WO2017086055A1 - バフ処理装置および基板処理装置 - Google Patents
バフ処理装置および基板処理装置 Download PDFInfo
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- WO2017086055A1 WO2017086055A1 PCT/JP2016/080071 JP2016080071W WO2017086055A1 WO 2017086055 A1 WO2017086055 A1 WO 2017086055A1 JP 2016080071 W JP2016080071 W JP 2016080071W WO 2017086055 A1 WO2017086055 A1 WO 2017086055A1
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- buff
- cover
- cover member
- head
- processing device
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Images
Classifications
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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 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
- B24B41/047—Grinding heads for working on plane surfaces
-
- 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
- H01L21/02041—Cleaning
- H01L21/02043—Cleaning before device manufacture, i.e. Begin-Of-Line process
- H01L21/02052—Wet cleaning only
-
- 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
- H01L21/02041—Cleaning
- H01L21/02096—Cleaning only mechanical cleaning
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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
- H01L21/67—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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
- H01L21/67051—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing using mainly spraying means, e.g. nozzles
-
- 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
- H01L21/67—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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67092—Apparatus for mechanical treatment
-
- 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
- H01L21/67—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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67155—Apparatus for manufacturing or treating in a plurality of work-stations
- H01L21/67207—Apparatus for manufacturing or treating in a plurality of work-stations comprising a chamber adapted to a particular process
- H01L21/67219—Apparatus for manufacturing or treating in a plurality of work-stations comprising a chamber adapted to a particular process comprising at least one polishing chamber
Definitions
- the present invention relates to a buff processing apparatus and a substrate processing apparatus.
- the present invention also relates to a cover used for the buff processing apparatus and a maintenance method for the buff processing apparatus.
- a processing apparatus has been used to perform various types of processing on a processing target (for example, a substrate such as a semiconductor wafer or various films formed on the surface of the substrate).
- a processing target for example, a substrate such as a semiconductor wafer or various films formed on the surface of the substrate.
- CMP Chemical Mechanical Polishing
- the CMP apparatus includes a polishing unit for performing a polishing process on a processing target, a cleaning unit for performing a cleaning process and a drying process on the processing target, and a processing unit that delivers the processing target to the polishing unit and performs a cleaning process by the cleaning unit. And a load / unload unit that receives the dried processed object.
- the CMP apparatus also includes a transport mechanism that transports the processing object in the polishing unit, the cleaning unit, and the load / unload unit. The CMP apparatus sequentially performs various processes such as polishing, cleaning, and drying while conveying a processing object by a conveyance mechanism.
- the substrate is subjected to a slight additional polishing with respect to the substrate after the polishing process while pressing the contact member having a smaller diameter than the substrate against the substrate, and a process for removing and cleaning the deposits on the substrate.
- the unit may be provided in the CMP apparatus separately from the main polishing unit.
- JP 2010-50436 A Japanese Patent Laid-Open No. 11-162893
- the substrate In the processing unit using a contact member having a smaller diameter than the substrate as described above, it is desirable to ensure in-plane uniformity of the substrate to be processed.
- the substrate When the substrate is processed using a small-diameter contact member, or when the contact member is separated from the substrate after the processing is completed, if the contact member and the substrate are not kept parallel, the substrate may be partially overloaded. Polishing, uneven wear, and scratches may occur.
- a liquid such as a slurry, a chemical solution, or pure water may be used for polishing or cleaning the substrate. Therefore, a cover may be provided around the contact member in order to prevent various liquids used for processing from entering the drive unit that drives the contact member. However, if a cover is provided around the contact member, it takes time to remove the cover during maintenance such as replacement of the contact member.
- the present invention is intended to at least partially solve at least a part of the problems described above.
- a buffing apparatus for buffing a substrate.
- a buff processing device includes a rotatable shaft, a buff head body, a torque transmission mechanism for transmitting rotation of the shaft to the buff head body, and an elastic elastically supporting the buff head body in the longitudinal direction of the shaft. And a member.
- FIG. 4 is a diagram illustrating a schematic configuration of a buff processing module according to an embodiment. It is a schematic sectional drawing of the buff head vicinity of the buff processing apparatus by one Embodiment. FIG. 6 is a top sectional view of the buff head shown in FIG. 5. It is a schematic sectional drawing of the buff head vicinity of the buff processing apparatus by one Embodiment. It is a schematic sectional drawing of the buff head vicinity of the buff processing apparatus by one Embodiment.
- FIG. 9A It is an enlarged view of the cover shown by FIG. It is the figure which looked at the cover shown by FIG. 9A from the direction of the arrow 9B.
- FIG. 1 is a plan view showing the overall configuration of a processing apparatus according to an embodiment of the present invention.
- a processing apparatus (CMP apparatus) 1000 for processing a processing target includes a substantially rectangular housing 1.
