WO2018135858A1 - Deposition source and deposition apparatus having the same - Google Patents

Deposition source and deposition apparatus having the same Download PDF

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Publication number
WO2018135858A1
WO2018135858A1 PCT/KR2018/000805 KR2018000805W WO2018135858A1 WO 2018135858 A1 WO2018135858 A1 WO 2018135858A1 KR 2018000805 W KR2018000805 W KR 2018000805W WO 2018135858 A1 WO2018135858 A1 WO 2018135858A1
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WO
WIPO (PCT)
Prior art keywords
deposition
diffusion container
deposition material
diffusion
container
Prior art date
Application number
PCT/KR2018/000805
Other languages
French (fr)
Inventor
Saeng Hyun Cho
Sung Il Ahn
Original Assignee
Applied Materials, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Applied Materials, Inc. filed Critical Applied Materials, Inc.
Priority to CN201880007893.9A priority Critical patent/CN110234788A/en
Publication of WO2018135858A1 publication Critical patent/WO2018135858A1/en

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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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14—Metallic material, boron or silicon
    • 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
    • C23C14/26—Vacuum evaporation by resistance or inductive heating of the source
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/40—Thermal treatment, e.g. annealing in the presence of a solvent vapour

Definitions

  • the present disclosure relates to a deposition source for evaporating a deposition material for forming a thin film on a substrate surface, and a deposition apparatus including the deposition source.
  • a deposition apparatus refers to an apparatus for forming a thin film on a surface of a substrate, such as a wafer for manufacturing a semiconductor device, a substrate for manufacturing an LCD, or a substrate for manufacturing an OLED through, for example, Chemical Vapor Deposition (CVD), Physical Vapor Deposition (PVD), or vapor deposition.
  • CVD Chemical Vapor Deposition
  • PVD Physical Vapor Deposition
  • a process for forming a thin film on the surface of a substrate by evaporating an organic substance, an inorganic substance, a metal, etc. in the deposition of a deposition material is frequently used.
  • a deposition apparatus for forming a thin film by evaporating a deposition material includes a deposition chamber in which a deposition target substrate is loaded and a deposition source for heating the deposition material so as to evaporate the deposition material to the substrate.
  • the deposition apparatus performs substrate processing in which the deposition material is evaporated so as to form a thin film on the substrate surface.
  • a deposition source used in the deposition apparatus is a component, which is installed inside the deposition chamber and evaporates the deposition material by heating the deposition material so as to evaporate the deposition material to a substrate.
  • a deposition source used in the deposition apparatus is a component, which is installed inside the deposition chamber and evaporates the deposition material by heating the deposition material so as to evaporate the deposition material to a substrate.
  • various structures such as those disclosed in Korean Patent Publication No. 10-2009-0015324, 10-2004-0110718, etc., may be adopted.
  • the present disclosure has been made in order to solve the problems described above, and an aspect of the present disclosure is to provide a deposition apparatus, which includes a deposition source and a diffusion container provided with a plurality of nozzles and configured to provide a diffusion space for an evaporated deposition material, so that the evaporated deposition material can be evenly diffused before being injected from the nozzles.
  • Another aspect of the present disclosure is to provide a deposition source, which is a linear source in which, in configuring the deposition source, nozzles for injecting a deposition material are arranged linearly and the nozzles are disposed to be deviated to one side from the center line of the bottom surface of the linear source so that utilization of the deposition source can be improved in terms of the arrangement of the deposition source in the deposition chamber.
  • Another aspect of the present disclosure is to provide a deposition apparatus, which includes a pair of linear deposition sources configured to evaporate a deposition material such that the deposition material is deposited on a substrate, and a plurality of nozzles located between the center lines of the pair of linear deposition sources, thereby minimizing the interval between the pair of deposition sources.
  • Still another aspect of the present disclosure is to provide a deposition apparatus, in which a heating portion for heating a deposition material of a deposition source is configured with at least two heating assemblies capable of being coupled to or separated from each other in a direction in which a plurality of nozzles is coupled such that maintenance of the deposition source can be facilitated so as to reduce maintenance costs required for the installation of the deposition apparatus by separating the heating assemblies as necessary.
  • a deposition source 200 provided inside a process chamber 100 for evaporating a deposition material so as to deposit the deposition material on a substrate S.
  • the deposition source includes: a diffusion container 210 having a predetermined length and defining therein a diffusion space in which the evaporated deposition material is diffused, at least one opening being formed in the diffusion container 210; a nozzle portion 220 coupled to the opening of the diffusion container 210 and including a plurality of nozzles disposed along a longitudinal direction of the diffusion container 210 so as to inject the deposition material diffused in the diffusion container 210; and a heating portion installed outside the diffusion container 210, and including a heater 230 configured to heat the deposition material contained in the diffusion container 210 by heating the diffusion container 210 and a heat shield portion 240 installed to surround the heater 230 so as to prevent heat generated from the heater 230 from being emitted outwards.
  • the center of plurality of nozzles is spaced apart from a longitudinal center line l of the bottom surface of the diffusion container 210, and the plurality of nozzles is disposed to face the substrate S.
  • the deposition source 200 may further include a deposition material supply portion 300 configured to accommodate the deposition material and coupled to one side of the diffusion container 210 so as to supply the deposition material to the diffusion container 210.
  • the heating portion may be configured with at least two heating assemblies which are capable of being coupled to or separated from each other in a direction in which the plurality of nozzles are coupled.
  • the heat shield portion 240 may include a reflector 242 disposed outside the heater 230 so as to reflect the heat emitted from the heater 230 toward the diffusion container 210, and a cooling portion 244 disposed outside the reflector 242.
  • the diffusion container 210 may have any one of rectangular and trapezoidal cross-sectional shapes perpendicular to a longitudinal direction thereof.
  • the diffusion container 210 may have a trapezoidal cross-sectional shape perpendicular to a longitudinal direction thereof, the diffusion container 210 having one side surface inclined with respect to a bottom surface thereof and a remaining side surface perpendicular to the bottom surface.
  • the heat shield portion 240 may have a shape corresponding to the trapezoidal cross-sectional shape of the diffusion container 210.
  • the heating portion may include a first heating assembly 250 installed on the bottom surface and the remaining side surface perpendicular to the bottom surface and a second heating assembly 260 installed on remaining two surfaces, and the first heating assembly 250 may be capable of being coupled to or separated from the second heating assembly 260 along a direction in which the plurality of nozzles is coupled to the diffusion container 210.
  • a deposition apparatus including: a process chamber 100 configured to provide a space in which a deposition material is deposited on a substrate S; and a pair of deposition sources 200 according to any one of claims 1 to 8, configured to evaporate the deposition material such that the deposition material is deposited to the substrate S.
  • the plurality of nozzles is located between center lines l of the pair of deposition sources 200, and the pair of deposition sources 200 may evaporate different deposition materials.
  • the deposition material evaporated by one of the pair of deposition sources 200 may be silver and the deposition material evaporated by the remaining one may be magnesium.
  • a deposition apparatus includes a deposition source and a diffusion container provided with a plurality of nozzles and configured to provide a diffusion space for an evaporated deposition material.
