WO2000037716A1 - Plating apparatus, plating system, method for plating using the same - Google Patents
Plating apparatus, plating system, method for plating using the same Download PDFInfo
- Publication number
- WO2000037716A1 WO2000037716A1 PCT/JP1999/006955 JP9906955W WO0037716A1 WO 2000037716 A1 WO2000037716 A1 WO 2000037716A1 JP 9906955 W JP9906955 W JP 9906955W WO 0037716 A1 WO0037716 A1 WO 0037716A1
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- WO
- WIPO (PCT)
- Prior art keywords
- plating
- semiconductor wafer
- tank
- elastic member
- wafer
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/001—Apparatus specially adapted for electrolytic coating of wafers, e.g. semiconductors or solar cells
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/20—Electroplating using ultrasonics, vibrations
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/12—Semiconductors
-
- 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
- H01L21/2885—Deposition of conductive or insulating materials for electrodes conducting electric current from a liquid, e.g. electrolytic deposition using an external electrical current, i.e. electro-deposition
Definitions
- the present invention relates to a plating apparatus, a plating system, and a plating method using the same, and particularly to a plating method on a workpiece such as a wafer.
- the present invention relates to a plating apparatus for depositing a metal, a plating system, and a plating method using the same.
- a fine base electrode is formed on a substrate by a film forming method such as a chemical vapor deposition (CVD) method, and a plating treatment method of depositing metal on the base electrode is performed. Is used.
- the electrode is immersed in an aqueous solution containing metal ions, and electricity is applied from the outside to cause a reduction reaction at the cathode (base electrode) portion and an oxidation reaction at the anode portion to cause an oxidation reaction.
- metal is deposited on the underlying electrode by a reduction reaction.
- FIG. 9 shows a schematic cross-sectional view of a plating apparatus used for the plating process.
- the plating apparatus 51 includes a plating tank 52 filled with a plating solution, an outer wall 53 provided around the plating tank 52, and a tank 54 storing the plating solution. And a pump 55 for supplying the plating solution in the tank 54 from the lower center of the plating tank 52 to the plating tank 52.
- protrusions 56 protruding toward the inner peripheral surface are provided at, for example, 90 ° intervals on the inner peripheral surface, and a copper ring 5 is provided on the protrusion 56. 7 is placed Have been. Then, a wafer 58 as an object to be processed is placed on the copper ring 57 so that the surface to be plated is on the lower side. A base electrode 59 as a cathode, which is a surface to be plated, is formed on the wafer 58, and the base electrode 59 and the copper ring 57 are electrically connected.
- the wafer 58 placed on the copper ring 57 is fixed by a fixing jig 60 using a pressing means, and when the plating solution in the plating tank 52 comes into contact with the wafer 58, the wafer 58 is placed on the back side (wafer 5). 8 upper surface).
- An anode plate 61 as an anode is arranged at the bottom of the plating tank 52 so as to be parallel to the wafer 58.
- the anode plate 61 and the copper ring 57 are electrically connected to a current source 62.
- the plating solution is supplied into the plating tank 52, and the deposition liquid flows uniformly from the center of the wafer 58 to the end.
- the plating tank 52 is filled with the plating solution, the plating solution is removed. It is pushed out from the upper part of the fitting tank 52 toward the end. Then, the plating solution extruded toward the end is stored in the tank 54 through the pipe 63.
- the plating apparatus 51 has a circulation structure in which the plating solution circulates. Then, a few seconds after the supplied liquid was supplied into the plating tank 52 and the contact liquid was brought into contact with the wafer 58, energization was started, and a plating film was formed on the base electrode 59 by this energization.
- the base electrode 59 is formed in a fine uneven shape, and there is a case where the liquid does not sufficiently flow into the concave portion.
- air bubbles generated in the plating bath 52 may adhere to the base electrode 59, particularly to the concave portions thereof.
- unevenness occurs in the current distribution of the base electrode 59, and the thickness of the plating film formed on the base electrode 59 varies due to the difference in current at the base electrode 59. . Therefore, there is a problem that a uniform plating film cannot be formed on the base electrode 59.
