WO2021085165A1 - 基板液処理方法および基板液処理装置 - Google Patents
基板液処理方法および基板液処理装置 Download PDFInfo
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- WO2021085165A1 WO2021085165A1 PCT/JP2020/039018 JP2020039018W WO2021085165A1 WO 2021085165 A1 WO2021085165 A1 WO 2021085165A1 JP 2020039018 W JP2020039018 W JP 2020039018W WO 2021085165 A1 WO2021085165 A1 WO 2021085165A1
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- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
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- 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
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- 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
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- 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
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- C23C18/1632—Features specific for the apparatus, e.g. layout of cells and of its equipment, multiple cells
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- 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
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
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- 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
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- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/687—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
- H01L21/68742—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by a lifting arrangement, e.g. lift pins
Definitions
- the present disclosure relates to a substrate liquid treatment method and a substrate liquid treatment apparatus.
- Patent Document 1 discloses a substrate liquid treatment apparatus that performs electroless plating treatment on a substrate (wafer) using a treatment liquid composed of a plating liquid.
- the present disclosure provides a technique for improving the uniformity of a plating film in the substrate surface in an electroless plating process.
- the substrate liquid treatment method is a substrate liquid treatment method in which a plating solution is supplied to a substrate to liquidate the substrate, and the step of holding the substrate by a substrate holding portion and the substrate A step of supplying the plating solution to the upper surface, a step of covering the substrate with a lid arranged above the held substrate and having a ceiling portion, and a step of covering the substrate with the lid, at least the lid.
- the step of heating the plating solution which includes a step of heating the plating solution on the substrate by a heating portion provided on either the body or the substrate holding portion, at least the lid body and the substrate are used.
- One of the holding portions is moved up and down to perform a gas discharge operation for pushing out the reaction gas staying between the lid and the substrate.
- the uniformity of the plating film is improved in the substrate surface in the electroless plating treatment.
- FIG. 1 is a schematic view showing a configuration of a plating processing apparatus as an example of the substrate liquid processing apparatus according to the embodiment of the present disclosure.
- FIG. 2 is a cross-sectional view showing the configuration of the plating-processed portion shown in FIG.
- FIG. 3 is a plan sectional view showing the nozzle arm and the lid of FIG.
- FIG. 4 is a flowchart showing a plating process of a substrate in the plating process apparatus of FIG.
- FIG. 5A is a diagram for explaining the substrate holding process of FIG.
- FIG. 5B is a diagram for explaining the plating solution filling process of FIG.
- FIG. 5C is a diagram for explaining the plating solution heat treatment step of FIG.
- FIG. 5D is a diagram for explaining the switching of the lowering speed of the lid body of FIG.
- FIG. 5E is a diagram for explaining the heating process of FIG.
- FIG. 5F is a diagram for explaining the substrate drying process of FIG.
- FIG. 1 is a schematic view showing a configuration of a plating processing apparatus as an example of the substrate liquid processing apparatus according to the embodiment of the present disclosure.
- the plating processing apparatus is an apparatus for supplying a plating solution L1 (processing solution) to the substrate W to perform a plating process (liquid treatment) on the substrate W.
- the plating processing apparatus 1 includes a plating processing unit 2 and a control unit 3 for controlling the operation of the plating processing unit 2.
- the plating processing unit 2 performs various processing on the substrate W (wafer). Various treatments performed by the plating processing unit 2 will be described later.
- the control unit 3 is, for example, a computer, and has an operation control unit and a storage unit.
- the operation control unit is composed of, for example, a CPU (Central Processing Unit), and controls the operation of the plating processing unit 2 by reading and executing a program stored in the storage unit.
- the storage unit is composed of storage devices such as a RAM (Random Access Memory), a ROM (Read Only Memory), and a hard disk, and stores programs that control various processes executed in the plating processing unit 2.
- the program may be recorded on a recording medium 31 that can be read by a computer, or may be installed in a storage unit from the recording medium 31.
- Examples of the recording medium 31 that can be read by a computer include a hard disk (HD), a flexible disk (FD), a compact disk (CD), a magnet optical disk (MO), a memory card, and the like.
- the recording medium 31 records, for example, a program in which the computer controls the plating processing device 1 to execute the plating processing method described later when executed by a computer for controlling the operation of the plating processing device 1. ..
- the configuration of the plating processing unit 2 will be described with reference to FIG.
- the plating processing unit 2 has a loading / unloading station 21 and a processing station 22 provided adjacent to the loading / unloading station 21.
- the loading / unloading station 21 includes a mounting unit 211 and a transport unit 212 provided adjacent to the mounting unit 211.
- a plurality of transport containers (hereinafter referred to as "carrier C") for accommodating a plurality of substrates W in a horizontal state are mounted on the mounting portion 211.
- the transport unit 212 includes a transport mechanism 213 and a delivery unit 214.
- the transport mechanism 213 includes a holding mechanism for holding the substrate W, and is configured to be capable of moving in the horizontal direction and the vertical direction and turning around the vertical axis.
- the processing station 22 includes a plurality of plating processing units 5.
- the number of plating processing units 5 included in the processing station 22 is two or more, but may be one.
- the plurality of plating processing units 5 are arranged on both sides of the transport path 221 extending in a predetermined direction (both sides in a direction orthogonal to the moving direction of the transport mechanism 222 described later).
