WO2013140938A1 - めっき処理装置、めっき処理方法および記憶媒体 - Google Patents
めっき処理装置、めっき処理方法および記憶媒体 Download PDFInfo
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- WO2013140938A1 WO2013140938A1 PCT/JP2013/054502 JP2013054502W WO2013140938A1 WO 2013140938 A1 WO2013140938 A1 WO 2013140938A1 JP 2013054502 W JP2013054502 W JP 2013054502W WO 2013140938 A1 WO2013140938 A1 WO 2013140938A1
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- substrate
- plating
- discharge
- top plate
- plating solution
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- 0 *C1CCCC1 Chemical compound *C1CCCC1 0.000 description 2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/288—Deposition of conductive or insulating materials for electrodes conducting electric current from a liquid, e.g. electrolytic deposition
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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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1619—Apparatus for electroless plating
-
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1619—Apparatus for electroless plating
- C23C18/1628—Specific elements or parts of the apparatus
- C23C18/163—Supporting devices for articles to be coated
-
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1655—Process features
- C23C18/1664—Process features with additional means during the plating process
- C23C18/1669—Agitation, e.g. air introduction
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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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1675—Process conditions
- C23C18/1676—Heating of the solution
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76843—Barrier, adhesion or liner layers formed in openings in a dielectric
- H01L21/76849—Barrier, adhesion or liner layers formed in openings in a dielectric the layer being positioned on top of the main fill metal
Definitions
- the present invention relates to a plating apparatus, a plating method, and a storage medium that perform plating by supplying a plating solution to the surface of a substrate.
- a substrate such as a semiconductor wafer or a liquid crystal substrate is provided with wiring for forming a circuit on the surface.
- wiring instead of an aluminum material, a copper material having a low electrical resistance and a high reliability has come to be used.
- a damascene method is used in which a recess such as a via or a trench for embedding the wiring in an insulating film is formed in the substrate by etching, and the Cu wiring is embedded in them. .
- a plating solution containing CoWB (cobalt / tungsten / boron) or CoWP (cobalt / tungsten / phosphorus) is supplied to the surface of the substrate having Cu wiring, and a metal film called a cap metal is formed by electroless plating. Attempts have been made to improve the EM resistance of semiconductor devices by forming them on Cu wiring.
- Patent Document 1 proposes a plating processing apparatus including a substrate rotation mechanism that rotates a substrate and a nozzle that discharges a plating solution onto the substrate.
- a uniform flow of the plating solution is formed on the surface of the substrate by supplying the plating solution while rotating the substrate.
- the plating process is uniformly performed over the entire surface of the substrate.
- Patent Document 1 proposes a method of discharging the plating solution while moving the nozzle between the central portion of the substrate and the peripheral portion of the substrate.
- the ambient temperature around the substrate is lower than the temperature of the plating solution, the heat of the plating solution reaching the substrate is taken away by the atmosphere around the substrate. For this reason, even when the plating solution is discharged while moving the nozzle, the plating that has reached the substrate earlier than the temperature of the plating solution that has been discharged from the nozzle and has just reached the substrate The liquid temperature is low. For this reason, it is considered that the reaction conditions of the plating solution vary depending on the position on the substrate, and as a result, the thickness of the formed plating layer becomes non-uniform.
- the present invention provides a plating apparatus, a plating method, and a storage medium that can effectively solve such problems.
- a plating apparatus for performing a plating process by supplying a plating solution to a substrate, a substrate holding mechanism for holding and rotating the substrate, and a substrate held by the substrate holding mechanism
- a first discharge mechanism that discharges the plating solution toward the substrate, and a top plate that is disposed above the substrate and has an opening formed therein, and the first discharge mechanism discharges the plating solution toward the substrate. It has a first discharge part, and the first discharge part is movable between a discharge position positioned when discharging the plating solution and a standby position positioned when not discharging the plating solution.
- the first discharge unit is configured to overlap the opening of the top plate when in the discharge position.
- the step of holding the substrate by the substrate holding mechanism and the opening is formed above the substrate.
- a gas flow from the opening of the top plate toward the substrate An inhibited plating process method is provided.
- the plating method includes a step of holding a substrate by a substrate holding mechanism, A top plate having an opening formed thereon, and a plating step of discharging a plating solution from the opening toward the substrate, wherein the opening of the top plate is provided during the plating step.
- a storage medium comprising a method in which the flow of gas from a section toward the substrate is inhibited.
- the atmosphere around the substrate can be kept warm by the top plate and the first discharge part of the first discharge mechanism arranged so as to overlap the opening of the top plate. For this reason, it can suppress efficiently that the temperature of the plating solution discharged toward the board
- FIG. 1 is a plan view showing the overall configuration of a plating system according to an embodiment of the present invention.
- FIG. 2 is a side view showing a plating apparatus according to an embodiment of the present invention.
- 3A and 3B are plan views of the plating apparatus shown in FIG.
- FIG. 4 is a cross-sectional view of the first discharge portion and the top plate of the first discharge mechanism of FIG.
- FIGS. 5A to 5D are views showing modifications of the first discharge section and the top plate.
- FIG. 6 is a cross-sectional view showing a top plate according to an embodiment of the present invention.
- 7A (a) and 7 (b) are views showing a process of holding a substrate by a substrate holding mechanism.
- 7B (a) and 7 (b) are diagrams showing a pre-wet process.
- FIGS. 7C (a) and 7 (b) are diagrams showing a plating process.
- 7D (a) and 7 (b) are diagrams showing a rinsing process.
- FIG. 8 is a diagram illustrating a state in which the rinse treatment liquid is discharged from the first discharge port.
- FIGS. 9A and 9B are views showing a modification of the plating step.
- FIGS. 10A and 10B are views showing a modification of the plating step.
- FIGS. 11A and 11B are views showing a modification of the rinsing process.
- 12A to 12C are views showing modifications of the opening formed in the top plate.
- FIGS. 1 to 7D First, the overall configuration of the plating system 1 in the present embodiment will be described with reference to FIG.
- the plating system 1 mounts a carrier 3 that accommodates a plurality of substrates 2 (here, 25 semiconductor wafers) (for example, 25 wafers), and carries in a predetermined number of substrates 2. And a substrate loading / unloading chamber 5 for unloading and a substrate processing chamber 6 for performing various processes such as plating and cleaning of the substrate 2.
- the substrate carry-in / out chamber 5 and the substrate processing chamber 6 are provided adjacent to each other.
- the substrate carry-in / out chamber 5 includes a carrier placement unit 4, a transfer chamber 9 that stores the transfer device 8, and a substrate transfer chamber 11 that stores a substrate transfer table 10.
- the transfer chamber 9 and the substrate delivery chamber 11 are connected to each other via a delivery port 12.
- the carrier placement unit 4 places a plurality of carriers 3 that accommodate a plurality of substrates 2 in a horizontal state.