- the interior of the housing 1 is partitioned into a load / unload unit 2, a polishing unit 3, and a cleaning unit 4 by partition walls 1a and 1b.
- the load / unload unit 2, the polishing unit 3, and the cleaning unit 4 are assembled independently and exhausted independently.
- the cleaning unit 4 also includes a power supply unit that supplies power to the processing apparatus, and a control device 5 that controls the processing operation.
- the load / unload unit 2 includes two or more (four in this embodiment) front load units 20 on which wafer cassettes for stocking a large number of processing objects (for example, wafers (substrates)) are placed.
- front load portions 20 are disposed adjacent to the housing 1 and are arranged along the width direction (direction perpendicular to the longitudinal direction) of the processing apparatus.
- the front load unit 20 can be equipped with an open cassette, a SMIF (Standard Manufacturing Interface) pod, or a FOUP (Front Opening Unified Pod).
- SMIF and FOUP are sealed containers that can maintain an environment independent of the external space by accommodating a wafer cassette inside and covering with a partition wall.
- a traveling mechanism 21 is laid along the front load unit 20.
- two transfer robots (loader, transfer mechanism) 22 that can move along the arrangement direction of the wafer cassettes are installed.
- the transfer robot 22 can access the wafer cassette mounted on the front load unit 20 by moving on the traveling mechanism 21.
- Each transfer robot 22 has two hands up and down. The upper hand is used when returning processed wafers to the wafer cassette. The lower hand is used when a wafer before processing is taken out from the wafer cassette. In this way, the upper and lower hands can be used properly. Further, the lower hand of the transfer robot 22 is configured so that the wafer can be reversed.
- the load / unload unit 2 is an area that needs to be kept clean, the pressure inside the load / unload unit 2 is higher than that of any of the outside of the processing apparatus, the polishing unit 3, and the cleaning unit 4. Is always maintained.
- the polishing unit 3 is the most dirty area because slurry is used as the polishing liquid. Accordingly, a negative pressure is formed inside the polishing unit 3, and the pressure is maintained lower than the internal pressure of the cleaning unit 4.
- the load / unload unit 2 is provided with a filter fan unit (not shown) having a clean air filter such as a HEPA filter, a ULPA filter, or a chemical filter. From the filter fan unit, clean air from which particles, toxic vapor, or toxic gas has been removed is constantly blown out.
- the polishing unit 3 is an area where the wafer is polished (flattened).
- the polishing unit 3 includes a first polishing module 3A, a second polishing module 3B, a third polishing module 3C, and a fourth polishing module 3D. As shown in FIG. 1, the first polishing module 3A, the second polishing module 3B, the third polishing module 3C, and the fourth polishing module 3D are arranged along the longitudinal direction of the processing apparatus.
- the first polishing module 3A includes a polishing table 30A to which a polishing pad (polishing tool) 10 having a polishing surface is attached, and holds the wafer against the polishing pad 10 on the polishing table 30A.
- Atomizer for removing slurry and polishing products on polishing surface and polishing pad residue due to dressing by injecting a mixed fluid or liquid (for example, pure water) of 33A, liquid (for example, pure water) and gas (for example, nitrogen gas) 34A.
- the second polishing module 3B includes a polishing table 30B, a top ring 31B, a polishing liquid supply nozzle 32B, a dresser 33B, and an atomizer 34B.
- the third polishing module 3C includes a polishing table 30C, a top ring 31C, a polishing liquid supply nozzle 32C, a dresser 33C, and an atomizer 34C.
- the fourth polishing module 3D includes a polishing table 30D, a top ring 31D, a polishing liquid supply nozzle 32D, a dresser 33D, and an atomizer 34D.
- first polishing module 3A Since the first polishing module 3A, the second polishing module 3B, the third polishing module 3C, and the fourth polishing module 3D have the same configuration, only the first polishing module 3A will be described below.
- FIG. 2 is a perspective view schematically showing the first polishing module 3A.
- the top ring 31 ⁇ / b> A is supported by the top ring shaft 36.
- the polishing pad 10 is affixed to the upper surface of the polishing table 30A.
- the upper surface of the polishing pad 10 forms a polishing surface for polishing the wafer W. Note that fixed abrasive grains may be used in place of the polishing pad 10.
- the top ring 31 ⁇ / b> A and the polishing table 30 ⁇ / b> A are configured to rotate around their axes as indicated by arrows.
- the wafer W is held on the lower surface of the top ring 31A by vacuum suction.
- the first linear transporter 6 is disposed adjacent to the first polishing module 3A and the second polishing module 3B.
- the first linear transporter 6 has four transfer positions along the direction in which the polishing modules 3A and 3B are arranged (first transfer position TP1, second transfer position TP2, and third transfer position in order from the load / unload unit side). TP3 and fourth transfer position TP4).
- the second linear transporter 7 is disposed adjacent to the third polishing module 3C and the fourth polishing module 3D.
