WO2018147122A1 - 成膜装置および成膜物の製造方法 - Google Patents
成膜装置および成膜物の製造方法 Download PDFInfo
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- WO2018147122A1 WO2018147122A1 PCT/JP2018/002837 JP2018002837W WO2018147122A1 WO 2018147122 A1 WO2018147122 A1 WO 2018147122A1 JP 2018002837 W JP2018002837 W JP 2018002837W WO 2018147122 A1 WO2018147122 A1 WO 2018147122A1
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- 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
- C23C14/505—Substrate holders for rotation of the substrates
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- 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
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- 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
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- 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
- C23C14/32—Vacuum evaporation by explosion; by evaporation and subsequent ionisation of the vapours, e.g. ion-plating
- C23C14/325—Electric arc evaporation
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- 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
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- 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
- C23C14/3464—Sputtering using more than one target
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- 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
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- 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
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- 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
- C23C14/542—Controlling the film thickness or evaporation rate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32055—Arc discharge
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- 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
- C23C14/0641—Nitrides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/26—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction characterised by the use of particular materials
Definitions
- the present invention relates to a film forming apparatus and a method for manufacturing a film-formed product.
- a hard film such as chromium nitride is formed on the outer peripheral surface of the workpiece by a film forming method such as PVD.
- the piston ring is a metal member having a shape in which a part of the ring is interrupted, and has a pair of opposed end portions facing each other across a space that is the interrupted portion.
- the piston ring is inserted into the engine cylinder while being deformed in a direction in which the outer diameter is reduced, that is, in a direction in which the opposed ends approach each other. In this use state, the force to open outward is the largest at the opposite end. That is, the opposing end portion is most strongly pressed against the inner wall of the cylinder, so that it is most easily worn when the engine is used.
- Patent Document 1 a film forming method described in Patent Document 1 is known as a film forming method in which the film thickness of the hard coating at the opposite end portion of the piston ring is made larger than the film thickness of other portions.
- This film forming method includes placing a piston ring on a rotary table, driving the rotary table by a motor to rotate and revolve the piston ring, and giving a speed command to the motor. And controlling the motor so that the rotation speed of the piston ring is slow when the joint portion of the piston ring faces the evaporation source.
- the rotation speed of the piston ring when the opposite end portion of the piston ring faces the evaporation source is set slower than the rotation speed when the portion other than the end portion faces the evaporation source so that the hard end at the end portion is hard.
- the thickness of the coating can be made larger than the thickness of the hard coating at other sites.
- An object of the present invention is to provide a film forming apparatus capable of accurately controlling the film thickness distribution in the circumferential direction of a workpiece.
- a film forming apparatus which is a chamber and a work rotating device housed in the chamber, and holds at least one work having an outer peripheral surface on which a film is formed, and performs predetermined rotation.
- a work rotation device having at least one holding part that rotates around an axis, and an evaporation source that is attached to the inside of the chamber and has an emission surface from which particles that form a material for forming the outer peripheral surface of the work are ejected.
- a power source that provides an electrical operation output to the evaporation source for causing the particles to jump out of the exit surface, and other parts of the outer peripheral surface of the work while the work rotating device rotates the work.
- the operation output that the power supply provides to the evaporation source in a specific period in which the specific part where the thick film is to be formed is at least a part of the period facing the emission surface of the evaporation source.
- a method for manufacturing a film-formed product includes at least one holding unit that holds at least one work having an outer peripheral surface to be formed and rotates around a predetermined rotation axis.
- An evaporation source having an exit surface from which particles as a material for forming the outer peripheral surface of the workpiece are ejected, and an electrical operation output for ejecting the particles from the exit surface to the evaporation source
- a preparation step for preparing a power supply to be applied, a workpiece attachment step for attaching the workpiece to the holding portion, and the workpiece rotating device by the workpiece rotating device, and a thicker film than the other portion of the outer peripheral surface of the workpiece is formed.
- the operation output is higher than the reference output.
- FIG. 1 shows a film forming apparatus 1 according to the embodiment.
- the film forming apparatus 1 forms a film on the outer peripheral surface of the piston ring 100 by PVD, specifically arc ion plating (AIP) or sputtering, while rotating and reciprocating a plurality of piston rings 100 which are workpieces to be formed. It is a device that performs processing.
- the film forming apparatus 1 includes a chamber 2, an evaporation source including a plurality of targets 3, a plurality of arc power sources 4 that respectively supply arc currents to the plurality of targets 3, and a work that revolves a plurality of piston rings 100.
- a rotating device 5 and a control device 6 that performs current control of the arc power supply 4 are provided.
- the chamber 2 is composed of a hollow housing having a plurality of side walls 2a and a top wall and a bottom wall connected to the upper and lower edges of the plurality of side walls 2a.
- a sealed space 2b is surrounded by the plurality of side walls 2a, the top wall, and the bottom wall.
- the chamber 2 houses the piston ring 100 and the workpiece rotating device 5 in the space 2b.
- the plurality of targets 3 are attached to a pair of specific side walls 2a that are included in the plurality of side walls 2a and face each other.
- Each target 3 includes a material for forming a film on the outer peripheral surface of the piston ring 100 (for example, a material such as titanium or chromium for forming a hard film of chromium nitride or titanium nitride).
- Each target 3 has an exit surface 3a, and particles constituting the material jump out of the exit surface 3a.
- the target 3 is arranged outside the revolution orbit OB shown in FIG.
- the revolution track OB is a track on which the piston ring 100 revolves around a predetermined revolution axis S1.
- Each arc power supply 4 gives an arc current to the target 3 as an electric operation output for causing particles to jump out of the target 3.
- the arc power supply 4 has a cathode and an anode. The cathode is connected to the target 3 and the anode is connected to the chamber 2.
- the piston ring 100 that is a workpiece is a member that has a shape in which a part of an annulus is interrupted, that is, an arc having a central angle close to 360 °.
- the piston ring 100 has a pair of opposed end portions 102 and 102 that face each other across a space 101 that is a portion where a part of the annular ring is interrupted.
- a hard film is formed on the outer peripheral surface of the piston ring 100 by the film forming apparatus 1 to prevent wear.
