WO2017061481A1 - 材料供給装置および蒸着装置 - Google Patents
材料供給装置および蒸着装置 Download PDFInfo
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- WO2017061481A1 WO2017061481A1 PCT/JP2016/079649 JP2016079649W WO2017061481A1 WO 2017061481 A1 WO2017061481 A1 WO 2017061481A1 JP 2016079649 W JP2016079649 W JP 2016079649W WO 2017061481 A1 WO2017061481 A1 WO 2017061481A1
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- container
- vapor deposition
- melting furnace
- chamber
- material supply
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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
- C23C14/28—Vacuum evaporation by wave energy or particle radiation
- C23C14/30—Vacuum evaporation by wave energy or particle radiation by electron bombardment
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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
- C23C14/243—Crucibles for source 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
- C23C14/246—Replenishment of source 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
- C23C14/56—Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks
Definitions
- the present invention relates to a material supply apparatus for supplying an evaporation material to an evaporation source and a vapor deposition apparatus including the material supply apparatus.
- a vacuum vapor deposition apparatus that deposits vapor of an evaporation material (also referred to as a vapor deposition material) on a substrate to form, for example, a metal film on the substrate.
- evaporation material also referred to as a vapor deposition material
- Various methods such as resistance heating type, induction heating type, and electron beam heating type are known as the evaporation source of the vacuum evaporation system, and the evaporation material contained in the crucible is melted by heating or electron beam irradiation. By evaporating, vapor of the evaporation material is generated.
- Patent Document 1 discloses a technique for intermittently (every fixed time) supplying an evaporation material formed in a pellet shape to a crucible
- Patent Document 2 discloses an evaporation material formed in a wire shape.
- a technique for continuously supplying the water to the crucible is disclosed.
- the method of supplying the pelletized evaporation material to the crucible since the supply is basically intermittent, the evaporation rate is likely to fluctuate, thus making it difficult to form a metal film with a uniform film thickness. is there.
- the method of supplying the wire-like evaporation material to the crucible can suppress the fluctuation of the evaporation rate because continuous supply is possible, but it is expensive in the case of a material that is difficult to process into a wire shape. There is a problem of becoming.
- an object of the present invention is to provide a material supply device that does not require shape processing of the evaporation material and can supply the evaporation material to the vapor deposition chamber without changing the evaporation rate, and the same.
- Another object of the present invention is to provide an evaporation apparatus.
- a material supply apparatus includes a material supply chamber, a melting furnace, at least one container, a supply unit, and a transfer unit.
- the material supply chamber is installed outside the vapor deposition chamber and can be maintained in a reduced pressure atmosphere.
- the melting furnace is installed in the material supply chamber and melts the evaporation material.
- the said container accommodates the molten metal of the said evaporation material melt
- the supply unit is attached to the melting furnace and supplies the molten metal from the melting furnace to the container.
- the conveyance unit is configured to be able to convey the ingot of the evaporation material supplied from the supply unit and solidified in the container to the vapor deposition chamber together with the container.
- the material supply apparatus can transport the evaporation material to the vapor deposition chamber without opening the vapor deposition chamber to the atmosphere.
- the evaporation material transferred to the deposition chamber is an ingot that is supplied from the melting furnace to the container in a molten state and solidified in the container, and is transported to the deposition chamber together with the container, and is reheated in the deposition chamber in that state. Evaporated. Therefore, the shape processing of the evaporation material is not required, and even a relatively soft metal material can be stably supplied as the evaporation material.
- the evaporation material since the evaporation material is transported in units of containers, the evaporation material can be supplied to the vapor deposition chamber without changing the evaporation rate. Then, from the dissolution of the evaporation material, the supply into the container and the conveyance to the vapor deposition chamber are performed in a consistent vacuum. For this reason, it is possible to prevent deterioration of the evaporation material due to oxidation or adhesion of moisture, and to stably supply a high quality evaporation material to the vapor deposition chamber.
- the container may include a plurality of containers each capable of accommodating the evaporating material.
- the material supply apparatus further includes a support base including an index table capable of sequentially moving the plurality of containers to a supply position of the evaporation material by the supply unit.
- the supply unit may include a hot water discharge mechanism and a guide member.
- the tapping mechanism has a shaft member that penetrates the bottom of the melting furnace in a liquid-tight manner and has at least one recess on the outer peripheral surface, and a drive source that reciprocates the shaft member along the axial direction thereof.
- the hot water discharge mechanism is configured to be capable of discharging a predetermined amount of molten metal to the outside of the melting furnace by reciprocating along the axial direction of the shaft member.
- the guide member is provided at the bottom of the melting furnace and guides the predetermined amount of molten metal discharged to the outside of the melting furnace to the container. Thereby, the dispersion
- the hot-water supply mechanism may further include a storage part provided at the bottom of the melting furnace.
- the storage portion is configured to be able to store the predetermined amount of molten metal, and the shaft member penetrates the storage portion in a liquid-tight manner.
- the drive source includes a first position for supplying the molten metal from the melting furnace to the storage part via the concave part, and a first position for supplying the molten metal from the storage part to the guide member via the concave part.
- the shaft member is configured to be movable between two positions.
