EP4496909A1 - Shuttersystem zum spaltfreien abschirmen einer beschichtungsquelle und zugehöriges verfahren - Google Patents
Shuttersystem zum spaltfreien abschirmen einer beschichtungsquelle und zugehöriges verfahrenInfo
- Publication number
- EP4496909A1 EP4496909A1 EP23707883.7A EP23707883A EP4496909A1 EP 4496909 A1 EP4496909 A1 EP 4496909A1 EP 23707883 A EP23707883 A EP 23707883A EP 4496909 A1 EP4496909 A1 EP 4496909A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shutter
- coating source
- coating
- source
- relative movement
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/56—Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks
- C23C14/564—Means for minimising impurities in the coating chamber such as dust, moisture, residual gases
-
- 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
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3411—Constructional aspects of the reactor
- H01J37/3447—Collimators, shutters, apertures
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/0021—Reactive sputtering or evaporation
- C23C14/0036—Reactive sputtering
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
- C23C14/28—Vacuum evaporation by wave energy or particle radiation
- C23C14/30—Vacuum evaporation by wave energy or particle radiation by electron bombardment
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/3407—Cathode assembly for sputtering apparatus, e.g. Target
-
- 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
- H01J37/02—Details
- H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement or ion-optical arrangement
- H01J37/045—Beam blanking or chopping, i.e. arrangements for momentarily interrupting exposure to the discharge
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/33—Processing objects by plasma generation characterised by the type of processing
- H01J2237/332—Coating
Definitions
- the invention relates to a shutter system consisting of a shutter for shielding a coating source in a vacuum system, the shutter being designed to be slidable in front of the coating source.
- the invention also relates to a method which is carried out using the shutter system according to the invention.
- Sputtering is a coating technique from the group of PVD processes (physical vapor deposition).
- Sputtering also known as cathode sputtering, is a physical process in which atoms are released from a solid, the so-called target, by bombarding them with high-energy (noble gas) ions and pass into the gas phase.
- high-energy (noble gas) ions ions are used.
- different sputtering technologies are used.
- sputtering is used to atomize a material, which is then deposited on a substrate and forms a solid layer.
- shutter systems are used to control the flow of material onto the substrates to be coated and to protect the target from foreign coating.
- Sputtering takes place in a coating system Vacuum conditions take place.
- a voltage is applied between two electrodes and a working gas is admitted into the gas space.
- a plasma forms in the gas space.
- the target usually forms the negative electrode and a process chamber or the substrate to be coated usually forms the positively charged electrode.
- an additional magnetic field is arranged behind the cathode plate.
- argon inert working gas
- the gases react with the sputtered layer atoms on the target in the vacuum chamber or on the substrate and form new materials.
- ion beam sputtering a beam of noble gas ions (argon, krypton, xenon) is directed from an ion source onto the target - atomization occurs due to the impinging ion beam.
- the coating system is switched on, i.e. H . the voltage is applied to the electrodes and the plasma is ignited and the desired operating power is set and retracted for a stable process. Only then is the shutter opened to begin coating the substrates.
- the coating source is previously shielded by a shutter. To ensure ignition of the plasma, there must be a gap of a few millimeters between the coating source and the shutter.
- a sheet of metal is swiveled from the side in front of the coating source as a shutter, so that no material from the coating source inadvertently gets onto the substrates to be coated. An undesirable flow of material, so-called cross-contamination, onto the substrates and the environment from the coating source is most effectively prevented if the distance between the sheet and the coating source is as small as possible and the coating source is optimally shielded from the substrates.
- the shutter plates used have been pushed or pivoted in front of the coating source at a distance of approximately 1 to 4 mm.
- this distance cannot ensure complete, closed shielding of the coating source.
- the distance is necessary for sputtering in a coating source. Smaller ones, i.e. H . Smaller distances cannot be implemented in practice, as these usually lead to friction between the shutter plate and the coating source. These friction effects cause many undesirable particles, which can lead to additional contamination of the coated substrates. This usually leads to massive losses in the quality of the layer, such as: B. to a separation of the layers from the substrate up to scrap production.
- a shutter mechanism in which a shutter is connected to an actuator via a coupling system in such a way that the shutter can be moved in a composite movement from an open position to a closed position via a coating source .
- the actuator only carries out a linear movement along a translation axis, with a groove curve converting a linear movement of the shutter into a tilting movement and again into a final linear movement until the shutter encloses the sputtering source.
- the shutter first carries out a linear movement along the translation axis of the actuator, then a rotary movement, e.g. B. by 90°, to the translation axis of the actuator and finally a linear movement again along the translation axis of the actuator.
- the aim is to achieve a compact arrangement.
- the arrangement should be low-maintenance and require little effort for repair work.
- the shutter system should be able to be positioned exactly in any required and desired position.
- the task is solved by a shutter system according to independent arrangement claim 1.