- the outer peripheral surface of the piston ring 100 includes a specific portion on which a film thicker than other portions is to be formed. The specific portion is a portion that is most heavily worn inside the cylinder of the engine when the piston ring 100 is used in the engine, that is, the outer peripheral surface of the opposed end portions 102 and 102.
- the work rotation device 5 is configured to simultaneously move the plurality of piston rings 100 in a predetermined revolving direction S while rotating the plurality of piston rings 100 around the respective rotation axes S2 during the film forming process.
- the workpiece rotating device 5 includes a plurality of holding units 13 and a holding unit driving unit 19 as main components.
- Each of the plurality of holding portions 13 can rotate about the rotation axis S2 while holding a plurality of piston rings 100 stacked on each other.
- the holding unit driving unit 19 rotates each of the plurality of holding units 13 and revolves in the revolution direction S.
- the revolution direction S is a direction in which the plurality of holding portions 13 revolve around a revolution axis S1 extending in parallel with each of the rotation axes S2, and is different from a direction in which the rotation axis S2 extends.
- Each holding portion 13 can rotate around the rotation axis S2 while holding the plurality of piston rings 100.
- the holding portion 13 includes a pedestal portion 13a on which the plurality of stacked piston rings 100 are placed, and a column portion 13b extending along the rotation axis S2.
- the column portion 13b has, for example, a cylindrical shape, and holds the plurality of piston rings 100 stacked around the column portion 13b on the inside thereof.
- Ribs 13c are formed on the outer peripheral surface of the support column 13b.
- the rib 13c is a portion for positioning the opposed end portions 102, 102 of each piston ring 100, that is, a positioning portion.
- the rib 13c extends in a direction parallel to the rotation axis S2, and has a width that can be inserted into the space 101 sandwiched between the opposed end portions 102, 102 of each piston ring 100.
- the rib 13c is inserted into the space 101 as the piston ring 100 is fitted to the support column 13b, whereby the opposed end portions 102 and 102 of the stacked piston rings 100 are rotated on the rotation axis S2.
- the piston ring 100 is positioned so as to face a common predetermined direction with reference to.
- the holding unit driving unit 19 includes a revolving table 11 that can rotate around the revolving axis S ⁇ b> 1 together with the plurality of holding units 13, a table driving unit 12 that rotates the revolving table 11, and the plurality of holding units 13.
- a plurality of rotation gears 14 that rotate together with each other, a revolving gear 15 that is fixed to the chamber 2 and meshes with each of the plurality of rotation gears 14, and the plurality of holding portions 13 and the plurality of rotation gears 14 are connected to each other.
- the table driving unit 12 includes a motor and a speed reducer that decelerates the rotation of the output shaft of the motor and transmits it to the revolving table 11.
- the revolution gear 15 is fixed to the chamber 2 via the support base 18 at a position where the center thereof coincides with the revolution axis S1.
- the revolving table 11 has a plurality of through holes 11a for holding the plurality of holding portions 13 so as to be capable of rotating.
- the plurality of through holes 11a are arranged at equal intervals around the revolution axis S1.
- the revolution table 11 includes a disk-shaped table body and a shaft portion 16 extending downward from the lower surface of the table body along the revolution axis S1.
- the shaft portion 16 extends downward from the table main body through through holes formed in the center portions of the revolving gear 15 and the support base 18, and is connected to the output shaft of the speed reducer (not shown) of the table driving portion 12. .
- the rotational driving force output by the table drive unit 12 is transmitted to the shaft portion 16 of the revolution table 11, thereby rotating the revolution table 11 around the revolution axis S1 in the revolution direction D1 shown in FIG. .
- the plurality of holding portions 13 held on the revolution table 11 revolve around the revolution axis S1.
- the plurality of connecting shafts 17 are inserted into the plurality of through-holes 11a of the revolving table 11 so as to be rotatable in the vertical direction.
- the connecting shaft 17 has an upper end portion connected to the holding portion 13 and a lower end portion connected to the rotation gear 14.
- the plurality of holding portions 13 and the plurality of rotation gears 14 are rotatable together with the connecting shaft 17 by the portion of the revolution table 11 surrounding the through hole 11a while being positioned on the upper side and the lower side of the revolution table 11, respectively.
- the plurality of holding portions 13 and the plurality of rotation gears 14 can revolve in the revolving direction D1 around the revolving axis S1 as the revolving table 11 rotates.
- Each of the plurality of rotation gears 14 revolves around the rotation axis S2 together with the holding portion 13 connected to the rotation gear 14 by revolving while meshing with the rotation gear 15, and the rotation direction shown in FIG. It is possible to rotate to D2.
- each of the piston rings 100 held by each of the plurality of holding portions 13 has the same predetermined predetermined end portions 102 and 102 of the piston ring 100 with reference to the rotation axis S2. It is positioned to face the direction of. Therefore, when the plurality of holding portions 13 rotate, the piston rings 100 held by the holding portions 13 can rotate while facing the same direction.
- the control device 6 controls the period measurement unit 24 that measures the rotation period of the piston ring 100 held by each holding unit 13 and the current output from the arc power source 4 based on the measured period. And a control unit 23.
- the period measurement unit 24 includes a pulse counter 21 and a calculator 22.
- the pulse counter 21 counts the number of pulses transmitted from the table driving unit 12 according to the number of rotations of the motor of the table driving unit 12 of the work rotating device 5.
- the calculator 22 calculates the rotation period of each piston ring 100 from the counted number of pulses.
- the control unit 23 generates a control signal for instructing the output level of the arc current corresponding to the rotation period and inputs the control signal to the arc power supply 4, so that the current output from the arc power supply 4 can be reduced. Take control. A specific description of this current control will be given in the description of the film formation method of the piston ring 100 below.
- This method includes a preparation step, a workpiece attachment step, and a film formation step.
- the film rotating apparatus 5 having the plurality of holding units 13, the evaporation source having the target 3, and the film forming apparatus 1 having the arc power source 4 are prepared as described above.
- the plurality of piston rings 100 are attached to the plurality of holding portions 13, respectively.
- the piston ring 100 held in each of the plurality of holding portions 13 has the ribs 13c so that the opposite ends 102 and 102 of the piston ring 100 are the same on the basis of the rotation axis S2. Positioned to face a predetermined direction.
- film formation is performed on the outer peripheral surface of the piston ring 100 while the plurality of piston rings 100 rotate and revolve.