- the transport path 221 is provided with a transport mechanism 222.
- the transport mechanism 222 includes a holding mechanism for holding the substrate W, and is configured to be capable of moving in the horizontal direction and the vertical direction and turning around the vertical axis.
- the transport mechanism 213 of the carry-in / out station 21 transports the substrate W between the carrier C and the delivery unit 214. Specifically, the transport mechanism 213 takes out the substrate W from the carrier C mounted on the mounting portion 211, and mounts the taken out substrate W on the delivery portion 214. Further, the transport mechanism 213 takes out the substrate W mounted on the delivery portion 214 by the transport mechanism 222 of the processing station 22, and accommodates the substrate W in the carrier C of the mounting portion 211.
- the transfer mechanism 222 of the processing station 22 transfers the substrate W between the delivery unit 214 and the plating processing unit 5, and between the plating processing unit 5 and the delivery unit 214. Specifically, the transport mechanism 222 takes out the substrate W placed on the delivery section 214, and carries the taken-out substrate W into the plating processing section 5. Further, the transport mechanism 222 takes out the substrate W from the plating processing unit 5, and places the taken out substrate W on the delivery unit 214.
- FIG. 2 is a schematic cross-sectional view showing the configuration of the plating processing unit 5.
- the plating processing unit 5 is configured to perform liquid treatment including electroless plating treatment.
- the plating processing unit 5 is arranged on the chamber 51, the substrate holding unit 52 which is arranged in the chamber 51 and holds the substrate W horizontally, and the plating solution L1 (processing liquid L1) on the upper surface of the substrate W held by the substrate holding unit 52. ) Is provided with a plating solution supply unit 53 (treatment liquid supply unit).
- the substrate holding portion 52 has a chuck member 521 that vacuum-adsorbs the lower surface (back surface) of the substrate W.
- the chuck member 521 is a so-called vacuum chuck type.
- the substrate holding portion 52 may be a so-called mechanical chuck type in which the outer edge portion of the substrate W is gripped by a chuck mechanism or the like. Further, the substrate holding portion 52 may have a substrate holding portion elevating mechanism (not shown) for operating the substrate holding portion 52 in the vertical direction.
- a substrate holding portion elevating mechanism an actuator including a cylinder or a motor and a ball screw may be used.
- a rotary motor 523 (rotation drive section) is connected to the board holding section 52 via a rotary shaft 522.
- the rotary motor 523 is driven, the substrate holding portion 52 rotates together with the substrate W.
- the rotary motor 523 is supported by a base 524 fixed to the chamber 51.
- the plating solution supply unit 53 is provided on the plating solution nozzle 531 (treatment solution nozzle) for discharging (supplying) the plating solution L1 to the substrate W held by the substrate holding unit 52 and the plating solution nozzle 531. It has a plating solution supply source 532 for supplying the plating solution L1.
- the plating solution supply source 532 is configured to supply the plating solution L1 heated or temperature-controlled to a predetermined temperature to the plating solution nozzle 531.
- the temperature at the time of discharging the plating solution L1 from the plating solution nozzle 531 is, for example, 55 ° C. or higher and 75 ° C. or lower, and more preferably 60 ° C. or higher and 70 ° C. or lower.
- the plating solution nozzle 531 is held by the nozzle arm 56 and is configured to be movable.
- the plating solution L1 is a plating solution for autocatalytic (reduction type) electroless plating.
- the plating solution L1 contains, for example, metal ions such as cobalt (Co) ion, nickel (Ni) ion, tungsten (W) ion, copper (Cu) ion, palladium (Pd) ion, and gold (Au) ion, and hypophosphorous acid. Contains a reducing agent such as phosphoric acid and dimethylamine borane.
- the plating solution L1 may contain additives and the like. Examples of the plating film P (metal film, see FIG. 5F) formed by the plating treatment using the plating solution L1 include CoWB, CoB, CoWP, CoWBP, NiWB, NiB, NiWP, NiWBP and the like.
- the plating processing unit 5 has, as other processing liquid supply units, a cleaning liquid supply unit 54 that supplies the cleaning liquid L2 to the upper surface of the substrate W held by the substrate holding unit 52, and a rinse on the upper surface of the substrate W.
- a rinse liquid supply unit 55 for supplying the liquid L3 is further provided.
- the cleaning liquid supply unit 54 has a cleaning liquid nozzle 541 that discharges the cleaning liquid L2 to the substrate W held by the substrate holding unit 52, and a cleaning liquid supply source 542 that supplies the cleaning liquid L2 to the cleaning liquid nozzle 541.
- the cleaning liquid L2 includes, for example, organic acids such as formic acid, malic acid, succinic acid, citric acid, and malonic acid, and hydrofluoric acid (DHF) diluted to a concentration that does not corrode the surface to be plated of the substrate W. An aqueous solution of hydrofluoric acid) or the like can be used.
- the cleaning liquid nozzle 541 is held by the nozzle arm 56 and can move together with the plating liquid nozzle 531.
- the rinse liquid supply unit 55 includes a rinse liquid nozzle 551 that discharges the rinse liquid L3 to the substrate W held by the substrate holding unit 52, and a rinse liquid supply source 552 that supplies the rinse liquid L3 to the rinse liquid nozzle 551. doing.