- the second linear transporter 7 has three transfer positions along the direction in which the polishing modules 3C and 3D are arranged (a fifth transfer position TP5, a sixth transfer position TP6, and a seventh transfer position in order from the load / unload unit side). TP7).
- the wafer is transferred to the polishing modules 3A and 3B by the first linear transporter 6.
- the top ring 31A of the first polishing module 3A moves between the polishing position and the second transport position TP2 by the swing operation of the top ring head. Therefore, the wafer is transferred to the top ring 31A at the second transfer position TP2.
- the top ring 31B of the second polishing module 3B moves between the polishing position and the third transfer position TP3, and the delivery of the wafer to the top ring 31B is performed at the third transfer position TP3.
- the top ring 31C of the third polishing module 3C moves between the polishing position and the sixth transfer position TP6, and the delivery of the wafer to the top ring 31C is performed at the sixth transfer position TP6.
- the top ring 31D of the fourth polishing module 3D moves between the polishing position and the seventh transfer position TP7, and the delivery of the wafer to the top ring 31D is performed at the seventh transfer position TP7.
- a lifter 11 for receiving a wafer from the transfer robot 22 is disposed at the first transfer position TP1.
- the wafer is transferred from the transfer robot 22 to the first linear transporter 6 via the lifter 11.
- a shutter (not shown) is provided between the lifter 11 and the transfer robot 22 in the partition wall 1a. When the wafer is transferred, the shutter is opened so that the wafer is transferred from the transfer robot 22 to the lifter 11. It has become.
- a swing transporter 12 is disposed between the first linear transporter 6, the second linear transporter 7, and the cleaning unit 4.
- the swing transporter 12 has a hand that can move between the fourth transport position TP4 and the fifth transport position TP5. Wafer transfer from the first linear transporter 6 to the second linear transporter 7 is performed by the swing transporter 12.
- FIG. 3A is a plan view showing the cleaning unit 4
- FIG. 3B is a side view showing the cleaning unit 4. As shown in FIGS.
- the cleaning unit 4 includes a roll cleaning chamber 190, a first transfer chamber 191, a pen cleaning chamber 192, a second transfer chamber 193, a drying chamber 194, and a buffing process. It is divided into a chamber 300 and a third transfer chamber 195.
- the pressure balance among the polishing unit 3, the roll cleaning chamber 190, the pen cleaning chamber 192, the drying chamber 194, and the buff processing chamber 300 is as follows: drying chamber 194> roll cleaning chamber 190 and pen cleaning chamber 192> buff processing.
- Chamber 300 ⁇ polishing unit 3 can be established.
- the polishing unit uses a polishing liquid, and the buffing chamber may also be used as a buffing liquid. Therefore, by adjusting the pressure balance as described above, it is possible to prevent the cleaning of the particle components such as abrasive grains in the polishing liquid and the flow into the drying chamber, and thus the cleanliness of the cleaning and drying chamber can be maintained. It becomes possible.
- an upper roll cleaning module 201A and a lower roll cleaning module 201B arranged in the vertical direction are arranged.
- the upper roll cleaning module 201A is disposed above the lower roll cleaning module 201B.
- the upper roll cleaning module 201A and the lower roll cleaning module 201B clean the wafer by pressing two rotating sponges (first cleaning tools) against the front and back surfaces of the wafer while supplying the cleaning liquid to the front and back surfaces of the wafer. It is a washing machine.
- a temporary wafer holder 204 is provided between the upper roll cleaning module 201A and the lower roll cleaning module 201B.
- an upper pen cleaning module 202A and a lower pen cleaning module 202B arranged in the vertical direction are arranged.
- the upper pen cleaning module 202A is disposed above the lower pen cleaning module 202B.
- the upper pen cleaning module 202A and the lower pen cleaning module 202B press the rotating pencil sponge (second cleaning tool) against the wafer surface and swing it in the radial direction of the wafer while supplying the cleaning liquid to the wafer surface. Is a cleaning machine for cleaning a wafer.
- a temporary wafer placement table 203 is provided between the upper pen cleaning module 202A and the lower pen cleaning module 202B.
- an upper drying module 205A and a lower drying module 205B arranged in the vertical direction are arranged.
- the upper drying module 205A and the lower drying module 205B are isolated from each other.
- Filter fan units 207A and 207B for supplying clean air into the drying modules 205A and 205B are provided above the upper drying module 205A and the lower drying module 205B, respectively.
- the upper roll cleaning module 201A, the lower roll cleaning module 201B, the upper pen cleaning module 202A, the lower pen cleaning module 202B, the temporary placement table 203, the upper drying module 205A, and the lower drying module 205B are bolted to a frame (not shown). Fixed through.
- a first transfer robot (transfer mechanism) 209 that can move up and down is disposed in the first transfer chamber 191.