- the workpiece rotating device 5 has the plurality of piston rings 100 held by the plurality of holding portions 13 around the respective rotation axes S2.
- the plurality of piston rings 100 are revolved at a constant revolution speed around the revolution axis S1 while rotating at a constant revolution speed.
- a bias potential is applied to each piston ring 100 from a bias potential application unit (not shown) via the work rotating device 5, while the arc power source 4 supplies an arc current to the target 3 made of a material such as chromium.
- the target 3 made of a material such as chromium.
- arc discharge occurs between the target 3 and the inner surface of the chamber 2, and the material of the target 3 evaporates on the emission surface 3 a of the target 3, and high-energy particles jump out of the emission surface 3 a.
- the particles collide with the outer peripheral surface of the piston ring 100 and form a hard film such as chromium nitride on the outer peripheral surface.
- Each piston ring 100 passes in front of the emission surface 3a of the target 3 while revolving. Therefore, the hard coating can be formed over the entire circumference of the outer peripheral surface of each piston ring 100. In this way, a film-formed product is manufactured.
- the controller 23 controls the arc current so that the arc current periodically changes in accordance with the rotation period of the piston ring 100.
- This control is performed so that the arc current AR that is the operation output given to the target 3 has a current value I2 (for example, 150 A) higher than the reference current value I1 (for example, 100 A) that is the reference output only during a specific period.
- the specific period is a period in which the opposed ends 102, 102 of at least one piston ring 100 of the plurality of piston rings 100 face the emission surface 3a of the target 3, that is, as shown in FIG. It is at least a part of the period in which the specific part is facing the outside of the revolution orbit OB. That is, the specific period may be all of the period in which the facing end portions 102 and 102 face outward or a part of the period.
- the “reference output” is, for example, when the film forming apparatus 1 forms a film on the outer peripheral surface of the workpiece while rotating the workpiece such as the piston ring 100 as in the reference current value I1 described above.
- the operation output such as arc current necessary for securing a film having a preset target film thickness over the entire surface.
- the arc is set so that the arc current AR becomes a current value I2 higher than a predetermined reference current value I1 as indicated by a line L1 in FIG.
- the power supply 4 is controlled.
- the time t2 is the time at which the facing ends 102, 102 of the plurality of piston rings 100 face the outside of the revolution orbit OB.
- a large amount of particles P2 corresponding to the high current value I2 are emitted from the emitting surface 3a of the target 3 to the outer peripheral surfaces of the peripheral portions 102 and 102 of the piston ring 100 as shown in FIG. It is possible to form a partially thick film on the opposite ends 102, 102 of 100.
- the control unit 23 maintains a current value I2 that is high for a specific period T1 that is a certain period including the time t2, and the reference current value is used for periods other than the specific period T1.
- the arc power supply 4 is controlled so as to maintain I1. Therefore, the control unit 23 detects that the opposed ends 102 and 102 of the piston ring 100 are located outside the revolution orbit OB as shown in FIG. 4 at a time t1 that is out of the period T1 as shown in FIG.
- the arc power source 4 is controlled so that the arc current AR becomes the reference current value I1 at the time before turning.
- the amount of particles P1 emitted from the emission surface 3a of the target 3 corresponding to the reference current value I1 is other than the opposed end portions 102 and 102 of the piston ring 100.
- a film having a reference film thickness is formed on the outer peripheral surface of the part.
- the control unit 23 controls the arc power source 4 so that the arc current AR becomes the reference current value I1, and the reference current value I1.
- the times t3 and t4 are times when the space 101 sandwiched between the opposed ends 102 and 102 of the piston ring 100 moves inward after facing the outer side of the orbit as shown in FIGS. .
- the control unit 23 has the arc current AR having the highest current value I2 at time t2 in the time period T0, and the reference current value I1 in other periods.
- the arc power supply 4 may be controlled so that the current value gently and continuously changes like a sine curve with the intermediate value as an intermediate value.
- this control also forms a partially thick film on the outer peripheral surface of the opposed end portions 102, 102 of the piston ring 100, and the reference film thickness on the outer peripheral surface of the other portions. It is possible to form a film having a film thickness close to.
- the film thickness is controlled not by changing the rotation speed of the piston ring but by changing the arc current.
- the control unit 23 in a state where the rotation speed and the revolution speed of the piston ring 100 are constant, the opposed end portions 102 and 102 of the piston ring 100 face the emission surface 3a of the target 3.
- the arc power supply may be compared with other periods.
- the arc power supply 4 is controlled so that the arc current that the 4 gives to the target 3 becomes a high output, specifically, so as to periodically change in accordance with the rotation period of the piston ring 100. Therefore, the work rotating device 5 only has to rotate and revolve the piston ring 100 at a constant speed, and control for changing the rotation speed is unnecessary. That is, the coating on the opposed ends 102 and 102 of the piston ring 100 is partially thickened by a highly responsive electrical operation in which the arc current applied from the arc power source 4 to the target 3 is changed instead of the rotation speed operation. Therefore, the film thickness can be controlled with high reproducibility and high accuracy. Therefore, it is possible to control the film thickness distribution in the circumferential direction of the piston ring 100 with high accuracy. Further, since the change in the rotation speed and revolution speed of the piston ring 100 during the film forming process is not required, it is possible to reduce the mechanical load applied to the work rotation device 5 that rotates the piston ring 100. To.
- the present invention is not limited to an embodiment in which the rotation speed and revolution speed of the piston ring are constant, and includes one that changes at least one of the rotation speed and revolution speed.
- the ribs 13c of the holding portions 13 function as positioning portions for positioning the piston ring 100, so that the opposed end portions that are portions where a thick film should be formed on the outer peripheral surface of the piston ring 100 It is possible to turn 102 and 102 in a predetermined direction, that is, to specify the rotational phase of the facing end portions 102 and 102. Accordingly, when film formation is performed on the outer peripheral surface of the piston ring 100 while rotating the piston ring 100, the opposite end of the piston ring 100 is controlled in the control of the arc power source 4 as described above, that is, in the rotation period of the piston ring 100.
- the arc current value of the target 3 is set to a current value I2 higher than the reference current value I1 only in a specific period that is a period in which the portion including 102, 102 faces the emission surface 3a of the target 3 or a part of the period. Control is possible. This control makes it possible to form a partially thick film on the opposite ends 102, 102.
