EP3529824A1 - Verfahren und vorrichtung zum bearbeiten einer oberfläche eines substrates mittels eines teilchenstrahls - Google Patents
Verfahren und vorrichtung zum bearbeiten einer oberfläche eines substrates mittels eines teilchenstrahlsInfo
- Publication number
- EP3529824A1 EP3529824A1 EP17793862.8A EP17793862A EP3529824A1 EP 3529824 A1 EP3529824 A1 EP 3529824A1 EP 17793862 A EP17793862 A EP 17793862A EP 3529824 A1 EP3529824 A1 EP 3529824A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- substrate
- particle beam
- pulsed
- processed
- region
- 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- Withdrawn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
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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
- C23C14/48—Ion implantation
-
- 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
- H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
- H01J37/305—Electron-beam or ion-beam tubes for localised treatment of objects for casting, melting, evaporating, or etching
- H01J37/3053—Electron-beam or ion-beam tubes for localised treatment of objects for casting, melting, evaporating, or etching for evaporating or etching
-
- 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
- C23C14/221—Ion beam deposition
-
- 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
- H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
- H01J37/304—Controlling tubes by information coming from the objects or from the beam, e.g. correction signals
-
- 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
- H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
- H01J37/305—Electron-beam or ion-beam tubes for localised treatment of objects for casting, melting, evaporating, or etching
- H01J37/3053—Electron-beam or ion-beam tubes for localised treatment of objects for casting, melting, evaporating, or etching for evaporating or etching
- H01J37/3056—Electron-beam or ion-beam tubes for localised treatment of objects for casting, melting, evaporating, or etching for evaporating or etching for microworking, e. g. etching of gratings or trimming of electrical components
-
- 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
- H01J37/3402—Gas-filled discharge tubes operating with cathodic sputtering using supplementary magnetic fields
- H01J37/3405—Magnetron sputtering
-
- 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
- H01J37/3464—Operating strategies
- H01J37/3467—Pulsed operation, e.g. HIPIMS
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3065—Plasma etching; Reactive-ion etching
-
- 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
- H01J2237/06—Sources
- H01J2237/08—Ion sources
-
- 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
- H01J2237/30—Electron or ion beam tubes for processing objects
- H01J2237/304—Controlling tubes
- H01J2237/30455—Correction during exposure
-
- 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
- H01J2237/30—Electron or ion beam tubes for processing objects
- H01J2237/304—Controlling tubes
- H01J2237/30466—Detecting endpoint of process
-
- 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
- H01J2237/30—Electron or ion beam tubes for processing objects
- H01J2237/304—Controlling tubes
- H01J2237/30472—Controlling the beam
- H01J2237/30483—Scanning
-
- 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
- H01J2237/30—Electron or ion beam tubes for processing objects
- H01J2237/31—Processing objects on a macro-scale
- H01J2237/3151—Etching
-
- 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
- H01J2237/30—Electron or ion beam tubes for processing objects
- H01J2237/317—Processing objects on a microscale
- H01J2237/3174—Etching microareas
Definitions
- the invention relates to a method and an apparatus for processing a surface of a substrate by means of a particle beam.
- Component surface applied, for example, if the
- Surface of a device has bumps and the surface of a target, ie. from a target surface, deviates, for example, has too much or too little material.
- a surplus of material can, for example, by means of
- Ion beam etching an ion beam is moved relative to a surface to be treated.
- the surface to be treated can be divided into several surface segments.
- the ion beam remains in each case during grating
- FIG. 4 shows a schematic cross-sectional view of a substrate 400 having a surface 406 which is adapted to a given homogeneity or roughness 402 by means of a
- Ion beam to be processed in each surface segment, one is to be treated
- the ion beam is repeated several times, i. in several irradiation passes,
- ion beams with high temporal constancy become the current density distribution used the entire process time to achieve a given precise local substrate removal or substrate deposition. For each scan, this may be a minimum amount of material, also referred to as a base etch 408 (base etch).
- base etch base etch
- the pedestal etching 406 is dependent on the beam profile of the ion beam, the energy of the ions, the technically maximum possible travel speed and the line feed.
- the amount of abradable material per scan is limited to a maximum of 404 due to thermal stress on the substrate. For example, with each scan, ion irradiation can provide a
- Material layer can be removed with a thickness in a range of 5 nm to 30 nm. To achieve larger ablations is therefore scanned several times over the substrate.
- the pedestal etch results in unnecessary removal of material over the entire surface of the device being treated, thereby unnecessarily processing time and reducing homogeneity in the target plane 402.