- a second transfer robot 210 that can move up and down is arranged in the second transfer chamber 193.
- a third transfer robot (transfer mechanism) 213 capable of moving up and down is arranged in the third transfer chamber 195.
- the first transfer robot 209, the second transfer robot 210, and the third transfer robot 213 are movably supported by support shafts 211, 212, and 214 that extend in the vertical direction.
- the first transfer robot 209, the second transfer robot 210, and the third transfer robot 213 have a drive mechanism such as a motor inside, and can move up and down along the support shafts 211, 212, and 214. ing.
- the first transfer robot 209 has two upper and lower hands like the transfer robot 22. As shown by the dotted line in FIG. 3A, the first transfer robot 209 is disposed at a position where the lower hand can access the temporary table 180 described above. When the lower hand of the first transfer robot 209 accesses the temporary table 180, a shutter (not shown) provided on the partition wall 1b is opened.
- the first transfer robot 209 includes a temporary placing table 180, an upper roll cleaning module 201A, a lower roll cleaning module 201B, a temporary placing table 204, a temporary placing table 203, an upper pen cleaning module 202A, and a lower pen cleaning module 202B. It operates so that the wafer W may be conveyed between.
- the first transfer robot 209 uses the lower hand when transferring the wafer before cleaning (wafer to which slurry is attached), and uses the upper hand when transferring the wafer after cleaning.
- the second transfer robot 210 operates to transfer the wafer W between the upper pen cleaning module 202A, the lower pen cleaning module 202B, the temporary placement table 203, the upper drying module 205A, and the lower drying module 205B. . Since the second transfer robot 210 transfers only the cleaned wafer, it has only one hand.
- the transfer robot 22 shown in FIG. 1 takes out the wafer from the upper drying module 205A or the lower drying module 205B using the upper hand, and returns the wafer to the wafer cassette.
- a shutter (not shown) provided on the partition wall 1a is opened.
- the buff processing chamber 300 includes an upper buff processing module 300A and a lower buff processing module 300B.
- the third transfer robot 213 transfers the wafer W between the upper roll cleaning module 201A, the lower roll cleaning module 201B, the temporary placement table 204, the upper buff processing module 300A, and the lower buff processing module 300B. Operate.
- the buff processing chamber 300, the roll cleaning chamber 190, and the pen cleaning chamber 192 are arranged in order from the far side from the load / unload unit 2 in the cleaning unit 4 .
- the arrangement mode of the buff processing chamber 300, the roll cleaning chamber 190, and the pen cleaning chamber 192 can be appropriately selected according to the quality and throughput of the wafer.
- the upper buff processing module 300A and the lower buff processing module 300B are provided is shown, but the present invention is not limited to this, and only one buff processing module may be provided.
- the roll cleaning module and the pen cleaning module are described as the modules for cleaning the wafer W in addition to the buff processing chamber 300.
- the present invention is not limited to this, and two-fluid jet cleaning (2FJ cleaning) ) Or megasonic cleaning.
- a micro droplet (mist) placed in a high-speed gas is ejected from the two-fluid nozzle toward the wafer W to collide with it, and a shock wave generated by the collision of the micro droplet on the wafer W surface is used.
- a shock wave generated by the collision of the micro droplet on the wafer W surface is used.
- particles or the like on the surface of the wafer W are removed (cleaned).
- the megasonic cleaning ultrasonic waves are applied to the cleaning liquid, and the action force due to the vibration acceleration of the cleaning liquid molecules is applied to the adhered particles such as particles to remove them.
- FIG. 4 is a diagram illustrating a schematic configuration of the upper buff processing module.
- the upper buff processing module 300A includes a buffing table 400 on which a wafer W is installed, a buff processing component 350, a liquid supply system 700 for supplying a buff processing liquid, and a buff pad 502. And a conditioning unit 800 for performing sharpening.
- the buff processing component 350 includes a buff head 500 in which a buff pad 502 for performing buff processing is attached to the processing surface of the wafer W, and a buff arm 600 that holds the buff head 500.
- the buffing liquid includes at least one of DIW (pure water), a cleaning chemical, and a polishing liquid such as a slurry.
- DIW pure water
- a cleaning chemical a cleaning chemical
- a polishing liquid such as a slurry.
- the other method is a method in which a predetermined amount of the processing target to which the contaminant is attached is removed by polishing or the like.
- the buffing liquid is preferably a cleaning chemical or DIW, and in the latter, a polishing liquid is preferred.
- the removal amount in the above processing is, for example, less than 10 nm, preferably 5 nm or less, which is desirable for maintaining the state of the surface to be processed (flatness and remaining film amount) after CMP.
- the removal rate is not as high as that of normal CMP.
- the processing speed may be adjusted by appropriately performing a treatment such as dilution on the polishing liquid.