- the piston ring is controlled by controlling the arc power source 4 so that the arc current periodically changes in accordance with the rotation period of the piston ring 100. It is possible to control the film thickness distribution in the circumferential direction of 100 with higher accuracy.
- the arc power supply 4 is controlled so that the arc current periodically changes in accordance with the rotation period of the piston ring 100, but the present invention is not limited to this.
- the arc current may change at a timing different from the rotation period as long as the condition that the arc current increases when the opposed end portions 102 of the piston ring 100 face the emission surface 3a of the target 3 is satisfied.
- the film forming method of the film forming apparatus 1 and the piston ring 100 according to the above embodiment is not limited to a mode in which the piston ring 100 moves (for example, revolves) in a predetermined moving direction different from the direction in which the rotation axis S2 extends.
- the plurality of piston rings 100 rotate around the rotation axis S2 in a state where the rotational phases of the opposed end portions 102, 102 of the plurality of piston rings 100 respectively held by the plurality of holding portions 13 are matched.
- the arc current of the target 3 or the like in a specific period that is a period in which a part including at least one opposed end portion 102, 102 of the plurality of piston rings 100 faces the emission surface 3c of the target 3 or a part of the period. It is only necessary to perform control so that the operation output is higher than the reference output and higher than the operation output in a period other than the specific period. This control makes it possible to form a partially thick film on each of the opposite ends 102, 102 of the plurality of piston rings 100.
- the ribs 13 c that are the positioning parts of the plurality of holding parts 13 of the work rotating device 5 are respectively connected to the piston rings 100.
- the opposed end portion 102 on which a thick film is to be formed faces a predetermined direction with respect to the rotation axis S2 (for example, the opposed end portions 102 of all piston rings 100 face the revolution shaft 100).
- the plurality of piston rings 100 are positioned so that they face the outside of the revolution track. Thereby, it is possible to make the rotational phase of the opposing end portion 102 during rotation between the plurality of piston rings 100 exactly match.
- the arc current of the target 3 is the reference current value I1 during a specific period, which is a period in which the opposing ends 102, 102 of the plurality of piston rings 100 simultaneously face the emission surface 3a of the target 3 or a part of the period. Since the current value I2 is higher than that, a partially thick film can be formed on each of the opposed end portions 102 of the plurality of piston rings 100. Therefore, the above film formation can be performed using a conventional rotary table that revolves at a constant rotational speed.
- the target 3 is disposed outside the revolution track in which the holding unit 13 revolves around the revolution axis S ⁇ b> 1, and the control unit 23 includes the opposed end 102 of the plurality of piston rings 100. , 102 is controlled so that the arc current of the target 3 becomes a current value I2 higher than the reference current value I1 in a specific period, which is a period during which or 102 is facing the outside of the revolution orbit.
- This makes it possible to form a thick film on the opposite end portion 102 of the piston ring 100 using the target 3 disposed at an arbitrary position outside the revolution orbit OB of the holding portion 13.
- the gear ratio between the rotation gear 14 and the revolution gear 15 is preferably a value other than an integer.
- the present invention is not limited to the embodiment described above.
- the present invention includes the following modifications, for example.
- the power source that provides an electrical operation output to the evaporation source is the arc power source 4 that applies an arc current to the target 3 that is the evaporation source for AIP.
- the invention is not limited to this.
- the electrical operation output according to the present invention may be, for example, sputtering power supplied to an evaporation source for sputtering.
- the work rotating device may have at least one holding unit, and the number of the holding units is not limited.
- the work rotating device may have only a single holding unit capable of rotating.
- the control unit is in a specific period that is a period during which the specific part of the work is facing the emission surface of the target or a part of the period.
- the operation output is periodically adjusted according to the rotation period of the workpiece so that the operation output such as the arc current of the target is higher than the reference output and higher than the operation output in the period other than the specific period. It is possible to form a partially thick film at the specific part of the workpiece by controlling to change to.
- the target 3 according to the above embodiment is disposed outside the revolution orbit OB of the holding unit 13, the present invention is not limited to this.
- the target 3 may be disposed inside the revolution orbit OB of the holding portion 13.
- the target 3 as an evaporation source is disposed on the revolution axis S1, and the emission surface 3a of the target 3 is configured by a cylindrical outer peripheral surface facing radially outward over the entire circumference.
- a control unit similar to the control unit 23 shown in FIG. 8 In a specific period that is a period in which at least a part of the opposing end parts 102, 102 (may be all or part of the opposing end part 102) faces the inside of the revolution orbit OB or a part thereof, the target 3
- the operation output is adjusted to the rotation period of the piston ring 100 so that the operation output (for example, arc current) is higher than the reference output and higher than the operation output in a period other than the specific period. Control to change periodically.
- a thick film is formed by partially applying a large amount of particles P2 to the respective end portions 102 of a plurality of piston rings 100 using a single target 3 positioned inside the revolution orbit OB of the holding portion 13. Can be formed.
- the emission surface 3a of the target 3 of the film forming apparatus shown in FIGS. 7 to 8 is a surface that surrounds the entire circumference of the revolution axis S1 and faces outward so as to be separated from the revolution axis S1 in the radial direction. Therefore, when the portion including the opposed end portions 102 of the plurality of piston rings 100 faces the inside of the revolution orbit OB, the operation output of the target 3 is increased, whereby a large amount of particles P2 are extracted from the emission surface 3a. It is possible to apply to each opposite end 102 of each piston ring 100 simultaneously. In this way, it is possible to efficiently form a thick film on the opposing end portions 102 of the plurality of piston rings 100 using the single target 3.
- the gear ratio between the rotation gear and the revolution gear is preferably a value other than an integer.
- each piston ring 100 is formed while the plurality of piston rings 100 are rotated and revolved by the work rotating device 5.
- the present invention is not limited to this.
- a plurality of piston rings 100 may be caused to advance straight while filming on the outer peripheral surface of each piston ring 100. Good.
- the work rotation device 34 is orthogonal to the direction in which the rotation axis S2 extends while rotating the plurality of holding units 13 capable of rotation and the plurality of holding units 13 around the rotation axis S2 at a constant rotation speed.
- a holding unit driving unit that moves the holding units 13 straight in the straight direction D3 is provided.
