WO2005098081A1 - 成膜装置および成膜方法 - Google Patents
成膜装置および成膜方法 Download PDFInfo
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- WO2005098081A1 WO2005098081A1 PCT/JP2005/005942 JP2005005942W WO2005098081A1 WO 2005098081 A1 WO2005098081 A1 WO 2005098081A1 JP 2005005942 W JP2005005942 W JP 2005005942W WO 2005098081 A1 WO2005098081 A1 WO 2005098081A1
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- Prior art keywords
- film
- film forming
- substrate
- gas
- thin film
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 33
- 239000010408 film Substances 0.000 claims abstract description 205
- 239000007789 gas Substances 0.000 claims abstract description 65
- 238000010884 ion-beam technique Methods 0.000 claims abstract description 46
- 239000010409 thin film Substances 0.000 claims abstract description 43
- 238000006243 chemical reaction Methods 0.000 claims abstract description 39
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 25
- 239000012495 reaction gas Substances 0.000 claims abstract description 13
- 230000001678 irradiating effect Effects 0.000 claims abstract description 12
- 230000001133 acceleration Effects 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims description 90
- 150000002500 ions Chemical class 0.000 claims description 68
- 238000004544 sputter deposition Methods 0.000 claims description 22
- 238000005530 etching Methods 0.000 claims description 17
- 238000007254 oxidation reaction Methods 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- -1 oxygen ions Chemical class 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 150000004767 nitrides Chemical class 0.000 claims description 5
- 238000005121 nitriding Methods 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000010894 electron beam technology Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 16
- 239000002184 metal Substances 0.000 abstract description 11
- 229910052751 metal Inorganic materials 0.000 abstract description 11
- 239000012788 optical film Substances 0.000 abstract description 8
- 238000002834 transmittance Methods 0.000 description 26
- 230000003746 surface roughness Effects 0.000 description 19
- 230000000694 effects Effects 0.000 description 12
- 238000000151 deposition Methods 0.000 description 9
- 230000008021 deposition Effects 0.000 description 9
- 239000002245 particle Substances 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 230000031700 light absorption Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000003475 lamination Methods 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052774 Proactinium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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
- C23C14/0021—Reactive sputtering or evaporation
- C23C14/0036—Reactive sputtering
- C23C14/0073—Reactive sputtering by exposing the substrates to reactive gases intermittently
- C23C14/0078—Reactive sputtering by exposing the substrates to reactive gases intermittently by moving the substrates between spatially separate sputtering and reaction stations
-
- 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
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
- C23C14/083—Oxides of refractory metals or yttrium
-
- 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
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/10—Glass or silica
-
- 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
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
-
- 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
- C23C14/50—Substrate holders
-
- 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
- C23C14/54—Controlling or regulating the coating process
- C23C14/548—Controlling the composition
-
- 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
- C23C14/58—After-treatment
- C23C14/5826—Treatment with charged particles
- C23C14/5833—Ion beam bombardment
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
-
- 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
Definitions
- the present invention relates to a film forming apparatus and a film forming method for forming a metal film, a dielectric film, and the like on a film forming surface (surface) of a substrate, and particularly to a film forming apparatus and a film forming method for forming a film having high smoothness. It relates to the film formation method. Further, the present invention relates to a film forming apparatus and a film forming method capable of forming a uniform and smooth film on a substrate having irregularities such as grooves on the surface.
- the aspect ratio (depth Z hole diameter or groove width) of contact holes and wiring grooves formed on the substrate tends to increase in order to increase the mounting density of the substrate.
- a noria layer and a seed layer for electrolytic plating must be formed inside such a hole groove (side wall or bottom surface).
- an optical element in which an excellent optical film is laminated on a substrate having a step has attracted attention.
- an optical film with excellent coverage following the shape of the step and with extremely low light absorption and diffuse reflection, that is, high light transmittance and excellent surface smoothness, is indispensable. Te ru.
- Patent Document 1 JP-A-8-264487 (Pages 5-10, Figure 2-3)
- Patent Document 2 Japanese Patent No. 2602276 (Pages 4-6, Figures 1 and 13)
- an object of the present invention is to form an optical film having optical characteristics close to a design value by continuously forming a thin film on an optical film while irradiating each thin film with an ion beam.