- the shutter system consists of a shutter for shielding a coating source in a vacuum system, the shutter being designed to be slidable in front of the coating source.
- the shutter is by means of a rotary and/or pivoting and/or folding or. Tilting movement over the Coating source can be positioned and the shutter is designed to provide an additional relative movement to the coating source and / or the coating source is designed to provide an additional relative movement to the shutter, the shutter covering the coating source in a sealing and gap-free manner.
- a sealing and gap-free covering means the complete shielding of the coating source from the rest of the process chamber, so that both any cross-contamination on the coating source and unwanted coatings on the substrate to be coated are prevented.
- the shutter of the shutter system is not only pivoted or rotated or folded or tilted over the coating source according to a first degree of freedom, but the shutter or the coating source are moved in a sealing manner relative to one another according to a second degree of freedom by a relative movement between the shutter and the coating source.
- the shutter carries out a lifting movement in the direction of the coating source or the coating source carries out a lifting movement in the direction of the shutter, so that the shutter and the coating source are positioned on one another in a sealing manner, i.e. completely closed. Particles are not created due to friction between the shutter plate and the coating source, as is the case when the shutter is simply swiveled over the coating source.
- the shutter is closed, there is no longer a gap, which prevents contamination of the target material by operating other sources in the same arrangement.
- the shutter can be operated, for example, by a rotational movement around an axis or by a pivoting movement to the side Driving in to the coating source must be positioned above the coating source. Only then does the relative movement or Stroke movement between shutter and coating source. Both movements can be carried out independently of one another, so that the shutter can be positioned in any required and desired position.
- the gas plasma is not deflected by the movements of the shutter.
- the proposed solution allows a much more compact arrangement of different coating sources to take place in a parallel and/or co-coating arrangement (e.g. sputtering arrangement), since cross-contamination of the coating sources is prevented. A large overhang of the shutter plates is no longer necessary.
- the relative movement between the shutter and the coating source is formed by means of bellows or ring seals and/or sliding feedthroughs. This reduces mechanical wear within the vacuum chamber to a minimum. Contamination due to abrasion or mechanical friction does not occur.
- the relative movement between the shutter and the coating source occurs by means of a lifting movement, which occurs either through the shutter or through the coating source.
- a lifting movement which occurs either through the shutter or through the coating source.
- Implementing the relative movement through the shutter system is usually the simpler method because of its mechanical feasibility.
- the execution of the relative movement by the coating source comes into play when a diaphragm is shared by several coating sources (e.g. pinhole diaphragms).
- a distance between the coating source and the shutter is designed to be adjustable. This has the advantage that at the start of the process to ignite the plasma during the sputtering process, the necessary gap between the coating source and the shutter can be set and in the actual coating process, especially with multiple coating sources, the respective coating source can be optimally shielded in a sealing manner. This is made possible by the separately controllable and independently executable movements of the shutter system.
- the shielding is optimized even further if, in a further embodiment of the shutter system according to the invention, the shutter has a cranked edge. Due to the cranked edge, the shutter acts like a kind of hood over the coating source, so that cross-contamination can be completely prevented.
- the shutter and the coating source have a round or oval or rectangular or polygonal shape.
- the shutter can be adapted to the shape of the coating source to be covered in order to seal it optimally. Due to the independently executable movement sequences (rotating and/or pivoting and/or folding or tilting movement as well as the additional relative movement) of the shutter, the shutter system according to the invention can also be adapted to any coating source in the simplest manner.
- the coating source is a sputtering target.
- Shutter system is the coating source Electron beam evaporator.
- the coating source is a boat and/or reversible evaporator.
- the coating source is an effusion cell.
- An effusion cell is a device for vaporizing the coating source materials in molecular beam epitaxy. in the production of thin layers in ultra-high and high vacuum. It consists of a crucible (usually, but not exclusively, made of pyrolytic boron nitride (PBN)) in which the coating source material is stored in solid form. The crucible is actively heated until the material evaporates, which then precipitates onto the substrate.
- PBN pyrolytic boron nitride
- the shutter system according to the invention can therefore be used for any coating source with a directed particle stream.
- An effective prevention of cross-contamination of the coating source and contamination of a substrate to be coated is therefore possible in a simple and compact manner.
- the object is also achieved by a method according to the invention according to independent method claim 10.
- the method comprises the following steps, the method being carried out with the shutter system according to the invention in accordance with the arrangement claims:
- the shutter When the coating source is switched off, the shutter seals the coating source. Before switching on the coating source, there is a relative movement of the shutter and the coating source A distance of 1 to 4 mm is set between the shutter and the coating source. As soon as stable process parameters have been established, the shutter is activated by rotating and/or swiveling and/or folding or Tilting movement opened. The shutter remains open during the substrate coating and only after completion of the substrate coating is the shutter swiveled or pushed or folded/tilted over the coating source and the coating source closed again in a sealing and gap-free manner by means of a relative movement between the coating source and the shutter.