  • a deposition source and a diffusion container provided with a plurality of nozzles and configured to provide a diffusion space for an evaporated deposition material.
  • a deposition source is a linear source in which, in configuring the deposition source, nozzles for injecting a deposition material are arranged linearly and the nozzles are disposed to be deviated to one side from the center line of the bottom surface of the linear source.
  • utilization of the deposition source can be improved in terms of the arrangement of the deposition source in the deposition chamber.
  • a deposition apparatus includes a pair of linear deposition sources configured to evaporate a deposition material such that the deposition material is deposited on a substrate, and a plurality of nozzles located between the center lines of the pair of linear deposition sources.
  • the interval between the pair of deposition sources can be minimized.
  • a heating portion for heating a deposition material of a deposition source is configured with at least two heating assemblies capable of being coupled to or separated from each other in a direction in which a plurality of nozzles is coupled such that maintenance of the deposition source can be facilitated.
  • FIG. 1 is a vertical cross-sectional view of a deposition apparatus according to an embodiment of the present disclosure
  • FIG. 2 is a vertical cross-sectional view of a deposition apparatus according to another embodiment of the present disclosure
  • FIG. 3 is a vertical cross-sectional view of a deposition source of the deposition apparatus of FIG. 1;
  • FIG. 4 is a cross-sectional view taken in I-I direction of the deposition source of the deposition apparatus of FIG. 1;
  • FIG. 5 is a cross-sectional view illustrating a portion of the configuration of the deposition source of FIG. 4.
  • FIG. 1 is a vertical cross-sectional view of a deposition apparatus according to an embodiment of the present disclosure
  • FIG. 2 is a vertical cross-sectional view of a deposition apparatus according to another embodiment of the present disclosure
  • FIG. 3 is a vertical cross-sectional view of a deposition source 200 of the deposition apparatus of FIG. 1.
  • FIG. 4 is a cross-sectional view taken in I-I direction of the deposition source 200 of the deposition apparatus of FIG. 1
  • FIG. 5 is a cross-sectional view illustrating a portion of the configuration of the deposition source 200 of FIG. 4.
  • the deposition apparatus is an apparatus for depositing a deposition material on a substrate S, but may be variously configured.
  • the deposition apparatus may include a process chamber 100 configured to provide a space for depositing a deposition material on a substrate S, and a deposition source 200 installed in the process chamber 100 and configured to evaporate the deposition material such that the deposition material is deposited on the substrate S.
  • the substrate S to be processed is a substrate S that requires substrate processing by vapor deposition, such as an OLED substrate and an LCD substrate, and may be variously configured.
  • the substrate may be configured to be transferred singly or to transferred in the state of being seated on a carrier 20 or the like.
  • the process chamber 100 is a component that provides a space configured to deposit the deposition material on the substrate S, and may be variously configured.
  • the process chamber 100 may be configured with a container which defines a predetermined inner space and is provided with at least one gate, so that a substrate S can be carried into/out of the inner space therethrough.
  • the process chamber 100 may include an exhaust means in order to maintain a pressure therein at a predetermined level.
  • carry-in and carry-out of the substrate S with respect to the process chamber 100 may be performed by a robot (not illustrated), or may be performed in the state in which the substrate S is seated on a carrier 20.
  • a support portion (not illustrated) may be provided in the process chamber 100 so as to support the substrate S.
  • the carry-in and carry-out of the substrate S with respect to the process chamber 100 may be performed in the state in which the substrate S is seated on the carrier 20.
  • the carrier 20 is a component that is installed to be movable in the state in which the substrate S is seated thereon, and may have various configurations.
  • the carrier 20 may include an electrostatic chuck, which attracts and fixes the substrate S, and a power application portion (not illustrated), which applies DC power to the electrostatic chuck, and so on.
  • the electrostatic chuck is a component that attracts and fixes the substrate S by electrostatic force when the substrate S is transferred by the carrier.
  • the electrostatic chuck receives power from the power application portion provided in the carrier 20 or an external DC power source so as to generate electrostatic force.
  • the carrier 20 may transfer the substrate S in various methods, such as horizontal movement and vertical movement.
  • the process chamber 100 may be provided with a moving structure for supporting and moving the carrier 20 depending on the movement methods of the substrate S.
  • the process chamber 100 may be provided with a moving structure, which supports the carrier 20 at opposite sides thereof with respect to the moving direction of the carrier 20 such that, when the substrate S is horizontally moved, the carrier 20 is also moved in a horizontal state.
  • the substrate when the substrate S is moved vertically as illustrated in FIG. 1, the substrate may be transferred by a linear movement guide portion 410, which supports the lower portion of the carrier 20 such that the carrier 20 is linearly movable, and a magnetic force generation portion 430, which holds the vertical and linear movable state of the carrier 20 in the process chamber 100 by magnetic force in a non-contact state with a magnetic reaction member 22 provided above the carrier 20.
  • the linear movement guide portion 410 is installed in the process chamber 100 so as to be linearly movable, and may have various structures depending on the method of supporting the lower portion of the carrier 20.
  • the linear movement guide portion 410 may include a plurality of transfer rollers, which supports the lower portion of the carrier 20, and a drive motor 420 coupled to at least one of the plurality of transfer rollers so as to drive the plurality of transfer rollers.
  • the linear movement guide portion 410 may be installed such that, a rotary shaft of at least one of the plurality of transfer rollers and the drive motor 420 are coupled to each other so as to drive the plurality of transfer rollers.
  • the magnetic reaction member 22 when the magnetic reaction member 22 is formed of a material including a magnetic material, which is magnetizable in a magnetic field, the magnetic reaction member 22 may be formed in various structures and shapes.
  • the magnetic reaction member 22 may include a magnetic material, which has an excellent high temperature characteristic.
  • the magnetic reaction member 22 may be installed by being coupled to a support portion 24 protruding in one lateral direction of the carrier 20.
  • the magnetic reaction member 22 may be supported by the support 24 provided to maintain the horizontal position of the carrier 20.
  • the support portion 24 may have various structures as long as it is installed on the upper side of the carrier 20 such that the magnetic reaction member 22 can maintain the horizontal position of the carrier 20.
  • the support portion 24 may protrude in one lateral direction of the carrier 20 to be coupled with the magnetic reaction member 22.
  • the deposition source 200 is a component that is installed in the process chamber 100 and evaporates the deposition material to such that the deposition material is deposited on the substrate S.
  • the deposition source 200 may be configured to evaporate the deposition material to the substrate S, which is moving in the process chamber 100, in a fixed state, or to evaporate the deposition material while moving relative to the fixed substrate S in the process chamber 100.
  • the deposition source 200 may be formed using a direction, which is parallel to a side perpendicular to the moving direction thereof relative to the substrate S, as the longitudinal direction.
  • the deposition source 200 is a component that evaporates the deposition material including at least one of an organic material, an inorganic material, and a metallic material depending on a deposition condition, and may include a crucible in which the deposition material is contained and a heater 230, which heats the crucible.