- an overhang (a film formed so as to cover the opening) is formed on a shoulder (opening edge) of the recess, and sputter particles are formed by the overhang. And it is difficult to reach the bottom. For this reason, a film having a desired thickness is not formed uniformly on the bottom surface of the concave portion, and when the wiring or the optical thin film is embedded in the concave portion, the embedding characteristics are poor. In addition, force norge (uniform film formation along the unevenness) on the uneven substrate surface is not performed well. Further, when the surface roughness of the film formed on the substrate is large, the light transmittance is reduced and the optical loss is increased.
- the present invention provides a method of forming a dielectric film by irradiating an ion beam to a film formation surface of a substrate to promote the reactivity of the film formed on the film formation surface. It is another object of the present invention to provide a film forming apparatus having high light transmittance and high surface smoothness.
- a film having good embedding characteristics and coverage can be formed on a substrate having an uneven surface by optimizing the type of gas to be irradiated by the ion gun and the accelerating voltage of the ion beam. It is an object of the present invention to provide a film forming apparatus capable of reducing the surface roughness of a film.
- the invention according to claim 1 of the film forming apparatus of the present invention provides a holding member for holding a substrate in a vacuum chamber capable of evacuating a vacuum, and forming a thin film on the substrate.
- the irradiation of the ion beam accelerates the reaction between the thin film and the reaction gas and forms the thin film. It has a configuration to form a laminated thin film by partially etching, shifting, or both!
- the invention according to claim 2 is characterized in that, in addition to the above configuration, the holding member is a cylindrical rotating drum that rotates, and holds the substrate on the peripheral surface of the rotating drum.
- the invention according to claim 3 is characterized in that the holding member is a plate-shaped rotating disk that rotates, and the substrate is held on the plate surface of the rotating disk.
- the invention according to claim 4 is characterized in that a plurality of film forming means are provided.
- the invention according to claim 5 is characterized in that one or both of the oxide film and the nitride film are formed by the film forming means and the reaction means.
- the invention according to claim 6 is characterized in that the film forming means is a sputtering means.
- the invention according to claim 7 is characterized in that the acceleration voltage applied to the ion gun is set to 500 V to 3000 V.
- the invention according to claim 8 is characterized in that the gas forming the ion beam is one of an oxidizing gas for supplying oxygen ions and a nitriding gas for supplying nitrogen ions.
- the invention according to claim 9 is characterized in that the substrate is irradiated with the ion beam almost perpendicularly.
- the invention according to claim 10 is characterized in that a thin film formed so as to inhibit a thin film from adhering to a concave portion on a substrate having irregularities is irradiated with an ion beam.
- a film forming apparatus having such a configuration, for example, by repeatedly performing formation of a metal film, promotion of a reaction by a gas reaction and an ion beam, and etching, a convex portion that forms the film roughness is etched and surface roughness is formed. As the ion beam becomes smaller, the gas reaction is promoted by the ion beam, and a good film is formed.
- An invention according to claim 11 of the film forming method of the present invention is a film forming step of forming a thin film on a substrate held by a holding member in a vacuum chamber capable of evacuating, and forming the formed thin film by plasma.
- the holding member is a cylindrical rotating drum that rotates, and holds the substrate on the peripheral surface of the rotating drum, while rotating the rotating drum. It has a configuration characterized in that thin films are stacked by a film forming step, a reaction step, and an irradiation step.
- the invention according to claim 13 is characterized in that the holding member is a spinning plate-shaped rotating disk, and the substrate is held on the plate surface of the rotating disk.
- a thin film is laminated by a process and an irradiation process.
- the invention according to claim 14 is characterized in that the film forming step of forming a thin film is a step of forming a plurality of thin films by a plurality of film forming means.
- the invention according to claim 15 is characterized in that either or both of the oxide film and the nitride film are formed by the film forming step and the reaction step.
- the invention according to claim 16 is characterized in that the film forming step is a step of forming a thin film by sputtering.
- the invention according to claim 17 is characterized in that the acceleration voltage applied to the ion gun is changed from 500 V to 3000 V.
- the invention according to claim 18 is characterized in that the gas forming the ion beam is any one of an oxidizing gas for supplying oxygen ions and a nitriding gas for supplying nitrogen ions.
- the invention according to claim 19 is characterized in that the substrate is irradiated with the ion beam almost perpendicularly.