- the holding unit driving unit includes a plurality of rotation gears 14 that can rotate together with the plurality of holding units 13, and the linear movement direction while supporting the plurality of holding units 13 and the plurality of rotation gears 14 in a rotatable manner.
- Each holding portion 13 is a rib as a positioning portion for positioning the pedestal portion 13a, the column portion 13b, and the opposed end portion 102 of the piston ring 100, similarly to the holding portion 13 shown in FIGS. 13c.
- the slide member 31 supports the plurality of holding portions 13 and the plurality of rotation gears 14 so as to be able to rotate.
- the slide member 31 has a plurality of through holes (not shown) for supporting the plurality of holding portions 13 and the plurality of rotation gears 14 so as to be able to rotate, like the revolving table 11 shown in FIG.
- the plurality of through holes are spaced apart from each other in the rectilinear direction D3 that is the moving direction of the holding portion 13.
- a connecting shaft (not shown) that connects the plurality of holding portions 13 and the plurality of rotation gears 14 is rotatably inserted into each through hole, whereby each holding portion 13 and each of the holding portions 13 are connected to the through holes.
- the rotation of the coupled rotation gear 14 in the rotation direction D2 is allowed.
- Each of the ribs 13c of the plurality of holding portions 13 positions the piston ring 100 so that the peripheral portions 102, 102 of the piston ring face the same predetermined direction with respect to the rotation axis S2.
- the rectilinear drive unit 32 includes means for linearly driving the slide member 31, for example, a linear motion mechanism that combines a rack and a pinion gear, an air cylinder, or a linear motor.
- the plurality of teeth 33a of the rack 33 are arranged so as to be aligned along the straight advance direction D3.
- Each of the plurality of rotation gears 14 meshes with the teeth 33 a of the rack 33. Accordingly, each rotation gear 14 rotates by receiving a rotational driving force from the teeth 33a of the rack 33 as it goes straight in the straight direction D3. Therefore, the rotation gear 14 and the holding portion 13 connected to the rotation gear 14 can rotate and move straight at the same time.
- the target 3 is disposed at a position deviated from a route in which the plurality of holding portions 13 go straight in the straight direction D3.
- the exit surface 3a of the target 3 is directed in a direction facing the holding portion 13 passing through the path.
- the other structure of the film forming apparatus shown in FIG. 9 is the same as the structure of the film forming apparatus 1 shown in FIGS. Therefore, the description of the other configuration is omitted.
- the method for forming a plurality of piston rings 100 using the film forming apparatus shown in FIG. 9 includes a process for preparing the film forming process, a work attaching process, and a film forming process.
- a plurality of piston rings 100 are attached to each of the plurality of holding portions 13 as in the film forming apparatus 1 shown in FIGS.
- the plurality of piston rings 100 are configured so that the opposite ends 102 and 102 of the piston rings 100 have the same predetermined direction (for example, the straight traveling direction C of the piston ring 100) with respect to the rotation axis S ⁇ b> 2.
- the piston ring 100 is positioned so as to face in a direction orthogonal to the direction.
- the work rotating device 34 causes the plurality of piston rings 100 to rotate at a constant speed in a direction D3 orthogonal to the rotation axis S2 while rotating at a constant rotation speed around the rotation axis S2.
- the range including the opposed ends 102 and 102 of at least one piston ring 100 among the plurality of piston rings 100 that advance straight in this way is a period in which the target 3 is facing the emission surface 3a or a part of the period.
- the control unit included in the film forming apparatus and equivalent to the control unit 23 shown in FIG. 1 has an output of the target 3 that is higher than the reference output (for example, arc current).
- the operation output is controlled so as to be periodically changed in accordance with the rotation period of the piston ring 100 so that the output is higher than the operation output in a period other than the specific period, and the outer peripheral surface of the piston ring 100 is formed. Do the membrane.
- the outer peripheral surface of the piston ring 100 is formed while the piston ring 100 rotates and moves straight in the straight direction D3.
- a period before the space 101 between the opposing ends 102, 102 of the plurality of piston rings 100 faces the emission surface 3 a of the target 3 (a period in which the space 101 faces the left side in FIG. 10).
- the control unit controls the arc power source 4 so that the arc current AR becomes the reference current value I1.
- the particle P1 corresponding to the reference current value I1 is emitted from the emission surface 3a of the target 3 and reaches a portion other than the opposed end portions 102 and 102 of each piston ring 100, and other than the opposed end portions 102 and 102.
- a film having a reference thickness is formed on the outer peripheral surface of the portion.
- the control unit controls the arc power supply 4 so that the arc current AR becomes a current value I2 higher than a predetermined reference current value I1.
- a large amount of particles P2 corresponding to the high current value I2 are emitted from the emission surface 3a of the target 3, reach the outer peripheral surface of the opposed end portion 102 of the piston ring 100, and a partially thick film on the outer peripheral surface.
- the control unit controls the arc power supply 4 so that the arc current AR becomes the reference current value I1.
- the particles P1 corresponding to the reference current value I1 are emitted from the emission surface 3a of the target 3, and a film having a reference film thickness is formed on the outer peripheral surface of the piston ring 100 other than the opposed end portions 102 and 102.
- the plurality of piston rings 100 are rotated by the revolving table 11 at a constant rotation speed, and are linearly moved in a straight direction D3 perpendicular to the direction in which the rotation axis S2 extends.
- a film By forming a film on the outer peripheral surface of each piston ring 100 that passes in front of the emission surface 3a, a partially thick film can be formed on each of the opposed end portions 102, 102 of the plurality of piston rings 100. It becomes possible. Therefore, the above-described film formation can be performed using a conventional work movement table that rotates at a constant rotation speed and goes straight at a constant speed.
- the work rotation device 34 of the film forming apparatus shown in FIGS. 9 to 13 causes the plurality of piston rings 100 to rotate and travels straight in the straight direction D3, the present invention is not limited to this.
- the plurality of piston rings 100 may be reciprocated linearly in both the straight direction D3 and the opposite direction instead of straight in the straight direction D3.
- the workpiece according to the present invention is not limited to the piston ring.
- a wide range of workpieces having an outer peripheral surface to be coated and a specific portion on which a thick film is to be formed are set on the outer peripheral surface.