  • the deposition source 200 is so-called a linear source, and may include: a diffusion container 210 having a predetermined length, including at least one opening, and forming a diffusion space in which an evaporated deposition material is diffused; a nozzle portion 220 coupled to the opening in the diffusion container 210 and including a plurality of nozzles disposed along the longitudinal direction of the diffusion container 210 so as to inject the deposition material diffused in the diffusion container 210; a heater 230 installed outside the diffusion container 210 so as to heat the diffusion container 210, thereby heating the deposition material contained in the diffusion container 210; and a heating portion 230 including a heat shield portion 240 installed to surround the heater 230 so as to prevent heat, which is generated from the heater 230, from being emitted to the outside.
  • the diffusion container 210 is a component that has a predetermined length, includes at least one opening formed therein, and provides a space in which the deposition material to be deposited on the substrate S is diffused, and may be variously configured.
  • the material of the diffusion container 210 is determined depending on the physical properties of the deposition material, and any material can be used as long as it can withstand a high temperature.
  • the diffusion container 210 may have various shapes such as a rectangular parallelepiped shape and a cylindrical shape, and has at least one opening formed on one side thereof for coupling with the nozzle portion 220.
  • the opening may be formed in the diffusion container 210 to be coupled with the nozzle portion 220 on the side facing the substrate S such that the deposition material evaporated in the diffusion container 210 is injected through the nozzles.
  • the nozzle portion 220 is a component that is coupled to the opening in the diffusion container 210 and is provided to inject the deposition material evaporated from the diffusion container 210.
  • the nozzle portion 220 may include a plurality of nozzles disposed along the longitudinal direction of the diffusion container 210.
  • the plurality of nozzles is disposed along the longitudinal direction of the diffusion container 210 and is configured to inject the deposition material evaporated from the diffusion container 210 such that the evaporated deposition material is deposited on the substrate S.
  • the material of the nozzle may be any one of tantalum, stainless steel, titanium, and inconel.
  • the plurality of nozzles may be arranged parallel to the side which is perpendicular to the moving direction of the substrate S with respect to the rectangular substrate S.
  • the heating portion is a component that is installed around the diffusion container 210 so as to heat and evaporate the deposition material contained in the diffusion container 210, and may be variously configured.
  • the heating portion may be installed outside the diffusion container 210 so as to heat the diffusion container 210, thereby evaporating the deposition material contained in the diffusion container 210, or to keep the evaporated deposition material at a predetermined temperature such that the evaporated deposition material is not condensed into liquid.
  • the heating portion may include the heater 230 installed outside the diffusion container 210 so as to heat the diffusion container 210, thereby heating the deposition material contained in the diffusion container 210 and the heat shield portion 240 installed to surround the heater 230 so as to prevent the heat, which is generated from the heater 230, from being emitted to the outside.
  • the heater 230 includes a heat generating member such as a heat wire so as to generate heat when power is supplied from the outside, and is installed around the diffusion container 210.
  • a heat generating member such as a heat wire so as to generate heat when power is supplied from the outside, and is installed around the diffusion container 210.
  • the heater 230 may be variously configured.
  • the heat shield portion 240 is configured to prevent the heat, which is generated from the heater 230, from being emitted to the outside, and may be variously configured.
  • the heat shield portion 240 may be provided on the entire remaining surface other the nozzle opening formed in the nozzle portion 220 of the diffusion container 210.
  • the heat shield portion 240 may include a reflector 242 disposed outside the heater 230 so as to reflect the heat emitted from the heater 230 toward the diffusion container 210, and a cooling portion 244 disposed outside the reflector 242.
  • the reflector 242 is a component that is installed outside the heat wire of the heater 230 to surround the heat wire and reflects the heat radiated from the heater 230 in order to prevent the heat from being emitted to the outside, and may be variously configured.
  • the reflector 242 may be configured with a reflective plate, which is made of a metal such as tantalum, AlN, PBN, or tungsten, but is not limited thereto.
  • the reflector 242 is not an essential component of the present disclosure.
  • the cooling portion 244 is a component that is installed outside the diffusion container 210 or outside the reflector 242 so as to prevent the heat, which is generated from the heater 230, from being emitted to the outside, thereby cooling the diffusion container 210 side to a predetermined temperature, and may be variously configured.
  • cooling portion 244 Various cooling systems such as an air cooling system or a water cooling system may be applied to the cooling portion 244.
  • the cooling portion 244 may adopt various configurations such as a cooling module, which is built in a cooling plate and through which a coolant flows so as to cool the heat generated by the heater 230.
  • the deposition source 200 may further include a deposition material accommodation portion that accommodates the deposition material and is coupled to one side of the diffusion container 210 so as to provide the deposition material to the diffusion container 210.
  • a deposition material supply portion 300 is configured to accommodate the deposition material therein and coupled to one side of the diffusion container 210 other than the one surface to which the nozzle portion of the diffusion container 210 is coupled so as to supply the deposition material to the diffusion container 210, and may be variously configured.
  • the deposition material supply portion 300 may be coupled to the lower surface of the diffusion container 210 in a vertical state as illustrated in FIGS. 1 and 3.
  • the deposition material supply portion 300 may include a heating portion, which is provided around the diffusion container 210.
  • the heating portion provided around the deposition material supply portion 300 may be integrally formed with the heating portion installed in the diffusion container 210 or may be constituted as an independent member.
  • the deposition material contained in the deposition material supply portion 300 may be evaporated by the heating portion so as to be supplied to the diffusion container 210.
  • Reference numeral 302 not described above denotes a support member, which fixes and supports the deposition material supply portion 300.
  • the deposition material is supplied to the diffusion container 210 by a separate deposition material supply portion 300 .
  • the deposition may be contained in the diffusion container 210 without a deposition material supply portion 300, and may be evaporated by the heating portion.
  • two or more deposition materials may need to be mixed and deposited on the substrate S.
  • the process chamber 100 may include two or more deposition sources, which are arranged to correspond to respective deposition materials.
  • the deposition apparatus may include a pair of deposition sources 200 for evaporating different deposition materials in the process chamber 100.
  • the deposition material evaporated by one of the pair of deposition sources 200 is silver and the deposition material evaporated by the remaining deposition source 200 may be magnesium.
  • a plurality of nozzles in the nozzle portion 220 may be located between the center lines l of the pair of deposition sources 200.
  • the plurality of nozzles in the nozzle portion 220 are located between the center lines 1 of the pair of evaporator sources 200, when assuming that a surface, which faces a portion to which the nozzle portion 220 is coupled in the diffusion container 210, is the bottom surface, the plurality of nozzles may be disposed to be spaced apart from the longitudinal center line l of the bottom surface of the diffusion container 210.
  • the distance w between the respective nozzle portions 220 may be 20 mm or more and 200 mm or less.
  • the diffusion container 210 may have any one of a rectangular shape and a trapezoidal cross-sectional shape perpendicular to the longitudinal direction of the diffusion container 210.
  • the diffusion container 210 may have a trapezoidal cross-sectional shape perpendicular to the longitudinal direction of the diffusion container 210.
  • one side surface of the diffusion container 210 is inclined with respect to the bottom surface, the other side surface of the diffusion container 210 is perpendicular to the bottom surface.
  • an opening is formed in the surface, which is opposite the bottom surface, and the nozzle portion 220 is coupled to the opening.
  • deposition sources 200 have the structure described above, the interval between the nozzles in the nozzle portion 220 between adjacent deposition sources 200 can be minimized.