- an electrically switched ion beam is used whose pulse duration to the respective
- the total residence time to be used is divided equally between the number of scans S1, S2, S3. With each pulse, however, switching on and off of the ion beam is connected to the surface segment.
- flank profile Material removal is indicated by the on and off process temporal flank profile on.
- the flank profile as well as the place where the Heidelbergvorgan takes place may temporally and / or spatially have fluctuations.
- the flank profile causes a systematic error in ion beam etching.
- each irradiation period has edge profiles of the switching on and off of the ion beam, so that the systematic error of the individual periods accumulates. This reduces the precision of ion beam machining.
- a flank profile as well as the place where the Heidelbergvorgan takes place may temporally and / or spatially have fluctuations.
- the flank profile causes a systematic error in ion beam etching.
- each irradiation period has edge profiles of the switching on and off of the ion beam, so that the systematic error of the individual periods accumulates. This reduces the precision of ion beam machining.
- a method of processing a surface of a substrate by means of a particle beam includes
- Substrate processed with the particle beam that impinges unpulsed on the surface of the substrate In at least a second area of the surface of the substrate, the
- Edited particle beam that impinges pulsed on the surface of the substrate.
- the pulsed and unpulsed irradiation of the surface of the substrate may be performed in a scan, i. one
- the method comprises irradiating the surface of the substrate with the particle beam, wherein when irradiated in a first region of the surface of the substrate, the surface of the
- Substrate is processed with the particle beam which, pulsed at a first duty cycle, strikes the surface of the substrate.
- the surface of the substrate is processed with the particle beam pulsed at a second duty cycle, striking the surface of the substrate.
- the second duty cycle is different from the first duty cycle.
- the duty cycle can also be referred to as a duty cycle, sample rate or duty cycle.
- the surface can be divided into several, equal segments or areas, which by means of
- Particle beam processed ie irradiated, be.
- the segments are processed with the same or constant energy density of the particle beam per segment.
- Duty cycle results from the ratio of time with switched on beam in the segment to the total residence time of the beam in the segment.
- the duty cycle thus relates in various embodiments to the residence time per area segment.
- the size of a segment results from the beam profile of the particle beam, for example, the half-width of a Gaussian beam and / or the step size, i. the minimal, mechanical change of the position of the particle beam on the surface of the substrate.
- the non-processing of the surface of the substrate has a duty factor of 0.0.
- Unpulsed editing has a duty cycle of 1.0.
- Pulsed processing has a duty cycle greater than 0.0 and less than 1.0.
- the first duty cycle may have a value in a range of 0.0 to 1.0.
- the second duty cycle may have a value in a range of 0.0 to 1.0.
- Duty cycle for example, has a value greater than 0.0 and less than 1.0.
- the method has an unpulsed irradiation in which the surface of the substrate is processed with the particle beam, the
- Unpulsed irradiation may also be referred to as continuous wave irradiation.
- the pulsed irradiation can at
- Abscheidungsrate between the individual segments are varied, for example, to realize a pulse amplitude modulation or pulse frequency modulation.
- the dwell time per area segment or per pulse is reduced or increased with respect to an unpulsed processing
- Deposition rate can be varied and vividly the
- Amplitude of the pulse can be increased or reduced.
- pulsed processing may involve machining the surface of the substrate with relatively narrow pulses, i. less
- the feed rate is the advance of the particle beam within a scan line to control the residence time in the areas of the surface in the scan line.
- the line feed is the delivery of the particle beam from a scan line to the subsequent scan line.
- the line feed can have no direct influence on the residence time of the particle beam in each case in a region of the surface.
- the pulsed irradiation of the surface without or substantially without pulse break and with increased or reduced pulse amplitude, for example based on an unpulsed irradiation of the same area of the surface, ie by means of pulse amplitude modulation.
- the method further includes
- determining the number of pulsed processes may include determining pulse widths
- Duty cycle for the pulsed processing of the surface of the substrate with the particle beam From this, the required number of pulses whose width, (edge) shape and position determined, for example, be optimized, so that a systematic error of the method is reduced.
- the pulse distribution can, for example, the position of
- a reference point is, for example, the edge or the center of a region to be processed.
- Pulse distribution for example, a mirror-symmetric distribution of the pulses with respect to the center of a too
- the particle beam may strike the surface of the substrate in a pulsed manner such that the pulses are arranged symmetrically with respect to the center of the pulsed processed region. This allows a more homogeneous surface of the pulsed processed area.
- the method further comprises setting a base level above or below one Surface in at least a portion of the substrate.