- the invention according to claim 20 is characterized in that a thin film formed so as to prevent the thin film from adhering to the concave portion with respect to the substrate having the unevenness, is irradiated with an ion beam. .
- a part of the film is etched by ion beam irradiation.
- the overhang formed on the shoulder of the concave portion is etched (removed), and the opening of the concave portion is widened. .
- the sputtered particles can easily reach the side walls and the bottom surface of the concave portion, and the film formation on the side walls and the bottom surface is favorably performed.
- the board table The coverage on the surface is improved, and a film having a desired thickness is uniformly formed on the bottom surface of the concave portion, and the embedding characteristics are improved.
- the projections forming the film roughness are etched, the surface roughness is reduced.
- the surface roughness of the film is reduced by repeatedly performing the formation of the metal film, the gas reaction, the reaction promotion by the ion beam, and the etching.
- a good film can be formed.
- a film having good embedding characteristics and coverage can be formed on a substrate having an uneven surface, and the surface roughness of the film can be reduced.
- the force only the ion gun is provided, so the structure of the device is simple.
- FIG. 1 is a conceptual plan view showing a film forming apparatus according to Embodiment 1.
- FIG. 2 is a schematic sectional view showing a configuration of an ion gun in the film forming apparatus according to Embodiment 1.
- FIG. 3 is a view showing a surface roughness of a film in the first embodiment.
- FIG. 4 is a view showing the transmittance of a film in Embodiment 1.
- FIG. 5 is a diagram showing the light absorptance per layer of a film and the surface roughness after 23 laminations in Embodiment 2.
- FIG. 6 is a conceptual plan view showing a film forming apparatus according to Embodiment 3.
- FIG. 7 is a cross-sectional view showing a state of film formation on the first substrate when the ion gun is not operated in the third embodiment.
- FIG. 8 is a cross-sectional view showing a state of film formation on a second substrate when the ion gun is not operated in the third embodiment.
- FIG. 9 is a cross-sectional view showing a state of film formation on a first substrate when an ion gun is operated in Embodiment 3.
- FIG. 10 is a cross-sectional view showing a state of film formation on a second substrate when an ion gun is operated in the third embodiment.
- FIG. 11 is a cross-sectional view showing a film formation state on a third substrate when an Ar gas of 30 sccm is supplied to the ion gun in the fourth embodiment.
- Embodiment 4 an ion gun was supplied with Ar gas lOsccm and O gas 20 sccm.
- FIG. 5 is a cross-sectional view showing a state of film formation on a third substrate in the case where the film is formed.
- FIG. 13 A third substrate in the case where O gas of 30 sccm is supplied to the ion gun in Embodiment 4.
- FIG. 3 is a cross-sectional view showing a film formation state on a substrate.
- FIG. 14 is a diagram showing the transmittance in the film formation state shown in FIG. 11 in the fourth embodiment.
- FIG. 15 is a diagram showing the transmittance in the film formation state shown in FIG. 12 in Embodiment 4.
- FIG. 16 is a diagram showing the transmittance in the film formation state shown in FIG. 13 in Embodiment 4.
- FIG. 1 is a conceptual plan view showing a film forming apparatus 1 according to the present embodiment.
- This film forming apparatus 1 is a carousel type sputter film forming apparatus, and is provided at the center of a vacuum chamber 2.
- a cylindrical rotary drum 3 is installed rotatably around a center.
- the substrate 4 is held on the outer peripheral surface of the rotary drum 3 such that the surface of the substrate 4 (surface on which the film is to be formed) faces the open side.
- each target 22, 23 is integrally formed with a sputter cathode 24, 25, respectively, and each cathode 24, 25 is connected to an external AC power source (not shown).
- deposition prevention plates 26 and 27 are provided near the Si target 22 and the Ta target 23 so as to isolate the space facing the rotating drum 3.
- Sputtering gas inlets 28 and 29 are provided between the Si targets 22 and 22 and the Ta targets 23 and 23, respectively.
- an ECR reaction is performed in which a metal film formed by the targets 22 and 23 is reacted with a reaction gas (O in the present embodiment) by plasma.
- reaction chamber 30 (reaction means) is provided.
- a reaction gas inlet 31 is provided in the vicinity of the ECR reaction chamber 30, and a conductance valve 33 is attached to an inlet pipe 32 connected to the reaction gas inlet 31!