- the workpiece is a cutting tool used for cutting, and the portion of the outer peripheral surface of the cutting tool that comes into contact with the cutting target that rotates at high speed (that is, the rake face) is set as a specific portion where a thick film is to be formed. May be.
- a film forming apparatus capable of accurately controlling the film thickness distribution in the circumferential direction of the workpiece.
- a film forming apparatus which is a chamber and a work rotating device housed in the chamber, and holds at least one work having an outer peripheral surface on which a film is formed, and performs predetermined rotation.
- a work rotation device having at least one holding part that rotates around an axis, and an evaporation source that is attached to the inside of the chamber and has an emission surface from which particles that form a material for forming the outer peripheral surface of the work are ejected.
- a power source that provides an electrical operation output to the evaporation source for causing the particles to jump out of the exit surface, and other parts of the outer peripheral surface of the work while the work rotating device rotates the work.
- the operation output that the power supply provides to the evaporation source in a specific period in which the specific part where the thick film is to be formed is at least a part of the period facing the emission surface of the evaporation source.
- the electric operation output that the power source gives to the evaporation source (for example, arc current in the case of an arc evaporation source, sputter evaporation source) In this case, sputtering power etc. are controlled.
- the control unit turns on the power supply so that the operation output becomes high while the specific portion on the outer peripheral surface of the workpiece where the thick film is to be formed faces the emission surface of the evaporation source. Control. Therefore, the work rotation device only needs to rotate the work at a constant speed, and control for changing the rotation speed is not necessary.
- the electric operation output given to the evaporation source from the power source is changed and the responsive electric power is high. It is possible to perform highly accurate film thickness control with high reproducibility by partially thickening a specific part of the workpiece by a typical operation. Therefore, it is possible to accurately control the film thickness distribution in the circumferential direction of the workpiece. In addition, the fact that the change in the rotation speed of the workpiece during the film forming process is not required enables a reduction in the mechanical load applied to the workpiece rotating device that rotates the workpiece.
- the “reference output” is necessary for securing a film having a preset target film thickness on the entire outer peripheral surface of the work when the film forming apparatus performs film formation on the outer peripheral surface of the work while rotating the work. This refers to the driving output.
- the film forming apparatus further includes a period measurement unit that measures a rotation period of the workpiece held by the holding unit, and the control unit is configured to periodically change the operation output according to the rotation period of the workpiece.
- the power source is controlled.
- the control unit can control the film thickness distribution in the circumferential direction of the workpiece with higher accuracy by controlling the power supply so that the operation output periodically changes in accordance with the rotation period of the workpiece. .
- the at least one workpiece includes a plurality of workpieces
- the at least one holding portion includes a plurality of holding portions that respectively hold the plurality of workpieces
- the workpiece rotating device includes the plurality of holding portions.
- a holding unit driving unit that rotates in a predetermined movement direction different from a direction in which the rotation axis extends while rotating about the rotation axis
- the control unit includes the plurality of holding unit driving units of the work rotation device.
- the evaporation source is operated in the specific period that is at least a part of a period in which at least one specific part of the plurality of workpieces faces the emission surface of the evaporation source while the holding unit is moved. It is preferable to control the operation output so that the output is higher than the reference output and higher than the operation output in a period other than the specific period. .
- the holding unit driving unit rotates the plurality of workpieces at a constant rotation speed while moving the workpieces in a predetermined movement direction at a constant movement speed, and at least one specific portion of the plurality of workpieces
- the operation output of the evaporation source is higher than the reference output in the specific period that is at least a part of the period in which the portion including the surface faces the emission surface of the evaporation source, and is higher than the operation output in a period other than the specific period.
- the workpiece rotating device is held by the plurality of holding portions, respectively.
- the operation output is controlled so that the operation output of the evaporation source is higher than the reference output and higher than the operation output in a period other than the specific period in the specific period that is at least a part. Is preferred.
- At least one specific portion of the plurality of workpieces is Increasing the operation output of the evaporation source to be higher than the reference output in the specific period, which is at least part of the period in which the part including the surface faces the emission surface of the evaporation source, is partially thick in each specific part of the plurality of workpieces. It makes it possible to form a film.
- each of the plurality of holding portions includes a positioning portion that positions the workpiece so that the specific portion faces a predetermined direction with respect to the rotation axis.
- the positioning portion positions the plurality of workpieces such that the specific portion on which the thick film is to be formed of each of the outer peripheral surfaces of the plurality of workpieces faces the same predetermined direction with respect to the rotation axis.
- the holding unit driving unit is configured to revolve around a revolution axis extending in parallel with a direction in which the rotation axis extends while rotating each of the plurality of holding units around the rotation axis.
- the control unit is configured such that the holding unit moving unit of the workpiece rotating device causes the workpiece to rotate on the rotation axis. While revolving around the revolution axis while revolving to the center, the part including the specific part of the plurality of workpieces is at least a part of the period facing the outside of the revolution track in the specific period It is preferable to control the operation output so that the operation output of the evaporation source is higher than the reference output and higher than the operation output in a period other than the specific period.
- the operation output of the evaporation source is higher than the reference output in the specific period, with at least a part of the period in which the part including the specific part of the plurality of workpieces faces the outside of the revolution track as the specific period. Controlling the power supply in this manner makes it possible to form a thick film on a specific part of the workpiece while using an evaporation source disposed at an arbitrary position outside the revolving track of the holding unit.
- the evaporation source may be disposed on the inner side of the revolution track on which the holding portion revolves around the revolution axis, and the emission surface may face the revolution track on the inner side of the revolution track.
- the control unit is configured to identify the plurality of workpieces while the holding unit driving unit of the workpiece rotating device revolves around the revolution axis while rotating the workpiece around the rotation axis.
- the operation output of the evaporation source is higher than the reference output in the specific period that is at least a part of the period in which the portion including the part faces the inside of the revolution orbit, and the output in a period other than the specific period It is preferable to control the operation output so that the output is higher than that.
- the specific period at least a part of the period in which the part including the specific part of the plurality of workpieces faces the inside of the revolution trajectory is the specific period, and the operation output of the evaporation source is higher than the reference output in the specific period.