- the rinse liquid nozzle 551 is held by the nozzle arm 56 and can move together with the plating liquid nozzle 531 and the cleaning liquid nozzle 541.
- the rinsing liquid L3 for example, pure water (deionized water) or the like can be used.
- a nozzle moving mechanism (not shown) is connected to the nozzle arm 56 that holds the plating liquid nozzle 531, the cleaning liquid nozzle 541, and the rinse liquid nozzle 551 described above.
- This nozzle moving mechanism moves the nozzle arm 56 in the horizontal direction and the vertical direction. More specifically, as shown in FIG. 3, by the nozzle moving mechanism, the nozzle arm 56 has a discharge position (a position indicated by a two-dot chain line in FIG. 3) and a retracted position retracted from the discharge position (solid line in FIG. 3). It is possible to move to and from the position indicated by).
- the discharge position is a position where the treatment liquid (plating liquid L1, cleaning liquid L2, or rinse liquid L3) is discharged to the substrate W.
- the discharge position is not particularly limited as long as the processing liquid can be supplied to an arbitrary position on the upper surface of the substrate W.
- the ejection position of the nozzle arm 56 may be different depending on whether the plating liquid L1 is supplied to the substrate W, the cleaning liquid L2 is supplied, or the rinse liquid L3 is supplied.
- the retracted position is a position in the chamber 51 that does not overlap the substrate W when viewed from above, and is a position away from the discharge position. When the nozzle arm 56 is positioned in the retracted position, it is possible to prevent the moving lid 6 from interfering with the nozzle arm 56.
- a cup 571 is provided around the substrate holding portion 52.
- the cup 571 is formed in a ring shape when viewed from above, and receives the processing liquid scattered from the substrate W when the substrate W rotates, and guides the cup 571 to a drain duct 581 described later.
- An atmosphere blocking cover 572 is provided on the outer peripheral side of the cup 571 to prevent the atmosphere around the substrate W from diffusing into the chamber 51.
- the atmosphere blocking cover 572 is formed in a cylindrical shape so as to extend in the vertical direction, and the upper end is open. A lid 6 to be described later can be inserted into the atmosphere blocking cover 572 from above.
- a drain duct 581 is provided below the cup 571.
- the drain duct 581 is formed in a ring shape when viewed from above, and receives and discharges the treatment liquid that has been received by the cup 571 and lowered, and the treatment liquid that has directly descended from the periphery of the substrate W.
- An inner cover 582 is provided on the inner peripheral side of the drain duct 581. The inner cover 582 is arranged above the cooling plate 525 to prevent the treatment liquid and the atmosphere around the substrate W from diffusing.
- a guide member 583 that guides the treatment liquid to the drain duct 581 is provided above the exhaust pipe 81, which will be described later. The guide member 583 is configured to prevent the processing liquid descending above the exhaust pipe 81 from entering the exhaust pipe 81 and to be received by the drain duct 581.
- the substrate W held by the substrate holding portion 52 is covered with the lid body 6.
- the lid 6 has a ceiling portion 61 and a side wall portion 62 extending downward from the ceiling portion 61.
- the ceiling portion 61 is arranged above the substrate W held by the substrate holding portion 52 and is placed on the substrate W. On the other hand, they face each other at a relatively small interval.
- the ceiling portion 61 includes a first ceiling plate 611 and a second ceiling plate 612 provided on the first ceiling plate 611.
- a heater 63 (heating unit), which will be described later, is interposed between the first ceiling plate 611 and the second ceiling plate 612.
- the first ceiling plate 611 and the second ceiling plate 612 are configured to seal the heater 63 so that the heater 63 does not come into contact with a treatment liquid such as the plating liquid L1.
- a seal ring 613 is provided between the first ceiling plate 611 and the second ceiling plate 612 on the outer peripheral side of the heater 63, and the heater 63 is sealed by the seal ring 613. ..
- the first ceiling plate 611 and the second ceiling plate 612 are preferably corrosive to a treatment liquid such as the plating liquid L1, and may be formed of, for example, an aluminum alloy.
- a treatment liquid such as the plating liquid L1
- the first ceiling plate 611, the second ceiling plate 612 and the side wall portion 62 may be coated with Teflon (registered trademark).
- a lid moving mechanism 7 is connected to the lid 6 via a lid arm 71.
- the lid moving mechanism 7 moves the lid 6 in the horizontal direction and the vertical direction.
- the lid moving mechanism 7 includes a swivel motor 72 that moves the lid 6 in the horizontal direction, and a cylinder 73 that moves the lid 6 in the vertical direction.
- the swivel motor 72 is mounted on a support plate 74 provided so as to be movable in the vertical direction with respect to the cylinder 73.
- an actuator (not shown) including a motor and a ball screw may be used.
- the swivel motor 72 of the lid moving mechanism 7 has the lid 6 placed above the substrate W held by the substrate holding portion 52 (indicated by a two-dot chain line in FIG. 3).
- the position) and the retracted position (the position shown by the solid line in FIG. 3) retracted from the upper position are moved.
- the upper position is a position facing the substrate W held by the substrate holding portion 52 at a relatively large interval, and is a position overlapping the substrate W when viewed from above.