- the buff pad 502 is formed of, for example, a foamed polyurethane hard pad, a suede soft pad, or a sponge. The type of the buff pad may be appropriately selected according to the material of the processing object and the state of the contaminant to be removed.
- a hard pad that can easily apply physical force to the contaminant that is, a pad having high hardness or rigidity
- a soft pad may be used to reduce damage to the surface to be processed.
- the buffing liquid is a polishing liquid such as slurry
- the removal speed of the object to be treated, the removal efficiency of contaminants, and the presence or absence of damage are not determined solely by the hardness or rigidity of the buff pad, so it may be selected as appropriate. good.
- the surface of these buff pads may be provided with groove shapes such as concentric grooves, XY grooves, spiral grooves, and radial grooves. Furthermore, at least one hole penetrating the buff pad may be provided in the buff pad, and the buff treatment liquid may be supplied through the main hole. Moreover, you may use the sponge-like material which can permeate
- the buff table 400 has a mechanism for adsorbing the wafer W. Further, the buffing table 400 can be rotated around the rotation axis A by a driving mechanism (not shown). Further, the buff table 400 may be configured to cause the wafer W to perform an angular rotation motion or a scroll motion by a driving mechanism (not shown).
- the buff pad 502 is attached to the surface of the buff head 500 that faces the wafer W.
- the buff head 500 can be rotated around the rotation axis B by a driving mechanism (not shown). Further, the buff head 500 can press the buff pad 502 against the processing surface of the wafer W by a driving mechanism (not shown).
- the buff arm 600 can move the buff head 500 within the radius or diameter of the wafer W as indicated by an arrow C. Further, the buff arm 600 can swing the buff head 500 to a position where the buff pad 502 faces the conditioning unit 800.
- the conditioning unit 800 is a member for conditioning the surface of the buff pad 502.
- the conditioning unit 800 includes a dress table 810 and a dresser 820 installed on the dress table 810.
- the dress table 810 can be rotated around the rotation axis D by a driving mechanism (not shown). Further, the dress table 810 may cause the dresser 820 to perform a scrolling motion by a driving mechanism (not shown).
- the dresser 820 is a diamond dresser in which diamond particles are electrodeposited and fixed on the surface, or diamond abrasive grains are arranged on the entire surface or part of the contact surface with the buff pad, and the resin brush bristles are in contact with the buff pad.
- the brush dresser is arranged on the entire surface or a part of it, or a combination thereof.
- the upper buff processing module 300A rotates the buff arm 600 until the buff pad 502 comes to a position facing the dresser 820.
- the upper buff processing module 300A performs conditioning of the buff pad 502 by rotating the dress table 810 around the rotation axis D, rotating the buff head 500, and pressing the buff pad 502 against the dresser 820.
- the conditioning load is ⁇ 80 N, and it is still better from the viewpoint of the life of the buff pad to be 40 N or less. Further, it is desirable to use the buff pad 502 and the dresser 820 at a rotation speed of 500 rpm or less.
- the upper buff processing module 300A can arrange the buff table 400 and the dress table 810 so that the processing surface of the wafer W and the dress surface of the dresser 820 are installed along the vertical direction.
- the buff arm 600 and the buff head 500 perform buff processing by bringing the buff pad 502 into contact with the processing surface of the wafer W arranged in the vertical direction, and buff pad against the dress surface of the dresser 820 arranged in the vertical direction. It arrange
- the liquid supply system 700 includes a pure water nozzle 710 for supplying pure water (DIW) to the processing surface of the wafer W.
- the pure water nozzle 710 is connected to a pure water supply source 714 via a pure water pipe 712.
- the pure water pipe 712 is provided with an on-off valve 716 that can open and close the pure water pipe 712.
- the control device 5 can supply pure water to the processing surface of the wafer W at an arbitrary timing by controlling the opening / closing of the on-off valve 716.
- the liquid supply system 700 includes a chemical liquid nozzle 720 for supplying a chemical liquid (Chemi) to the processing surface of the wafer W.
- the chemical solution nozzle 720 is connected to a chemical solution supply source 724 via a chemical solution pipe 722.
- the chemical solution pipe 722 is provided with an on-off valve 726 that can open and close the chemical solution pipe 722.
- the control device 5 can supply the chemical solution to the processing surface of the wafer W at an arbitrary timing by controlling the opening / closing of the on-off valve 726.
- the liquid supply system 700 includes a slurry nozzle 730 for supplying slurry to the processing surface of the wafer W.
- the slurry nozzle 730 is connected to a slurry supply source 734 via a slurry pipe 732.
- the slurry pipe 732 is provided with an on-off valve 736 that can open and close the slurry pipe 732.
- the control device 5 can supply slurry to the processing surface of the wafer W at an arbitrary timing by controlling opening and closing of the on-off valve 736.