- the substrate is pulsed in the area when the surface of the area is machined
- the area can otherwise be processed unpulsed or not processed by means of the particle beam.
- the base plane may be defined above or below a surface in at least a portion of the substrate.
- the substrate is pulsed in the region when the surface of the region is at a predetermined ratio to the base plane and the region is otherwise unpulsed or unprocessed.
- the base plane is the plane which is formed by means of a rough machining method, for example, a chemical mechanical polishing, on the average.
- a pulsed, erosive irradiation can
- Irradiation can be carried out, for example, in the event that the surface of a segment of the surface is arranged above the base plane or in the vicinity of the base plane.
- the surface is located, for example, in the vicinity of the base plane when a predetermined target plane is not yet reached by means of an unpulsed irradiation.
- material is removed from the surface of the substrate in an unpulsed manner. If the surface in this area is in the base plane, the type of irradiation for this area, i. the mode to be changed, for example, be switched to a pulsed material removal.
- the material removal can in this
- Target level is arranged. Subsequently, the editing can this area is a non-irradiation, ie the
- Particle beam can be used for the following scan passes
- the surface of the substrate is pulsed in various embodiments and processed unpulsed.
- the pulsed processing and the unpulsed processing can be carried out simultaneously or at different times, for example in different scan passes. If the surface is located slightly above the base plane, a pulsed
- Edit for example, have a superposition of pulsed and unpulsed processing. This can be done in
- Scanning operations are reduced and / or the precision of the processing can be increased, for example, the roughness or
- Ripple of the surface of the substrate can be reduced after processing.
- the method further comprises determining the first duty cycle and the second
- the pulsed irradiation takes place in an area of the surface after the unpulsed
- the unpulsed irradiation of a portion of the surface occurs after the pulsed irradiation of the same portion of the surface.
- the unpulsed irradiation of the entire surface of the substrate after the pulsed and unpulsed irradiation takes place in a region of the surface.
- the particle beam is a beam of neutral particles, an ion beam, a beam of particle bundles, a beam of neutral particle conglomerates (neutral particle clusters, so-called gas clusters), a beam of ionized particle conglomerates (so-called
- neutral particles are understood as outward, uncharged particles, for example, atoms, molecules or conglomerates of one of the two. However, neutral particles can be
- Surface with the particle beam material can be removed from the surface or part of the surface of the substrate. For example, editing is on
- Imaging with the particle beam material deposited on the surface or part of the surface of the substrate is a magnetron sputtering. Magnetron sputtering occurs in the radiation source
- coiled web for example a helix
- Sputtering material of the radiation source circuits This lengthens the path length of the electrons in the excitation gas and increases the number of collisions per charge carrier. The result is an intense low-pressure plasma, a so-called gastric plasma.
- Magnetronplasmas are accelerated by an electrical potential on the surface of the sputtering material and dissolve neutral particles from this surface via impact processes of the sputtering material. These triggered neutral particles in turn form a particle flow in
- the beam may also be referred to as a neutral particle beam.
- the beam may also be referred to as a neutral particle beam.
- the beam may also be referred to as a neutral particle beam.
- Magnetron sputter a high-energy impulse magnetron sputtering HiPIMS.
- a pulser i. a circuit breaker, used for power control.
- a pulsed discharges with powers greater than 1 MW magnetron sputtering a higher degree of ionization of the particle beam can be achieved, which can for example lead to a change in the properties of a grown layer, such as a higher adhesive strength of the grown layer.
- the first area may be different than the second area.
- the second area may be different in time and / or space.
- the second area is arranged next to the first area.
- the second area may be at a different time, i. another irradiation, be pulsed processed as the first area.
- the method further includes
- surface texture may be before
- Irradiation can be detected. Based on the
- Surface texture can be a base plane, a
- Target level the size of the segments of the surface and the duty cycle of the irradiation in the individual
- Radiation passes are determined per segment.
- the heat input into the substrate can be reduced since Part of the amount of heat between the scans is dissipated by heat dissipation and heat radiation. This allows the thermal stress in the first area
- the method further comprises determining a target plane above or below the surface of the substrate.
- the substrate is in at least one
- the method further comprises further irradiating the surface of the substrate. Upon further irradiation is in a range of
- the particle beam is blocked, so that the surface in this area is not processed by the particle beam.
- the blocking of the particle beam can take place, for example, by means of a shutter and / or switching off the particle beam.
- the method has at least one other, further irradiation.
- Irradiation is processed on the other, further irradiation with the particle beam which impinges pulsed on the surface of the substrate.