- the copper ring 57 is in contact with the wafer 58 on the entire upper surface thereof, and it is difficult to make the contact resistance in this surface uniform. For this reason, the current distribution of the base electrode 59 may be uneven due to the difference in the contact resistance between the contact surfaces. If the current distribution becomes uneven, the thickness of the plating film formed on the base electrode 59 will differ due to the difference in the current at the base electrode 59. Therefore, there was a problem that a uniform plating film was not formed on the base electrode 59. On the other hand, when an electrode pin is used instead of the copper ring 57, it is possible to reduce the unevenness of the current distribution of the base electrode 59 as compared with the case where the copper ring 57 is used. This limits the amount of current that can be passed through. In this case, the thickness of the plating film that can be formed on the base electrode 59 is limited, and there is a problem that the versatility of the plating apparatus is lacking.
- the present invention has been made to solve the above problems, and an object of the present invention is to provide a plating apparatus, a plating system, and a plating system that can form a plating film having a uniform thickness on a workpiece. To provide a plating method. Disclosure of the invention
- a plating apparatus includes a plating tank filled with a plating solution, and a plating tank connected to a first electrode formed above the plating tank and formed on a surface of a semiconductor wafer. And a second electrode disposed in the plating bath, and an ultrasonic vibration member disposed in the plating bath.
- the object to be processed is arranged on the connection member so that the first electrode is electrically connected to the connection member, and the plating bath is filled with the plating solution.
- a current is supplied to the plating apparatus, and ultrasonic vibration is continuously applied to the plating bath by the ultrasonic vibration member.
- the plating apparatus of the present invention is characterized in that the first electrode on which the semiconductor wafer is to be processed is disposed on the lower side, and the semiconductor wafer is fixed to the plating tank. It is characterized by being.
- the plating apparatus of the present invention is characterized in that the ultrasonic vibration member changes its frequency during the plating process. By doing so, the position of the antinode of the standing wave in the plating tank can be changed, so that the vibration intensity can be averaged, and the spots can be prevented from becoming uneven.
- the plating apparatus of the present invention comprises: a plating tank filled with a plating solution; a first elastic member disposed on the plating tank and connected to a first electrode formed on the surface of the semiconductor wafer; It is characterized by comprising a second elastic member provided above the tank so that the plating solution in the tank does not contact the first elastic member, and a second electrode provided in the plating tank.
- the first elastic member and the second elastic member are composed of elastic members, and the object to be processed is the first elastic member so that the first electrode is electrically connected to the first elastic member.
- the contact resistance between the first elastic member and the first electrode becomes uniform while being arranged on the second elastic member. Since the contact resistance is uniform, the current distribution of the first electrode becomes uniform, and a plating film having a uniform thickness is formed on the first electrode.
- the first electrode is in contact with the upper surface of the first elastic member, so that the amount of current that can flow through the first elastic member is not greatly limited, and a plating film having a predetermined thickness is formed on the first electrode. Is done.
- the object to be processed is arranged on the first elastic member and the second elastic member so that the first electrode is electrically connected to the first elastic member, the plating bath is filled with the plating solution. In this state, the plating solution does not contact the first elastic member. For this reason, the metal does not deposit on the first elastic member.
- the plating apparatus of the present invention is characterized in that an ultrasonic vibration member is provided in a plating tank. Therefore, the bubbles are prevented from adhering to the first electrode due to the ultrasonic vibration, and the circulation of the plating liquid in the plating tank is promoted by the ultrasonic vibration. For this reason, the plating solution is supplied to the entire surface of the first electrode, and uniform plating can be performed.
- the first elastic member and the second elastic member are formed in a ring shape. With this configuration, the first elastic member and the second elastic member can be easily formed and provided in the mounting device.
- the elastic member it is preferable that the first elastic member is made of conductive rubber and the second elastic member is made of chemical resistant rubber. Further, when the first elastic member is formed in a spiral shape, the stress applied to the first elastic member is dispersed, and the durability of the first elastic member is improved.
- a plating system is a transport device that holds a semiconductor wafer and transports the semiconductor wafer to a predetermined position, and a plating device that attaches the semiconductor wafer transported by the transport device, wherein a plating solution is filled.
- An ultrasonic vibration member is provided in the plating bath, A plating apparatus configured to apply ultrasonic vibration to the plating solution during the plating process; a cleaning apparatus for cleaning the semiconductor wafer on which the plating film is formed by the plating apparatus; and the semiconductor cleaned by the cleaning apparatus.
- a drying device for drying the wafer.