  • deposition materials evaporated from respective deposition sources are sufficiently mixed with each other, so that the mixed deposition materials can be deposited on the substrate S, thereby forming a homogeneous deposition film on the substrate S.
  • the components of the deposition source 200 need to be separated from each other when maintenance is required in the deposition source 200 described in the embodiment of the present disclosure.
  • the heating portion may be configured with at least two heating assemblies that can be couple to or separated from each other in the coupling direction of the plurality of nozzles.
  • the heating portion may be configured with a first heating assembly 250 including a first heater 230a and a first heat shield portion, a second heating assembly 260 including a second heater 230b and a second heat shield portion.
  • the first heating assembly 250 may be configured as a single module including the first heater 230a and the first shield portion.
  • the first heat shield portion of the first heating assembly 250 may include a first reflector 242a and a first cooling portion 244a.
  • the second heating assembly 260 may include a single module including a second heater 230b and a second heat shield portion.
  • the second heat shield portion of the second heating assembly 260 may include a second reflector 242b and a second cooling portion 244b.
  • first heating assembly 250 and the second heating assembly 260 may be configured independently of each other, and may be connected to different power sources so as to receive power.
  • the first heating assembly 250 and the second heating assembly 260 may be formed in the longitudinal direction of the diffusion container 210 to be coupled to or separated from each other along a direction in which the nozzle portion 220 is coupled to the opening in the diffusion container 210.
  • the heating portion may have, for example, the trapezoidal shape corresponding to the shape of the trapezoidal shape of the diffusion container 210.
  • a longitudinal boundary between the first heating assembly 250 and the second heating assembly 260 may be parallel to the longitudinal direction of the diffusion container 210, when the diffusion container 210 has a tetragonal (rectangular or trapezoidal) cross-sectional shape, the boundary between the first heating assembly 250 and the second heating assembly 260 may be, but not exclusively, formed so as to form a diagonal line with respect to the cross section of the diffusion container 210.
  • the boundary between the first heating assembly 250 and the second heating assembly 260 may be formed parallel to one side of the cross section of the diffusion container 210.
  • the first heating assembly 250 may be disposed on the bottom surface of the diffusion container 210 and a side surface of the diffusion container 210 that is perpendicular to the bottom surface, and the second heating assembly 260 may be installed on the remaining two surfaces.
  • the first heating assembly 250 may be coupled to or separated from the second heating assembly 260 along a direction in which the plurality of nozzles is coupled to the diffusion container 210.
  • the first heating assembly 250 and the second heating assembly 260 may be coupled to each other according to various coupling schemes.
  • first heating assembly 250 and the second heating assembly 260 may have stepped structures 246, 246a, and 246b formed in the boundary between the first cooling portion 244a and the second cooling portion 244b such that the first heating assembly 250 and the second heating assembly 260 are coupled to each other, but the present disclosure is not limited thereto.
  • the stepped structures 246, 246a, and 246b of the first heating assembly 250 and the second heating assembly 260 may be formed to be coupled to or separated from each other in a direction in which the nozzle portion 220 and the diffusion container 210 are coupled to each other.
  • the deposition source 200 includes a plurality of heating assemblies 250 and 260, which are mutually coupled to or separated from each other in the direction in which the nozzle portion 220 and the diffusion container 210 are coupled to each other.
  • the heating assemblies 250 and 260 can be easily separated without interference with other components, so that maintenance of the inner diffusion container 210 and the nozzle portion 220 can be easily performed.
  • a gate for separating the deposition source 200 out of the process chamber 100 is also disposed on a side surface of the process chamber 100.
  • the heating assemblies 250 and 260 of the deposition source 200 are capable of being coupled to or separated from each other in the direction in which the nozzle portion 220 and the diffusion container 210 are coupled to each other, there is an advantage in that the assemblability and work convenience of the deposition source 200 can be further improved.
  • FIG. 1 illustrates the embodiment in which the substrate S is moved vertically, that is, in the erected state, when the substrate S is moved horizontally, for example, when the substrate S is moved such that the surface, which is deposited in the upper portion of the process chamber 100, faces downwards as illustrated in FIG. 2, the deposition source may be installed in the lower portion of the process chamber 100.
  • the nozzles in the nozzle portion 220 may be disposed to face the substrate S (that is the deposition materials are evaporated upward), and the deposition material supply portion 300 may be coupled to the opposite surface (lower surface) relative to the surface, to which the nozzle portion 220 is coupled, so as to supply the deposition material to the diffusion container 210.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physical Vapour Deposition (AREA)
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Abstract

A deposition source according to the present disclosure is provided inside a process chamber for evaporating a deposition material so as to deposit the deposition material on a substrate. The deposition source includes: a diffusion container having a predetermined length and defining therein a diffusion space in which the evaporated deposition material is diffused, at least one opening being formed in the diffusion container; a nozzle portion coupled to the opening of the diffusion container and including a plurality of nozzles disposed along a longitudinal direction of the diffusion container so as to inject the deposition material diffused in the diffusion container; and a heating portion installed outside the diffusion container, and including a heater configured to heat the deposition material contained in the diffusion container by heating the diffusion container and a heat shield portion installed to surround the heater so as to prevent heat generated from the heater from being emitted outwards. Assuming that a surface opposite a portion, to which the nozzle portion is coupled, in the diffusion container is a bottom surface, the plurality of nozzles is arranged linearly so as to be spaced apart from a longitudinal center line of the bottom surface of the diffusion container. Accordingly, utilization of the deposition source in terms of arrangement thereof within the deposition chamber can be enhanced, and uniformity of thin film deposition can be improved.

Description

DEPOSITION SOURCE AND DEPOSITION APPARATUS HAVING THE SAME
The present disclosure relates to a deposition source for evaporating a deposition material for forming a thin film on a substrate surface, and a deposition apparatus including the deposition source.
A deposition apparatus refers to an apparatus for forming a thin film on a surface of a substrate, such as a wafer for manufacturing a semiconductor device, a substrate for manufacturing an LCD, or a substrate for manufacturing an OLED through, for example, Chemical Vapor Deposition (CVD), Physical Vapor Deposition (PVD), or vapor deposition.
In addition, in the case of a substrate for manufacturing an OLED, a process for forming a thin film on the surface of a substrate by evaporating an organic substance, an inorganic substance, a metal, etc. in the deposition of a deposition material is frequently used.
A deposition apparatus for forming a thin film by evaporating a deposition material includes a deposition chamber in which a deposition target substrate is loaded and a deposition source for heating the deposition material so as to evaporate the deposition material to the substrate. The deposition apparatus performs substrate processing in which the deposition material is evaporated so as to form a thin film on the substrate surface.
In addition, a deposition source used in the deposition apparatus is a component, which is installed inside the deposition chamber and evaporates the deposition material by heating the deposition material so as to evaporate the deposition material to a substrate. Depending on an evaporation method, and various structures, such as those disclosed in Korean Patent Publication No. 10-2009-0015324, 10-2004-0110718, etc., may be adopted.