- the substrate 2 is transferred, and in the substrate transfer chamber 11, the substrate 2 is transferred to and from the substrate processing chamber 6.
- a predetermined number of substrates 2 are transported by the transport device 8 between any one carrier 3 placed on the carrier platform 4 and the substrate delivery table 10.
- the substrate processing chamber 6 is arranged in the front and back on one side and the other side of the substrate transfer unit 13 and extends in the front and back in the central portion, and supplies the plating solution to the substrate 2 to perform the plating process.
- a plurality of plating processing apparatuses 20 are arranged in the front and back on one side and the other side of the substrate transfer unit 13 and extends in the front and back in the central portion, and supplies the plating solution to the substrate 2 to perform the plating process.
- a plurality of plating processing apparatuses 20 is arranged in the front and back on one side and the other side of the substrate transfer unit 13 and extends in the front and back in the central portion, and supplies the plating solution to the substrate 2 to perform the plating process.
- the substrate transport unit 13 includes a substrate transport device 14 configured to be movable in the front-rear direction.
- the substrate transfer unit 13 communicates with the substrate transfer table 10 in the substrate transfer chamber 11 via the substrate transfer port 15.
- the substrates 2 are transferred to the respective plating processing apparatuses 20 in a state where the substrates 2 are held horizontally one by one by the substrate transfer device 14 of the substrate transfer unit 13. Then, in each plating processing apparatus 20, the substrate 2 is subjected to cleaning processing and plating processing one by one.
- Each plating apparatus 20 differs only in the plating solution used, and the other points have substantially the same configuration. Therefore, in the following description, the configuration of one plating processing apparatus 20 among the plurality of plating processing apparatuses 20 will be described.
- FIG. 2 is a side view illustrating the plating apparatus 20
- FIGS. 3A and 3B are plan views illustrating the plating apparatus 20.
- the plating apparatus 20 holds the substrate 2 inside the casing 101 and rotates the substrate 2 and the plating solution toward the surface of the substrate 2 held by the substrate holding mechanism 110.
- a first discharge mechanism 30 that discharges; a plating solution supply mechanism 71 that is connected to the first discharge mechanism 30 and supplies a plating solution to the first discharge mechanism 30; and a top plate 21 disposed above the substrate 2.
- the plating apparatus 20 may further include a second discharge mechanism 40 that discharges a processing liquid or the like toward the surface of the substrate 2.
- a gas introduction unit 50 to which a gas such as N 2 gas (nitrogen gas) or clean air is supplied from an FFU (fan filter unit) 51 is provided.
- the gas in the gas introduction part 50 is sent toward the substrate 2 by a down flow through the rectifying plate 52.
- a drain cup 120 having a first opening 121 and a second opening 126 for receiving a liquid such as a plating solution or a processing solution scattered from the substrate 2, and an opening 106 for drawing a gas.
- the exhaust cup 105 is disposed.
- the liquid received by the first opening 121 and the second opening 126 of the drainage cup 120 is discharged by the first drainage mechanism 122 and the second drainage mechanism 127.
- the gas drawn into the opening 106 of the exhaust cup 105 is exhausted by the exhaust mechanism 107.
- the drainage cup 120 is connected to the lifting mechanism 164, and the lifting mechanism 164 can move the drainage cup 120 up and down. For this reason, by raising and lowering the drainage cup 120 according to the type of liquid splashed from the substrate 2, the path through which the liquid is discharged can be made different according to the type of liquid.
- the substrate holding mechanism 110 includes a hollow cylindrical rotating shaft member 111 that extends vertically in the casing 101, a turntable 112 attached to the upper end of the rotating shaft member 111, and a turntable 112.
- a wafer chuck 113 that supports the substrate 2 and a rotation mechanism 162 that is connected to the rotation shaft member 111 and that rotates the rotation shaft member 111.
- the rotation mechanism 162 is controlled by the control mechanism 160 and rotates the rotation shaft member 111, whereby the substrate 2 supported by the wafer chuck 113 is rotated.
- the control mechanism 160 can rotate or stop the rotation shaft member 111 and the wafer chuck 113 by controlling the rotation mechanism 162. Further, the control mechanism 160 can control the rotational speed of the rotating shaft member 111 and the wafer chuck 113 to be increased, decreased, or maintained at a constant value.
- the first discharge mechanism 30 has a first discharge unit 33 for discharging the plating solution toward the substrate 2.
- the first discharge unit 33 is configured as a discharge head provided with a discharge port for discharging the plating solution toward the substrate 2.
- the type of plating solution is not particularly limited, and various plating solutions can be discharged from the first discharge mechanism 30 depending on the application.
- a plating solution containing CoWB (cobalt / tungsten / boron) or CoWP (cobalt / tungsten / phosphorus) for forming a metal film on the surface of a substrate having a Cu wiring may be used.
- a plating solution for forming a barrier film provided on the surface of the substrate or the concave portion of the substrate before the Cu wiring is formed for example, CoWB or Ta
- a plating solution containing (tantalum) may be used.
- the first discharge unit 33 is configured to be movable in the vertical direction and the horizontal direction.
- the first discharge unit 33 is attached to the tip of the arm 32, and the arm 32 can be extended in the vertical direction and is fixed to the support shaft 31 that is rotationally driven by the rotation mechanism 165.
- the first discharge unit 33 is placed at a discharge position when the plating solution is discharged toward the substrate 2 and a standby position when the plating solution is not discharged. It can be moved between positions.
- the standby position is, for example, a position where the first discharge unit 33 is retracted in the horizontal direction with respect to the substrate 2.
- the first discharge unit 33 includes a first discharge port 34.
- the first discharge port 34 is configured such that the discharged plating solution reaches the center of the substrate 2 when the first discharge portion 33 is at a discharge position described later.
- the plating solution that has reached the center of the substrate 2 flows toward the peripheral edge of the substrate 2 due to the centrifugal force resulting from the rotation of the substrate 2.
- the first discharge unit 33 may extend so as to correspond to the length from the center of the substrate 2 to the peripheral edge of the substrate 2, that is, the radius of the substrate 2.
- the first discharge unit 33 may further include a plurality of second discharge ports 35 arranged in a predetermined direction in addition to the first discharge port 34 described above.
- the second discharge ports 35 are configured such that the second discharge ports 35 are arranged in the radial direction of the substrate 2 when the first discharge unit 33 is at the discharge position. Therefore, the plating solution can be directly supplied from the discharge ports 34 and 35 of the first discharge portion 33 to a region within a predetermined range from the center portion to the peripheral portion of the substrate 2.
- directly supplying means that the path for the plating solution to reach a predetermined region on the substrate 2 is caused by the rotation of the substrate 2 when the plating solution dropped on the center side of the substrate 2 from the predetermined region. This means that it is not a path that reaches the predetermined area by the centrifugal force, but a path that the plating solution is dropped onto the predetermined area.