- the semiconductor wafer is held by the transfer device and transferred to the plating device, and a plating film is formed on the first electrode of the semiconductor wafer.
- the semiconductor wafer on which the plating film is formed is held by a transfer device, transferred to a cleaning device, and cleaned.
- the cleaned object is held by the transfer device and transferred to the drying device, where the wafer is dried.
- the transfer device is configured so that the wafer can be turned upside down while holding the wafer, the wafer can be dried with the surface on which the plating film is formed facing upward, and the structure of the drying device is simplified.
- the plating method of the present invention includes a transporting step of holding a semiconductor wafer and transporting the semiconductor wafer to a predetermined position, and contacting the semiconductor wafer transported in the transporting step with a plating solution to which ultrasonic vibration is applied.
- a drying step of drying the product if an inversion step of inverting the object to be processed while holding the object to be processed is provided between the cleaning step and the drying step, the drying step is performed with the surface on which the plating film is formed facing upward. Is performed.
- This processing method can be applied to a plating process, for example, a copper plating process.
- FIG. 1 is a schematic view showing one embodiment of a plating system according to the present invention.
- FIG. 2 is a schematic configuration diagram showing a transport device in the plating system shown in FIG.
- FIG. 3 is a sectional view showing an embodiment of the plating apparatus according to the present invention.
- FIG. 4 is a cross-sectional view showing a cleaning device in the plating system shown in FIG.
- FIG. 5 is a schematic diagram showing a spin dryer in the plating system shown in FIG.
- FIG. 6 is a flowchart showing a plating method according to the present invention.
- FIG. 7 is a graph showing the thickness of the formed seizure film.
- FIG. 8 is an enlarged perspective view showing another embodiment of the portion indicated by reference numeral IV in FIG.
- FIG. 9 is a schematic sectional view showing a conventional plating apparatus. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a schematic diagram of a plating system according to the present embodiment.
- a plating system 1 includes a transfer device 3 that holds a wafer 2 as an object to be processed and transfers it to a predetermined position, a plating device 4 that forms a plating film on the surface of the wafer 2, and a plating device.
- a cleaning device 5 for cleaning the wafer 2 on which a film is formed, and a spin dryer 6 as a drying device for drying the cleaned wafer 2 are provided.
- the plating system 1 is provided with a cassette station 7 including a carry-in port 7a and a carry-out port 7b, and a cassette in which a plurality of, for example, 25 wafers 2 are stored. 8 is housed.
- a cassette station 7 including a carry-in port 7a and a carry-out port 7b, and a cassette in which a plurality of, for example, 25 wafers 2 are stored. 8 is housed.
- two sets of the plating device 4 and the cleaning device 5 are provided, and the plating device 4, the cleaning device 5, and the spin dryer 6 are installed in a line.
- a rail 9 is laid between each of these devices and the cassette station 7, and the transport device 3 is arranged on the rail 9.
- FIG. 2 shows a schematic diagram of the transfer device 3.
- the transfer device 3 rotates the transfer device main body 10 disposed on the rail 9, the arm support 11 provided on the transfer device main body 10, and the arm support 11.
- a support shaft 12 that supports the transfer arm 13 a transfer arm 13 that holds the wafer 2, and an arm support shaft 14 that rotatably supports the transfer arm 13.
- the transport device main body 10 is moved on the rail 9 in the vertical direction in FIG. 2 (the left-right direction in FIG. 1) by a drive mechanism (not shown).
- the arm support base 11 is connected to the transfer apparatus main body 10 via the support shaft 12, and when the support shaft 12 is rotated, the arm support base 11 is turned around the support shaft 12.
- the transfer arm 13 is connected to the arm support base 11 via the arm support shaft 14, and is rotated about the arm support shaft 14 when the arm support shaft 14 is rotated. That is, upside down is performed while the wafer 2 is held on the transfer arm 13. It is configured to be possible. Further, the support shaft 12 and the arm support shaft 14 are configured to be able to protrude in the axial direction.
- the arm support base 11 When the support shaft 12 is protruded, the arm support base 11 is raised, and when the arm support shaft 14 is protruded.
- the transfer arm 13 protrudes. Therefore, the transfer arm 13 can move in each of the directions of up and down, left and right, front and back, upside down, and turning, and these movements transfer the wafer 2 to a predetermined position.