- the material supply apparatus may further include a transfer chamber that accommodates the transfer unit and can be maintained in a reduced pressure atmosphere. By allowing the material supply chamber and the transfer chamber to be shut off from the atmosphere, atmospheric contamination or contamination in the vapor deposition chamber can be prevented.
- the vapor deposition apparatus which concerns on one form of this invention comprises a vapor deposition part, a material supply chamber, a melting furnace, a 1st support part, a supply unit, and a conveyance unit.
- the said vapor deposition part has a vapor deposition chamber.
- the material supply chamber is installed outside the vapor deposition chamber and can be maintained in a reduced pressure atmosphere.
- the melting furnace is installed in the material supply chamber and melts the evaporation material.
- the first support part includes at least one container capable of accommodating a molten metal of the evaporating material melted in the melting furnace.
- the supply unit supplies the molten metal from the melting furnace to the container.
- the said conveyance unit is comprised so that the ingot of the said evaporation material supplied from the said supply unit and solidified within the said container can be conveyed with the said container from the said 1st support part to the said vapor deposition chamber.
- the vapor deposition section includes a support base that is installed in the vapor deposition chamber and supports the container, and an electron gun configured to irradiate the ingot accommodated in the container on the support base with an electron beam. Furthermore, you may have.
- the container may include a plurality of containers each capable of storing the evaporation material.
- the support table further includes an index table capable of sequentially moving the plurality of containers to the irradiation position of the electron beam from the electron gun.
- the shape processing of the evaporation material is unnecessary, and the evaporation material can be supplied to the vapor deposition chamber without changing the evaporation rate.
- FIGS. 4A and 4B are side cross-sectional views of main parts schematically showing the configurations of a melting furnace and a hot water mechanism in a steam material supply apparatus.
- FIGS. It is a sectional side view which shows roughly the structure of the supply unit of the molten material of the evaporation material in the material supply mechanism which concerns on other embodiment of this invention.
- FIG. 1 is a schematic sectional side view showing a configuration of a vapor deposition apparatus provided with a material supply apparatus according to an embodiment of the present invention.
- an X axis, a Y axis, and a Z axis are triaxial directions orthogonal to each other, the X axis and the Y axis indicate a horizontal direction, and the Z axis indicates a height direction.
- the vapor deposition device 100 includes a vapor deposition unit 10 and a material supply mechanism 20 (material supply device) that supplies an evaporation material to the vapor deposition unit 10.
- the vapor deposition unit 10 includes a vapor deposition chamber 11, a substrate holding unit 12 that holds the substrate S, a support base 13 that supports the evaporation material M, and an electron gun 14 that irradiates the evaporation material M with an electron beam E.
- the vapor deposition chamber 11 is connected to the first vacuum exhaust system 51 and is configured by a vacuum chamber that can be exhausted or maintained in a predetermined reduced pressure atmosphere.
- the substrate holding unit 12 is installed above the inside of the vapor deposition chamber 11 and is configured to be supported with the film formation surface of the substrate S facing downward.
- the substrate holding unit 12 is configured to be rotatable around the rotation axis A1 in the XY plane while holding the substrate S.
- the substrate S is typically a rectangular or circular plate substrate such as a glass substrate or a semiconductor substrate, but is not limited thereto, and a flexible substrate such as a plastic film may be used.
- the support table 13 is installed in the vicinity of the bottom of the vapor deposition chamber 11 and is configured to support the evaporation material M to be vapor deposited on the film formation surface of the substrate S together with the container H that accommodates the vaporized material M. .
- the support base 13 includes a disk-shaped index table that can rotate around the rotation axis A2 in the XY plane while supporting a plurality of containers H.
- the support base 13 has a built-in cooling mechanism through which a coolant such as cooling water can circulate, and the plurality of containers H are arranged on the same circumference on the same circumference on the upper surface of the support base 13.
- the number of containers H that can be arranged on the support base 13 is not particularly limited, and may be one, but typically is a plurality.
- the support base 13 sequentially supplies any one container H (evaporation material M) from the standby position P1 to the evaporation position P2.
- the standby position P ⁇ b> 1 is one or more positions for temporarily waiting the container H that stores the used or unused evaporation material, and the evaporation material M is placed in the container H with the material supply mechanism 20.
- the position to be handed over is included.
- the evaporation position P2 is a position where the electron beam E from the electron gun 14 is applied to the evaporation material M.
- the electron gun 14 is installed in the vicinity of the support base 13 and is configured to be able to irradiate the evaporation material M set at the evaporation position P2 with the electron beam E.
- the electron gun 14 is configured by a magnetic field deflection type (transverse) electron gun, but is not limited thereto, and other types of electron guns such as a piercing electron gun may be employed.
- the vapor deposition unit 10 includes a magnet that deflects the electron beam E toward the evaporation material M on the evaporation position P ⁇ b> 2, a substrate transfer chamber for putting the substrate S in and out of the vapor deposition chamber 11, and the vapor deposition chamber 11. It has a gas introduction line that introduces process gas into Moreover, the support stand 13 is not restricted to one, and two or more support stands 13 may be installed. In this case, a plurality of electron guns 14 may be installed corresponding to the number of support bases 13.
- the material supply mechanism 20 includes a material supply unit 30 that supplies the evaporation material M, and a conveyance unit 40 that conveys the evaporation material M from the material supply unit 30 to the vapor deposition unit 10.