- a previously unpulsed area can be pulsed at another time, for example in a later scan.
- an apparatus for processing a surface of a substrate by means of a particle beam has a particle beam source which is adapted to Surface of the substrate to be processed with a particle beam.
- the device also has a
- Source control for controlling the particle beam on.
- the source control is for irradiating the surface of the
- Substrate is arranged with the particle beam, wherein in a first region of the surface of the substrate, the surface of the substrate is processed with the particle beam which impinges unpulsed on the surface of the substrate; and wherein, in a second region of the surface of the substrate, the surface of the substrate is processed with the particle beam pulsed on the surface of the substrate.
- an apparatus for processing a surface of a substrate by means of a particle beam has a particle beam source which is set up to process the surface of the substrate with a particle beam.
- the device also has a particle beam source which is set up to process the surface of the substrate with a particle beam.
- the device also has a particle beam source which is set up to process the surface of the substrate with a particle beam.
- Source control for controlling the particle beam on.
- the source control is for irradiating the surface of the
- Substrate is processed with the particle beam, wherein in a first region of the surface of the substrate, the surface of the substrate is processed with the particle beam, which, pulsed with a first duty cycle, striking the surface of the substrate; and wherein in a second region of the surface of the substrate, the surface of the substrate is processed with the particle beam, with a second
- Pulsed pulsed strikes the surface of the substrate, wherein the second duty cycle is different from the first duty cycle.
- the device has a
- Process chamber on. At least a part of the radiation source and the substrate are arranged in the process chamber, for example during the irradiation. Embodiments of the invention are illustrated in the figures and are explained in more detail below.
- Figure 1 shows a device according to various aspects
- Figure 2 is a block diagram for source control of a
- Figure 3 is a diagram of the method according to various aspects
- FIG. 1 schematically illustrates a device 100.
- a device 100 is suitable, for example, for the surface of a substrate 114 by means of a
- Particle beam 104 to edit.
- the device 100 has a particle beam source 102 which is set up to emit a particle beam 104 which impinges on a region of the surface of the substrate 114 in a region 106 (also called impinging region).
- the particle beam source 102 is adapted to process the surface of the substrate with a particle beam, for example to remove a material of the substrate or to deposit a material on the surface.
- the radiation source 102 is an ion beam source and the particle beam 104 is, for example, a focusing ion beam having a Gaussian shape
- the ion beam is used in this example to remove a thin layer from a substrate.
- the ion beam source may be configured as a wide-beam ion beam source.
- the apparatus 100 further includes a source controller 112 for controlling the particle beam 104.
- a source controller 112 may alter, control, pause, cancel and / or readjust the parameters and properties of the particle beam automatically or manually or with a corresponding combination. This can, for example, the position or the electrical operating currents for various components of
- Particle beam source 102 relate. Likewise, this can
- Source control 112 relates to direct or indirect parameters of the particle beam 104, such as properties of a beam neutralizer, composition and dose for source gases for the particle beam source, and / or temperatures of various components.
- the source controller 112 may alter the parameters of the particle beam source 102 and thus the particle beam 104. For example, an acceleration voltage can be changed, which has an effect on the kinetic energy of the charged particles in the particle beam.
- Source controller 112 may also include and control or regulate a gas supply (not shown) or plasma excitation (not shown) to the particle beam source 102 such that the number of particles in the particle beam 104
- a gas supply can be general for
- Plasma excitation is generally required for charged particle beam sources to supply the necessary charge carriers (e.g., ions) to a charged or non-neutral particle beam 104 from the supplied gas
- the source controller 112 is configured with the particle source 102 to irradiate the surface of the substrate 114, wherein in a first region of the surface of the substrate 114, the surface of the substrate 114 is processed with the particle beam 104 impinging unpulsed on the surface of the substrate 114 in a second area of Surface of the substrate 114, the surface of the substrate 114 is processed with the particle beam 104, the pulsed impinges on the surface of the substrate 114.
- the source control 112 for irradiation is arranged such that in a first region of the surface of the substrate 114, the surface of the substrate 114 is processed with the particle beam 104, which, pulsed with a first duty cycle, strikes the surface of the substrate 114 and in a second area of
- the surface of the substrate 114 is processed with the particle beam 104, pulsed with a second duty cycle, strikes the surface of the substrate 114, wherein the second duty cycle is different from the first duty cycle.
- the source controller 112 is further arranged with the particle source 102 for unpulsed irradiation of the surface of the substrate, wherein in the unpulsed irradiation the
- Substrate 114 hits.