- an ion gun 11 for irradiating an ion beam is provided on one side of the vacuum chamber 2 facing the Si target 22, an ion gun 11 for irradiating an ion beam is provided.
- the ion gun 11 is disposed so as to face the substrate 4 that rotates with the rotating drum 3, and the surface of the substrate 4 is irradiated with an ion beam from the ion gun 11 almost vertically.
- An ion gun gas inlet 12 is provided near the ion gun 11 in the vacuum chamber 2, and a conductance valve 14 is provided in an inlet pipe 13 connected to the ion gun gas inlet 12.
- the ion gun 11 in the present embodiment has a configuration as shown in FIG. That is, a leakage magnetic field of the N-S pole is generated at both ends of the opening of the iron yoke l ib incorporating the permanent magnet 11a, and the donut-shaped anode electrode 11c disposed in the vicinity thereof is added by the accelerating voltage power supply l id.
- the voltage is applied, plasma is generated in the stray magnetic field region.
- 0+ ions and Ar + ions are accelerated by repelling the positive anode electrode 11c, and the substrate 4 is irradiated with a positive force.
- the linear ion gun 11 having a linear loop opening as described above is used.
- the inside of the vacuum chamber 2 was evacuated to 10 -3 Pa, Ar gas was introduced at 30 sccm from the sputter gas inlets 28 and 29, and O gas was introduced at 100 sccm from the reaction gas inlet 31.
- the pressure in the vicinity of 2 and 23 is 0.3 Pa, and the pressure in the oxidation chamber (other space) is 0.2 Pa.
- the rotating drum 3 is rotated at 200 rpm, and lkW is applied to the microwave power supply of the ECR reaction chamber 30 to generate oxidizing plasma.
- 110 W (1, 400 V-0.08 A) is applied to the ion gun 11 to generate an ion beam.
- AC 5 kW is applied to the sputtering cathode 24, and sputtering is performed until a SiO film having a predetermined thickness is formed.
- FIG. 3 shows the surface roughness (center line average roughness Ra) of the film when the ion gun 11 is operated and when it is not operated. It should be noted that FIG. 3
- SiO / TiO film is added to the SiO / TiO film and SiO ZNbO film (30 layers each).
- the surface roughness when the ion gun 11 is operated is smaller than that when the ion gun 11 is not operated.
- FIG. 4 shows the optical characteristics of the optical multilayer film measured by a spectrophotometer, that is, the transmittance for light having a wavelength of 400 to 500 nm.
- the transmission force when the ion gun 11 is activated is higher than that when the ion gun 11 is not activated, and a value (transmittance) closer to the design value can be obtained. Understand. In other words, by irradiating the ion beam, the optical loss force that increases the transmittance and the film is formed. Was done.
- the surface roughness of the film is small and the transmittance is high because the projections that form the film roughness are etched by irradiating the ion beam. This is because the surface roughness is reduced and the surface roughness is reduced, so that the surface scattering of light is reduced and the transmittance is increased.
- plasma is emitted around the outer periphery of the ion beam from the ion gun 11, and this plasma together with the plasma generated by the ECR reaction chamber 30 contributes to the oxidation reaction of the metal film.
- the film formation, the reaction promotion and etching by the ion gun 11 and the etching, and the oxidation reaction in the ECR reaction chamber 30 are sequentially and repeatedly performed.
- the ion energy of the ion beam by the ion gun 11 may have an energy distribution mainly in the range of 500 eV or more and 3 or less eO / V. Desired! / ,. This is because if the energy is less than 500 eV, the etching effect cannot be obtained, and if it is larger than 3, OOOeV, and if the energy is mainly, the film is etched too much, and the film formation rate is reduced.
- the gas for forming the ion beam O having a high oxidation reaction promoting property is used.
- the gas for supplying oxygen ions such as O 2, N 2 O, CO 2, and H 2 O is used.
- a reactive gas containing gas may be used.
- a nitride film is formed, N, NH, etc.
- Any reactive gas including a nitriding gas that supplies nitrogen ions, may be used.
- the substrate 4 is of a carousel type in which the substrate 4 is held on the outer peripheral surface of the rotating drum 3, but the substrate 4 may be held on a rotating disk.
- a flat disk-shaped rotating disk that rotates around the center may be used as the holding member, and the substrate 4 may be held on the surface of the rotating disk such that the surface of the substrate 4 faces the open side.