- the material supply unit 30 includes a material supply chamber 31, a melting furnace 32 that melts the evaporation material, a support base 33 that supports the container H that can store the molten metal M ⁇ b> 1 of the evaporation material, and the container H from the melting furnace 32. And a supply unit 34 for supplying the molten metal M1.
- the material supply chamber 31 is installed outside the vapor deposition chamber 11 and is composed of a vacuum chamber independent of the vapor deposition chamber 11. That is, the material supply chamber 31 is connected to the second evacuation system 52, and is configured to be evacuated or maintained in a predetermined reduced pressure atmosphere.
- the melting furnace 32 is installed inside the material supply chamber 31, and has an internal space for storing a bulky evaporating material and a heater for heating and evaporating the evaporating material to a predetermined temperature, as will be described later.
- the inside of the melting furnace 32 can be evacuated to a predetermined reduced pressure atmosphere together with the material supply chamber 31, whereby the melting furnace 32 functions as a vacuum melting furnace.
- Each of the material supply chamber 31 and the melting furnace 32 has an openable / closable canopy (not shown), and a bulk evaporation material can be introduced into the internal space of the melting furnace 32 through these canopies. Configured.
- the container H can accommodate the molten metal M1 of the evaporating material melted in the melting furnace 32.
- the heat insulating material such as carbon or ceramics similar to the hearth or hearth liner used for the electron beam evaporation source is used. Consists of.
- a flange portion Fh is integrally formed on the periphery of the upper end opening of the container H, and the container H is gripped by the transport unit 42 of the transport section 40 via the flange portion Fh.
- capacitance of the container H is not specifically limited, It selects according to the specification of the evaporation material M and the vapor deposition part 10, and the container which has a capacity
- the type of metal material used as the evaporation material is not particularly limited, and various metal materials capable of electron beam evaporation are used.
- a bulk and relatively soft metal material such as tin (Sn), tantalum (Ta), aluminum (Al), lithium (Li), and indium (In) is used.
- the supply unit 34 is attached to the melting furnace 32 and configured to supply the molten metal M1 from the melting furnace 32 to the container H.
- the supply unit 34 includes a hot water discharge mechanism 35 and a guide member 36.
- the hot water supply mechanism 35 is configured to be able to discharge a predetermined amount of the molten metal M2 from the molten material M1 of the evaporation material in the melting furnace 32 to the outside of the melting furnace 32.
- the guide member 36 is provided at the bottom of the melting furnace 32 and is configured to be able to guide the predetermined amount of the molten metal M2 discharged to the outside of the melting furnace 32 to the container H.
- FIGS. 2A and 2B are side cross-sectional views of main parts schematically showing the configurations of the melting furnace 32 and the hot water discharge mechanism 35.
- the melting furnace 32 includes a furnace wall 322 containing a heater (heating wire) 321, a jacket part 324 containing a refrigerant circulation passage 323, and a lining material 325.
- the jacket portion 324 is provided to prevent the heat of the furnace wall 322 from being transmitted to the outside of the melting furnace 321, and is provided on the outer surface of the furnace wall 322.
- the lining material 325 is for reducing wettability (or affinity) between the inner surface of the furnace wall 322 and the molten metal M ⁇ b> 1 of the evaporation material, and is provided on the inner surface of the furnace wall 322.
- the lining material 325 is made of a carbon-based material such as graphite, for example.
- the hot water supply mechanism 35 includes a shaft portion 351 and a drive source 352.
- the shaft portion 351 is disposed inside the guide member 36 and is made of a cylindrical refractory metal material that penetrates the bottom of the melting furnace 32 in a liquid-tight manner.
- the inner peripheral surface of the bottom hole 326 of the melting furnace 32 through which the shaft portion 351 passes is covered with a lining material 325, and the shaft portion 351 slides in the axial direction (Z-axis direction) with respect to the surface of the lining material 325. It is inserted in a movable manner.
- the outer peripheral surface of the shaft portion 351 is provided with an annular recess 35g centered on the shaft center.
- Recess 35g has a volume that can accommodate a predetermined amount of molten metal M2. Accordingly, when the shaft portion 351 is lowered, the predetermined amount of the molten metal M2 can be discharged to the outside of the melting furnace 32 as schematically shown in FIG. 2B.
- the predetermined amount is not particularly limited, and is typically an amount smaller than the capacity of the container H, and is about 10 cc in the present embodiment.
- the melt easily reaches the entire recess 35g when the molten metal is accommodated from the melting furnace, and also when the melt is discharged from the recess 35g. Since it becomes easy to discharge the molten metal from the entire recess 35g, it becomes possible to reliably store and discharge a predetermined amount of the molten metal. Moreover, it is preferable that the cross-sectional shape of the recessed part 35g is a circular arc shape (round groove) so that the discharge property of the molten metal M2 from the recessed part 35g can be further improved.
- the concave portion 35g provided on the outer peripheral portion of the shaft portion 351 is not necessarily provided in an annular shape on the outer peripheral surface with the shaft center as a center, and at least one concave portion is formed on the outer peripheral surface of the shaft portion 351. If the volume which can accommodate a predetermined amount of molten metal can be defined, the shape or form is not particularly limited.