- the device 100 has a
- Process chamber 122 on. At least part of the
- Radiation source 102 and substrate 114 are in the
- Process chamber 122 is arranged, for example during irradiation.
- the device 100 has a process chamber 122 shown in section, in the interior of which a particle beam source 102 is arranged, which is set up to emit a particle beam 104.
- the particle beam source 102 may be in a wall of the
- Process chamber 122 may be mounted (movable or fixed) or mounted within the process chamber 122 (for example, on the bottom of a door of the process chamber 122, for example on a carriage on which the particle beam source 102 is fixed and along which the particle beam source 102 can be moved).
- the process chamber 122 may further include a temperature controller that controls the temperature of the process chamber walls and adjacent devices.
- a temperature controller that controls the temperature of the process chamber walls and adjacent devices.
- a temperature controller may be useful, since the result of processing the substrate 114 with the particle beam 104 may be temperature-dependent.
- An electrical connection for example to a ground, may be useful in various embodiments to counteract an electrical charge of the substrate 114 during processing with the particle beam.
- the process chamber 122 may further include a
- the substrate is electrically connected to a reference potential, for example a ground potential, to prevent charging.
- the process chamber 122 may also be a suitable
- the position of the particle beam source 102 can by means of a holder (not shown) and by means of
- Source control 112 to be changed.
- the holder may be configured to allow a translatory movement in one, in two or in all three spatial directions and / or a rotary movement around one, two or around all three spatial axes.
- the substrate can be moved accordingly.
- the particle beam 104 may impinge on an impact region 106 on the surface of the substrate.
- Processing a substrate 114 have the following:
- a substrate 114 may be premeasured, for example, the surface finish, such as the
- Asperity be determined interferometrically.
- the information of the surface unevenness can in one
- Memory of a determination device 122 for example, a processor, such as a programmable
- Initial state of the substrate 114 are stored.
- the substrate 114 may then be held in the substrate holder and the process chamber 122 may be held by means of a
- Vacuum system to be evacuated to a suitable process pressure.
- the holder may be positioned such that the particle beam 104 impinges on a shield, for example a diaphragm, when the particle beam source 102 is switched on.
- Particle beam source 102 are turned on. Depending on
- Particle beam source 102 has a stable particle beam 104, ie, for example, that the particle 104 has only small fluctuations in intensity.
- the impact area 106 of the particle beam 104 can be changed.
- the substrate 114 it may be advantageous for the substrate 114 to be in the plane of the focus of the particle beam 104. As a result, the impact area 106 is in its
- the substrate 114 may be located out of the plane of the focus. As a result, the thermal power density can be reduced.
- the two-dimensional removal rate of the particle beam 104 on the substrate 114 can be determined. This two-dimensional
- Removal rate can be the Gaussian two-dimensional
- the substrate 114 can be brought to the substrate holder in the process chamber 122 and the process chamber 122 by means of a vacuum system to a suitable
- the particle beam source 102 can then be put into operation with a stable particle beam 104.
- Distribution density function of the particle beam can be performed. This can lead to a two-dimensional distribution density function being adapted in the corresponding parameters such that a two-dimensional distribution density function is used
- Determination device 122 take place. This calculation may use the two-dimensional correlated distribution density function to determine a motion profile for the particle beam 104 relative to the substrate 114. Alternatively, the two-dimensional removal rate of the foot point may be used to create this motion profile and store it in a memory of the source controller 112, for example. This movement profile can be positions, respective
- Impact area 106 of the particle beam 104 on the substrate include.
- the motion profile may include data for velocities, which velocities describe the velocity of movement of the particle beam 104 relative to the surface of the substrate 114.
- the motion profile can have one, two or more scan passes.
- a scan pass the first scan pass
- a particle beam pulsed, unpulsed or not impinge on the surface of the substrate.
- the detector 122 may be electrically connected to the source controller 112 and / or the bracket (not shown) so that the motion profile may be performed. Subsequently, by means of the source control 112 and the holder, the impact area 106 of the particle beam 104 can be guided over the surface of the substrate 114 in accordance with the movement profile, which corresponds to a processing of the surface of the substrate 114. The processed substrate 114 may then be removed from the process chamber 122. An implemented in the determination means 122
- the method may calculate the motion profile such that the surface of the substrate after the
- the time averaged beam intensity in a pulsed particle beam By using a pulsed particle beam, the time averaged beam intensity in a pulsed particle beam, the time averaged beam intensity in a pulsed particle beam, the time averaged beam intensity in a pulsed particle beam, the time averaged beam intensity in a pulsed particle beam, the time averaged beam intensity in a pulsed particle beam, the time averaged beam intensity in a pulsed particle beam, the time averaged beam intensity in a
- the movement profile is in different
- Embodiments Part of a method for processing a surface of a substrate 114 by means of
- the method comprises irradiating the surface of the
- Substrate 104 with the particle 104 on Upon irradiation, in a first region of the surface of the substrate, the surface of the substrate is processed with the particle beam which impinges unpulsed on the surface of the substrate. In a second area of the surface of the substrate, the surface of the substrate when irradiated with the
- Edited particle beam that impinges pulsed on the surface of the substrate.