- sputter cathodes 24 and 25 sputtering means
- one ion gun 11 and ECR reaction chamber 30 are provided.
- the number to be provided may be changed according to the size and size.
- the film is formed by changing the acceleration voltage applied to the ion gun 11.
- the ion gun 11 is applied with a caloric fast voltage of OV (not operated), 700 V, 1,400 V, and 2,800 V to form a film, an oxidation reaction in the ECR reaction chamber 30, and a reaction promotion and etching by the ion gun 11. Were repeated to form an optical multilayer film (23 layers).
- Fig. 5 shows the light absorptance per layer of the film formed by each accelerating voltage and the surface roughness after lamination of 23 layers.
- the light absorption was measured at a wavelength of 400 nm.
- the energy actually obtained with respect to the acceleration voltage applied to the ion gun 11 has a gentle energy distribution (distribution like a normal distribution) around the acceleration voltage! The part with a large amount of energy was almost equal to the accelerating voltage and was powerful.
- the light absorption rate is 0.3%
- the ion beam having an absorptivity of S 0.3% or lower improves the oxidation reactivity of the film (the reaction is promoted).
- the accelerating voltage exceeds 1,400 V
- the absorption rate tends to increase. This is because in the region where the incident energy is low to some extent, the O-ions enter the film with energy by the acceleration voltage, and the reactivity on the film surface is improved. It is considered that the higher the value of), the higher the 0-ions accelerated than the binding energy of oxygen, which takes oxygen from the outermost surface of the already formed dielectric film.
- the acceleration voltage applied to the ion gun 11 should be about 500V to 3, OOOV.
- FIG. 6 is a conceptual plan view showing a film forming apparatus 51 according to the present embodiment.
- Embodiment 1 The same components as those of the film forming apparatus 1 according to the first embodiment are denoted by the same reference numerals.
- a Ni target 5 is disposed so as to face the substrate 4 that rotates with the rotating drum 3.
- the Ni target 5 is a plate material having a width of 135 mm, a length of 400 mm, and a thickness of 3 mm, and is integrally formed with the sputter cathode 7 via a magnetic circuit 6.
- a sputtering gas inlet 8 is provided near the Ni target 5 in the vacuum chamber 2, and a conductance valve 10 is provided in an inlet pipe 9 connected to the sputtering gas inlet 8.
- An ion gun 11 for irradiating an ion beam is provided at a position where the Ni target 5 is rotated by 90 degrees around the rotating drum 3.
- the ion gun 11 is disposed so as to face the substrate 4 rotating with the rotary drum 3, and the ion beam from the ion gun 11 is irradiated on the surface of the substrate 4 almost vertically.
- An ion gun gas inlet 12 is provided in the vicinity of the ion gun 11 in the vacuum chamber 2, and a conductance valve 14 is provided in an inlet pipe 13 connected to the ion gun gas inlet 12.
- the vacuum chamber 2 was evacuated to 10 _3 Pa, the Ar gas from the sputtering gas introduction port 8 is introduced 10 Osccm, the pressure in the vacuum chamber 2 and 0. 3 Pa.
- Ar gas is introduced at 25 sccm from the ion gun gas inlet 12 and the rotating drum 3 is rotated at 20 rpm. In this state, power of 5 kW is applied to the sputtering cathode 7 to perform sputtering.
- the substrate 4 has a relatively small aspect ratio as shown in FIGS. 7 and 9, but has a relatively small aspect ratio 4a on the surface, and the substrate 4 has a relatively small aspect ratio as shown in FIGS.
- the substrate 4-2 has large irregularities 4b on its surface.
- FIGS. 7 and 8 show the results of the film forming process without operating the ion gun 11 (without applying electric power).
- Ni film 18 when a 500 nm-thick Ni film 18 was formed on the substrate 4-2, as shown in FIG. 10, no overhang or deposition portion was formed on the projections of the unevenness 4b. Further, a Ni film 18 having a uniform thickness was formed on the side wall of the concave portion of the unevenness 4b, and a Ni film 18 having a desired thickness was formed also on the bottom surface of the concave portion. That is, the film thickness of the top of the projection and the bottom of the depression were almost the same. As described above, the Ni film 18 was formed in a uniform and desired thickness along the shape of the irregularities 4b, and good coverage was obtained.