- the concave portion 35g may be constituted by a plurality of concave portions provided intermittently along the circumferential direction of the shaft portion 351, or may be constituted by a single partial annular groove that is discontinuous in the circumferential direction. Also good.
- the drive source 352 is for reciprocating the shaft portion 351 along its axial direction, and is constituted by, for example, a cylinder mechanism, a ball screw mechanism, or the like. As shown in FIG. 2A, the drive source 352 is between a rising position where the concave portion 35g is located inside the melting furnace 32 and a lowering position where the concave portion 35g is located outside the melting furnace 32 as shown in FIG.
- the shaft portion 351 can be moved up and down.
- the inner wall surface of the guide member 36 is preferably covered with a lining material made of the same material as the lining material 325.
- the support base 33 is installed near the bottom of the material supply chamber 31 and is configured to be able to support a plurality of containers H.
- the support base 33 includes a disk-shaped index table that can rotate around the rotation axis A3 in the XY plane while supporting a plurality of containers H.
- the support base 33 incorporates a cooling mechanism capable of circulating a coolant such as cooling water, and the plurality of containers H are arranged on the same circumference on the same circumference on the upper surface of the support base 33.
- the number of containers H that can be arranged on the support base 33 is not particularly limited, and may be one, but is typically a plurality.
- the support base 33 sequentially supplies an arbitrary one container H from the standby position P3 to the supply position P4.
- the standby position P3 is one or two or more positions for temporarily waiting for the container H before or after pouring the evaporation material M, and the evaporation material M together with the container H together with the vapor deposition unit 10. Including the delivery position.
- the supply position P4 is a position where a predetermined amount of molten metal M2 is supplied (poured) from the hot-water supply mechanism 35. In the present embodiment, as shown in FIG. 1, the position facing the outlet of the guide member 36 in the Z-axis direction.
- the material supply unit 30 further includes a sensor 37 and a controller 38.
- the sensor 37 is disposed outside a window made of a transparent plate provided in the upper part of the material supply chamber 31, and the remaining evaporation material M in the used container H transferred from the vapor deposition section 10 to the standby position P3. The amount is detected, and the detection signal is output to the controller 38. Based on the output of the sensor 37, the controller 38 determines the supply amount of the molten metal M ⁇ b> 1 supplied to the detection target container H at the supply position P ⁇ b> 4 (in this embodiment, the number of times the shaft portion 351 is moved up and down).
- the type of the sensor 37 is not particularly limited, and for example, an image sensor such as a camera or a distance measuring sensor such as a laser displacement meter is used.
- the controller 38 is typically composed of a computer incorporating a CPU, a memory, and the like, and controls the operations of the material supply unit 30 and the conveyance unit 40.
- the controller 38 may be configured as a host controller that controls the operation of the entire vapor deposition apparatus 100 including the vapor deposition unit 10.
- the transport unit 40 includes a transport chamber 41 and a transport unit 42.
- the transfer chamber 41 is disposed between the vapor deposition chamber 11 and the material supply chamber 31, and is connected to the vapor deposition chamber 11 and the material supply chamber 31 via gate valves V1 and V2, respectively.
- the transfer chamber 41 is connected to a third evacuation system 53 and is configured so that the inside can be evacuated or maintained in a predetermined reduced pressure atmosphere.
- the transfer unit 42 is installed at the bottom of the transfer chamber 41.
- the transport unit 42 includes a hand part 421 capable of scooping up the flange part Fh of the container H, and a multi-joint capable of transporting the hand part 421 in the X axis, Y axis and Z axis directions, and around the Z axis. Arm portion 422.
- the transport unit 42 is configured by, for example, a SCARA type or frog leg type transport robot.
- the vapor deposition chamber 11, the material supply chamber 31, and the transfer chamber 41 are depressurized and maintained at a predetermined pressure via the first to third vacuum exhaust systems 51 to 53.
- the gate valves V1 and V2 are closed, and each chamber is shut off atmospherically. Since the gate valves V1 and V2 are for realizing the load lock function of the transfer chamber 41, the gate valves V1 and V2 are controlled not to be opened at the same time without being described in detail in the following description. .
- the melting furnace 32 is decompressed together with the material supply chamber 31 in a state in which the bulk evaporation material M is accommodated therein, and the evaporation material M is dissolved in the decompressed atmosphere.
- a plurality of empty containers H are set on the support table 33 at the standby position P3 and the supply position P4 on the support table 33, respectively. After the evaporation material M is melted, the molten metal M1 of the evaporation material M is supplied from the melting furnace 32 to the container H on the supply position P4 via the supply unit 34.
- a predetermined amount (about 10 cc) of molten metal M2 accommodated in the recess 35g is guided by the shaft portion 351 of the hot water discharge mechanism 35 moving from the raised position shown in FIG. 2A to the lowered position shown in FIG. 2B. It is supplied to the container H via the member 36.
- the raising / lowering operation of the shaft portion 351 is repeated until the evaporation material supplied to the container H reaches the maximum filling amount. For example, if the maximum filling amount of the evaporation material supplied to the container H is 100 cc, the lifting / lowering operation of the shaft portion 351 is repeated 10 times.
- the support base 33 rotates by a predetermined angle, and the container H on the standby position P3 sequentially moves to the supply position P4, and the evaporation material M1 described above.