- the surface of the substrate is processed with the particle beam, which, pulsed with a first duty cycle, strikes the surface of the substrate.
- Pulsed pulsed hits the surface of the substrate.
- the second duty cycle is different from the first duty cycle.
- the pulsed irradiation takes place, for example, after an unpulsed irradiation of the surface of the substrate and / or of a region of the surface of the substrate.
- the unpulsed irradiation of the surface of the substrate takes place, for example, after an unpulsed irradiation of the surface of the substrate and / or of a region of the surface of the substrate.
- the particle beam is, for example, a beam of neutral particles, a cluster beam, a cluster ion beam, an ion beam or an electron beam.
- the method of processing a surface of a substrate is magnetron sputtering.
- material can be removed from the surface of the substrate and / or material on the surface of the substrate
- the first area ie the unpulsed area
- the second area ie the pulsed area.
- the non-pulsed area can be processed pulsed in a later processing, such as another scan. All components of the device, such as current measuring device, bracket or current probe can be adapted to the particular environment. For example, in the case of operation of the device in a vacuum
- FIG. 2 shows a block diagram for source control of a device according to various embodiments.
- the source controller 112 has one or more terminals 202 by means of which the device may be connected or integrated in a device-external environment, for example a safety controller or a controller
- the source controller 112 may include a processor 204, a computer 204, or other computing device 204 (hereinafter referred to as a process module computer PMC) that receives and evaluates and controls the individual signals of the components and modules of the device.
- PMC process module computer
- the PMC 204 may be a freely programmable processor
- a microprocessor or a nanoprocessor or a hard-wired logic, or a firmware or, for example, an application-specific integrated circuit (ASIC) or a field-programmable gate array (FPGA).
- ASIC application-specific integrated circuit
- FPGA field-programmable gate array
- an axis system 206 that includes a particle beam circuit 208 (beam) and an acceleration circuit 210 (also
- accelerator circuit 210 by means of a Switch circuit 212 is connected to the
- the particle beam switching circuit 208 and the acceleration circuit 210 may each have a power supply, which may in principle be technically equal to each other.
- the switch circuit 212 may each have an electrically switchable switch, for example a
- the switch circuit 212 may be so
- Particle beam switching circuit 208 and the accelerator circuit 210 can be electrically connected to the radiation source 102 and, alternatively, a
- Ground potential or another electrical potential to the radiation source 102 are switched. Thereby, the particle beam can be easily pulsed and the position of the pulses on the surface and its energy can be easily adjusted.
- FIG. 3 shows a diagram of the method according to various exemplary embodiments.
- the motion profile described above may, in various embodiments, include a method 300 of processing a surface 302 of a substrate by means of a method
- Be particle beam 104 Be particle beam 104.
- FIG. 3 a cross-sectional profile of a surface 302 of a substrate to be processed by means of a particle beam 104 is shown.
- the particle beam is in several passes (scans) Sl, S2, S3 over the surface driven or guided. Meanwhile, material may be pulsed 310 from the surface of the substrate, ie
- CW operation 306 are removed or the surface remains unprocessed. For example, if the surface is not processed, the particle beam is turned off or blocked, leaving no material from the surface
- the non-edit has a duty cycle of 0.0.
- Unpulsed editing has a duty cycle of 1.0.
- Pulsed processing has a duty cycle greater than 0.0 and less than 1.0.
- Ablation rate 332 can be obtained at constant energy density of the particle beam by means of the residence time per position
- the residence time can be adjusted for example by means of the feed rate of the particle beam.
- Feed rate and thus the residence time a modulation of the absorbed dose can be achieved.
- a change in the feed rate and thus the dwell time is / would be from the velocity profile 334 of FIG.
- Particle beam visible the
- Particle beam at a lower speed over a first region 336 are performed as a second region 338th
- the surface to be processed can be irradiated at maximum speed for segments with a surface substantially below a base plane 320 and at lower speed in the edge region (illustrated in the diagram 334 for the respective scans).