- the ambient temperature around the substrate 2 or the temperature of the substrate 2 is lower than the temperature of the plating solution discharged from the first discharge unit 33. For this reason, when the plating solution dropped on or near the center portion of the substrate 2 flows outwardly by centrifugal force on the substrate 2, the temperature of the plating solution is considered to become lower toward the peripheral side of the substrate 2. . For this reason, in the case of a plating process in which a plating solution is dropped only at or near the center of the substrate 2 and the plating solution is distributed over the entire region of the substrate 2 by centrifugal force, the temperature of the plating solution on the substrate 2 is: It is thought that it becomes low as it goes from the center part of the board
- the 1st discharge part 33 contains the some 2nd discharge port 35 as mentioned above, a plating solution is directly supplied with respect to the area
- each of the discharge ports 34 and 35 is formed at the tips of a plurality of nozzles provided so as to protrude downward from the discharge head of the first discharge unit 33.
- the form of each discharge port 34, 35 is not limited to the form shown in FIG.
- a nozzle that protrudes downward as illustrated in FIG. 2 may not be provided in the first discharge unit 33.
- each of the discharge ports 34 and 35 may be configured as an opening formed in the discharge head of the first discharge unit 33.
- the shape of each discharge port 34 and 35 is not specifically limited, Shapes, such as a round hole and a slit, are employ
- the discharge port 35 of the first discharge unit 33 may have a shape such as a slit port extending along the radial direction of the substrate 2.
- the plating solution can be directly supplied to a region within a predetermined range in the radial direction of the substrate 2 even when the number of the discharge ports 35 provided in the first discharge unit 33 is single or small. it can.
- the second discharge mechanism 40 includes a second discharge unit 43 that discharges a processing liquid or the like toward the substrate 2.
- the 2nd discharge part 43 is comprised so that it can move to an up-down direction and a horizontal direction.
- the second discharge unit 43 is attached to the tip of the arm 42, and this arm 42 can be extended in the vertical direction and is driven to rotate by the rotation mechanism 166.
- the support shaft 41 is fixed.
- the second discharge unit 43 includes a first discharge port 44 and a second discharge port that discharge a liquid such as a processing solution and a plating solution toward the substrate 2, as in the case of the first discharge unit 33.
- a discharge head provided with an outlet 45 and a third discharge port 46 is configured.
- the processing liquid for example, a rinsing processing liquid such as DIW for performing the rinsing processing of the substrate 2, a cleaning processing liquid such as MEL for performing the cleaning processing of the substrate 2, and a drying processing of the substrate 2 are performed.
- dry treatment liquids such as IPA.
- An example of the plating solution is the same as the plating solution discharged from the first discharge mechanism 30 described above.
- each discharge port 44, 45, 46 is not particularly limited, and can be appropriately selected according to the application.
- a rinse treatment liquid supply mechanism 73 that supplies a rinse treatment liquid is connected to the first discharge port 44
- a plating solution supply mechanism 74 that supplies a plating solution is connected to the second discharge port 45.
- the third discharge port 46 is supplied with a cleaning processing liquid supply mechanism 75 that supplies a cleaning processing liquid.
- each of the discharge ports 44, 45, 46 protrudes downward from the discharge head of the second discharge unit 43 as in the case of the discharge ports 34, 35 of the first discharge unit 33. It is formed at the tip of a plurality of nozzles provided.
- the form of each discharge port 44, 45, 46 is not limited to the form shown in FIG.
- the nozzle that protrudes downward as illustrated in FIG. 2 may not be provided in the second discharge portion 43.
- each ejection port 44, 45, 46 may be configured as an opening formed in the ejection head of the second ejection unit 43.
- the top plate 21 is for preventing the ambient atmosphere of the substrate 2 from being diffused into the plating apparatus 20.
- the top plate 21 it is possible to prevent various substances contained in the ambient atmosphere of the substrate 2 from adhering to the constituent elements of the plating apparatus 20 and thereby generating particles. Further, as will be described later, it is possible to suppress the gas around the substrate 2 from flowing, and thereby it is possible to suppress the heat of the atmosphere around the substrate 2 from escaping to the outside.
- the top plate 21 is configured to be movable in the vertical direction.
- the top plate 21 is attached to one end of the support portion 25, and the other end of the support portion 25 is attached to the movable portion 24.
- the movable portion 24 is configured to be moved by the drive mechanism 167 along the support shaft 23 extending in the vertical direction.
- the drive mechanism 167 By using such a drive mechanism 167, the support shaft 23, the movable part 24, and the support part 25, the distance between the board
- the top plate 21 can be moved between a first position where the top plate 21 is located in the vicinity of the substrate 2 and a second position and a third position, which will be described later, above the first position. .
- FIGS. 3A and 3B are plan views showing the top plate 21, the first discharge mechanism 30, and the second discharge mechanism 40, respectively.
- the substrate 2 covered from above by the top plate 21 is indicated by a dotted line.
- the first discharge mechanism 30 arranged at the above-described standby position is indicated by a dotted line
- the first discharge mechanism 30 arranged at the above-described discharge position is indicated by a solid line.
- the second discharge mechanism 40 is disposed at the standby position.
- the opening 22 of the top plate 21 is formed so as to extend from the center of the top plate 21 to the outer peripheral edge of the top plate 21.
- the first discharge unit 33 of the first discharge mechanism 30 is configured to overlap the opening 22 of the top plate 21 when in the discharge position.
- “configured to overlap” means that the first discharge part 33 inhibits the gas flow from the top plate 21 through the opening 22 to the bottom of the top plate 21. This means that the unit 33 is configured.
- FIG. 3A shows an example in which the contour of the opening 22 of the top plate 21 and the contour of the first discharge portion 33 are substantially coincident when viewed from the normal direction of the top plate 21. Yes.
- FIG. 4 is a cross-sectional view of the first discharge section 33 and the top plate 21 of FIG. 3A viewed from the IV-IV direction.
- the first discharge unit 33 is configured to close the opening 22 with a gap s between the first discharge unit 33 and the end 21 a of the top plate 21.
- the width of the gas flow path passing through the opening 22 can be limited to the gap s.
- the impedance when gas passes through the opening 22 can be increased. That is, the gas flow F in the space between the substrate 2 and the top plate 21 can be suppressed.
- the specific value of the gap s between the top plate 21 and the first discharge unit 33 is not particularly limited and is appropriately set according to the application.
- the gap s is 0.3 to 3.0 mm. It is within the range.
- the material constituting the top plate 21 is not particularly limited, but for example, a ceramic material or a metal material such as aluminum can be used.
- the top plate 21 is configured to be movable toward the substrate 2 without interfering with the first discharge unit 33.