- the retracted position is a position in the chamber 51 that does not overlap the substrate W when viewed from above.
- the moving nozzle arm 56 is prevented from interfering with the lid 6.
- the rotation axis of the swivel motor 72 extends in the vertical direction, and the lid 6 can swivel and move in the horizontal direction between the upper position and the retracted position.
- the cylinder 73 of the lid moving mechanism 7 moves the lid 6 in the vertical direction, and the distance between the substrate W to which the plating solution L1 is supplied and the first ceiling plate 611 of the ceiling portion 61.
- the lid body 6 is placed at the first spacing position (see FIG. 5C), the second spacing position (see FIG. 5D), and the above-mentioned upper position (position indicated by the alternate long and short dash line in FIG. 2). ) And.
- the spacing between the substrate W and the first ceiling plate 611 is the smallest first spacing g1 (see FIG. 5C), and the first ceiling plate 611 is closest to the substrate W.
- the first interval g1 may be set so that the first ceiling plate 611 does not come into contact with the plating solution L1 on the substrate W. Suitable.
- the spacing between the substrate W and the first ceiling plate 611 is the second spacing g2 (see FIG. 5D), which is larger than the first spacing g1.
- the lid body 6 is positioned above the first spacing position.
- the upper position is a height position at which the lid 6 can be prevented from interfering with surrounding structures such as the cup 571 and the atmosphere blocking cover 572 when the lid 6 is swiveled in the horizontal direction. ing.
- the lid 6 can be moved by the cylinder 73 between the first interval position, the second interval position, and the upper position.
- the distance between the substrate W and the first ceiling plate 611 can be adjusted to the first distance g1 and the second distance g2.
- the side wall portion 62 of the lid 6 extends downward from the peripheral edge portion of the first ceiling plate 611 of the ceiling portion 61, and when heating the plating solution L1 on the substrate W (first interval).
- the lid 6 is positioned at the position and the second interval position
- it is arranged on the outer peripheral side of the substrate W.
- the lower end 621 of the side wall portion 62 is positioned at a position lower than the substrate W.
- the vertical distance x1 between the lower end 621 of the side wall portion 62 and the lower surface of the substrate W is preferably, for example, 10 to 30 mm.
- a heater 63 is provided on the ceiling portion 61 of the lid body 6.
- the heater 63 heats the treatment liquid (preferably the plating liquid L1) on the substrate W when the lid 6 is positioned at the first interval position and the second interval position.
- the heater 63 is interposed between the first ceiling plate 611 and the second ceiling plate 612 of the lid body 6.
- the heater 63 is sealed as described above to prevent it from coming into contact with a treatment liquid such as the plating liquid L1.
- the ceiling portion 61 and the side wall portion 62 of the lid body 6 are covered with the lid body cover 64.
- the lid cover 64 is placed on the second ceiling plate 612 of the lid 6 via a support portion 65. That is, a plurality of support portions 65 projecting upward from the upper surface of the second ceiling plate 612 are provided on the second ceiling plate 612, and the lid cover 64 is placed on the support portions 65.
- the lid cover 64 can be moved in the horizontal direction and the vertical direction together with the lid 6.
- the lid cover 64 preferably has a higher heat insulating property than the ceiling portion 61 and the side wall portion 62 in order to prevent heat in the lid body 6 from escaping to the surroundings.
- the lid cover 64 is preferably made of a resin material, and it is even more preferable that the resin material has heat resistance.
- a fan filter unit 59 (gas supply unit) that supplies clean air (gas) around the lid 6 is provided above the chamber 51.
- the fan filter unit 59 supplies air into the chamber 51 (particularly, inside the atmosphere blocking cover 572), and the supplied air flows toward the exhaust pipe 81 described later.
- a downflow through which this air flows downward is formed around the lid 6, and the gas vaporized from the treatment liquid such as the plating liquid L1 flows toward the exhaust pipe 81 by this downflow. In this way, the vaporized gas from the treatment liquid is prevented from rising and diffusing into the chamber 51.
- the amount of gas supplied by the fan filter unit 59 when the plating solution L1 on the substrate W is heated by the heater 63 is smaller than that when the plating solution L1 is supplied on the substrate W. It is configured in. More specifically, when the lid 6 is positioned at the first spacing position, the amount of air supplied by the fan filter unit 59 is higher than when the lid 6 is positioned at the retracted position or the upper position. It is decreasing.
- the exhaust mechanism 8 has two exhaust pipes 81 provided below the cup 571 and an exhaust duct 82 provided below the drain duct 581. Two of these exhaust pipes 81 penetrate the bottom of the drain duct 581 and communicate with the exhaust duct 82, respectively.
- the exhaust duct 82 is formed substantially in a semicircular ring shape when viewed from above. In the present embodiment, one exhaust duct 82 is provided below the drain duct 581, and two exhaust pipes 81 communicate with the exhaust duct 82.
- the plating treatment method carried out by the plating treatment apparatus 1 includes a plating treatment for the substrate W.
- the plating process is performed by the plating process unit 5.
- the operation of the plating processing unit 5 shown below is controlled by outputting a control signal by the control unit 3.
- the substrate W is carried into the plating processing unit 5, and the carried-in substrate W is held by the substrate holding unit 52 as shown in FIG. 5A (step S1).