- the transfer arm 13 is provided with a suction mechanism (not shown), and the wafer 2 is held by a so-called vacuum chuck method in which the wafer 2 is suctioned by the suction mechanism.
- FIG. 3 shows a schematic sectional view of the plating apparatus 4.
- a plating tank 15 filled with a copper sulfate plating solution (hereinafter, referred to as a plating solution) of the plating apparatus 4 is formed in a substantially cylindrical shape, and the inner peripheral surface is formed over the entire periphery at the upper end thereof.
- a protruding portion 16 is provided above the protrusion 16, a first ⁇ ring 17 as a first elastic member, which constitutes a connection member, is disposed.
- the 10th ring 17 is formed of a ring-shaped conductive material. In the present embodiment, a highly conductive rubber having a volume resistivity of 1 ⁇ 10 2 ⁇ cm is used.
- the first 10 ring 17 is arranged on the upper surface thereof such that a base electrode 18 as a first electrode formed on the surface of the wafer 2 is arranged on the plating bath 15 side, and It is arranged at the contact position. Therefore, the tenth link 17 and the base electrode 18 are electrically connected.
- the base electrode 18 is formed in a fine shape in advance by, for example, CVD. Further, the wafer 2 is fixed by a fixing jig 19 in a state where the wafer 2 is arranged above the plating tank 15.
- the second ring 20 is formed of a ring-shaped high chemical resistance material. In the present embodiment, fluorine rubber for acid resistance is used.
- the second ring 20 can seal the plating bath 15 so that the plating solution in the plating element 15 does not flow out of the second ring 20 when the wafer 2 is placed. It is formed in a state. Therefore, the plating solution in the plating tank 15 does not come into contact with the 10th ring 17.
- a tank 21 in which a plating solution is stored and a pump 22 for supplying the plating solution in the tank 21 to the plating tank 15 are provided below the plating tank 15, a tank 21 in which a plating solution is stored and a pump 22 for supplying the plating solution in the tank 21 to the plating tank 15 are provided.
- a magnet pump having excellent corrosion resistance is used for the pump 22, and control using an inverter is performed so that the number of rotations can be changed.
- the plating solution in the tank 21 is supplied into the plating tank 15 through the piping line 23 by driving the pump 22, and when the plating tank 15 is filled with the plating solution, the piping line 2 3 It is discharged from the plating tank 15 to the tank 21 through the tank.
- the plating apparatus 4 has a structure in which the plating solution circulates through the piping line 23 to the plating tank 15, the tank 21, the pump 22, and the plating tank 15.
- An anode plate 24 as a second electrode is provided on the bottom surface of the plating tank 15.
- the anode plate 24 is disposed at a position facing the base electrode 18 with the wafer 2 disposed above the 10th ring 17 and the 20th ring 20.
- the anode plate 24 is formed in a shape that does not obstruct the plating liquid supplied by the pump 22, and in the present embodiment, is formed in a donut shape.
- the material of the anode plate 24 depends on the type of plating. However, in this embodiment, a copper sulfate plating solution is used, so that a copper plate having a phosphorus content of 0.03 to 0.08% by weight is used. Used.
- the anode plate 24 and the first ring 17 are electrically connected to the current source 25.
- An ultrasonic vibrator 26 as an ultrasonic vibrating member is disposed on the inner wall of the plating tank 15.
- the ultrasonic vibrator 26 is for applying ultrasonic vibration to the plating solution to promote the circulation of the solution in the portion to be covered, and to prevent the accumulation of bubbles.
- the ultrasonic vibrator 26 can periodically change its frequency during the plating process.
- the plating is performed with the frequency varied in the range of 30 to 50 kHz for 2 seconds. By doing so, the position of the antinode of the standing wave formed in the plating tank can be periodically changed. Therefore, the vibration intensity applied to the plating surface can be averaged, and uneven plating can be prevented, and uniform plating can be performed.
- FIG. 4 shows a schematic cross-sectional view of the cleaning device 5.
- the cleaning device 5 is provided with a cleaning tank 27 filled with a cleaning solution, in this embodiment, pure water, and a cleaning tank 27.
- a supply pipe 29 for supplying pure water from the lower part of the washing tank 27 to the inside of the washing tank 27.
- a projection 30 protruding on the inner peripheral surface side is provided at the upper end of the cleaning tank 27, a projection 30 protruding on the inner peripheral surface side is provided.