- the surface of the substrate exposed in the respective scan of the plurality of scans S1, S2, S3 is processed in such a way by means of the particle beam 104 that the largest possible portion 318 of the material in a segment is unpulsed
- a remaining remainder 314 is removed by pulsing in a scan by means of the smallest possible duty cycle.
- the duty cycle can be realized by means of a pulse or by means of a plurality of pulses, which are for example applied symmetrically to the center of a segment in the segment.
- the number of pulses can be reduced or minimized.
- the error generated by the flanks of the pulses in the processing of the substrate can be reduced compared to a purely pulsed processing.
- the error caused by the flanks and the position assignment of the pulses for example, by the continuous particle beam profile when switching on and off the impact of the particle beam on the surface
- the method includes, for example, detecting a
- Excess material or the lack of material can be determined starting from the surface 302 of the substrate with respect to a predetermined target plane 330.
- the target plane 330 is, for example, a layer thickness to be achieved and / or homogeneity of the surface of the substrate.
- the method may include determining a target plane 330 above or below the surface 302 of the substrate.
- the substrate can be processed at least in a region of the surface of the substrate until it reaches the target plane.
- the surface 302 can be divided into several segments.
- the segments are, for example, flat,
- the method may further include defining a base plane 320 above or below a surface 302 in at least a portion of the substrate.
- the substrate can be defining a base plane 320 above or below a surface 302 in at least a portion of the substrate.
- Base level 320 meets a predetermined condition.
- pulsed processing may take place if the surface 302 of the respective segment should be below the base plane 320
- Segments with a surface above the Base level can be arranged. Segments with a surface above the Base level can be processed, for example, unpulsed, whereby a quick material removal takes place.
- the base plane 320 may be below and / or above the
- Surface 302 of the segments of the substrate may be arranged.
- the base plane 320 is a plane that, by means of a coarse editing of the
- Surface of the substrate is obtained, for example by means of a (chemical) mechanical polishing.
- the base plane 320 is a plane up to the achievement of which only the feed rate for varying the dwell time is used.
- a number of pulsed processes 310 and unpulsed processings 308 may be determined to detect from the surface 302 prior to the beginning of the process
- the determination of the number of pulsed processing 308 may include, for example, determining pulse widths, pulse amplitudes, pulse shapes, and / or pulse distribution.
- the method includes, for example, determining the
- Duty cycle for each area of the surface to be machined By controlling the duty cycle, power and current density fluctuations of the beam source can be compensated within a designated error range, as may occur, for example, by thermal drifting.
- the temporally averaged source emission current can be used as the measured variable and the
- Duty cycle are adjusted so that the source - emission current and thus the time averaged
- Process parameter is kept constant.
- the particle beam may hit the surface of the substrate in a pulsed manner such that the pulses are symmetrical to the center of the pulsed processed region, ie
- the symmetrically pulsed irradiated segments have thereby, for example, in relation to a point-symmetrical to the center of the segment point-symmetric machining and / or with respect to an asymmetric machining, a higher homogeneity.
- the pulsed processing includes multiple pulses 304 that may be located at the edge or between the edge and the center of a segment.
- the method includes further irradiating 312 the surface of the substrate. Upon further irradiation 312 is in a range of
- the particle 104 is blocked, for example by means of a shutter or by means of a switch circuit of the source controller 112. By blocking can be prevented, that the surface in this area is processed by the particle beam.
- the beam source for example the ion source, can be switched off completely, i. the
- Duty cycle is 0.0.