- the reason why the implantation characteristics and the coverage are improved by operating the ion gun 11 is as follows.
- the opening of the concave portion is closed by the overhangs 15a and 16a and the deposition portion 16b, so that sputtered particles spread over the entire surface (side wall and bottom surface) of the concave portion. It is difficult to reach.
- the overhangs 15a and 16a and the deposition section 16b are irradiated with the ion beam of the ion gun 11, and these are etched (repelled and removed).
- the ion beam is also applied to other portions (the top of the convex portion, the side wall of the concave portion, etc.).
- these portions are Irradiation is more selective. That is, the irradiation is small on the side wall and the bottom surface of the concave portion.
- the irradiation is increased on the overhangs 15a and 16a and the deposition portion 16b. As a result, the overhangs 15a and 16a and the deposited portion 16b are further etched, and the side walls and the bottom surface of the concave portion remain without being relatively etched.
- the scatter particles jump into the surface of the substrate 4.
- the overhangs 15a and 16a and the deposited portion 16b have been etched, sputtered particles whose opening in the concave portion is wide can reach the side wall and the bottom surface of the concave portion.
- the overhangs 15a and 16a and the deposition portion 16b formed again by the previous sputtering are etched.
- the overhangs 15a, 16a and the deposition portion 16b are selectively etched, and the Ni film is also effectively formed on the side walls and the bottom surface of the concave portion. It is formed. As a result, a Ni film having good embedding characteristics and good coverage is formed on the substrate 4 having unevenness as described above.
- forces Ne, Kr, and Xe using Ar having a high etching effect may be used as a gas for forming an ion beam.
- the range of the beam energy of the ion beam, the method of holding the substrate 4, the number of sputtering means and the number of ion guns 11, and the like can be selected in the same manner as in the first embodiment.
- the embedding characteristics and the coverage are improved with respect to the substrate 4 having unevenness, and no comparison result is shown for the surface roughness of the film.
- the effect that the convexities forming the film roughness are etched by the ion beam to reduce the surface roughness is the same as in the first embodiment described above, and even if the oxidation reaction by the ECR reaction chamber 30 is not performed, The effect of reducing the surface roughness is obtained. Therefore, also in the present embodiment, there may be an effect that the transmittance is increased by reducing the surface roughness of the film.
- the type of gas introduced from the gas introduction port 12 for the ion gun to the substrate 4-3 having the unevenness 4 c having a relatively large aspect ratio on the surface is used. Film formation was performed by changing the amount.
- Fig. 11 introduces 30 sccm of Ar gas
- Fig. 12 introduces lOsccm of Ar gas and 20 sccm of O gas.
- FIG. 13 is a cross-sectional view of a laminated film formed by introducing O gas at 30 sccm.
- Figure 1
- FIG. 4 to 16 show the transmittance obtained by vertically scanning a light beam of 1 m in diameter on the surface of the substrate 43 shown in FIGS. 11 to 13, and FIG. 14 shows the transmittance of FIG. FIG. 15 corresponds to FIG. 12, and FIG. 16 corresponds to FIG.
- the convex portion was extremely narrow while the concave portion was extremely narrow, and a film following the shape of the substrate 43 was not formed.
- the etching effect described in the third embodiment is good, and the substrate having the steps such as the unevenness 4c is applied to the substrate.
- a film can be formed according to the shape.
- oxygen is not contained in the beam plasma (ion beam)
- the effect of accelerating the oxidation reaction of the metal film is negated, so that the film is insufficiently oxidized and light absorption is left. The rate will be low.
- a film having a good etching effect can be formed on a substrate having steps such as unevenness 4c according to its shape. Since the beam plasma contains oxygen, it has the effect of accelerating the oxidation reaction of the metal film. Therefore, the film is sufficiently (completely) oxidized to reduce light absorption and transmit light. A film with a high rate is obtained.