- the inner peripheral surface is provided at four locations so as to be 90 degrees apart c.
- the surface plated on the protrusion 30 (the base electrode 18 side) becomes the lower surface
- the wafer 2 is placed as described above.
- the cleaning device 5 when the inside of the cleaning tank 27 is filled with the supplied pure water, the pure water is pushed out from the upper part of the cleaning tank 27 toward the end. Then, the pure water extruded toward the end is discharged through the discharge pipe 31 between the cleaning tank 27 and the outer wall 28.
- Fig. 5 shows a schematic diagram of the spin dryer 6.
- the spin dryer 6 has a wafer support portion 32 for supporting the wafer 2, a rotation shaft 33 for rotating the wafer support portion 32, and the wafer 2 supported on the wafer support portion 32.
- An air nozzle 34 capable of blowing gas to the wafer 2 in the state is provided.
- a concave portion 35 corresponding to the shape of the wafer 2 is provided in the wafer support portion 32, and the wafer 2 is accommodated in the concave portion 35 so that the base electrode 18 side is on the upper surface.
- the motor 36 is connected to the rotation shaft 33, and the rotation of the rotation shaft 33 is driven by the drive of the motor 36, and the wafer support 32 is rotated about the rotation shaft 33.
- the air nozzle 34 is arranged so that a gas is blown near the center of the wafer 2.
- the air nozzle 34 is connected to a gas pipe line 37, and gas is supplied by an electromagnetic valve 38.
- the electromagnetic valve 38 and the motor 36 are connected to a controller 39, and the rotation of the wafer 2 and the blowing of gas to the wafer 2 are controlled by the controller 39.
- the wafer 2 is dried with the surface on which the plating film is formed facing upward.
- FIG. 6 is a flowchart showing the plating processing method.
- the transfer device 3 is moved to a position in front of the cassette 8 accommodated in the entrance 7a of the cassette station 7, and the suction mechanism of the transfer arm 13 forms the base electrode 18 accommodated in the cassette 8.
- the held wafer 2 is sucked and held.
- move the transfer device 3 to the position before the plating device 4 and
- the wafer 2 is placed on the 10th ring 17 and the 20th ring 20 above the plating tank 15 so that the ground electrode 18 is on the plating tank 15 side (STEP 1).
- the wafer 2 is fixed with the fixing jig 19, and the pump 22 is driven to supply the plating solution in the tank 21 to the plating tank 15.
- a copper sulfate plating solution obtained by adding copper sulfate 200 g / 1 liter and sulfuric acid 50 g / 1 liter to water is used as a plating solution, and the temperature of the plating solution is 30 ° C. Has been adjusted. A few seconds after the plating bath was filled with the plating solution in the plating bath 15 and the wafer 2 was brought into contact with the plating solution, current was supplied to the plating apparatus, and the ultrasonic vibrator 26 applied ultrasonic vibration to the plating bath. Is continuously applied.
- the current density of base electrode 18 is 10 A / cm 2
- the current density of anode plate 24 is 5 A / cm 2
- the voltage is 4 V.
- the frequency of the ultrasonic transducer 26 is 50 kHz. This energization causes a chemical reaction in the plating solution, and copper ions in the plating solution become copper and are adsorbed on the underlying electrode 18 to form a copper plating film (STEP 2).
- the current distribution of the base electrode 18 when the current is supplied from the current source 25 becomes uniform, and a plating film having a uniform thickness is formed on the base electrode 18.
- the base electrode 18 is in contact with the upper surface of the 10th ring 17, and the amount of current that can be conducted is not greatly limited as in the conventional electrode pins. Can be formed.
- the inside of the plating tank 15 is sealed with the wafer 2 and the 20 ring 20, and the plating bath 15 is filled with the plating solution.
- the adhering liquid does not come into contact with the first ring 17 disposed outside the second ring 20. Therefore, copper does not precipitate on the 10th ring 17.
- the transfer arm 13 When a plating film is formed on the base electrode 18 of the wafer 2, the transfer arm 13 is attracted While the wafer 2 is held by the mechanism, the transfer device 3 is moved to the front of the cleaning device 5, so that the base electrode 18 of the wafer 2 is on the cleaning tank 27 side so that the protrusion 30 of the cleaning tank 27 is on the protrusion 30. Place wafer 2 on Then, pure water is supplied into the cleaning tank 27, and the plating solution adhered to the wafer 2 disposed on the projection 30 is cleaned (STEP 3).