- the upper buff processing module 300A supplies the processing liquid to the wafer W, rotates the buff table 400 around the rotation axis A, presses the buff pad 502 against the processing surface of the wafer W, and rotates the buff head 500 around the rotation axis B. While swinging in the direction of arrow C, the wafer W can be buffed.
- the conditions in the buff processing are basically this processing is defect removal by mechanical action, on the other hand, considering the reduction of damage to the wafer W, the pressure is 3 psi or less, preferably 2 psi or less. desirable.
- the rotational speeds of the wafer W and the buff head 500 are desirably 1000 rpm or less in consideration of the in-plane distribution of the buff processing liquid.
- the moving speed of the buff head 500 is 300 mm / sec or less.
- the distribution of the optimum movement speed differs depending on the rotation speed of the wafer W and the buff head 500 and the movement distance of the buff head 500, it is desirable that the movement speed of the buff head 500 is variable in the wafer W plane.
- a method of changing the moving speed for example, a method in which the swing distance in the wafer W plane is divided into a plurality of sections and the moving speed can be set for each section is desirable.
- the buff processing liquid flow rate a large flow rate is good in order to maintain a sufficient distribution of the processing liquid in the wafer surface even when the wafer W and the buff head 500 are rotated at a high speed.
- an increase in the flow rate of the processing liquid leads to an increase in processing cost.
- buffing includes at least one of buffing and buffing.
- the wafer W and the buff pad 502 are moved relative to each other while the buff pad 502 is in contact with the wafer W, and polishing such as slurry is interposed between the wafer W and the buff pad 502 to process the wafer W.
- polishing such as slurry is interposed between the wafer W and the buff pad 502 to process the wafer W.
- This is a process for polishing and removing the surface.
- the physical action force applied to the wafer W by the roll sponge in the roll cleaning chamber 190 and the physical action force applied to the wafer W by the pen sponge in the pen cleaning chamber 192 are stronger than the physical action force. This process can be added to W.
- the buffing treatment it is possible to realize removal of the surface layer portion to which contaminants are attached, additional removal of portions that could not be removed by the main polishing in the polishing unit 3, or improvement of morphology after the main polishing.
- the wafer W and the buff pad 502 are moved relative to each other while the buff pad 502 is brought into contact with the wafer W, and a cleaning process liquid (chemical solution or chemical solution and pure water) is interposed between the wafer W and the buff pad 502.
- a cleaning process liquid chemical solution or chemical solution and pure water
- contaminants on the surface of the wafer W are removed or the processing surface is modified.
- the physical action force applied to the wafer W by the roll sponge in the roll cleaning chamber 190 and the physical action force applied to the wafer W by the pen sponge in the pen cleaning chamber 192 are stronger than the physical action force. This process can be added to W.
- FIG. 5 is a schematic cross-sectional view of the vicinity of the buff head 500 of the buff processing apparatus according to the embodiment.
- the buff processing apparatus of this embodiment includes a rotatable shaft 510.
- the shaft 510 is connected to a rotation drive mechanism such as a motor (not shown).
- the shaft 510 extends downward from the buff arm 600.
- the shaft 510 is hollow.
- a pipe for passing a processing liquid such as slurry, chemical liquid, or pure water may be provided inside the shaft 510 so that the processing liquid is supplied from the inside of the buff head.
- a boss 511 is fixed to the shaft 510.
- the boss 511 has a cylindrical shape at least partially surrounding the entire circumference of the shaft 510.
- the boss 511 rotates with the shaft 510.
- a buff head flange 513 is fixed to a part below the boss 511.
- the buff head flange 513 has a generally disk-like structure.
- the buff head flange 513 is provided with a region through which a drive pin 514 and a bolt 517 described later are passed.
- the buff head flange 513 is also rotated by the rotation of the shaft 510 and the boss 511.
- a spherical plain bearing 520 is attached to the shaft 510. More specifically, the inner ring 520 a of the spherical plain bearing 520 is fixed to the shaft 510. An outer ring 520b is disposed outside the inner ring 520a.
- the outer surface of the inner ring 520a of the spherical plain bearing 520 is a spherical convex surface, and the inner surface of the outer ring 520b is a spherical concave surface.
- the spherical convex surface of the inner ring 520a and the spherical concave surface of the outer ring 520b can slide with each other, and constitute a gimbal mechanism.
- a buff head main body 512 is fixed to the outer ring 520b of the spherical plain bearing 520.
- a buff pad carrier 518 is attached to the lower surface of the buff head body 512.
- the buff pad carrier 518 is removably attached to the buff head body 512.
- a buff pad 502 is attached to the lower surface of the buff pad carrier 518.
- the buff pad 502 is for directly contacting the wafer W to buff the wafer W.
- the buff pad 502 is formed of, for example, a foamed polyurethane hard pad, a suede soft pad, or a sponge.
- a hard pad means one having an elastic modulus in the range of approximately 350 psi to 3,000 psi.