- the first discharge unit 33 is configured to be inserted into the opening 22 from above. In this case, the downward movement of the top plate 21 is not hindered by the first discharge unit 33. For this reason, the top plate 21 can be brought as close as possible to the substrate 2. Therefore, compared with the case where the 1st discharge part 33 is arrange
- the relationship between the opening 22 of the top plate 21 and the first discharge unit 33 is not limited to the example shown in FIG. 4, and various modifications can be considered.
- a side protrusion 21 b that protrudes in the horizontal direction toward the first discharge part 33 may be formed at the end 21 a of the top plate 21.
- the upper protrusion part 21c which protrudes upwards may be formed in the edge part 21a of the top plate 21.
- the first discharge portion 33 may be formed with a side protrusion 33 b that protrudes sideways along the upper surface of the upper protrusion 21 c of the top plate 21.
- a lower protrusion 33 c that protrudes downward from the side protrusion 33 b toward the top plate 21 along the side surface of the upper protrusion 21 c is further formed in the first discharge part 33. It may be. Further, the predetermined gap s between the top plate 21 and the first discharge part 33 may constitute the entire gas flow path reaching the top atmosphere of the substrate 2, and a part of the flow path may be formed. It may be configured. By adopting these modified examples, the impedance when the gas passes through the opening 22 can be further increased.
- FIG. 4 and 5A to 5D show examples in which a predetermined gap s is provided between the top plate 21 and the first discharge unit 33.
- the present invention is not limited to this, and the top plate 21 and the first discharge unit 33 may be in contact with each other when the opening 22 is closed by the first discharge unit 33. Thereby, the opening 22 can be closed more firmly.
- produces by contact and the concern that the board
- the second discharge unit 43 is how being moved in the rotational direction R 2 are shown the support shaft 41 as a rotation axis.
- the second discharge portion 43 of the second discharge mechanism 40 has a sufficient amount of gas from above the top plate 21 through the opening 22 and below the top plate 21 even when the second discharge portion 43 is at the discharge position. It is configured to be able to flow.
- the contour of the second discharge portion 43 when viewed from the normal direction of the top plate 21 is sufficiently smaller than the contour of the opening 22 of the top plate 21. .
- the second ejection mechanism 40 the second discharge unit 43 is configured to pass over the aperture 22 of the top plate 21 when the second discharge unit 43 is moved horizontally in the direction of rotation R 2.
- the processing liquid or the liquid from the second discharge unit 43 is moved toward the substrate 2 while moving the second discharge unit 43 in the horizontal direction.
- a plating solution or the like can be discharged.
- the top plate 21 may have a first discharge port 26 and a second discharge port 27 that discharge a processing solution, a plating solution, or a processing fluid toward the substrate 2.
- a processing liquid such as DIW for performing the rinsing processing of the substrate 2
- a cleaning processing liquid such as MEL for performing the cleaning processing of the substrate 2
- IPA for performing the drying processing of the substrate 2.
- An example of the plating solution is the same as the plating solution discharged from the first discharge mechanism 30 described above.
- the processing fluid include N 2 gas and dry air for drying the substrate 2.
- a plating solution supply mechanism 76 that supplies a plating solution is connected to the first discharge port 26, and an air supply mechanism 77 that supplies dry air is connected to the second discharge port 27.
- a plating solution supply mechanism 76 that supplies a plating solution is connected to the first discharge port 26, and an air supply mechanism 77 that supplies dry air is connected to the second discharge port 27.
- a heater 28 may be provided on the top plate 21.
- the heater 28 may be configured to heat a space between the top plate 21 and the substrate 2.
- Examples of such a heater 28 include a heater that uses heat generated by passing a current through a resistor, and a heater that is configured to circulate a heat medium supplied from outside in or near the top plate 21. Can be mentioned.
- the heater 28 may be configured to heat the substrate 2 and thereby heat the plating solution on the substrate 2 or the gas in the space between the top plate 21 and the substrate 2.
- Examples of such a heater 28 include an infrared heater and an LED heater.
- the atmosphere between the top plate 21 and the substrate 2 can be maintained at a higher temperature, and the temperature of the plating solution on the substrate 2 can be maintained at a higher temperature. For this reason, it can further suppress that the temperature of the plating solution 37 discharged toward the board
- the plating processing system 1 including a plurality of plating processing apparatuses 20 configured as described above is driven and controlled by the control mechanism 160 according to various programs recorded on the storage medium 161 provided in the control mechanism 160, thereby Various processes are performed.
- the storage medium 161 stores various programs such as various setting data and a plating processing program described later.
- known media such as a computer-readable memory such as ROM and RAM, and a disk-shaped storage medium such as a hard disk, CD-ROM, DVD-ROM, and flexible disk can be used.
- the plating processing system 1 and the plating processing apparatus 20 are driven and controlled to perform plating processing on the substrate 2 in accordance with a plating processing program recorded in the storage medium 161.
- a method of forming a CoWB plating layer on the surface of the substrate 2 by discharging a CoWB plating solution toward the substrate 2 in one plating processing apparatus 20 will be described with reference to FIGS. This will be described with reference to FIGS. 7D (a) and 7 (b) and FIG. 7A (a) (b) to 7D (a) (b), the diagram shown in (a) represents the top plate 21 and the discharge mechanisms 30, 40 when viewed from the side. The figure shown in (b) represents the top plate 21 and the discharge mechanisms 30 and 40 when viewed from above.
- a single substrate 2 is carried into the plating apparatus 20 from the substrate delivery chamber 11 using the substrate transfer device 14 of the substrate transfer unit 13.
- the drain cup 120 is lowered to a predetermined position, and then the loaded substrate 2 is held by the wafer chuck 113 of the substrate holding mechanism 110.
- the top plate 21 is raised to the third position by the drive mechanism 167 as shown in FIG. In the third position, the distance h 3 between the substrate 2 and the top plate 21 has a 80mm example.
- the drainage cup 120 is raised by the elevating mechanism 164 to a position where the second opening 126 of the drainage cup 120 and the outer peripheral edge of the substrate 2 face each other.
- the 1st discharge mechanism 30 and the 2nd discharge mechanism 40 are each arrange
- a gas such as clean air is always sent from the gas introduction unit 50 in a downflow, and this gas is discharged by the exhaust mechanism 107 through the exhaust cup 105. Thereby, the atmosphere inside the plating apparatus 20 can be continuously replaced, and thereby the safety inside the plating apparatus 20 can be ensured.
- a so-called pre-wet process is performed in which a rinse treatment liquid such as DIW is discharged toward the substrate 2 before the plating process.
- a rinse treatment liquid such as DIW
- the top plate 21 is lowered to the second position below the third position by the driving mechanism 167.
- the distance h 2 between the substrate 2 and the top plate 21 has a 20mm example.
- the second discharge part 43 is moved in the horizontal direction from the central part of the substrate 2 to the peripheral part of the substrate 2, or the second discharge part 43 is horizontally moved from the peripheral part of the substrate 2 to the central part of the substrate 2.