- the arm support shaft 14 is rotated while holding the wafer 2 by the suction mechanism of the transfer arm 13, and the wafer 2 is turned upside down. As a result, the base electrode 18 side of the wafer 2 becomes the upper surface of the wafer 2 (STEP 4).
- the transfer device 3 When the underlayer 4 is located on the upper surface of the wafer 2, the transfer device 3 is moved to a position in front of the spin dryer 6, and the wafer 2 is accommodated in the recess 35 of the wafer support 32. Then, the controller 36 drives the motor 36 to rotate the wafer 2, opens the electromagnetic valve 38, and moves the air valve 34 from the air nozzle 34 to the vicinity of the center of the wafer 2 through the gas piping line 37. Gas is blown on When the wafer 2 is rotated, the pure water attached to the wafer 2 is scattered by the centrifugal force.
- the thickness of the plating film formed on the base electrode 18 of the wafer 2 was measured at nine equally spaced points on a straight line passing through the center of the wafer 2 .
- Figure 7 shows the results. Further, for reference, the thickness of the deposit film formed by the conventional plating apparatus 51 was measured in the same manner, and the result is shown by a broken line in FIG. As shown in FIG. 7, the thickness of the deposited film formed in the present embodiment is almost uniform at about 2.1 m, and the thickness of the conventional plated film is 1.5 / ⁇ ! It can be seen that it is greatly improved compared to the case of ⁇ 2.2 2m. Thus, it was confirmed that a plating film having a uniform thickness can be formed on the base electrode 18 of the wafer 2 according to the present invention.
- the water generated by the chemical reaction in the plating solution due to energization do not adhere to the base electrode 18 due to the ultrasonic vibration from the ultrasonic vibrator 26.
- the circulation of the plating solution in the plating tank 15 is promoted by the ultrasonic vibration, and the plating solution is easily supplied to the entire surface of the base electrode 18. Therefore, the current distribution of the base electrode 18 becomes uniform, and a plating film having a uniform thickness can be formed on the base electrode 18.
- the contact resistance between the 10th ring 17 and the base electrode 18 becomes uniform. Therefore, the current distribution of the base electrode 18 becomes uniform, and a plating film having a uniform thickness can be formed on the base electrode 18.
- the base electrode 18 is in contact with the upper surface of the 10th ring 17, and the amount of current that can be conducted is not greatly limited as in the conventional electrode pins. Can be formed.
- the plating bath 15 is formed in a shape that can be hermetically sealed so that the plating solution in the 20th ring 20 fitting bath 15 does not flow out of the 2nd ring 20. Is no longer in contact with the first ring 17. Therefore, copper does not precipitate on the 10th ring 17.
- the plating apparatus 4 has a structure in which the plating tank 15 is sealed with the wafer 2 placed on the first ring 17 and the second ring 20. Therefore, the plating solution in plating bath 15 does not adhere to the upper surface of wafer 2.
- the apparatus for forming and attaching the 10th ring 17 and the 20th ring 20 is provided. 4 can be easily arranged.
- highly conductive rubber is used for the 10th ring 17 and fluorine rubber is used for the 20th ring 20
- the durability of the 10th ring 17 and the 20th ring 20 is improved. The performance is improved.
- the embodiment is not limited to the above, and may be, for example, the following case.
- a case has been described in which the connecting member is constituted by the 10th ring 17 and the 20th ring 20.However, the present invention is not limited to this.
- the protrusion 16 may be formed by fitting a conductive material. Further, the 10th ring 17 and the 20th ring 20 may be integrally formed. In these cases, the arrangement in the plating apparatus 4 becomes easy.
- the first elastic member only needs to be electrically connected to the base electrode 18, and the shape is not limited to the ring shape, and may be, for example, an arc shape. Further, as shown in FIG. 8, the shape of the 10th ring 17 may be formed in a spiral shape, and the surface thereof may be pressed against the base electrode 18 for connection. In this case, the stress applied to the tenth ring 17 is dispersed, and the durability of the tenth ring 17 is improved.
- the second elastic member may be any member as long as the plating solution in the plating tank 15 does not contact the first elastic member, and the shape is not limited to a ring shape.