- the lower surface of the substrate W is vacuum-sucked, and the substrate W is horizontally held by the substrate holding portion 52.
- step S2 the substrate W held by the substrate holding portion 52 is cleaned (step S2).
- the rotation motor 523 is driven to rotate the substrate W at a predetermined rotation speed.
- the nozzle arm 56 positioned at the retracted position moves to the ejection position (the position indicated by the alternate long and short dash line in FIG. 3).
- the cleaning liquid L2 is supplied from the cleaning liquid nozzle 541 to the rotating substrate W to clean the surface of the substrate W. As a result, deposits and the like adhering to the substrate W are removed from the substrate W.
- the cleaning liquid L2 supplied to the substrate W is discharged to the drain duct 581.
- the cleaned substrate W is rinsed (step S3).
- the rinsing liquid L3 is supplied from the rinsing liquid nozzle 551 to the rotating substrate W, and the surface of the substrate W is rinsed. As a result, the cleaning liquid L2 remaining on the substrate W is washed away.
- the rinse liquid L3 supplied to the substrate W is discharged to the drain duct 581.
- the plating solution L1 is supplied and served on the rinsed substrate W (step S4).
- the rotation speed of the substrate W is reduced to be lower than the rotation speed during the rinsing process.
- the rotation speed of the substrate W may be 50 to 150 rpm.
- the plating film P which will be described later, formed on the substrate W can be made uniform.
- the rotation of the substrate W may be stopped in order to increase the amount of the plating solution L1.
- the plating solution L1 is discharged from the plating solution nozzle 531 to the upper surface of the substrate W.
- the discharged plating solution L1 stays on the upper surface of the substrate W due to surface tension, and the plating solution is placed on the upper surface of the substrate W to form a layer (so-called paddle) of the plating solution L1.
- a part of the plating solution L1 flows out from the upper surface of the substrate W and is discharged from the drain duct 581. After a predetermined amount of the plating solution L1 is discharged from the plating solution nozzle 531, the discharge of the plating solution L1 is stopped.
- the nozzle arm 56 which was positioned at the discharge position, is positioned at the retracted position.
- plating liquid heat treatment process Next, as a plating solution heat treatment step, the plating solution L1 placed on the substrate W is heated.
- Step S6 Even in the heating step, it is preferable that the rotation speed of the substrate W is maintained at the same speed (or rotation stop) as in the plating solution filling step.
- the rotation speed of the substrate W in the heating step may be repeatedly stopped and rotated at a low speed (for example, 20 rpm). As a result, the plating film P can be formed more uniformly by stirring the plating solution L1.
- the substrate W is covered with the lid 6 (step S5).
- the swivel motor 72 of the lid moving mechanism 7 is driven, and the lid 6 positioned at the retracted position (the position shown by the solid line in FIG. 3) swivels in the horizontal direction and moves to the upper position (the position shown by the solid line in FIG. 3). It is positioned at the position shown by the solid line in FIG.
- the cylinder 73 of the lid moving mechanism 7 is driven, and the lid 6 positioned at the upper position is lowered to be positioned at the first interval position.
- the distance between the substrate W and the first ceiling plate 611 of the lid 6 is the first interval g1
- the side wall portion 62 of the lid 6 is arranged on the outer peripheral side of the substrate W.
- the lower end 621 of the side wall portion 62 of the lid 6 is positioned at a position lower than the lower surface of the substrate W. In this way, the substrate W is covered with the lid 6, and the space around the substrate W is closed.
- the descending speed of the lid is controlled to slow down the descending speed of the lid in accordance with the decrease in the gap between the lid and the substrate.
- the lid moving mechanism 7 has a second spacing position g2 (for example, a position 5 mm from the surface of the substrate W) between the upper position of the lid and the first spacing position (for example, a position 5 mm from the surface of the substrate W). It has a position of 30 mm from the surface of the substrate W).
- the lowering speed of the lid 6 is between the second interval position and the first interval position (second interval g2) than the first descending speed (for example, 75 mm / sec) between the upper position and the second interval position g2. ) Is controlled so that the second descending speed (for example, 30 mm / sec) is slower.
- the lid 6 can be brought close to the substrate W in a short time without spilling the plating solution L1 on the substrate W, and the temperature of the plating solution L1 on the substrate W can be rapidly raised to reduce the processing time. It is possible to shorten the time and make the liquid treatment in the plane of the substrate W uniform.
- step S6 the plating solution L1 placed on the substrate W is heated.
- the heating of the plating solution L1 in the heating step is performed for a predetermined time set so that the temperature of the plating solution L1 rises to a predetermined temperature.
- the temperature of the plating solution L1 rises to a temperature at which the components are precipitated, the components of the plating solution L1 are precipitated on the upper surface of the substrate W, and the plating film P begins to be formed.
- a reaction gas (hydrogen, etc.) is generated in the plating solution L1 as the plating film grows.
- the reaction gas generated from the plating solution L1 gradually stays between the substrate W and the lid 6, and the reaction gas concentration at the center of the substrate W increases in the plane of the substrate W.