In particular, as substrates for manufacturing OLEDs have been enlarged according to demand for productivity and large panels, deposition apparatuses have also been enlarged. Therefore, an optimized structure, which enables an enlarged deposition apparatus to perform a deposition process for depositing a uniform thin film, is required. However, there is a problem in that it is difficult to carry out the deposition process for depositing a uniform film using an existing structure.
In addition, when two or more deposition materials are mixed or synthesized and deposited on a substrate surface, the substrate is enlarged and thus the spacing between the sources for evaporating the respective deposition materials is increased. Thus, since the mixing or synthesis of the two or more deposition materials is not smoothly performed, there is a problem in that it is difficult to form a vapor deposition film having a required physical property.
Further, in the conventional deposition apparatus, there is a problem in that it is difficult to carry out a process necessary for maintenance by separating the deposition source when maintenance is required after using the deposition apparatus.
The present disclosure has been made in order to solve the problems described above, and an aspect of the present disclosure is to provide a deposition apparatus, which includes a deposition source and a diffusion container provided with a plurality of nozzles and configured to provide a diffusion space for an evaporated deposition material, so that the evaporated deposition material can be evenly diffused before being injected from the nozzles.
Another aspect of the present disclosure is to provide a deposition source, which is a linear source in which, in configuring the deposition source, nozzles for injecting a deposition material are arranged linearly and the nozzles are disposed to be deviated to one side from the center line of the bottom surface of the linear source so that utilization of the deposition source can be improved in terms of the arrangement of the deposition source in the deposition chamber.
Another aspect of the present disclosure is to provide a deposition apparatus, which includes a pair of linear deposition sources configured to evaporate a deposition material such that the deposition material is deposited on a substrate, and a plurality of nozzles located between the center lines of the pair of linear deposition sources, thereby minimizing the interval between the pair of deposition sources.
Still another aspect of the present disclosure is to provide a deposition apparatus, in which a heating portion for heating a deposition material of a deposition source is configured with at least two heating assemblies capable of being coupled to or separated from each other in a direction in which a plurality of nozzles is coupled such that maintenance of the deposition source can be facilitated so as to reduce maintenance costs required for the installation of the deposition apparatus by separating the heating assemblies as necessary.
According to the present disclosure, there is provided a deposition source 200 provided inside a process chamber 100 for evaporating a deposition material so as to deposit the deposition material on a substrate S. The deposition source includes: a diffusion container 210 having a predetermined length and defining therein a diffusion space in which the evaporated deposition material is diffused, at least one opening being formed in the diffusion container 210; a nozzle portion 220 coupled to the opening of the diffusion container 210 and including a plurality of nozzles disposed along a longitudinal direction of the diffusion container 210 so as to inject the deposition material diffused in the diffusion container 210; and a heating portion installed outside the diffusion container 210, and including a heater 230 configured to heat the deposition material contained in the diffusion container 210 by heating the diffusion container 210 and a heat shield portion 240 installed to surround the heater 230 so as to prevent heat generated from the heater 230 from being emitted outwards. Assuming that a surface opposite a portion, to which the nozzle portion 220 is coupled, in the diffusion container 210 is a bottom surface, the center of plurality of nozzles is spaced apart from a longitudinal center line l of the bottom surface of the diffusion container 210, and the plurality of nozzles is disposed to face the substrate S.
The deposition source 200 may further include a deposition material supply portion 300 configured to accommodate the deposition material and coupled to one side of the diffusion container 210 so as to supply the deposition material to the diffusion container 210.
The heating portion may be configured with at least two heating assemblies which are capable of being coupled to or separated from each other in a direction in which the plurality of nozzles are coupled.
The heat shield portion 240 may include a reflector 242 disposed outside the heater 230 so as to reflect the heat emitted from the heater 230 toward the diffusion container 210, and a cooling portion 244 disposed outside the reflector 242.
The diffusion container 210 may have any one of rectangular and trapezoidal cross-sectional shapes perpendicular to a longitudinal direction thereof.
The diffusion container 210 may have a trapezoidal cross-sectional shape perpendicular to a longitudinal direction thereof, the diffusion container 210 having one side surface inclined with respect to a bottom surface thereof and a remaining side surface perpendicular to the bottom surface.
The heat shield portion 240 may have a shape corresponding to the trapezoidal cross-sectional shape of the diffusion container 210.
The heating portion may include a first heating assembly 250 installed on the bottom surface and the remaining side surface perpendicular to the bottom surface and a second heating assembly 260 installed on remaining two surfaces, and the first heating assembly 250 may be capable of being coupled to or separated from the second heating assembly 260 along a direction in which the plurality of nozzles is coupled to the diffusion container 210.
According to the present disclosure, there is provided a deposition apparatus including: a process chamber 100 configured to provide a space in which a deposition material is deposited on a substrate S; and a pair of deposition sources 200 according to any one of claims 1 to 8, configured to evaporate the deposition material such that the deposition material is deposited to the substrate S. The plurality of nozzles is located between center lines l of the pair of deposition sources 200, and the pair of deposition sources 200 may evaporate different deposition materials.
The deposition material evaporated by one of the pair of deposition sources 200 may be silver and the deposition material evaporated by the remaining one may be magnesium.
According to the present disclosure, a deposition apparatus includes a deposition source and a diffusion container provided with a plurality of nozzles and configured to provide a diffusion space for an evaporated deposition material. Thus, the evenness of a film can be improved by evenly diffusing the evaporated deposition material before being injected from the nozzles.
According to the present disclosure, a deposition source is a linear source in which, in configuring the deposition source, nozzles for injecting a deposition material are arranged linearly and the nozzles are disposed to be deviated to one side from the center line of the bottom surface of the linear source. Thus, utilization of the deposition source can be improved in terms of the arrangement of the deposition source in the deposition chamber.
According to the present disclosure, a deposition apparatus includes a pair of linear deposition sources configured to evaporate a deposition material such that the deposition material is deposited on a substrate, and a plurality of nozzles located between the center lines of the pair of linear deposition sources. Thus, the interval between the pair of deposition sources can be minimized.
Further, according to the present disclosure, a heating portion for heating a deposition material of a deposition source is configured with at least two heating assemblies capable of being coupled to or separated from each other in a direction in which a plurality of nozzles is coupled such that maintenance of the deposition source can be facilitated. Thus, it is possible to reduce maintenance costs required for the installation of the deposition apparatus by separating the heating assemblies as necessary.
The above and other aspects, features and advantages of the present disclosure will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a vertical cross-sectional view of a deposition apparatus according to an embodiment of the present disclosure;
FIG. 2 is a vertical cross-sectional view of a deposition apparatus according to another embodiment of the present disclosure;
FIG. 3 is a vertical cross-sectional view of a deposition source of the deposition apparatus of FIG. 1;
FIG. 4 is a cross-sectional view taken in I-I direction of the deposition source of the deposition apparatus of FIG. 1; and
FIG. 5 is a cross-sectional view illustrating a portion of the configuration of the deposition source of FIG. 4.
Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. FIG. 1 is a vertical cross-sectional view of a deposition apparatus according to an embodiment of the present disclosure, FIG. 2 is a vertical cross-sectional view of a deposition apparatus according to another embodiment of the present disclosure, and FIG. 3 is a vertical cross-sectional view of a deposition source 200 of the deposition apparatus of FIG. 1. FIG. 4 is a cross-sectional view taken in I-I direction of the deposition source 200 of the deposition apparatus of FIG. 1, and FIG. 5 is a cross-sectional view illustrating a portion of the configuration of the deposition source 200 of FIG. 4.