- the rinse treatment liquid 48 is discharged from the first discharge port 44 of the second discharge unit 43 toward the surface of the substrate 2.
- the rinse treatment liquid 48 scattered from the substrate 2 is discharged by the second drainage mechanism 127 through the second opening 126 of the drainage cup 120.
- FIG. 8 is a view showing a droplet 48a of the rinse treatment liquid 48 discharged from the first discharge port 44 toward the substrate 2 in the pre-wet process.
- the second discharge unit 43 is moved in the horizontal direction while discharging the droplets 48a of the rinse treatment liquid 48.
- the droplet 48 a discharged from the first discharge port 44 directly reaches the recess 2 a of the substrate 2.
- physical energy resulting from the kinetic energy of the droplet 48 a is transmitted to the recess 2 a of the substrate 2.
- the rinse process liquid 48 can be spread to every corner of the recessed part 2a. it can.
- a plating process for discharging the plating solution from the first discharge mechanism 30 toward the substrate 2 is performed.
- This plating process is preferably started while the rinsing liquid 48 remains on the substrate 2. In this way, by starting the plating process in a state where the substrate 2 is not dried, it is possible to prevent the surface to be plated of the substrate 2 from being oxidized and failing to perform a favorable plating process.
- the top plate 21 is lowered to the first position below the second position by the drive mechanism 167.
- the distance h 1 between the substrate 2 and the top plate 21 is, for example, 10 mm.
- the first discharge portion 33 of the first discharge mechanism 30 is moved to a discharge position where the opening 22 can be closed by the first discharge portion 33.
- the first discharge unit 33 is first lifted from the standby position, and then moved horizontally along the rotation direction R 1 until the first discharge unit 33 overlaps the opening 22 as shown in FIG. 7C (b). . Thereafter, as shown in FIG.
- the first discharge portion 33 and the discharge ports 34 and 35 are lowered to the space of the opening portion 22 of the top plate 21. Further, the drainage cup 120 is raised by the elevating mechanism 164 to a position where the first opening 121 of the drainage cup 120 and the outer peripheral edge of the substrate 2 face each other.
- the positions of the tips of the discharge ports 34 and 35 are not particularly limited and can be set as appropriate. For example, the positions of the tips of the discharge ports 34 and 35 may be lower or higher than the position of the lower surface of the top plate 21.
- the plating solution 37 is discharged from the opening 22 of the top plate 21 toward the substrate 2.
- the temperature of the plating solution 37 is appropriately adjusted by the plating solution supply mechanism 71.
- the temperature of the plating solution 37 is adjusted within the range of 60 to 80 degrees.
- the plating solution 37 scattered from the substrate 2 is discharged by the first drainage mechanism 122 through the first opening 121 of the drainage cup 120.
- discharge the plating solution 37 from the opening 22 means that the path of the plating solution 37 reaching the substrate 2 is a route through the opening 22.
- the plating solution 37 passes through the piping in the first discharge portion 33 and is discharged.
- the plating solution 37 passes through the opening 22 until reaching 34 and 35.
- the plating solution 37 is supplied from the discharge ports 34 and 35 in a state where the discharge ports 34 and 35 of the first discharge unit 33 are arranged above the space of the opening 22. Is discharged, the plating solution 37 discharged from the discharge ports 34 and 35 passes through the opening 22 before reaching the substrate 2.
- the first ejection unit 33 is configured and arranged so as to overlap the opening 22 of the top plate 21. Therefore, gas impedance when passing through the opening 22 of the top plate 21 (the impedance of the path indicated by arrow F 2 in FIG. 7C (a)), gas when passing through the outer peripheral edge near the top plate 21 can be larger than the impedance (the impedance of the path indicated by arrow F 1 in FIG. 7C (a)). As a result, the path when the gas discharged by the exhaust mechanism 107 through the vicinity of the top plate 21 is a path indicated by primarily arrow F 1.
- the flow of gas from the opening 22 of the top plate 21 toward the substrate 2 is inhibited or suppressed while continuing the replacement of the atmosphere inside the plating apparatus 20. It is possible to inhibit or suppress the gas flow in the space between. Thereby, it is possible to prevent the heat accumulated in the space between the substrate 2 and the plating solution 37 on the substrate 2 and the substrate 2 and the top plate 21 from escaping outward. For this reason, it can suppress efficiently that the temperature of the plating solution 37 discharged toward the board
- the space between the top plate 21 and the substrate 2 and the substrate 2 are heated by the heater 28 provided on the top plate 21. Yes.
- the temperature of the plating solution 37 on the substrate 2 can be maintained at a higher temperature. For this reason, the temperature distribution of the plating solution 37 on the substrate 2 can be made more uniform.
- a rinsing process for supplying a rinsing liquid such as DIW toward the substrate 2 is performed.
- the top plate 21 is raised to the second position by the drive mechanism 167.
- the drainage cup 120 is raised to a position where the second opening 126 of the drainage cup 120 and the outer peripheral edge of the substrate 2 face each other.
- the rinse treatment liquid 48 is discharged from the first discharge port 44 toward the substrate 2.
- the second discharge portion 43 is moved in the horizontal direction from the center portion of the substrate 2 to the peripheral portion of the substrate 2 or the second discharge portion 43 is moved to the substrate 2.
- the rinsing liquid 48 is discharged from the first discharge port 44 of the second discharge portion 43 toward the surface of the substrate 2 while moving in the horizontal direction from the peripheral portion of the substrate 2 to the center portion of the substrate 2. As a result, the rinse treatment liquid 48 can be spread to every corner of the recess 2a.
- the rinse treatment liquid 48 scattered from the substrate 2 is discharged by the second drainage mechanism 127 through the second opening 126 of the drainage cup 120.
- the opening 22 is formed in the top plate 21, and the contour of the second discharge portion 43 of the second discharge mechanism 40 is the same as the contour of the opening 22 of the top plate 21.
- the impedance at the time of gas passing the opening part 22 of the top plate 21 can be made small.
- the top plate 21 is disposed at a second position above the first position in the plating step, thereby reducing the impedance when gas passes through the space between the substrate 2 and the top plate 21. can do.
- the gas flow rate through the opening 22 of the top plate 21 during the rinsing process can be made larger than the gas flow rate through the opening 22 of the top plate 21 during the plating step described above.
- the substrate 2 and the ambient atmosphere of the substrate 2 can be kept clean. For example, by forming a gas flow on the substrate 2, it is possible to prevent the liquid splashed from the substrate 2 and colliding with the drain cup 120 or the exhaust cup 105 from adhering to the substrate 2 again. This can prevent impurities such as particles from being formed on the substrate 2.
- the rinse treatment step is preferably started while the plating solution 37 remains on the substrate 2.
- a high quality plating layer can be obtained by starting the rinse treatment process in a state where the substrate 2 is not dried.
- a drying process step of discharging a drying process liquid such as IPA toward the substrate 2 is performed.