- the control of the shutter system according to the invention allows the shutter to be held in any required and desired position.
- Fig. 1 Shutter system according to the invention with a coating source (a sputtering target) in a cross-sectional view; the shutter is in different positions above the coating source;
- a coating source a sputtering target
- Fig. 2 Shutter system according to the invention with a cranked edge in a coating system a) with the gap-free shutter closed, b) with the shutter open.
- Figure 1 shows an embodiment of the shutter system according to the invention in an arrangement with a coating source 1 in different positions of the shutter 2 during a coating process.
- the coating source 1 When the coating source 1 is switched off, it closes Shutter 2 sealing the coating source 1.
- the coating source 1 Before switching on the coating source 1, in particular when igniting the plasma during sputtering, a relative movement 4 of the shutter 2 and the coating source
- a distance 7 of 1 to 4 mm is set between the shutter 2 and the coating source 1.
- the shutter 2 is rotated and/or swiveled and/or folded or Tilting movement 5 completely opened.
- the advantage of the shutter system according to the invention is that the shutter completely seals off the coating sources 1. There are no cross-contaminations or unwanted parasitic coatings on the substrate.
- the control of the shutter system is located outside the vacuum chamber, so that abrasion caused by mechanical components inside the vacuum chamber is reduced to a minimum.
- FIG. 1 shows the shutter system according to the invention in one
- Trial Chamber 9 the shutter 2 is above the Coating source 1 positioned sealingly and without gaps. No coating material of the sputtering target 10 can get into the process chamber 9 or onto the substrate 8.
- the cranked edge 3 of the shutter 2 enables a gap-free arrangement that is completely closed off from the process chamber to be achieved.
- Figure 2b shows the same arrangement as in Figure 2a, only that the shutter has been turned or pivoted to the side or folded/tilted so that the substrate 8 can now be coated.
- either the shutter 2 or the coating source 1 carries out a linear stroke movement 4, i.e. H . either the shutter 2 moves away from the coating source 1 or the coating source 1 moves away from the shutter 2 and is then folded/tilted to the side, rotated or pivoted 5.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physical Vapour Deposition (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Coating Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022106546 | 2022-03-21 | ||
| DE102022129012.3A DE102022129012A1 (de) | 2022-03-21 | 2022-11-03 | Shuttersystem zum spaltfreien Abschirmen einer Beschichtungsquelle und zugehöriges Verfahren |
| PCT/EP2023/054345 WO2023179997A1 (de) | 2022-03-21 | 2023-02-22 | Shuttersystem zum spaltfreien abschirmen einer beschichtungsquelle und zugehöriges verfahren |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4496909A1 true EP4496909A1 (de) | 2025-01-29 |
Family
ID=85410079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23707883.7A Withdrawn EP4496909A1 (de) | 2022-03-21 | 2023-02-22 | Shuttersystem zum spaltfreien abschirmen einer beschichtungsquelle und zugehöriges verfahren |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20250210332A1 (de) |
| EP (1) | EP4496909A1 (de) |
| JP (1) | JP2025509915A (de) |
| KR (1) | KR20250004234A (de) |
| TW (1) | TW202342794A (de) |
| WO (1) | WO2023179997A1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58210166A (ja) * | 1982-06-02 | 1983-12-07 | Hitachi Ltd | スパツタ装置 |
| JP4562764B2 (ja) * | 2007-12-27 | 2010-10-13 | キヤノンアネルバ株式会社 | スパッタ装置 |
| US20130153413A1 (en) * | 2011-12-15 | 2013-06-20 | Intermolecular, Inc. | Sputter gun shutter |
| CN106435498B (zh) * | 2016-09-26 | 2019-01-29 | 中国电子科技集团公司第四十八研究所 | 一种磁控溅射靶挡板机构 |
| US20210140035A1 (en) | 2019-11-08 | 2021-05-13 | Kurt J. Lesker Company | Compound Motion Vacuum Environment Deposition Source Shutter Mechanism |
-
2023
- 2023-02-22 WO PCT/EP2023/054345 patent/WO2023179997A1/de not_active Ceased
- 2023-02-22 US US18/849,323 patent/US20250210332A1/en active Pending
- 2023-02-22 EP EP23707883.7A patent/EP4496909A1/de not_active Withdrawn
- 2023-02-22 KR KR1020247034482A patent/KR20250004234A/ko active Pending
- 2023-02-22 TW TW112106404A patent/TW202342794A/zh unknown
- 2023-02-22 JP JP2024556039A patent/JP2025509915A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| TW202342794A (zh) | 2023-11-01 |
| KR20250004234A (ko) | 2025-01-07 |
| US20250210332A1 (en) | 2025-06-26 |
| WO2023179997A9 (de) | 2024-07-18 |
| WO2023179997A1 (de) | 2023-09-28 |
| JP2025509915A (ja) | 2025-04-11 |
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