- concentration of the reaction gas in the plating solution L1 in the central portion becomes high in the plane of the substrate W, the precipitation of the plating component is promoted, the plating film becomes thick, and the plating film on the outer peripheral portion of the substrate W becomes thin. As a result, a non-uniform plating film is formed on the substrate W.
- a gas discharge operation is performed in the heating step.
- the gas discharge operation at least one of the lid moving mechanism 7 for moving the lid 6 and the substrate holding portion elevating mechanism (not shown) for raising and lowering the substrate holding portion 52 is moved up and down to move the lid 6 and the substrate W. It is an operation that pushes out the reaction gas that stays between the two.
- the reaction gas concentration accumulated between the substrate W and the lid 6 can be dispersed. This makes it possible to prevent the reaction gas concentration from increasing in the central portion of the substrate W.
- the plating components can be uniformly deposited in the plane of the substrate W, and a uniform plating film can be formed.
- the gas discharge operation will be explained in detail.
- the cylinder 73 of the lid moving mechanism 7 is driven from the state where the lid 6 is positioned at the first interval position g1, and the lid 6 is moved as shown in FIG. 5E. It is positioned at the third spacing position g3 (for example, a position 10 mm from the surface of the substrate W).
- the cylinder 73 of the lid moving mechanism 7 is driven again to position the lid 6 from the third spacing position g3 to the first spacing position g1.
- the ascending and descending speeds of the lid 6 are performed at, for example, 70 mm / sec.
- the lid 6 By moving the lid 6 up and down in this way, the reaction gas staying between the substrate W and the lid 6 is dispersed, so that the reaction gas concentration is prevented from increasing in the central portion of the substrate W. be able to. As a result, the plating components can be uniformly deposited in the plane of the substrate W, and a uniform plating film can be formed.
- the gas discharge operation may be performed a plurality of times in heating the plating solution L1 on the substrate W.
- the uniformity of the plating film on the substrate W can be improved by increasing the number of gas discharge operations depending on the characteristics of the plating solution L1 and the required film thickness of the plating film.
- the gas discharge operation may be performed so that the substrate W is not exposed between the lower surface of the ceiling portion 61 and the lower end 621 of the side wall portion 62. As a result, it is possible to prevent the surface of the substrate W from being exposed to the external atmosphere of the lid body 6 and prevent the plating film on the substrate W from being oxidized.
- the lid moving mechanism 7 is driven to position the lid 6 in the retracted position (step S7).
- the cylinder 73 of the lid moving mechanism 7 is driven, and the lid 6 positioned at the second interval position rises and is positioned at the upper position.
- the swivel motor 72 of the lid moving mechanism 7 is driven, and the lid 6 positioned at the upper position swivels in the horizontal direction and is positioned at the retracted position.
- step S4 When the lid 6 rises from the first interval position, the amount of air supplied from the fan filter unit 59 is increased to return to the amount of air supplied in the plating solution filling step (step S4). This makes it possible to increase the flow rate of the air flowing around the substrate W and prevent the vaporized gas from rising and diffusing from the plating solution L1.
- step S5 and S6 of the substrate W is completed.
- the substrate W that has been heat-treated with the plating solution is rinsed (step S8).
- the rotation speed of the substrate W is increased more than the rotation speed at the time of the plating process.
- the substrate W is rotated at the same rotation speed as in the substrate rinsing process (step S3) before the plating process.
- the rinse liquid nozzle 551 which has been positioned at the retracted position, moves to the discharge position.
- the rinse liquid L3 is supplied from the rinse liquid nozzle 551 to the rotating substrate W to clean the surface of the substrate W.
- the plating solution L1 remaining on the substrate W is washed away.
- the rinsed substrate W is dried (step S9).
- the rotation speed of the substrate W is increased to be higher than the rotation speed of the substrate rinsing process (step S8) to rotate the substrate W at high speed.
- the rinse liquid L3 remaining on the substrate W is shaken off and removed, and as shown in FIG. 5F, the substrate W on which the plating film P is formed is obtained.
- an inert gas such as nitrogen (N2) gas may be ejected onto the substrate W to accelerate the drying of the substrate W.
- the substrate W is taken out from the substrate holding unit 52 and carried out from the plating processing unit 5 (step S10).
- step S1 to S10 a series of plating processing methods (steps S1 to S10) of the substrate W using the plating processing apparatus 1 are completed.
- the substrate W and the lid 6 are formed by moving at least one of the lid 6 and the substrate holding portion 52 up and down while heating the plating solution L1. Since the reaction gas accumulated between them is dispersed, it is possible to prevent the reaction gas concentration from increasing in the central portion of the substrate W.
- the plating components can be uniformly deposited in the plane of the substrate W, and a uniform plating film can be formed.
- the gas discharge operation may be performed a plurality of times in heating the plating solution L1 on the substrate W.
- the uniformity of the plating film on the substrate W can be improved by increasing the number of gas discharge operations depending on the characteristics of the plating solution L1 and the required film thickness of the plating film.
- the gas discharge operation may be performed so that the substrate W is not exposed between the lower surface of the ceiling portion 61 and the lower end 621 of the side wall portion 62. As a result, it is possible to prevent the surface of the substrate W from being exposed to the external atmosphere of the lid body 6 and prevent the plating film on the substrate W from being oxidized.
