (zh) * | 2011-06-21 | 2014-10-08 | 应用材料公司 | 等离子体腔室的传输线rf施加器 |
CN108010828A (zh) * | 2011-06-21 | 2018-05-08 | 应用材料公司 | 等离子体腔室的传输线rf施加器 |
Also Published As
Publication number | Publication date |
---|---|
DE102006048815B4 (de) | 2016-03-17 |
AU2007312618A1 (en) | 2008-04-24 |
US20100215541A1 (en) | 2010-08-26 |
CA2666117A1 (en) | 2008-04-24 |
EP2080214A1 (de) | 2009-07-22 |
DE102006048815A1 (de) | 2008-04-17 |
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