- Each of the hot water operations is performed.
- the container H that has been supplied with the molten metal M1 at the supply position P4 moves to the standby position P3, and the molten metal M1 in the container H is cooled on the support 33 and solidifies. Therefore, the container H holds the ingot (lumps) of the evaporation material M.
- the hand portion 421 of the transfer unit 42 enters the material supply chamber 31 from the transfer chamber 41, and the evaporated material M waiting at the standby position P ⁇ b> 3 on the support base 33 is transferred to the vapor deposition chamber 11 together with the container H that accommodates it. Thereafter, the container H that stores the evaporating material M is transported to the standby position P ⁇ b> 1 of the support 13 in the vapor deposition chamber 11.
- the transport unit 42 returns to the material supply chamber 31, holds the second container H containing the evaporation material M (ingot) waiting at the standby position P ⁇ b> 3 on the support base 33, and again returns to the inside of the vapor deposition chamber 11.
- the container H is placed at the standby position P1 on the support base 13. Thereafter, this operation is repeated until the number of containers H that can be supported by the support base 13 is reached.
- the substrate S is held by the substrate holding unit 12 with the film formation surface facing downward.
- the electron gun 14 irradiates the electron beam E from the electron gun 14 toward the evaporation material M in the container H.
- the evaporation material M irradiated with the electron beam E is remelted, and vapor (evaporation particles) M3 of the evaporation material M is generated.
- the substrate holder 12 rotates around the rotation axis A1 at a predetermined speed, and the vapor M3 is deposited on the film forming surface of the substrate S that rotates together with the substrate holder 12. Thereby, a vapor deposition film of the evaporation material M is formed on the film formation surface of the substrate S.
- the evaporation material M in the container H on the evaporation position P2 is consumed. If the remaining amount of the evaporation material M is less than or equal to a predetermined value, it is difficult to perform a stable film formation process due to fluctuations in the evaporation rate. Therefore, when the remaining amount of the evaporation material M becomes equal to or less than a predetermined value, the used evaporation material M on the evaporation position P2 and the unused evaporation material M on the standby position P1 are exchanged by the rotation of the support base 13. . Thereafter, the deposition process of the substrate S is resumed using the evaporation material M newly moved to the evaporation position P2. Note that the replacement work of the evaporation material M is typically performed when the substrate S is replaced.
- each container H is carried out from the vapor deposition chamber 11 to the material supply chamber 31 as described later. Instead, a container containing new unused evaporation material M is carried into the vapor deposition chamber 11 from the material supply chamber 31.
- the transport unit 42 transports the used evaporation material M waiting at the standby position P1 on the support base 13 to the material supply chamber 31 together with the container H that accommodates it.
- the container H transported to the standby position of the support base 33 in the material supply chamber 31 by the transport unit 42 is moved to the supply position P4 by the rotation of the support base 33 after the remaining amount of the evaporation material M is measured by the sensor 37. Is done. Instead, the container H in which the evaporation material M has been supplied up to the maximum filling amount moves to the standby position P3, and the container H is transported to the vapor deposition chamber 11 via the transport unit 42.
- the container H moved to the supply position P4 is supplied with a predetermined amount of the molten metal M1 of the evaporation material M by the hot water discharge mechanism 35 until the maximum filling amount of the container H is reached. At this time, based on the remaining amount data of the evaporating material in the container H measured by the sensor 37, the operation of the hot water discharge mechanism 35 (the number of times the shaft portion 351 is moved up and down) is determined.
- the container H that contains the used evaporation material M is newly refilled with the evaporation material M.
- the container H filled with the evaporation material M is transported to the vapor deposition chamber 11 by the transport unit 42 at a predetermined timing (when the substrate S is replaced in the vapor deposition section 10).
- the evaporation material M can be transferred to the evaporation chamber 11 without opening the evaporation chamber 11 to the atmosphere.
- the evaporation material M conveyed to the vapor deposition chamber 11 is an ingot that is supplied from the melting furnace 32 to the container H in a molten state and solidified in the container H, and is conveyed to the vapor deposition chamber 11 together with the container H. In the state, it is reheated in the vapor deposition chamber 11 and evaporated. Therefore, the shape processing of the evaporation material M is not necessary, and even a relatively soft metal material can be stably supplied as the evaporation material M.
- the evaporation material M since the evaporation material M is transported in units of containers H, the evaporation material M can be supplied to the vapor deposition chamber 11 without changing the evaporation rate. Then, since the evaporation material M is melted, supplied into the container H, and transported to the vapor deposition chamber 11 in a consistent vacuum, deterioration of the evaporation material M due to oxidation and adhesion of moisture is prevented, and high quality. It becomes possible to supply the evaporation material M to the vapor deposition chamber 11 stably.
- the support base 33 in the material supply chamber 31 includes an index table that can move the plurality of containers H to the supply position P4 in order.
- the support table 13 in the vapor deposition chamber 11 includes an index table that can sequentially move the plurality of containers H to the irradiation position of the electron beam E from the electron gun 14, so that evaporation necessary for the vapor deposition process is performed.
- the material M can be secured and the productivity can be improved.