As illustrated in FIG. 1, the deposition apparatus according to an embodiment of the present disclosure is an apparatus for depositing a deposition material on a substrate S, but may be variously configured.
According to one embodiment, the deposition apparatus may include a process chamber 100 configured to provide a space for depositing a deposition material on a substrate S, and a deposition source 200 installed in the process chamber 100 and configured to evaporate the deposition material such that the deposition material is deposited on the substrate S.
The substrate S to be processed is a substrate S that requires substrate processing by vapor deposition, such as an OLED substrate and an LCD substrate, and may be variously configured. For example, the substrate may be configured to be transferred singly or to transferred in the state of being seated on a carrier 20 or the like.
The process chamber 100 is a component that provides a space configured to deposit the deposition material on the substrate S, and may be variously configured.
In one embodiment, the process chamber 100 may be configured with a container which defines a predetermined inner space and is provided with at least one gate, so that a substrate S can be carried into/out of the inner space therethrough.
In addition, the process chamber 100 may include an exhaust means in order to maintain a pressure therein at a predetermined level.
On the other hand, carry-in and carry-out of the substrate S with respect to the process chamber 100 may be performed by a robot (not illustrated), or may be performed in the state in which the substrate S is seated on a carrier 20.
According to one embodiment, when the carry-in and carry-out of the substrate S with respect to the process chamber 100 is performed by a robot (not illustrated), a support portion (not illustrated) may be provided in the process chamber 100 so as to support the substrate S.
According to another embodiment, the carry-in and carry-out of the substrate S with respect to the process chamber 100 may be performed in the state in which the substrate S is seated on the carrier 20.
The carrier 20 is a component that is installed to be movable in the state in which the substrate S is seated thereon, and may have various configurations.
According to one embodiment, as illustrated in FIG. 1, the carrier 20 may include an electrostatic chuck, which attracts and fixes the substrate S, and a power application portion (not illustrated), which applies DC power to the electrostatic chuck, and so on.
The electrostatic chuck is a component that attracts and fixes the substrate S by electrostatic force when the substrate S is transferred by the carrier. The electrostatic chuck receives power from the power application portion provided in the carrier 20 or an external DC power source so as to generate electrostatic force.
Meanwhile, the carrier 20 may transfer the substrate S in various methods, such as horizontal movement and vertical movement.
At this time, the process chamber 100 may be provided with a moving structure for supporting and moving the carrier 20 depending on the movement methods of the substrate S.
According to one embodiment, the process chamber 100 may be provided with a moving structure, which supports the carrier 20 at opposite sides thereof with respect to the moving direction of the carrier 20 such that, when the substrate S is horizontally moved, the carrier 20 is also moved in a horizontal state.
According to another embodiment, in the process chamber 100, when the substrate S is moved vertically as illustrated in FIG. 1, the substrate may be transferred by a linear movement guide portion 410, which supports the lower portion of the carrier 20 such that the carrier 20 is linearly movable, and a magnetic force generation portion 430, which holds the vertical and linear movable state of the carrier 20 in the process chamber 100 by magnetic force in a non-contact state with a magnetic reaction member 22 provided above the carrier 20.
The linear movement guide portion 410 is installed in the process chamber 100 so as to be linearly movable, and may have various structures depending on the method of supporting the lower portion of the carrier 20.
As an example, the linear movement guide portion 410 may include a plurality of transfer rollers, which supports the lower portion of the carrier 20, and a drive motor 420 coupled to at least one of the plurality of transfer rollers so as to drive the plurality of transfer rollers.
Specifically, the linear movement guide portion 410 may be installed such that, a rotary shaft of at least one of the plurality of transfer rollers and the drive motor 420 are coupled to each other so as to drive the plurality of transfer rollers.
Here, when the magnetic reaction member 22 is formed of a material including a magnetic material, which is magnetizable in a magnetic field, the magnetic reaction member 22 may be formed in various structures and shapes.
The magnetic reaction member 22 may include a magnetic material, which has an excellent high temperature characteristic.
In addition, the magnetic reaction member 22 may be installed by being coupled to a support portion 24 protruding in one lateral direction of the carrier 20.
At this time, the magnetic reaction member 22 may be supported by the support 24 provided to maintain the horizontal position of the carrier 20.
The support portion 24 may have various structures as long as it is installed on the upper side of the carrier 20 such that the magnetic reaction member 22 can maintain the horizontal position of the carrier 20.
As an example, the support portion 24 may protrude in one lateral direction of the carrier 20 to be coupled with the magnetic reaction member 22.
The deposition source 200 is a component that is installed in the process chamber 100 and evaporates the deposition material to such that the deposition material is deposited on the substrate S.
The deposition source 200 may be configured to evaporate the deposition material to the substrate S, which is moving in the process chamber 100, in a fixed state, or to evaporate the deposition material while moving relative to the fixed substrate S in the process chamber 100.
With respect to a rectangular substrate S, the deposition source 200 may be formed using a direction, which is parallel to a side perpendicular to the moving direction thereof relative to the substrate S, as the longitudinal direction.
As an example, the deposition source 200 is a component that evaporates the deposition material including at least one of an organic material, an inorganic material, and a metallic material depending on a deposition condition, and may include a crucible in which the deposition material is contained and a heater 230, which heats the crucible.
According to one embodiment, the deposition source 200 is so-called a linear source, and may include: a diffusion container 210 having a predetermined length, including at least one opening, and forming a diffusion space in which an evaporated deposition material is diffused; a nozzle portion 220 coupled to the opening in the diffusion container 210 and including a plurality of nozzles disposed along the longitudinal direction of the diffusion container 210 so as to inject the deposition material diffused in the diffusion container 210; a heater 230 installed outside the diffusion container 210 so as to heat the diffusion container 210, thereby heating the deposition material contained in the diffusion container 210; and a heating portion 230 including a heat shield portion 240 installed to surround the heater 230 so as to prevent heat, which is generated from the heater 230, from being emitted to the outside.
The diffusion container 210 is a component that has a predetermined length, includes at least one opening formed therein, and provides a space in which the deposition material to be deposited on the substrate S is diffused, and may be variously configured.
The material of the diffusion container 210 is determined depending on the physical properties of the deposition material, and any material can be used as long as it can withstand a high temperature.
In addition, the diffusion container 210 may have various shapes such as a rectangular parallelepiped shape and a cylindrical shape, and has at least one opening formed on one side thereof for coupling with the nozzle portion 220.
The opening may be formed in the diffusion container 210 to be coupled with the nozzle portion 220 on the side facing the substrate S such that the deposition material evaporated in the diffusion container 210 is injected through the nozzles.
The nozzle portion 220 is a component that is coupled to the opening in the diffusion container 210 and is provided to inject the deposition material evaporated from the diffusion container 210.
In addition, the nozzle portion 220 may include a plurality of nozzles disposed along the longitudinal direction of the diffusion container 210.