- the second discharge part 43 is moved in the horizontal direction from the central part of the substrate 2 to the peripheral part of the substrate 2, or the second discharge part 43 is horizontally moved from the peripheral part of the substrate 2 to the central part of the substrate 2.
- IPA is discharged from the third discharge port 46 of the second discharge unit 43 toward the surface of the substrate 2.
- dry air may be discharged toward the substrate 2 from the second discharge port 27 formed in the top plate 21.
- the top plate 21 may be disposed at the second position described above, or may be disposed at other positions such as the third position.
- the substrate 2 is unloaded from the plating apparatus 20 using the substrate transfer device 14 of the substrate transfer unit 13.
- substrate 2 carried out may be carried in into the other plating processing apparatus 20 in order to implement a further process.
- the opening 22 is formed in the top plate 21 disposed above the substrate 2.
- a plating solution 37 is discharged from the opening 22 of the top plate 21 toward the substrate 2.
- the first discharge portion 33 of the first discharge mechanism 30 can be overlaid on the opening 22 of the top plate 21 when in the discharge position. For this reason, it can suppress that the heat
- the required amount of heat per unit time input to the periphery of the substrate 2 or the substrate 2 can be reduced. it can.
- the required amount of heat input via the plating solution 37 can be reduced, and thereby the amount of the plating solution 37 discharged toward the substrate 2 per unit time can be reduced.
- the length of the first discharge part 33 of the first discharge mechanism 30 can be made shorter than before.
- the required amount of heat can be ensured by the plating solution 37 discharged from the first discharge portion 33 extending by a distance corresponding to the radius, not the diameter of the substrate 2.
- the size of the opening 22 of the top plate 21 formed to correspond to the first discharge unit 33 can be reduced. Thereby, the further synergistic effect that the impedance at the time of gas passing through the opening part 22 can be made larger can be produced.
- the contour of the second ejection part 43 provided with the first ejection port 44 for ejecting the rinse treatment liquid 48 is sufficiently smaller than the contour of the opening 22 of the top plate 21. ing. For this reason, in processes other than the plating process such as the rinsing process, a sufficient gas flow rate from the central part of the substrate 2 toward the peripheral part of the substrate 2 can be secured. The atmosphere can be kept clean.
- the opening 22 is formed in the top plate 21, and the shape of the first discharge part 33 used in the plating process and the shape of the second discharge part 43 used in the rinsing process are used. By appropriately setting the above, it is possible to achieve both heat retention in the plating process and atmosphere substitution in the rinsing process.
- the top plate 21 is disposed at the second position during the rinsing process.
- the present invention is not limited to this, and as shown in FIGS. 9A and 9B, the top plate 21 may be disposed at a third position above the second position in the rinsing process. .
- the impedance when the gas passes through the opening 22 of the top plate 21 can be further reduced.
- the substrate 2 and the ambient atmosphere of the substrate 2 can be kept clean.
- the present invention is not limited to this, and as shown in FIGS. 10A and 10B, the second discharge mechanism is used as the first plating step before the plating solution 37 is discharged from the first discharge mechanism 30.
- the plating solution 49 may be discharged from the 40 second discharge ports 45 toward the substrate 2.
- the second discharge port 45 and the first discharge port 44 used in the pre-wet process are both provided in the second discharge unit 43. For this reason, it is possible to easily realize that the discharge of the plating solution 49 toward the substrate 2 is started while the rinse treatment solution 48 remains on the substrate 2. At this time, as shown in FIG.
- the plating solution 49 may be discharged while the second discharge portion 43 is moved in the horizontal direction.
- the first discharge portion 33 of the first discharge mechanism 30 rotates while the first discharge port 44 provided in the second discharge portion 43 discharges the plating solution 49. or it may be moved toward the opening 22 along the direction R 1.
- a step of discharging the plating solution 37 from the discharge ports 34 and 35 of the first discharge mechanism 30 toward the substrate 2 is performed as a second plating step.
- the arrangement of the top plate 21 is not particularly limited.
- the arrangement of the top plate 21 may remain in the second position during the pre-wet process, or although not shown, the top plate 21 is arranged in the first position. It may be.
- the rinse process liquid 48 was discharged from the 2nd discharge mechanism 40 toward the board
- the present invention is not limited to this.
- the top plate is used as the first rinsing process before the rinsing liquid 48 is discharged from the second discharge mechanism 40.
- the rinse treatment liquid 26 a may be discharged toward the substrate 2 from the first discharge port 26 formed in 21.
- the arrangement of the top plate 21 is not particularly limited.
- the arrangement of the top plate 21 may remain at the first position in the plating process, or the top plate 21 is in the second position or the third position, although not shown. May be arranged.
- the opening 22 of the top plate 21 is formed so as to extend from the center of the top plate 21 to the outer peripheral edge of the top plate 21 has been described.
- the present invention is not limited to this, and various shapes of openings 22 can be selected according to the amount of plating solution required per unit time, required heat retention, and the like.
- the opening 22 may have a larger width in a region corresponding to the central portion of the substrate 2 than in a region corresponding to the peripheral portion of the substrate 2. As a result, the amount of the plating solution discharged toward the center of the substrate 2 can be increased.
- the opening 22 may extend from one outer peripheral edge of the top plate 21 to the other outer peripheral edge.
- the first discharge unit 33 of the first discharge mechanism 30 is configured to overlap the opening 22 of the top plate 21 when in the discharge position.
- a so-called post-cleaning process that discharges the cleaning liquid toward the substrate 2 may be further performed.
- the cleaning processing liquid may be discharged toward the substrate 2 from the third discharge port 46 of the second discharge mechanism 40.
- cleaning process process may be implemented as what is called a pre-cleaning process before a plating process.
- the second discharge unit 43 is moved in the horizontal direction from the central part of the substrate 2 to the peripheral part of the substrate 2, or the second discharge part 43 is moved from the peripheral part of the substrate 2 to the center of the substrate 2.
- the IPA is discharged from the third discharge port 46 of the second discharge unit 43 toward the surface of the substrate 2 while being moved in the horizontal direction, but the present invention is not limited to this.
- the IPA may be discharged from the third discharge port 46 of the second discharge portion 43 from the substantially central portion toward the surface of the substrate 2.
- the example in which the first discharge unit 33 is configured as a discharge head that is provided with a discharge port and in which piping for guiding the plating solution to the discharge port is accommodated has been described.
- the specific configuration of the first discharge unit 33 is not particularly limited as long as the first discharge unit 33 has a structure that overlaps the opening 22 of the top plate 21 when in the discharge position.
- the first discharge unit 33 may be configured as a discharge nozzle including a pipe through which the plating solution passes and a discharge port connected to the pipe.
- the specific configuration of the second discharge unit 43 is not particularly limited.