- the hot water discharge mechanism 35 is configured to supply the molten metal of the evaporating material to the container H by a predetermined amount, so that variation in the supply amount of the evaporating material M for each container H can be suppressed. Therefore, it is possible to prevent variations in the evaporation rate for each container due to variations in the amount of the evaporation material M.
- the transfer unit 42 is installed inside the transfer chamber 41 capable of maintaining a vacuum atmosphere separately from the vapor deposition chamber 11 and the material supply chamber 31. For this reason, the material supply chamber 31 and the transfer chamber 41 can be shut off atmospherically, and atmospheric contamination or contamination in the vapor deposition chamber 11 can be prevented.
- FIG. 3 is a side cross-sectional view schematically showing a configuration of a molten metal supply unit in a material supply mechanism according to another embodiment of the present invention.
- configurations different from those of the first embodiment will be mainly described, and configurations similar to those of the above-described embodiment will be denoted by the same reference numerals, and description thereof will be omitted or simplified.
- the supply unit 64 of the present embodiment includes a hot water discharge mechanism 65 and a guide member 66 having a hot water outlet 662.
- the hot water mechanism 65 includes a shaft portion 651, a storage portion 652, and a drive source 653.
- the storage unit 652 is provided at the bottom of the melting furnace 32 and configured to store a predetermined amount of the molten metal M1 of the evaporation material M.
- the storage portion 652 has through holes 652a and 652b through which the shaft portion 651 penetrates at the upper end portion and the lower end portion, respectively.
- the shaft portion 651 penetrates the bottom of the melting furnace 32, the guide member 66, and the storage portion 652 in a liquid-tight manner, and is configured to be slidable in the axial direction.
- the shaft portion 651 has an annular recess 65g centered on the shaft center on the outer peripheral surface thereof.
- the opening width z1 along the Z-axis direction of the recess 65g is set to be smaller than the height dimension z2 along the Z-axis direction of the reservoir 652.
- the through-hole 652b is shielded by the outer peripheral surface of the shaft portion 651 while the melting furnace 32 and the storage portion 652 communicate with each other via the recess 65g and the through-hole 652a.
- the through hole 652a is shielded by the outer peripheral surface of the shaft 651.
- the drive source 653 is configured in the same manner as in the first embodiment, and is configured to be movable up and down with respect to the bottom of the melting furnace 32, the guide member 66, and the storage unit 652.
- the drive source 653 has a first position for supplying the molten metal M1 from the melting furnace 32 to the reservoir 652 via the recess 65g as shown by a solid line in the drawing, and a recess 65g as shown by a two-dot chain line in the drawing.
- the shaft portion 651 is configured to be movable between the storage portion 652 and the second position where the molten metal M1 is supplied to the inside of the guide member 66.
- the inner wall surfaces of the storage portion 652 and the guide member 66 are covered with a lining material for reducing the affinity with the molten metal M1 in the same manner as the melting furnace 32. Thereby, since the predetermined amount of molten metal M2 discharged from the hot water mechanism 65 can be stably guided to the container H, variation in the amount of the molten metal reaching the container H can be suppressed.
- a heating source 661 capable of maintaining the guide member 66 at a predetermined temperature or higher is provided.
- a predetermined amount is transferred from the inside of the melting furnace 32 to the container H by one raising / lowering operation of the shaft portion 651 as in the first embodiment. It becomes possible to supply the molten metal with high accuracy and stability. Since the predetermined amount can be arbitrarily designed according to the internal volume of the storage unit 652, it is possible to sufficiently meet the demand for supplying a relatively large volume of molten metal to the container H at a time. .
- the evaporation source in the vapor deposition unit 10 is configured by an electron beam evaporation source has been described as an example.
- the present invention is not limited to this, and is configured by a resistance heating type or induction heating type evaporation source. Also good.
- the present invention can be applied as a supply device for the evaporation material supplied to these evaporation sources.