- the workpiece rotating device is coupled to each of the plurality of holding portions, and a plurality of rotation gears that can rotate around the rotation shaft together with the holding portion, and a revolving gear that meshes with each of the rotation gears,
- the gear ratio between the rotation gear that rotates and revolves together with the holding portion and the rotation gear that is fixed to the chamber is a value other than an integer. That is, each time the plurality of workpieces revolve around the rotation axis.
- the position where the specific part of the plurality of workpieces faces the outside or inside of the revolution track causes a shift in the circumferential direction of the revolution axis. This prevents a specific part of a specific part of the plurality of works from facing an evaporation source arranged outside or inside the revolution track, and the evaporation source is arranged outside or inside the revolution track. Even if it is, it is possible to reliably obtain the same film thickness distribution in a plurality of workpieces.
- the holding unit driving unit may be configured to linearly advance each of the plurality of holding units in a direction orthogonal to a direction in which the rotation axis extends while rotating about the rotation axis.
- the above-described film formation can be performed using a conventional work movement table that rotates at a constant rotation speed and goes straight at a constant speed.
- a method for manufacturing a film-formed product includes at least one holding unit that holds at least one work having an outer peripheral surface to be formed and rotates around a predetermined rotation axis.
- An evaporation source having an exit surface from which particles as a material for forming the outer peripheral surface of the workpiece are ejected, and an electrical operation output for ejecting the particles from the exit surface to the evaporation source
- a preparation step for preparing a power supply to be applied, a workpiece attachment step for attaching the workpiece to the holding portion, and the workpiece rotating device by the workpiece rotating device, and a thicker film than the other portion of the outer peripheral surface of the workpiece is formed.
- the operation output is higher than the reference output.
- a specific portion of the outer peripheral surface of the workpiece on which a thick film is to be formed is the evaporation source.
- the operation output is controlled so that the operation output becomes high in a specific period that is at least a part of the period facing the emission surface.
- the operation output it is preferable to control the operation output so as to periodically change in accordance with the rotation period of the workpiece.
- the film thickness distribution in the circumferential direction of the workpiece can be controlled with higher accuracy.
- the workpiece rotating device rotates each of the plurality of workpieces around the rotation axis while moving in a predetermined movement direction different from a direction in which the rotation shaft extends.
- the operation output of the evaporation source is an output higher than a reference output in the specified period that is at least a part of the period in which the at least one specified part is facing the emission surface of the evaporation source, and other than the specified period It is preferable to control the operation output so that the output is higher than the operation output in the period.
- the film forming step at least one of the plurality of workpieces is rotated while the workpiece rotating device rotates around the rotation axis while matching the rotation phase of the specific portion of each of the plurality of workpieces.
- the operation output of the evaporation source is higher than a reference output in the specific period that is at least a part of the period in which the specific part faces the emission surface of the evaporation source, and the operation output in a period other than the specific period It is preferable to control the operation output so that the output is higher than that.
- each of the plurality of workpieces is individually attached to each of the plurality of holding portions so that the specific portion faces a predetermined direction with respect to the rotation axis.
- the operation output of the evaporation source is higher than a reference output in the specified period that is at least a part of the period in which at least one of the specified part is facing the emission surface of the evaporation source. It is preferable to perform film formation on the outer peripheral surface of the workpiece by controlling the operation output so that the output is higher than the operation output in the period.