- a concentration sensor for measuring the concentration of the plating solution may be provided in the plating tank 15, and a concentration control member for adjusting the concentration of the plating solution in the tank 21 based on the measured concentration may be provided.
- the concentration of the plating solution can be controlled to a constant concentration in the plating bath 15, and even if the plating apparatus 4 is continuously used, the plating film having a predetermined thickness is formed on the base electrode 18. Can be formed.
- the cleaning step may be performed in the plating apparatus 4 without providing the cleaning apparatus 5 in the plating system 1.
- nitrogen gas is supplied to the plating tank 15 to remove the plating solution, and pure water is newly supplied into the plating tank 15.
- the plating apparatus 4 is not limited to a structure in which the plating tank 15 is sealed in a state where the wafer 2 is placed on the 10th ring 17 and the 20th ring 20.
- An outer wall may be provided around the tank 15 so as to be pushed out toward the end of the wafer 2 so as to have a circulating structure in which the adhering liquid is stored in the tank 21 through the space between the plating tank 15 and the outer wall. . In this case, the same effect as in the present embodiment can be obtained.
- the present invention is not limited to copper sulfate plating.
- organic acid solder plating may be used.
- high purity is adjusted according to the ratio of tin component and lead component in the liquid that is applied to the anode plate 24.
- a solder plate is used.
- silver plating may be used.
- the case where a plating film having a thickness of about 2. lm is formed on the base electrode 18 has been described, and the composition of the plating solution, the normal conditions, the temperature of the plating solution, and the like have been described.
- Various conditions vary depending on the plating film to be formed. For example, by adding a small amount of chlorine to the plating solution, the physical properties and appearance of the plating film can be improved. Also, by adding a small amount of a sulfur-based organic compound as an additive, the glossiness of the plating film can be improved.
- a film having a uniform thickness can be formed on an object to be processed.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP99959760A EP1061159A4 (en) | 1998-12-21 | 1999-12-10 | PLATING METHOD, APPARATUS AND SYSTEM THEREFOR |
US09/642,158 US6428661B1 (en) | 1998-12-21 | 2000-08-21 | Plating apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP36310498A JP4245713B2 (ja) | 1998-12-21 | 1998-12-21 | めっき装置、めっきシステム及びこれを用いためっき処理方法 |
JP10/363104 | 1998-12-21 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/642,158 Continuation US6428661B1 (en) | 1998-12-21 | 2000-08-21 | Plating apparatus |
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WO2000037716A1 true WO2000037716A1 (en) | 2000-06-29 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP1999/006955 WO2000037716A1 (en) | 1998-12-21 | 1999-12-10 | Plating apparatus, plating system, method for plating using the same |
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US (1) | US6428661B1 (ja) |
EP (1) | EP1061159A4 (ja) |
JP (1) | JP4245713B2 (ja) |
KR (1) | KR100401376B1 (ja) |
TW (1) | TW508377B (ja) |
WO (1) | WO2000037716A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1099781A2 (en) * | 1999-11-12 | 2001-05-16 | Applied Materials, Inc. | Conductive biasing member for metal layering |
TWI638069B (zh) * | 2015-03-18 | 2018-10-11 | 日商東芝股份有限公司 | 電氣鍍敷裝置 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6573183B2 (en) * | 2001-09-28 | 2003-06-03 | Agere Systems Inc. | Method and apparatus for controlling contamination during the electroplating deposition of metals onto a semiconductor wafer surface |