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Abstract
Description
上記材料供給室は、蒸着室の外部に設置され、減圧雰囲気に維持されることが可能に構成される。
上記溶解炉は、上記材料供給室に設置され、蒸発材料を溶解する。
上記容器は、上記溶解炉で溶解された上記蒸発材料の溶湯を収容する。
上記供給ユニットは、上記溶解炉に取り付けられ、上記溶解炉から上記容器へ上記溶湯を供給する。
上記搬送ユニットは、上記供給ユニットから供給され上記容器内で凝固した上記蒸発材料のインゴットを、上記容器とともに上記蒸着室へ搬送することが可能に構成される。
また、蒸着室へ搬送される蒸発材料は、溶解炉から溶湯状態で容器へ供給されて容器内で凝固したインゴットであり、容器とともに蒸着室へ搬送され、その状態で蒸着室にて再加熱されて蒸発させられる。したがって、蒸発材料の形状加工が不要となり、比較的軟らかい金属材料でも蒸発材料として安定に供給することが可能となる。
さらに、蒸発材料は容器単位で搬送されるため、蒸発レートを変動させることなく、蒸発材料を蒸着室へ供給することが可能となる。
そして、蒸発材料の溶解から、容器内への供給、蒸着室への搬送が真空一貫で行われる。このため、蒸発材料の酸化や水分の付着による劣化等が防止されて、高品質の蒸発材料を蒸着室へ安定に供給することが可能となる。
これにより、蒸着室へ供される蒸発材料を効率よく準備することができるため、蒸着室への蒸発材料の補給に要する時間の短縮を図ることができる。
上記出湯機構は、上記溶解炉の底部を液密に貫通し外周面に少なくとも一つの凹部を有する軸部材と、上記軸部材をその軸方向に沿って往復移動させる駆動源とを有する。上記出湯機構は、上記軸部材の軸方向に沿った往復移動で所定量の溶湯を上記溶解炉の外部へ排出することが可能に構成される。
上記ガイド部材は、上記溶解炉の底部に設けられ、上記溶解炉の外部へ排出された上記所定量の溶湯を上記容器へ誘導する。
これにより、容器ごとの蒸発材料の量のばらつきを抑えることができる。
材料供給室と搬送室とを雰囲気的に遮断可能とすることで、蒸着室内の雰囲気汚染あるいはコンタミネーションを防止することができる。
上記蒸着部は、蒸着室を有する。
上記材料供給室は、上記蒸着室の外部に設置され、減圧雰囲気に維持されることが可能に構成される。
上記溶解炉は、上記材料供給室に設置され、蒸発材料を溶解する。
上記第1の支持部は、上記溶解炉で溶解された上記蒸発材料の溶湯を収容することが可能な少なくとも1つの容器を含む。
上記供給ユニットは、上記溶解炉から上記容器へ上記溶湯を供給する。
上記搬送ユニットは、上記供給ユニットから供給され上記容器内で凝固した上記蒸発材料のインゴットを、上記容器とともに上記第1の支持部から上記蒸着室へ搬送することが可能に構成される。
図1は、本発明の一実施形態に係る材料供給装置を備えた蒸着装置の構成を示す概略側断面図である。なお、図においてX軸、Y軸およびZ軸は、相互に直交する3軸方向であって、X軸およびY軸は水平方向を、Z軸は高さ方向をそれぞれ示している。
図1に示すように、蒸着装置100は、蒸着部10と、蒸着部10へ蒸発材料を供給する材料供給機構20(材料供給装置)とを備える。
蒸着部10は、蒸着室11と、基板Sを保持する基板保持部12と、蒸発材料Mを支持する支持台13と、蒸発材料Mへ電子ビームEを照射する電子銃14とを有する。
材料供給部30は、材料供給室31と、蒸発材料を溶解する溶解炉32と、蒸発材料の溶湯M1を収容することが可能な容器Hを支持する支持台33と、溶解炉32から容器Hへ溶湯M1を供給する供給ユニット34とを有する。
搬送部40は、搬送室41と、搬送ユニット42とを有する。
次に、以上のように構成される蒸着装置100の典型的な動作について説明する。
材料供給部30において、溶解炉32は、内部にバルク状の蒸発材料Mを収容した状態で、材料供給室31とともに減圧されており、その減圧雰囲気内で、蒸発材料Mが溶解される。支持台33上には、複数の空の容器Hが支持台33上の待機位置P3および供給位置P4にそれぞれセットされる。蒸発材料Mの溶解後、供給位置P4上の容器Hには、供給ユニット34を介して溶解炉32から蒸発材料Mの溶湯M1が供給される。
蒸着室11においては、基板保持部12に基板Sが成膜面を下向きにして保持されている。蒸発材料Mを収容した容器Hが蒸発位置P2へ移動した後、電子銃14から電子ビームEが当該容器H内の蒸発材料Mへ向けて照射される。電子ビームEが照射された蒸発材料Mは再溶融し、蒸発材料Mの蒸気(蒸発粒子)M3が生成される。基板保持部12は回転軸A1のまわりに所定速度で回転し、蒸気M3は、基板保持部12とともに回転する基板Sの成膜面に堆積する。これにより、基板Sの成膜面に蒸発材料Mの蒸着膜が形成される。
支持台13上の蒸発材料Mがすべて使用済になると、あるいは未使用の蒸発材料Mの数が所定以下になると、後述するように、各容器Hが蒸着室11から材料供給室31へ搬出され、代わりに、未使用の新しい蒸発材料Mを収容する容器が材料供給室31から蒸着室11へ搬入される。
また、蒸着室11へ搬送される蒸発材料Mは、溶解炉32から溶湯状態で容器Hへ供給され、かつ当該容器H内で凝固したインゴットであり、容器Hとともに蒸着室11へ搬送され、その状態で蒸着室11にて再加熱されて蒸発させられる。したがって、蒸発材料Mの形状加工が不要となり、比較的軟らかい金属材料でも蒸発材料Mとして安定に供給することが可能となる。
さらに、蒸発材料Mは容器H単位で搬送されるため、蒸発レートを変動させることなく、蒸発材料Mを蒸着室11へ供給することが可能となる。
そして、蒸発材料Mの溶解から、容器H内への供給、蒸着室11への搬送が真空一貫で行われるため、蒸発材料Mの酸化や水分の付着による劣化等が防止されて、高品質の蒸発材料Mを蒸着室11へ安定に供給することが可能となる。