- the ion beam is guided from one position to another position of the substrate without performing a processing without coating or etching surface segments.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Analytical Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
- Drying Of Semiconductors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016119791.2A DE102016119791A1 (de) | 2016-10-18 | 2016-10-18 | Verfahren und Vorrichtung zum Bearbeiten einer Oberfläche eines Substrates mittels eines Teilchenstrahls |
PCT/EP2017/076448 WO2018073231A1 (de) | 2016-10-18 | 2017-10-17 | Verfahren und vorrichtung zum bearbeiten einer oberfläche eines substrates mittels eines teilchenstrahls |
Publications (1)
Publication Number | Publication Date |
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EP3529824A1 true EP3529824A1 (de) | 2019-08-28 |
Family
ID=60245050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP17793862.8A Withdrawn EP3529824A1 (de) | 2016-10-18 | 2017-10-17 | Verfahren und vorrichtung zum bearbeiten einer oberfläche eines substrates mittels eines teilchenstrahls |
Country Status (6)
Country | Link |
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US (1) | US20200043699A1 (de) |
EP (1) | EP3529824A1 (de) |
JP (1) | JP2019533293A (de) |
CN (1) | CN110073462A (de) |
DE (1) | DE102016119791A1 (de) |
WO (1) | WO2018073231A1 (de) |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4344019A (en) * | 1980-11-10 | 1982-08-10 | The United States Of America As Represented By The United States Department Of Energy | Penning discharge ion source with self-cleaning aperture |
JPS58106750A (ja) * | 1981-12-18 | 1983-06-25 | Toshiba Corp | フオ−カスイオンビ−ム加工方法 |
US4740267A (en) * | 1987-02-20 | 1988-04-26 | Hughes Aircraft Company | Energy intensive surface reactions using a cluster beam |
US5389195A (en) * | 1991-03-07 | 1995-02-14 | Minnesota Mining And Manufacturing Company | Surface modification by accelerated plasma or ions |
US6137110A (en) * | 1998-08-17 | 2000-10-24 | The United States Of America As Represented By The United States Department Of Energy | Focused ion beam source method and apparatus |
DE10010706C2 (de) * | 2000-03-04 | 2002-07-25 | Schwerionenforsch Gmbh | Hohlkathoden-Sputter-Ionenquelle zur Erzeugung von Ionenstrahlen hoher Intensität |
DE10351059B4 (de) * | 2003-10-31 | 2007-03-01 | Roth & Rau Ag | Verfahren und Vorrichtung zur Ionenstrahlbearbeitung von Oberflächen |
JP3816484B2 (ja) * | 2003-12-15 | 2006-08-30 | 日本航空電子工業株式会社 | ドライエッチング方法 |
DE102005017632B4 (de) * | 2005-04-15 | 2010-04-08 | Leibniz-Institut für Oberflächenmodifizierung e.V. | Verfahren zur Modifikation der Oberfläche einer Probe mittels eines gepulsten Ionenstrahls oder mittels eines ionenstrahlgenerierten Teilchenstrahls mit homogen oder gaußförmig verteilter Stromdichte |
WO2010135444A2 (en) * | 2009-05-20 | 2010-11-25 | Carl Zeiss Nts, Llc | Simultaneous sample modification and monitoring |
US8354655B2 (en) * | 2011-05-03 | 2013-01-15 | Varian Semiconductor Equipment Associates, Inc. | Method and system for controlling critical dimension and roughness in resist features |
US20120302065A1 (en) * | 2011-05-26 | 2012-11-29 | Nanya Technology Corporation | Pulse-plasma etching method and pulse-plasma etching apparatus |
KR101156184B1 (ko) * | 2011-10-21 | 2012-07-03 | 한국생산기술연구원 | 전자빔 및 이온빔을 이용한 피니싱 장치 및 방법 |
DE102012022168A1 (de) * | 2012-11-12 | 2014-05-28 | Carl Zeiss Microscopy Gmbh | Verfahren zum bearbeiten eines materialstücks |
CN103531429B (zh) * | 2013-10-31 | 2016-03-02 | 中微半导体设备(上海)有限公司 | 等离子体刻蚀装置及其刻蚀方法 |
EP3077566A1 (de) * | 2013-12-04 | 2016-10-12 | Oerlikon Advanced Technologies AG | Sputterquellenanordnung, sputtersystem und verfahren zur herstellung metallbeschichteter plattenförmiger substrate |
JP6689602B2 (ja) * | 2014-12-22 | 2020-04-28 | カール ツァイス マイクロスコーピー エルエルシー | 荷電粒子ビームシステム及び方法 |
-
2016
- 2016-10-18 DE DE102016119791.2A patent/DE102016119791A1/de active Pending
-
2017
- 2017-10-17 CN CN201780076549.0A patent/CN110073462A/zh active Pending
- 2017-10-17 WO PCT/EP2017/076448 patent/WO2018073231A1/de unknown
- 2017-10-17 JP JP2019521048A patent/JP2019533293A/ja active Pending
- 2017-10-17 US US16/342,949 patent/US20200043699A1/en not_active Abandoned
- 2017-10-17 EP EP17793862.8A patent/EP3529824A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
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CN110073462A (zh) | 2019-07-30 |
WO2018073231A1 (de) | 2018-04-26 |
US20200043699A1 (en) | 2020-02-06 |
DE102016119791A1 (de) | 2018-04-19 |
JP2019533293A (ja) | 2019-11-14 |
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