KR100423721B1 (ko) * | 2001-10-11 | 2004-03-22 | 한국전자통신연구원 | 전극링을 가진 도금장치 |
KR100967256B1 (ko) * | 2007-12-10 | 2010-07-01 | 주식회사 동부하이텍 | 구리 전기도금 장치 및 구리 도금방법 |
JP5060365B2 (ja) * | 2008-03-31 | 2012-10-31 | 株式会社東芝 | めっき装置、めっき方法、および電子デバイスの製造方法 |
US7727863B1 (en) | 2008-09-29 | 2010-06-01 | Novellus Systems, Inc. | Sonic irradiation during wafer immersion |
CN106119921B (zh) * | 2016-08-22 | 2018-01-23 | 竞陆电子(昆山)有限公司 | Pcb电镀线 |
CN106086977B (zh) * | 2016-08-23 | 2018-02-06 | 竞陆电子(昆山)有限公司 | Pcb电镀线的供药循环系统 |
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JPS5032047A (ja) * | 1973-07-24 | 1975-03-28 | ||
US5447615A (en) * | 1994-02-02 | 1995-09-05 | Electroplating Engineers Of Japan Limited | Plating device for wafer |
JPH1036996A (ja) * | 1996-07-19 | 1998-02-10 | Sumitomo Kinzoku Electro Device:Kk | Icパッケージ用基板のめっき処理装置 |
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DE2019178A1 (de) * | 1970-04-21 | 1971-11-11 | Siemens Ag | Verfahren zum Auftragen von galvanischen Schichten auf einen Traegerkoerper und galvanisches Bad zur Durchfuehrung des Verfahrens |
JPS5159729A (en) * | 1974-03-13 | 1976-05-25 | Mitsubishi Electric Corp | Denkimetsukiho oyobi sochi |
JP3167317B2 (ja) * | 1990-10-18 | 2001-05-21 | 株式会社東芝 | 基板処理装置及び同方法 |
JP2798517B2 (ja) * | 1991-03-11 | 1998-09-17 | 日本エレクトロプレイテイング・エンジニヤース 株式会社 | ウエーハ用メッキ装置 |
JPH06256998A (ja) * | 1993-03-05 | 1994-09-13 | Shimada Phys & Chem Ind Co Ltd | メッキ液の攪拌方法 |
US5409594A (en) * | 1993-11-23 | 1995-04-25 | Dynamotive Corporation | Ultrasonic agitator |
EP0877713B1 (en) * | 1996-01-29 | 2005-02-16 | Electrochemicals Inc. | Ultrasonic mixing of through hole treating compositions |
US5653860A (en) * | 1996-05-02 | 1997-08-05 | Mitsubishi Semiconductor America, Inc. | System for ultrasonic removal of air bubbles from the surface of an electroplated article |
US5648128A (en) * | 1996-06-06 | 1997-07-15 | National Science Council | Method for enhancing the growth rate of a silicon dioxide layer grown by liquid phase deposition |
US5904827A (en) * | 1996-10-15 | 1999-05-18 | Reynolds Tech Fabricators, Inc. | Plating cell with rotary wiper and megasonic transducer |
-
1998
- 1998-12-21 JP JP36310498A patent/JP4245713B2/ja not_active Expired - Fee Related
-
1999
- 1999-12-10 KR KR10-2000-7009112A patent/KR100401376B1/ko not_active IP Right Cessation
- 1999-12-10 EP EP99959760A patent/EP1061159A4/en not_active Withdrawn
- 1999-12-10 WO PCT/JP1999/006955 patent/WO2000037716A1/ja not_active Application Discontinuation
- 1999-12-18 TW TW088122360A patent/TW508377B/zh not_active IP Right Cessation
-
2000
- 2000-08-21 US US09/642,158 patent/US6428661B1/en not_active Expired - Fee Related
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JPS5032047A (ja) * | 1973-07-24 | 1975-03-28 | ||
US5447615A (en) * | 1994-02-02 | 1995-09-05 | Electroplating Engineers Of Japan Limited | Plating device for wafer |
JPH1036996A (ja) * | 1996-07-19 | 1998-02-10 | Sumitomo Kinzoku Electro Device:Kk | Icパッケージ用基板のめっき処理装置 |
Non-Patent Citations (1)
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1099781A2 (en) * | 1999-11-12 | 2001-05-16 | Applied Materials, Inc. | Conductive biasing member for metal layering |
EP1099781A3 (en) * | 1999-11-12 | 2003-09-10 | Applied Materials, Inc. | Conductive biasing member for metal layering |
TWI638069B (zh) * | 2015-03-18 | 2018-10-11 | 日商東芝股份有限公司 | 電氣鍍敷裝置 |
Also Published As
Publication number | Publication date |
---|---|
EP1061159A4 (en) | 2004-11-10 |
EP1061159A1 (en) | 2000-12-20 |
US6428661B1 (en) | 2002-08-06 |
KR100401376B1 (ko) | 2003-10-17 |
KR20010041073A (ko) | 2001-05-15 |
JP4245713B2 (ja) | 2009-04-02 |
JP2000178785A (ja) | 2000-06-27 |
TW508377B (en) | 2002-11-01 |
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