- the lid 6 may not be provided with a heater, but a heater (not shown) may be provided inside the substrate holding portion 52 to heat the plating solution L1 on the substrate W, or the lid 6 and the substrate may be held. Heaters may be provided on both parts 52.
- a second heater (not shown) may be provided on the side wall portion 62 of the lid body 6. In this case, the temperature rise of the plating solution L1 on the substrate W can be accelerated.
- the present disclosure is not limited to the above-described embodiment and modification as it is, and at the implementation stage, the components can be modified and embodied within a range that does not deviate from the gist thereof.
- various embodiments can be formed by appropriately combining the plurality of components disclosed in the above-described embodiments and modifications. Some components may be removed from all the components shown in the embodiments and modifications. In addition, components spanning different embodiments and variations may be combined as appropriate.
- Plating processing device 3 Control unit 31 Recording medium 52 Substrate holding unit 53 Plating liquid supply unit 531 Plating liquid nozzle 59 Fan filter unit 6 Lid 61 Ceiling 611 First ceiling plate 612 Second ceiling plate 62 Side wall 621 Lower end 63 Heater 631 Inner peripheral side heater 632 Outer peripheral side heater 633 Intermediate heater 64 Lid cover 73 Cylinder L1 Plating liquid
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Abstract
Description
まず、めっき処理部5に基板Wが搬入され、搬入された基板Wが、図5Aに示すように基板保持部52に保持される(ステップS1)。ここでは、基板Wの下面が真空吸着されて、基板保持部52に基板Wが水平に保持される。
次に、基板保持部52に保持された基板Wが、洗浄処理される(ステップS2)。この場合、まず、回転モータ523が駆動されて基板Wが所定の回転数で回転する。続いて、退避位置(図3における実線で示す位置)に位置づけられていたノズルアーム56が、吐出位置(図3における二点鎖線で示す位置)に移動する。次に、回転する基板Wに、洗浄液ノズル541から洗浄液L2が供給されて、基板Wの表面が洗浄される。このことにより、基板Wに付着した付着物等が、基板Wから除去される。基板Wに供給された洗浄液L2は、ドレンダクト581に排出される。
続いて、洗浄処理された基板Wがリンス処理される(ステップS3)。この場合、回転する基板Wに、リンス液ノズル551からリンス液L3が供給されて、基板Wの表面がリンス処理される。このことにより、基板W上に残存する洗浄液L2が洗い流される。基板Wに供給されたリンス液L3はドレンダクト581に排出される。
次に、めっき液盛り付け工程として、リンス処理された基板W上にめっき液L1が供給されて盛り付けられる(ステップS4)。この場合、まず、基板Wの回転数を、リンス処理時の回転数よりも低減させる。例えば、基板Wの回転数を50~150rpmにしてもよい。このことにより、基板W上に形成される後述のめっき膜Pを均一化させることができる。なお、めっき液L1の盛り付け量を増大させるために、基板Wの回転は停止させてもよい。
次に、めっき液加熱処理工程として、基板W上に盛り付けられためっき液L1が加熱される。このめっき液加熱処理工程は、蓋体6が基板Wを覆う工程(ステップS5)と、基板Wと第1天井板611との間隔を第1間隔g1にしてめっき液L1を加熱する加熱工程(ステップS6)と、を有している。なお、加熱工程においても、基板Wの回転数は、めっき液盛り付け工程と同様の速度(あるいは回転停止)で維持されることが好適である。なお、加熱工程における基板Wの回転数は、回転停止と低回転(例えば、20rpm)とを繰り返し行われてもよい。これによりめっき液L1を攪拌することで、めっき膜Pをより均一に形成することができる。
まず、基板Wが蓋体6によって覆われる(ステップS5)。この場合、まず、蓋体移動機構7の旋回モータ72が駆動されて、退避位置(図3における実線で示す位置)に位置づけられていた蓋体6が水平方向に旋回移動して、上方位置(図3における実線で示す位置)に位置づけられる。
次に、加熱工程として、基板W上に盛り付けられためっき液L1が加熱される(ステップS6)。加熱工程でのめっき液L1の加熱は、めっき液L1の温度が所定温度まで上昇するように設定された所定時間行われる。めっき液L1の温度が、成分が析出する温度まで上昇すると、基板Wの上面にめっき液L1の成分が析出し、めっき膜Pが形成され始める。