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Abstract
Description
このため、めっき液の反応条件が、基板の中心部と基板の周縁部とで異なってしまうことが考えられる。このような反応条件のばらつきを防ぐため、特許文献1においては、基板の中心部と基板の周縁部との間でノズルを移動させながらめっき液を吐出する方法が提案されている。
図1に示すように、めっき処理システム1は、基板2(ここでは、半導体ウエハ)を複数枚(たとえば、25枚)収容するキャリア3を載置し、基板2を所定枚数ずつ搬入及び搬出するための基板搬入出室5と、基板2のめっき処理や洗浄処理などの各種の処理を行うための基板処理室6と、を含んでいる。基板搬入出室5と基板処理室6とは、隣接して設けられている。
基板搬入出室5は、キャリア載置部4、搬送装置8を収容した搬送室9、基板受渡台10を収容した基板受渡室11を有している。基板搬入出室5においては、搬送室9と基板受渡室11とが受渡口12を介して連通連結されている。キャリア載置部4は、複数の基板2を水平状態で収容するキャリア3を複数個載置する。搬送室9では、基板2の搬送が行われ、基板受渡室11では、基板処理室6との間で基板2の受け渡しが行われる。
また基板処理室6は、中央部において前後に伸延する基板搬送ユニット13と、基板搬送ユニット13の一方側および他方側において前後に並べて配置され、基板2にめっき液を供給してめっき処理を行う複数のめっき処理装置20と、を有している。
以下、図2および図3(a)(b)参照して、めっき処理装置20について説明する。図2は、めっき処理装置20を示す側面図であり、図3(a)(b)は、めっき処理装置20を示す平面図である。
基板保持機構110は、図2に示すように、ケーシング101内で上下に伸延する中空円筒状の回転軸部材111と、回転軸部材111の上端部に取り付けられたターンテーブル112と、ターンテーブル112の上面外周部に設けられ、基板2を支持するウエハチャック113と、回転軸部材111に連結され、回転軸部材111を回転駆動する回転機構162と、を有している。
次に第1吐出機構30について説明する。第1吐出機構30は、基板2に向けてめっき液を吐出するための第1吐出部33を有している。図2に示す例において、第1吐出部33は、基板2に向けてめっき液を吐出する吐出口が設けられた吐出ヘッドとして構成されている。この場合、第1吐出部33内には、めっき液供給機構71から供給されためっき液を吐出口に導くための配管や、めっき液を保温するための熱媒を循環させるための配管などが収納されている。
次に第2吐出機構40について説明する。第2吐出機構40は、基板2に向けて処理液などを吐出する第2吐出部43を有している。第2吐出部43は、上下方向および水平方向に移動可能となるよう構成されている。例えば第1吐出部33の場合と同様に、第2吐出部43は、アーム42の先端部に取り付けられており、このアーム42は、上下方向に延伸可能であるとともに回転機構166により回転駆動される支持軸41に固定されている。
次にトッププレート21について説明する。トッププレート21は、基板2の周囲雰囲気がめっき処理装置20の内部に拡散されることを防ぐためのものである。このようなトッププレート21を用いることにより、基板2の周囲雰囲気に含まれる様々な物質がめっき処理装置20の構成要素に付着し、これによってパーティクルが発生してしまうことを防ぐことができる。また後述するように、基板2の周囲の気体が流動することを抑制することができ、これによって、基板2周囲の雰囲気の熱が外方に逃げてしまうことを抑制することができる。
本実施の形態において、めっき処理システム1およびめっき処理装置20は、記憶媒体161に記録されためっき処理プログラムに従って、基板2にめっき処理を施すよう駆動制御される。以下の説明では、一のめっき処理装置20において、基板2に向けてCoWBめっき液を吐出し、これによって基板2の表面にCoWBめっき層を形成する方法について、図7A(a)(b)~図7D(a)(b)および図8を参照して説明する。図7A(a)(b)~図7D(a)(b)において、(a)に示される図は、側方から見た場合のトッププレート21や吐出機構30,40などを表しており、(b)に示される図は、上方から見た場合のトッププレート21や吐出機構30,40などを表している。
まず、基板搬送ユニット13の基板搬送装置14を用いて、1枚の基板2を基板受渡室11からめっき処理装置20に搬入する。
次に、めっき工程の前に基板2に向けてDIWなどのリンス処理液を吐出する、いわゆるプリウェット工程を実施する。この場合、はじめに図7B(a)に示すように、駆動機構167によってトッププレート21を、第3位置よりも下方の第2位置まで下降させる。第2位置において、基板2とトッププレート21との間の距離h2は例えば20mmとなっている。次に基板保持機構110によって基板2を回転させ、また、図7B(b)に示すように、第2吐出機構40の第2吐出部43を回転方向R2に沿って待機位置から吐出位置へ水平移動させる。その後、第2吐出部43を基板2の中心部から基板2の周縁部へ水平方向に移動させながら、若しくは、第2吐出部43を基板2の周縁部から基板2の中心部へ水平方向に移動させながら、基板2の表面に向けて第2吐出部43の第1吐出口44からリンス処理液48を吐出する。基板2から飛散されたリンス処理液48は、排液カップ120の第2開口部126を介して第2排液機構127によって排出される。
若しくは、基板2の凹部2aには、液滴48aの運動エネルギーに起因する物理エネルギーが伝達する。このため、従来のように基板2の回転に起因する遠心力によってのみリンス処理液48が各凹部2aに到達する場合に比べて、凹部2aの隅々にまでリンス処理液48を行き渡らせることができる。
次に、基板2に向けて第1吐出機構30からめっき液を吐出するめっき工程を実施する。このめっき工程は、好ましくは、基板2上にリンス処理液48が残っている間に開始される。このように、基板2が乾燥していない状態でめっき工程を開始することで、基板2の被めっき面が酸化してしまい良好にめっき処理できなくなることを防止することができる。
次に、基板2に向けてDIWなどのリンス処理液を供給するリンス処理工程を実施する。この場合、はじめに図7D(a)に示すように、駆動機構167によってトッププレート21を第2位置まで上昇させる。また、排液カップ120の第2開口部126と基板2の外周端縁とが対向する位置まで排液カップ120を上昇させる。その後、基板2に向けて第1吐出口44からリンス処理液48を吐出する。この際、好ましくは図7D(b)に示すように、第2吐出部43を基板2の中心部から基板2の周縁部へ水平方向に移動させながら、若しくは、第2吐出部43を基板2の周縁部から基板2の中心部へ水平方向に移動させながら、基板2の表面に向けて第2吐出部43の第1吐出口44からリンス処理液48を吐出する。これによって、凹部2aの隅々にまでリンス処理液48を行き渡らせることができる。基板2から飛散されたリンス処理液48は、排液カップ120の第2開口部126を介して第2排液機構127によって排出される。