- the above-described film formation can be performed using a conventional rotary table that revolves at a constant rotational speed.
- At least one specific part of the plurality of works Is an output higher than the reference output in the specific period, which is at least a part of the period facing the emission surface of the evaporation source, and higher than the operation output in a period other than the specific period
- the operation output may be controlled so that the film is formed on the outer peripheral surface of the workpiece so as to be output.
- the above-described film formation can be performed by using a conventional work movement table that rotates at a constant rotation speed and goes straight at a constant speed.
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Abstract
Description
Claims (17)
- 成膜装置であって、
チャンバと、
前記チャンバの内部に収納されたワーク回転装置であって、成膜される外周面を有する少なくとも1つのワークを保持して所定の自転軸を中心に自転させる少なくとも1つの保持部を有するワーク回転装置と、
前記チャンバの内部に取り付けられ、前記ワークの外周面を成膜するための材料となる粒子が飛び出す出射面を有する蒸発源と、
前記蒸発源から前記粒子が飛び出すための電気的な運転出力を当該蒸発源に与える電源と、
前記ワーク回転装置が前記ワークを自転させている間に、前記ワークの外周面のうち他の部分に比べて厚い皮膜が形成されるべき特定部分が前記蒸発源の出射面を向いている期間の少なくとも一部である特定期間において前記電源が前記蒸発源に与える前記運転出力が基準出力よりも高い出力であって前記特定期間以外の期間における出力よりも高い出力になるように、当該電源を制御する制御部と、を備える成膜装置。 - 前記少なくとも1つの保持部に保持される前記ワークの自転周期を測定する周期測定部をさらに備え、前記制御部は、前記運転出力を前記ワークの自転周期に合わせて周期的に変えるように前記電源を制御する、請求項1に記載の成膜装置。
- 前記少なくとも1つのワークは複数のワークを含み、前記少なくとも1つの保持部は、前記複数のワークをそれぞれ保持する複数の保持部を含み、前記ワーク回転装置は、前記複数の保持部のそれぞれを前記自転軸を中心に自転させながら当該自転軸が延びる方向と異なる所定の移動方向へ移動させる保持部駆動部をさらに有し、前記制御部は、前記ワーク回転装置の前記保持部駆動部が前記複数のワーク移動させている間、前記複数のワークのうちの少なくとも1つの前記特定部分が前記蒸発源の出射面を向いている期間の少なくとも一部である前記特定期間において前記蒸発源の運転出力が前記基準出力よりも高い出力であって前記特定期間以外の期間における運転出力よりも高い出力になるように、当該運転出力を制御する、請求項1に記載の成膜装置。
- 前記少なくとも1つのワークは複数のワークを含み、前記少なくとも1つの保持部は、前記複数のワークをそれぞれ保持する複数の保持部を含み、前記制御部は、前記ワーク回転装置が前記複数の保持部にそれぞれ保持された前記ワークの前記特定部分の回転位相を互いに合致させながら前記自転軸を中心に自転させている間、前記複数のワークのうちの少なくとも1つの特定部分が前記蒸発源の出射面を向いている期間の少なくとも一部である前記特定期間において前記蒸発源の運転出力が前記基準出力よりも高い出力であって前記特定期間以外の期間における運転出力よりも高い出力になるように、当該運転出力を制御する、請求項1に記載の成膜装置。
- 前記複数の保持部のそれぞれは、前記特定部分が前記自転軸を基準として所定の方向を向くように前記複数のワークの位置決めをする位置決め部を有する、請求項3または4に記載の成膜装置。
- 前記保持部移動部は、前記複数の保持部のそれぞれを前記自転軸を中心に自転させながら当該自転軸が延びる方向と平行に延びる公転軸を中心として公転させることが可能な構成を有する、請求項3に記載の成膜装置。
- 前記蒸発源は、前記保持部が前記公転軸を中心として公転する公転軌道の外側に配置され、前記制御部は、前記ワーク回転装置の前記保持部駆動部が前記ワークを前記自転軸を中心に自転させながら前記公転軸を回転中心として公転させている間、前記複数のワークの前記特定部分を含む範囲が前記公転軌道の外側を向いている期間の少なくとも一部である前記特定期間において前記蒸発源の運転出力が基準出力よりも高い出力であって前記特定期間以外の期間における運転出力よりも高い出力になるように、当該運転出力を制御する、請求項6に記載の成膜装置。
- 前記蒸発源は、前記保持部が前記公転軸を中心として公転する公転軌道の内側に配置され、前記出射面は、前記公転軌道の内側で当該公転軌道を向いており、前記制御部は、前記ワーク回転装置の前記保持部駆動部が前記ワークを前記自転軸を中心に自転させながら前記公転軸を中心として公転させている間、前記複数のワークの前記特定部分が前記公転軌道の内側を向いている期間の少なくとも一部である前記特定期間において前記蒸発源の運転出力が基準出力よりも高い出力であって前記特定期間以外の期間における運転出力よりも高い出力になるように、当該運転出力を制御する、請求項6に記載の成膜装置。
- 前記ワーク回転装置は、前記複数の保持部のそれぞれに連結され、当該保持部とともに前記自転軸を回転中心として自転可能な複数の自転ギアと、前記複数の自転ギアのそれぞれと噛み合う公転ギアであって、前記公転軸が当該公転ギアの中心を通るように前記チャンバの内部に固定された公転ギアと、をさらに有しており、前記自転ギアと当該公転ギアとのギア比は、整数以外の値である、請求項6に記載の成膜装置。
- 前記保持部駆動部は、前記複数の保持部のそれぞれを前記自転軸を中心に自転させながら当該自転軸が延びる方向と直交する方向へ直進させるように構成されている、請求項3に記載の成膜装置。
- 成膜物を製造する方法であって、
成膜される外周面を有する少なくとも1つのワークを保持して所定の自転軸を中心に自転させる少なくとも1つの保持部を有するワーク回転装置、前記ワークの外周面を成膜するための材料となる粒子が飛び出す出射面を有する蒸発源、および当該蒸発源に当該粒子が飛び出すための電気的な運転出力を与える電源を準備する準備工程と、
前記少なくとも1つのワークを前記保持部に取り付けるワーク取付け工程と、
前記ワーク回転装置が前記少なくとも1つのワークを自転させている間、前記電源が前記蒸発源に与える前記運転出力を、前記少なくとも1つのワークの外周面のうち皮膜を厚く形成すべき特定部分が前記蒸発源の出射面を向いている期間の少なくとも一部である特定期間において基準出力よりも高い出力であって前記特定期間以外の期間における運転出力よりも高い出力になるように制御して前記ワークの外周面の成膜を行うことにより前記ワークを前記成膜物にする成膜工程と、を含む成膜物の製造方法。 - 前記成膜工程では、前記運転出力が前記ワークの自転周期に合わせて周期的に変わるように制御される、請求項11に記載の成膜物の製造方法。
- 前記成膜工程では、前記ワーク回転装置が前記複数のワークのそれぞれを前記自転軸を中心に自転させながら当該自転軸が延びる方向と異なる所定の移動方向へ移動させている間、前記複数のワークのうちの少なくとも1つの前記特定部分が前記蒸発源の出射面を向いている期間の少なくとも一部である前記特定期間において前記蒸発源の運転出力が基準出力よりも高い出力であって前記特定期間以外の期間における運転出力よりも高い出力になるように、当該運転出力が制御される、請求項11に記載の成膜物の製造方法。
- 前記成膜工程では、前記ワーク回転装置が前記複数のワークのそれぞれの前記特定部分の回転位相を互いに合致させながら前記自転軸を中心に自転させている間、前記複数のワークのうちの少なくとも1つの前記特定部分が前記蒸発源の出射面を向いている期間の少なくとも一部である前記特定期間において前記蒸発源の運転出力が基準出力よりも高い出力であって前記特定期間以外の期間における運転出力よりも高い出力になるように当該運転出力が制御される、請求項11に記載の成膜物の製造方法。
- 前記ワーク取付け工程では、前記複数のワークのそれぞれの前記特定部分が前記自転軸を基準として所定の方向を向くように、前記複数の保持部のそれぞれに前記複数のワークが個別に取り付けられる、請求項13または14に記載の成膜物の製造方法。
- 前記成膜工程では、前記ワーク回転装置が前記ワークを前記自転軸を中心に自転させながら当該自転軸が延びる方向と平行に延びる公転軸を中心として公転させている間、前記複数のワークのうちの少なくとも1つの前記特定部分が前記蒸発源の出射面を向いている期間の少なくとも一部である前記特定期間において前記蒸発源の運転出力が基準出力よりも高い出力であって前記特定期間以外の期間における運転出力よりも高い出力になるように当該運転出力が制御されて前記ワークの外周面の成膜が行われる、請求項13に記載の成膜物の製造方法。
- 前記成膜工程では、前記ワーク回転装置が前記ワークを前記自転軸を中心に自転させながら当該自転軸と直交する方向へ直進させている間、前記複数のワークのうちの少なくとも1つの前記特定部分が前記蒸発源の出射面を向く期間の少なくとも一部である前記特定期間において前記蒸発源の運転出力が基準出力よりも高い出力であって前記特定期間以外の期間における運転出力よりも高い出力になるように当該運転出力が制御されて前記ワークの外周面の成膜が行われる、請求項13に記載の成膜物の製造方法。
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