The plurality of nozzles is disposed along the longitudinal direction of the diffusion container 210 and is configured to inject the deposition material evaporated from the diffusion container 210 such that the evaporated deposition material is deposited on the substrate S.
The material of the nozzle may be any one of tantalum, stainless steel, titanium, and inconel.
At this time, the plurality of nozzles may be arranged parallel to the side which is perpendicular to the moving direction of the substrate S with respect to the rectangular substrate S.
The heating portion is a component that is installed around the diffusion container 210 so as to heat and evaporate the deposition material contained in the diffusion container 210, and may be variously configured.
According to one embodiment, the heating portion may be installed outside the diffusion container 210 so as to heat the diffusion container 210, thereby evaporating the deposition material contained in the diffusion container 210, or to keep the evaporated deposition material at a predetermined temperature such that the evaporated deposition material is not condensed into liquid.
Specifically, the heating portion may include the heater 230 installed outside the diffusion container 210 so as to heat the diffusion container 210, thereby heating the deposition material contained in the diffusion container 210 and the heat shield portion 240 installed to surround the heater 230 so as to prevent the heat, which is generated from the heater 230, from being emitted to the outside.
The heater 230 includes a heat generating member such as a heat wire so as to generate heat when power is supplied from the outside, and is installed around the diffusion container 210. However, the heater 230 may be variously configured.
The heat shield portion 240 is configured to prevent the heat, which is generated from the heater 230, from being emitted to the outside, and may be variously configured.
The heat shield portion 240 may be provided on the entire remaining surface other the nozzle opening formed in the nozzle portion 220 of the diffusion container 210.
As an example, the heat shield portion 240 may include a reflector 242 disposed outside the heater 230 so as to reflect the heat emitted from the heater 230 toward the diffusion container 210, and a cooling portion 244 disposed outside the reflector 242.
The reflector 242 is a component that is installed outside the heat wire of the heater 230 to surround the heat wire and reflects the heat radiated from the heater 230 in order to prevent the heat from being emitted to the outside, and may be variously configured.
The reflector 242 may be configured with a reflective plate, which is made of a metal such as tantalum, AlN, PBN, or tungsten, but is not limited thereto.
Of course, the reflector 242 is not an essential component of the present disclosure.
The cooling portion 244 is a component that is installed outside the diffusion container 210 or outside the reflector 242 so as to prevent the heat, which is generated from the heater 230, from being emitted to the outside, thereby cooling the diffusion container 210 side to a predetermined temperature, and may be variously configured.
Various cooling systems such as an air cooling system or a water cooling system may be applied to the cooling portion 244.
The cooling portion 244 may adopt various configurations such as a cooling module, which is built in a cooling plate and through which a coolant flows so as to cool the heat generated by the heater 230.
Meanwhile, the deposition source 200 according to the present disclosure may further include a deposition material accommodation portion that accommodates the deposition material and is coupled to one side of the diffusion container 210 so as to provide the deposition material to the diffusion container 210.
A deposition material supply portion 300 is configured to accommodate the deposition material therein and coupled to one side of the diffusion container 210 other than the one surface to which the nozzle portion of the diffusion container 210 is coupled so as to supply the deposition material to the diffusion container 210, and may be variously configured.
The deposition material supply portion 300 may be coupled to the lower surface of the diffusion container 210 in a vertical state as illustrated in FIGS. 1 and 3.
The deposition material supply portion 300 may include a heating portion, which is provided around the diffusion container 210.
The heating portion provided around the deposition material supply portion 300 may be integrally formed with the heating portion installed in the diffusion container 210 or may be constituted as an independent member.
The deposition material contained in the deposition material supply portion 300 may be evaporated by the heating portion so as to be supplied to the diffusion container 210.
Reference numeral 302 not described above denotes a support member, which fixes and supports the deposition material supply portion 300.
In the embodiment of the present disclosure, a structure in which the deposition material is supplied to the diffusion container 210 by a separate deposition material supply portion 300 has been described. Alternatively, the deposition may be contained in the diffusion container 210 without a deposition material supply portion 300, and may be evaporated by the heating portion.
On the other hand, depending on the deposition process, two or more deposition materials may need to be mixed and deposited on the substrate S.
To this end, the process chamber 100 may include two or more deposition sources, which are arranged to correspond to respective deposition materials.
According to one embodiment, the deposition apparatus may include a pair of deposition sources 200 for evaporating different deposition materials in the process chamber 100.
According to a more specific embodiment, the deposition material evaporated by one of the pair of deposition sources 200 is silver and the deposition material evaporated by the remaining deposition source 200 may be magnesium.
On the other hand, in order to form a good deposition film, it is necessary to uniformly mix two or more deposition materials, and in such a case, it is desirable to minimize the interval between the plurality of deposition sources, which evaporate different deposition materials, respectively.
According to one embodiment, as a method for minimizing the interval between the plurality of deposition sources, which evaporate different deposition materials, respectively, a plurality of nozzles in the nozzle portion 220 may be located between the center lines l of the pair of deposition sources 200.
As a structure in which the plurality of nozzles in the nozzle portion 220 are located between the center lines 1 of the pair of evaporator sources 200, when assuming that a surface, which faces a portion to which the nozzle portion 220 is coupled in the diffusion container 210, is the bottom surface, the plurality of nozzles may be disposed to be spaced apart from the longitudinal center line l of the bottom surface of the diffusion container 210.
According to a specific embodiment, the distance w between the respective nozzle portions 220 may be 20 mm or more and 200 mm or less.
Meanwhile, as illustrated in FIGS. 1 and 4, the diffusion container 210 may have any one of a rectangular shape and a trapezoidal cross-sectional shape perpendicular to the longitudinal direction of the diffusion container 210.
According to the embodiment of FIG. 1, the diffusion container 210 may have a trapezoidal cross-sectional shape perpendicular to the longitudinal direction of the diffusion container 210. In this case, one side surface of the diffusion container 210 is inclined with respect to the bottom surface, the other side surface of the diffusion container 210 is perpendicular to the bottom surface. Further, an opening is formed in the surface, which is opposite the bottom surface, and the nozzle portion 220 is coupled to the opening.
When deposition sources 200 have the structure described above, the interval between the nozzles in the nozzle portion 220 between adjacent deposition sources 200 can be minimized.
In addition, when the interval between the nozzles in the nozzle portion 220 between adjacent deposition sources 200 is minimized, deposition materials evaporated from respective deposition sources are sufficiently mixed with each other, so that the mixed deposition materials can be deposited on the substrate S, thereby forming a homogeneous deposition film on the substrate S.
Meanwhile, the components of the deposition source 200 need to be separated from each other when maintenance is required in the deposition source 200 described in the embodiment of the present disclosure.
Thus, in the deposition source 200 according to the present disclosure, the heating portion may be configured with at least two heating assemblies that can be couple to or separated from each other in the coupling direction of the plurality of nozzles.
Specifically, the heating portion may be configured with a first heating assembly 250 including a first heater 230a and a first heat shield portion, a second heating assembly 260 including a second heater 230b and a second heat shield portion.
The first heating assembly 250 may be configured as a single module including the first heater 230a and the first shield portion.
The first heat shield portion of the first heating assembly 250 may include a first reflector 242a and a first cooling portion 244a.