加熱工程が終了すると、蓋体移動機構7が駆動されて、蓋体6が退避位置に位置づけられる(ステップS7)。この場合、まず、蓋体移動機構7のシリンダ73が駆動されて、第2間隔位置に位置づけられた蓋体6が上昇して、上方位置に位置づけられる。その後、蓋体移動機構7の旋回モータ72が駆動されて、上方位置に位置づけられた蓋体6が水平方向に旋回移動して、退避位置に位置づけられる。
次に、めっき液加熱処理が施された基板Wがリンス処理される(ステップS8)。この場合、まず、基板Wの回転数を、めっき処理時の回転数よりも増大させる。例えば、めっき処理前の基板リンス処理工程(ステップS3)と同様の回転数で基板Wを回転させる。続いて、退避位置に位置づけられていたリンス液ノズル551が、吐出位置に移動する。次に、回転する基板Wに、リンス液ノズル551からリンス液L3が供給されて、基板Wの表面が洗浄される。このことにより、基板W上に残存するめっき液L1が洗い流される。
続いて、リンス処理された基板Wが乾燥処理される(ステップS9)。この場合、例えば、基板Wの回転数を、基板リンス処理工程(ステップS8)の回転数よりも増大させて、基板Wを高速で回転させる。このことにより、基板W上に残存するリンス液L3が振り切られて除去され、図5Fに示すように、めっき膜Pが形成された基板Wが得られる。この場合、基板Wに、窒素(N2)ガスなどの不活性ガスを噴出して、基板Wの乾燥を促進させてもよい。
その後、基板Wが基板保持部52から取り出されて、めっき処理部5から搬出される(ステップS10)。
3 制御部
31 記録媒体
52 基板保持部
53 めっき液供給部
531 めっき液ノズル
59 ファンフィルターユニット
6 蓋体
61 天井部
611 第1天井板
612 第2天井板
62 側壁部
621 下端
63 ヒータ
631 内周側ヒータ
632 外周側ヒータ
633 中間ヒータ
64 蓋体カバー
73 シリンダ
L1 めっき液
Claims (6)
- 基板にめっき液を供給して前記基板を液処理する基板液処理方法であって、
前記基板を基板保持部で保持する工程と、
前記基板の上面に前記めっき液を供給する工程と、
保持された前記基板の上方に配置され天井部を有する蓋体によって前記基板を覆う工程と、
前記蓋体で前記基板を覆った状態で、少なくとも前記蓋体と前記基板保持部のいずれか一方に設けられた加熱部によって、前記基板上の前記めっき液を加熱する工程と
を含み、
前記めっき液を加熱する工程において、少なくとも前記蓋体と前記基板保持部のいずれか一方を上下動作させて前記蓋体と前記基板との間に滞留する反応ガスを押し出すガス排出動作を行う、基板液処理方法。 - 前記ガス排出動作は、前記めっき液を加熱する工程において、複数回行われる、請求項1に記載の基板液処理方法。
- 前記蓋体は、前記天井部から下方に延びる側壁部を有し、
前記ガス排出動作は、前記天井部の下面と前記側壁部の下端との間で前記基板が露出しないよう行われる、請求項1または2に記載の基板液処理方法。 - 基板にめっき液を供給して前記基板を液処理する基板液処理装置であって、
前記基板を保持する基板保持部と、
前記基板保持部を昇降させる基板保持部昇降機構と、
前記基板保持部に保持された前記基板の上面に前記めっき液を供給するめっき液供給部と、
前記基板の上方に配置され前記基板と同じもしくは大きい天井部、を有し、前記基板保持部に保持された前記基板を覆う蓋体と、
前記蓋体に連結されて前記蓋体を昇降させる蓋体移動機構と、
少なくとも前記基板保持部と前記蓋体のいずれか一方に設けられた加熱部と、
前記基板を前記基板保持部で保持するステップと、前記基板の上面に前記めっき液を供給するステップと、前記蓋体によって前記基板を覆うステップと、前記蓋体で前記基板を覆った状態で、前記加熱部によって、前記基板上の前記めっき液を加熱するステップと、が行われるよう制御信号を出力する制御部と、を備え、
前記制御部は、前記基板上の前記めっき液を加熱するステップにおいて、少なくとも前記蓋体の前記蓋体移動機構と前記基板保持部の前記基板保持部昇降機構のいずれか一方を上下動作させて前記蓋体と前記基板との間に滞留する反応ガスを押し出すガス排出動作が行われるよう制御信号を出力する、基板液処理装置。 - 前記ガス排出動作は、前記基板上の前記めっき液を加熱するステップにおいて、複数回行われる、請求項4に記載の基板液処理装置。
- 前記蓋体は、前記天井部から下方に延びる側壁部を有し、
前記ガス排出動作は、前記天井部の下面と前記側壁部の下端との間で前記基板が露出しないよう上下動作が行われる、請求項4または5に記載の基板液処理装置。
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JP2003129250A (ja) * | 2001-08-10 | 2003-05-08 | Ebara Corp | めっき装置及びめっき方法 |
JP2004107747A (ja) * | 2002-09-19 | 2004-04-08 | Tokyo Electron Ltd | 無電解メッキ装置、および無電解メッキ方法 |
JP2005002448A (ja) * | 2003-06-13 | 2005-01-06 | Tokyo Electron Ltd | 無電解メッキ装置および無電解メッキ方法 |
JP2018003097A (ja) * | 2016-07-01 | 2018-01-11 | 東京エレクトロン株式会社 | 基板液処理装置、基板液処理方法および記録媒体 |
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JP2003129250A (ja) * | 2001-08-10 | 2003-05-08 | Ebara Corp | めっき装置及びめっき方法 |
JP2004107747A (ja) * | 2002-09-19 | 2004-04-08 | Tokyo Electron Ltd | 無電解メッキ装置、および無電解メッキ方法 |
JP2005002448A (ja) * | 2003-06-13 | 2005-01-06 | Tokyo Electron Ltd | 無電解メッキ装置および無電解メッキ方法 |
JP2018003097A (ja) * | 2016-07-01 | 2018-01-11 | 東京エレクトロン株式会社 | 基板液処理装置、基板液処理方法および記録媒体 |
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