- a soft pad means one having an elastic modulus of approximately 50 psi to 300 psi.
- the buff head flange 513 and the buff head main body 512 are connected by a drive pin 514. Therefore, the rotational torques of the shaft 510, the boss 511, and the buff head flange 513 are transmitted to the buff head main body 512.
- the buff head body 512 is driven to rotate, the buff pad carrier 518 and the buff pad 502 can be driven to rotate.
- the gimbal mechanism is configured by the spherical plain bearing 520, the buff head main body 512 can be tilted along the slide surface of the spherical plain bearing 520 while rotating.
- the spring constant of the spring 516 is selected in consideration of the force for supporting the buff head body 512, the load applied to the gimbal operation, and the like.
- the buff processing apparatus includes a cover 550 that surrounds the buff head 500.
- the cover 550 is for preventing liquid such as processing liquid from entering the buff head 500.
- the detailed structure of the cover 550 will be described later.
- FIG. 6 is a top sectional view of the buff head 500 shown in FIG.
- three drive pins 514 and three springs 516 are alternately arranged at equal intervals in the circumferential direction of the buff head 500.
- the number of drive pins 514 and springs 516 may not be three, for example, two.
- four or more drive pins 514 and springs 516 may be alternately arranged at equal intervals in the circumferential direction of the buff head 500. It is considered that the larger number of drive pins 514 and springs 516 can improve the in-plane uniformity of the wafer W during the buffing process.
- the shaft 510 is moved downward so that the downward force causes the shaft 510, the inner ring 520a, the outer ring 520b of the spherical plain bearing 520, the buff head body 512, and the buff pad.
- the carrier 518 and the buff pad 502 are transmitted, and the buff pad 502 can be pressed against the wafer W.
- the lifting force is increased by moving the shaft 510 upward so that the shaft 510, the boss 511, the buff head flange 513, the spring 516, the bolt 517, the buff head main body 512, This is transmitted to the buff pad carrier 518 and the buff head 502, and the buff pad 502 is separated from the wafer W.
- FIG. 7 is a schematic cross-sectional view of the vicinity of the buff head 500 of the buff processing apparatus according to one embodiment.
- the embodiment shown in FIG. 7 includes a shaft 510, a boss 511, a buff head body 512, a buff head carrier 518, and a buff pad 502, as in the embodiment shown in FIG.
- a ring-shaped bellows type coupling 522 is provided instead of the buff head flange 513, the drive pin 514, and the spring 516 of the embodiment of FIG. 5.
- the bellows type coupling 522 has one end fixed to the boss 511 and the other end fixed to the buff head main body 512.
- the bellows type coupling 522 functions as both the drive pin 514 and the spring 516 in the embodiment of FIG. 5, transmits the rotational torque of the shaft 510 to the buff head body 512, and elastically moves the buff head body 512. To support.
- the bellows type coupling 522 is used as in the embodiment of FIG. 7, the number of parts can be reduced as compared with the embodiment of FIG. 5, and the entire circumference of the buff head body 512 can be elastically supported. There is a merit that it is possible.
- the embodiment using the drive pin 514 and the spring 516 in FIG. 5 has an advantage that there are many options for the spring constant of the spring 516 as compared with the embodiment using the bellows type coupling 522.
- the embodiment shown in FIG. 7 does not include the spherical plain bearing 520 as shown in FIG.
- the head support 524 is fixed to the lower side of the boss 511.
- the lower surface of the head column portion 524 includes a spherical concave surface that comes into contact with the buff head main body 512.
- the region in contact with the head column portion 524 of the buff head main body 512 has a spherical convex surface.
- the spherical concave surface of the head column portion 524 and the spherical convex surface of the buff head main body 512 can slide and form a gimbal mechanism.
- the center of rotation of the gimbal mechanism is approximately near the surface of the buff pad 502. In one embodiment, the center of rotation of the gimbal can be within a range of 10 mm from the surface of the buff pad 502. As one embodiment, when a soft pad is used as the buff pad 502, the rotation center of the gimbal mechanism is set such that the distance from the surface of the buff pad 502 is 0.1 times or less the diameter of the buff pad 502.
- the rotation center of the gimbal mechanism is set such that the distance from the surface of the buff pad 502 is 0.3 times or less the diameter of the buff pad 502.
- the center of rotation of the gimbal mechanism is near the surface of the buff pad 502, so that cocking during the buffing process can be prevented or alleviated.
- the soft pad is more susceptible to cocking than the hard pad, so when using the soft pad, it is desirable to make the center of rotation of the gimbal mechanism closer to the surface of the buff pad than when using the hard pad. .
- the buff processing apparatus includes a support member 526.
- the support member 526 is fixed to the buff head main body 512.