次に、基板2に向けてIPAなどの乾燥処理液を吐出する乾燥処理工程を実施する。例えば、第2吐出部43を基板2の中心部から基板2の周縁部へ水平方向に移動させながら、若しくは、第2吐出部43を基板2の周縁部から基板2の中心部へ水平方向に移動させながら、基板2の表面に向けて第2吐出部43の第3吐出口46からIPAを吐出する。この際、トッププレート21に形成された第2吐出口27から基板2に向けてドライエアを吐出してもよい。これによって、基板2の乾燥を促進することができる。なお乾燥工程において、トッププレート21は、上述の第2位置に配置されていてもよく、若しくは、第3位置などのその他の位置に配置されていてもよい。
以下、本実施の形態の各変形例について説明する。
20 めっき処理装置
21 トッププレート
22 開口部
30 第1吐出機構
33 第1吐出部
110 基板保持機構
Claims (18)
- 基板にめっき液を供給してめっき処理を行うめっき処理装置において、
前記基板を保持して回転させる基板保持機構と、
前記基板保持機構に保持された基板に向けてめっき液を吐出する第1吐出機構と、
基板の上方に配置され、開口部が形成されたトッププレートと、を備え、
前記第1吐出機構は、基板に向けてめっき液を吐出する第1吐出部を有し、
前記第1吐出部は、めっき液を吐出する際に位置する吐出位置と、めっき液を吐出しない際に位置する待機位置と、の間で移動可能となっており、
前記第1吐出部は、前記吐出位置にある際に前記トッププレートの前記開口部と重なるよう構成されていることを特徴とするめっき処理装置。 - 前記トッププレートにヒーターが設けられていることを特徴とする請求項1に記載のめっき処理装置。
- 前記トッププレートの前記開口部は、前記トッププレートの中心部から前記トッププレートの外周端縁に向かって延びるよう形成されており、
前記第1吐出機構の前記第1吐出部は、基板の半径方向に沿って並べられ、基板に向けてめっき液を吐出する複数の吐出口を含む、または、基板の半径方向に沿って延びる吐出口を含むことを特徴とする請求項1または2に記載のめっき処理装置。 - 前記基板保持機構に保持された基板に向けて処理液を吐出する第2吐出機構をさらに備え、
前記第2吐出機構は、基板に向けて処理液を吐出する第2吐出部を有する、請求項1乃至3のいずれか一項に記載のめっき処理装置。 - 前記第2吐出機構の前記第2吐出部は、処理液を吐出しながら水平方向に移動可能となるよう構成されていることを特徴とする請求項4に記載のめっき処理装置。
- 前記トッププレートは、第1位置と、第1位置よりも上方の第2位置との間で移動可能となるよう構成されており、
前記第1吐出機構が基板に向けてめっき液を吐出するとき、前記トッププレートは前記第1位置に配置され、前記第2吐出機構が基板に向けて処理液を吐出するとき、前記トッププレートは前記第2位置に配置されることを特徴とする請求項4または5に記載のめっき処理装置。 - 前記トッププレートに、基板に向けて処理液を吐出する処理液吐出口が形成されていることを特徴とする請求項1乃至6のいずれか一項に記載のめっき処理装置。
- 基板にめっき液を供給してめっき処理を行うめっき処理方法において、
基板保持機構によって基板を保持する工程と、
基板の上方に、開口部が形成されたトッププレートを配置する工程と、
基板に向けて前記開口部からめっき液を吐出するめっき工程と、を備え、
前記めっき工程の際、前記トッププレートの前記開口部から前記基板へ向かう気体の流れが阻害されることを特徴とするめっき処理方法。 - 前記めっき工程において、第1吐出部から基板に向けてめっき液が吐出され、
前記第1吐出部は、めっき液を吐出する際に前記トッププレートの前記開口部と重なるよう構成されていることを特徴とする請求項8に記載のめっき処理方法。 - 前記トッププレートにヒーターが設けられていることを特徴とする請求項8または9に記載のめっき処理方法。
- 前記トッププレートの前記開口部は、前記トッププレートの中心部から前記トッププレートの外周端縁に向かって延びるよう形成され、
前記めっき工程において、第1吐出部から基板に向けてめっき液が吐出され、
前記第1吐出部は、基板の半径方向に沿って並べられ、基板に向けてめっき液を吐出する複数の吐出口を含む、または、基板の半径方向に沿って延びる吐出口を含むことを特徴とする請求項8乃至10のいずれか一項に記載のめっき処理方法。 - 基板に向けて第2吐出部から処理液を吐出する処理液吐出工程をさらに備えたことを特徴とする請求項8乃至11のいずれか一項に記載のめっき処理方法。
- 前記処理液吐出工程において、前記第2吐出部は、水平方向に移動しながら処理液を吐出することを特徴とする請求項12に記載のめっき処理方法。
- 前記処理液吐出工程の際に前記トッププレートの前記開口部を通る気体の流量が、前記めっき工程の際に前記トッププレートの前記開口部を通る気体の流量よりも大きくなっていること特徴とする請求項12または13に記載のめっき処理方法。
- 前記トッププレートは、第1位置と、第1位置よりも上方の第2位置との間で移動可能となるよう構成されており、
前記めっき工程において、前記トッププレートは前記第1位置に配置され、前記処理液吐出工程において、前記トッププレートは前記第2位置に配置されることを特徴とする請求項12乃至14のいずれか一項に記載のめっき処理方法。 - 前記トッププレートに、基板に向けて処理液を吐出する処理液吐出口が形成されており、
前記めっき処理方法は、前記めっき工程の後、前記トッププレートが前記第1位置に配置されたままの状態で、基板に向けて前記トッププレートの前記処理液吐出口から処理液を吐出するリンス処理工程をさらに備えたことを特徴とする請求項15に記載のめっき処理方法。 - 前記第2吐出部は、基板に向けて処理液を吐出する第1吐出口と、基板に向けてめっき液を吐出する第2吐出口と、を含み、
前記処理液吐出工程は、前記めっき工程の前に基板に向けて前記第2吐出部の前記第1吐出口から処理液を吐出するプリウェット工程を含み、
前記めっき工程は、前記プリウェット工程の後に基板に向けて前記第2吐出部の前記第2吐出口からめっき液を吐出する第1めっき工程と、前記第1めっき工程の後に基板に向けて前記第1吐出部からめっき液を吐出する第2めっき工程と、含むことを特徴とする請求項12乃至16のいずれか一項に記載のめっき処理方法。 - めっき処理装置にめっき処理方法を実行させるためのコンピュータプログラムを格納した記憶媒体において、
前記めっき処理方法は、
基板保持機構によって基板を保持する工程と、
基板の上方に、開口部が形成されたトッププレートを配置する工程と、
基板に向けて前記開口部からめっき液を吐出するめっき工程と、を備え、
前記めっき工程の際、前記トッププレートの前記開口部から前記基板へ向かう気体の流れが阻害される、方法からなっていることを特徴とする記憶媒体。
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