- the present invention can be used as a film on a substrate of a polarization separation element used in the field of optical communication and the like.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Physical Vapour Deposition (AREA)
- Electrodes Of Semiconductors (AREA)
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2006519461A JP4922756B2 (ja) | 2004-04-09 | 2005-03-29 | 成膜装置および成膜方法 |
CN200580016473XA CN1957106B (zh) | 2004-04-09 | 2005-03-29 | 成膜装置以及成膜方法 |
US11/547,724 US20080026548A1 (en) | 2004-04-09 | 2005-03-29 | Film Forming Apparatus and Film Forming Method |
Applications Claiming Priority (4)
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JP2004-115196 | 2004-04-09 | ||
JP2004115196 | 2004-04-09 | ||
JP2004-189738 | 2004-06-28 | ||
JP2004189738 | 2004-06-28 |
Publications (1)
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WO2005098081A1 true WO2005098081A1 (ja) | 2005-10-20 |
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ID=35125106
Family Applications (1)
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PCT/JP2005/005942 WO2005098081A1 (ja) | 2004-04-09 | 2005-03-29 | 成膜装置および成膜方法 |
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Country | Link |
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US (1) | US20080026548A1 (ja) |
JP (2) | JP4922756B2 (ja) |
KR (1) | KR20060135932A (ja) |
CN (1) | CN1957106B (ja) |
TW (1) | TWI414617B (ja) |
WO (1) | WO2005098081A1 (ja) |
Cited By (7)
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JP2007291475A (ja) * | 2006-04-27 | 2007-11-08 | Ulvac Japan Ltd | 近赤外線カットフィルター及びその製造方法 |
JP2008127610A (ja) * | 2006-11-17 | 2008-06-05 | Ulvac Japan Ltd | イオンビーム源及びこれを備えた成膜装置 |
JP2008208398A (ja) * | 2007-02-23 | 2008-09-11 | Ulvac Japan Ltd | 成膜方法及び装置 |
JP2008255428A (ja) * | 2007-04-05 | 2008-10-23 | Shincron:Kk | 薄膜構造体及びその製造方法 |
JP2009007651A (ja) * | 2007-06-29 | 2009-01-15 | Nisca Corp | 減光フィルタの成膜方法、減光フィルタの製造装置及びこれを用いた減光フィルタ並びに撮像光量絞り装置 |
JP2009030109A (ja) * | 2007-07-27 | 2009-02-12 | Ulvac Japan Ltd | 成膜装置及び成膜方法 |
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JP2018152183A (ja) * | 2017-03-10 | 2018-09-27 | 株式会社日立製作所 | 微細構造体の製造方法および製造装置 |
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- 2005-03-29 CN CN200580016473XA patent/CN1957106B/zh not_active Expired - Lifetime
- 2005-03-29 KR KR1020067022927A patent/KR20060135932A/ko not_active Ceased
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JP2007291475A (ja) * | 2006-04-27 | 2007-11-08 | Ulvac Japan Ltd | 近赤外線カットフィルター及びその製造方法 |
JP2008127610A (ja) * | 2006-11-17 | 2008-06-05 | Ulvac Japan Ltd | イオンビーム源及びこれを備えた成膜装置 |
JP2008208398A (ja) * | 2007-02-23 | 2008-09-11 | Ulvac Japan Ltd | 成膜方法及び装置 |
JP2008255428A (ja) * | 2007-04-05 | 2008-10-23 | Shincron:Kk | 薄膜構造体及びその製造方法 |
JP2009007651A (ja) * | 2007-06-29 | 2009-01-15 | Nisca Corp | 減光フィルタの成膜方法、減光フィルタの製造装置及びこれを用いた減光フィルタ並びに撮像光量絞り装置 |
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WO2019003662A1 (ja) * | 2017-06-27 | 2019-01-03 | 株式会社Kokusai Electric | 半導体装置の製造方法、基板処理装置およびプログラム |
JPWO2019003662A1 (ja) * | 2017-06-27 | 2020-03-19 | 株式会社Kokusai Electric | 半導体装置の製造方法、基板処理装置およびプログラム |
Also Published As
Publication number | Publication date |
---|---|
CN1957106A (zh) | 2007-05-02 |
CN1957106B (zh) | 2011-04-13 |
JP4922756B2 (ja) | 2012-04-25 |
TW200602506A (en) | 2006-01-16 |
KR20060135932A (ko) | 2006-12-29 |
JPWO2005098081A1 (ja) | 2008-02-28 |
JP5414772B2 (ja) | 2014-02-12 |
US20080026548A1 (en) | 2008-01-31 |
JP2012067394A (ja) | 2012-04-05 |
TWI414617B (zh) | 2013-11-11 |
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