Likewise, the second heating assembly 260 may include a single module including a second heater 230b and a second heat shield portion.
The second heat shield portion of the second heating assembly 260 may include a second reflector 242b and a second cooling portion 244b.
At this time, the first heating assembly 250 and the second heating assembly 260 may be configured independently of each other, and may be connected to different power sources so as to receive power.
As illustrated in FIG. 5, in order to prevent interference by the nozzles, the first heating assembly 250 and the second heating assembly 260 may be formed in the longitudinal direction of the diffusion container 210 to be coupled to or separated from each other along a direction in which the nozzle portion 220 is coupled to the opening in the diffusion container 210.
In addition, when the diffusion container 210 has, for example, a trapezoidal cross-sectional shape, the heating portion may have, for example, the trapezoidal shape corresponding to the shape of the trapezoidal shape of the diffusion container 210.
A longitudinal boundary between the first heating assembly 250 and the second heating assembly 260 may be parallel to the longitudinal direction of the diffusion container 210, when the diffusion container 210 has a tetragonal (rectangular or trapezoidal) cross-sectional shape, the boundary between the first heating assembly 250 and the second heating assembly 260 may be, but not exclusively, formed so as to form a diagonal line with respect to the cross section of the diffusion container 210.
That is, the boundary between the first heating assembly 250 and the second heating assembly 260 may be formed parallel to one side of the cross section of the diffusion container 210.
For example, when the diffusion container 210 has a trapezoidal cross-sectional shape perpendicular to the longitudinal direction, the first heating assembly 250 may be disposed on the bottom surface of the diffusion container 210 and a side surface of the diffusion container 210 that is perpendicular to the bottom surface, and the second heating assembly 260 may be installed on the remaining two surfaces.
Accordingly, the first heating assembly 250 may be coupled to or separated from the second heating assembly 260 along a direction in which the plurality of nozzles is coupled to the diffusion container 210.
The first heating assembly 250 and the second heating assembly 260 may be coupled to each other according to various coupling schemes.
As an example, the first heating assembly 250 and the second heating assembly 260 may have stepped structures 246, 246a, and 246b formed in the boundary between the first cooling portion 244a and the second cooling portion 244b such that the first heating assembly 250 and the second heating assembly 260 are coupled to each other, but the present disclosure is not limited thereto.
The stepped structures 246, 246a, and 246b of the first heating assembly 250 and the second heating assembly 260 may be formed to be coupled to or separated from each other in a direction in which the nozzle portion 220 and the diffusion container 210 are coupled to each other.
The deposition source 200 according to the present disclosure includes a plurality of heating assemblies 250 and 260, which are mutually coupled to or separated from each other in the direction in which the nozzle portion 220 and the diffusion container 210 are coupled to each other. Thus, the heating assemblies 250 and 260 can be easily separated without interference with other components, so that maintenance of the inner diffusion container 210 and the nozzle portion 220 can be easily performed.
In particular, when the substrate S is introduced into the process chamber 100 in the vertical state, a gate for separating the deposition source 200 out of the process chamber 100 is also disposed on a side surface of the process chamber 100. In such a case, since the heating assemblies 250 and 260 of the deposition source 200 are capable of being coupled to or separated from each other in the direction in which the nozzle portion 220 and the diffusion container 210 are coupled to each other, there is an advantage in that the assemblability and work convenience of the deposition source 200 can be further improved.
Meanwhile, while FIG. 1 illustrates the embodiment in which the substrate S is moved vertically, that is, in the erected state, when the substrate S is moved horizontally, for example, when the substrate S is moved such that the surface, which is deposited in the upper portion of the process chamber 100, faces downwards as illustrated in FIG. 2, the deposition source may be installed in the lower portion of the process chamber 100.
At this time, the nozzles in the nozzle portion 220 may be disposed to face the substrate S (that is the deposition materials are evaporated upward), and the deposition material supply portion 300 may be coupled to the opposite surface (lower surface) relative to the surface, to which the nozzle portion 220 is coupled, so as to supply the deposition material to the diffusion container 210.

Claims (12)

  1. A deposition source provided inside a process chamber for evaporating a deposition material so as to deposit the deposition material on a substrate, the deposition source comprising:
    a diffusion container having a predetermined length and defining therein a diffusion space in which the evaporated deposition material is diffused, at least one opening being formed in the diffusion container; and
    a nozzle portion coupled to the opening of the diffusion container and including a plurality of nozzles disposed along a longitudinal direction of the diffusion container so as to inject the deposition material diffused in the diffusion container,
    wherein assuming that a surface opposite a portion, to which the nozzle portion is coupled, in the diffusion container is a bottom surface, a center of the plurality of nozzles is spaced apart from a longitudinal center line of the bottom surface of the diffusion container, and the plurality of nozzles is disposed to face the substrate.
  2. The deposition source of claim 1, further comprising:
    a deposition material supply portion configured to accommodate the deposition material and coupled to one side of the diffusion container so as to supply the deposition material to the diffusion container.
  3. The deposition source of claim 1, further comprising:
    a heating portion installed outside the diffusion container,
    wherein the heating portion includes a heater configured to heat the deposition material contained in the diffusion container by heating the diffusion container and a heat shield portion installed to surround the heater so as to prevent heat generated from the heater from being emitted outwards.
  4. The deposition source of claim 3,
    wherein the heating portion is configured with at least two heating assemblies which are capable of being coupled to or separated from each other in a direction in which the plurality of nozzles is coupled.
  5. The deposition source of claim 3,
    wherein the heat shield portion includes a reflector disposed outside the heater so as to reflect the heat emitted from the heater toward the diffusion container , and a cooling portion disposed outside the reflector.
  6. The deposition source of claim 1, wherein the diffusion container has any one of rectangular and trapezoidal cross-sectional shapes perpendicular to a longitudinal direction thereof.
  7. The deposition source of claim 3, wherein the diffusion container has a trapezoidal cross-sectional shape perpendicular to a longitudinal direction thereof, the diffusion container having one side surface inclined with respect to a bottom surface thereof and other side surface perpendicular to the bottom surface.
  8. The deposition source of claim 7,
    wherein the heat shield portion has a shape corresponding to the trapezoidal cross-sectional shape of the diffusion container.
  9. The deposition source of claim 7,
    wherein the heating portion includes a first heating assembly installed on the bottom surface and the other side surface perpendicular to the bottom surface and a second heating assembly installed on remaining two surfaces, and
    the first heating assembly is capable of being coupled to or separated from the second heating assembly along a direction in which the plurality of nozzles is coupled to the diffusion container.
  10. A deposition apparatus comprising:
    a process chamber configured to provide a space in which a deposition material is deposited on a substrate; and
    a pair of deposition source according to any one of claims 1 to 9, configured to evaporate the deposition material such that the deposition material is deposited to the substrate ,
    wherein the plurality of nozzles is located between center lines of the pair of deposition sources.
  11. The deposition apparatus of claim 10, wherein the pair of deposition source evaporates different deposition materials.
  12. The deposition apparatus of claim 10, wherein the deposition material evaporated by one of the pair of deposition sources is silver and the deposition material evaporated by a remaining deposition source is magnesium.
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