図3は、本発明の他の実施形態に係る材料供給機構における蒸発材料の溶湯の供給ユニットの構成を概略的に示す側断面図である。
以下、第1の実施形態と異なる構成について主に説明し、上述の実施形態と同様の構成については同様の符号を付しその説明を省略または簡略化する。
11…蒸着室
13…支持台
20…材料供給機構
30…材料供給部
31…材料供給室
32…溶解炉
33…支持台
34…供給ユニット
35,65…出湯機構
36,66…ガイド部材
40…搬送部
41…搬送室
42…搬送ユニット
100…蒸着装置
H…容器
M…蒸発材料
M1,M2…溶湯
M3…蒸気
Claims (8)
- 蒸着室の外部に設置され減圧雰囲気に維持されることが可能な材料供給室と、
前記材料供給室に設置され蒸発材料を溶解する溶解炉と、
前記溶解炉で溶解された前記蒸発材料の溶湯を収容することが可能な少なくとも1つの容器と、
前記溶解炉に取り付けられ、前記溶解炉から前記容器へ前記溶湯を供給する供給ユニットと、
前記供給ユニットから供給され前記容器内で凝固した前記蒸発材料のインゴットを、前記容器とともに前記蒸着室へ搬送することが可能な搬送ユニットと
を具備する材料供給装置。 - 請求項1に記載の材料供給装置であって、
前記容器は、前記蒸発材料をそれぞれ収容することが可能な複数の容器を含み、
前記材料供給装置は、前記複数の容器を順に、前記供給ユニットによる前記蒸発材料の供給位置へ移動させることが可能なインデックステーブルを含む支持台をさらに具備する
材料供給装置。 - 請求項1又は2に記載の材料供給装置であって、
前記供給ユニットは、
前記溶解炉の底部を液密に貫通し外周面に少なくとも一つの凹部を有する軸部材と、前記軸部材をその軸方向に沿って往復移動させる駆動源とを有し、前記軸部材の軸方向に沿った往復移動で所定量の溶湯を前記溶解炉の外部へ排出することが可能に構成された出湯機構と、
前記溶解炉の底部に設けられ、前記溶解炉の外部へ排出された前記所定量の溶湯を前記容器へ誘導するガイド部材と
を有する
材料供給装置。 - 請求項3に記載の材料供給装置であって、
前記出湯機構は、
前記溶解炉の底部に設けられ、前記所定量の溶湯を貯留可能な貯留部をさらに有し、
前記軸部材は、前記貯留部を液密に貫通し、
前記駆動源は、前記凹部を介して前記溶解炉から前記貯留部へ前記溶湯を供給する第1の位置と、前記凹部を介して前記貯留部から前記ガイド部材へ前記溶湯を供給する第2の位置との間にわたって、前記軸部材を移動可能に構成される
材料供給装置。 - 請求項1~4のいずれか1つに記載の材料供給装置であって、
前記搬送ユニットを収容し減圧雰囲気に維持されることが可能な搬送室をさらに具備する
材料供給装置。 - 蒸着室を有する蒸着部と、
前記蒸着室の外部に設置され減圧雰囲気に維持されることが可能な材料供給室と、
前記材料供給室に設置され蒸発材料を溶解する溶解炉と、
前記溶解炉で溶解された前記蒸発材料の溶湯を収容することが可能な少なくとも1つの容器と、
前記溶解炉から前記容器へ前記溶湯を供給する供給ユニットと、
前記供給ユニットから供給され前記容器内で凝固した前記蒸発材料のインゴットを、前記容器とともに前記第1の支持部から前記蒸着室へ搬送することが可能な搬送ユニットと
を具備する蒸着装置。 - 請求項6に記載の蒸着装置であって、
前記蒸着部は、
前記蒸着室に設置され前記容器を支持する支持台と、
前記支持台上の前記容器に収容された前記インゴットに電子ビームを照射することが可能な電子銃と
をさらに有する
蒸着装置。 - 請求項7に記載の蒸着装置であって、
前記容器は、前記蒸発材料をそれぞれ収容することが可能な複数の容器を含み、
前記支持台は、前記複数の容器を順に、前記電子銃からの前記電子ビームの照射位置へ移動させることが可能なインデックステーブルを含む
蒸着装置。
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JPH03173767A (ja) * | 1989-11-30 | 1991-07-29 | Mitsubishi Electric Corp | 薄膜形成装置 |
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JP2013127086A (ja) * | 2011-12-16 | 2013-06-27 | Ulvac Japan Ltd | 蒸着装置及び蒸着方法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6959680B1 (ja) * | 2020-11-13 | 2021-11-05 | 株式会社シンクロン | 成膜装置 |
WO2022102355A1 (ja) * | 2020-11-13 | 2022-05-19 | 株式会社シンクロン | 成膜装置 |
JP2022078588A (ja) * | 2020-11-13 | 2022-05-25 | 株式会社シンクロン | 成膜装置 |
JP7430961B1 (ja) | 2023-05-18 | 2024-02-14 | 株式会社シンクロン | 成膜装置及びこれに用いられる材料供給装置 |
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KR102149172B1 (ko) | 2020-08-28 |
CN108138309A (zh) | 2018-06-08 |
TWI711711B (zh) | 2020-12-01 |
TW201732061A (zh) | 2017-09-16 |
CN108138309B (zh) | 2020-08-14 |
JPWO2017061481A1 (ja) | 2018-04-05 |
KR20180048975A (ko) | 2018-05-10 |
JP6578367B2 (ja) | 2019-09-18 |
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