- the support member 526 is disposed so that a part of the lower surface thereof overlaps a part of the head column part 524 in the axial direction. However, there is a gap between the head column portion 524 and the support member 526, and the head column portion 524 and the support member 526 are configured not to contact except when the buff head 500 is lifted from the wafer W.
- the shaft 510 is moved downward, so that the downward force causes the shaft 510, the boss 511, the head column portion 524, the buff head body 512, the buff pad carrier 518, It is transmitted to the buff pad 502, and the buff pad 502 can be pressed against the wafer W.
- the head support 524 does not contact the support member 526.
- the lifting force is transmitted to the shaft 510, the boss 511, and the head column 524 by moving the shaft 510 upward, and the head column 524 is moved upward. Lifted to. As the head column 524 is lifted upward, the head column 524 and the support member 526 come into contact with each other. At this time, the spherical concave surface of the head support 524 constituting the gimbal mechanism is separated from the spherical convex surface of the buff head main body 512.
- the lifting force is transmitted to the head support 524, the support member 526, the buff head main body 512, the buff pad carrier 518, and the buff pad 502, and the buff pad 502 is separated from the wafer W. Therefore, when the buff pad 502 is pulled up from the wafer W, the buff head main body 512 is stably supported by the head column portion 524, and it is possible to prevent the slurry or the like attached to the buff head from falling during the buff processing.
- FIG. 8 is a schematic cross-sectional view of the vicinity of the buff head 500 of the buff processing apparatus according to one embodiment.
- the shaft 510, the boss 511, the buff head flange 513, the buff head body 512, the drive pin 514, the spring 516, the buff head carrier 518, and the buff pad, as in the embodiment shown in FIG. 502 is provided.
- the spherical plain bearing 520 as shown in FIG. 5 is not provided.
- the gimbal mechanism is configured by the spherical concave surface of the head column portion 524 and the spherical convex surface of the buff head body 512, as in the embodiment of FIG. 7.
- the rotational center of the gimbal mechanism of the embodiment shown in FIG. 8 is at a position lower than the rotational center of the gimbal mechanism of the embodiment shown in FIG. 5, similarly to the embodiment shown in FIG. 7.
- the buff processing apparatus includes a support member 526 fixed to the buff head main body 512, similarly to the buff processing apparatus shown in FIG.
- the shaft 510 is moved downward, so that the downward force causes the shaft 510, the boss 511, the head column portion 524, the buff head body 512, the buff pad carrier 518, It is transmitted to the buff pad 502, and the buff pad 502 can be pressed against the wafer W.
- the head support 524 does not contact the support member 526.
- the lifting force is transmitted to the shaft 510, the boss 511, and the head column 524 by moving the shaft 510 upward, and the head column 524 is moved upward. Lifted to. As the head column 524 is lifted upward, the head column 524 and the support member 526 come into contact with each other. At this time, the spherical concave surface of the head support 524 constituting the gimbal mechanism is separated from the spherical convex surface of the buff head main body 512.
- the lifting force is transmitted to the head support 524, the support member 526, the buff head main body 512, the buff pad carrier 518, and the buff pad 502, and the buff pad 502 is separated from the wafer W. Therefore, when the buff pad 502 is pulled up from the wafer W, the buff head main body 512 is stably supported by the head column portion 524, and it is possible to prevent the slurry or the like attached to the buff head from falling during the buff processing.
- the force of the spring 516 is not used, and the head column 524 and the support member 526 are not used. Is used. Therefore, in the embodiment shown in FIG. 8, the spring constant of the spring 516 can be made smaller than the spring constant of the spring 516 of the embodiment of FIG.
- the cover 550 is formed of a substantially cylindrical member that surrounds the outer periphery of the buff head 500.
- FIG. 9A is an enlarged view of the cover 550 shown in FIG.
- the cover 550 includes an outer cover 550a and an inner cover 550b.
- the outer cover part 550 a is attached to the stationary part of the buff head 500. That is, even when the buff head 500 rotates, the outer cover 550a does not rotate.
- the inner cover 550 b is attached to the rotating portion of the buff head 500. That is, when the buff head 500 rotates, the inner cover 550b also rotates.
- the outer cover 550a includes a first cover member 552a and a second cover member 560a attached to the first cover member 552a.
- the first cover member 552a includes an axial portion 554a extending in a direction along the rotation axis (shaft 510) of the buff head 500, and an outer protrusion 556a extending outward from the axial portion 554a.
- the second cover member 560a includes an axial portion 562a extending in a direction along the rotation axis (shaft 510) of the buff head 500, and an inner protrusion 564a extending inward from the axial portion 562a.
- the outer protrusion 556a of the first cover member 552a and the inner protrusion 564a of the second cover member 560a engage in a direction along the rotation axis.
- the inner protrusion 564a is slidable with respect to the outer surface of the axial portion 554a of the first cover member 552a. Therefore, the second cover member 560a can be slid with respect to the first cover member 552a. With this configuration, the inside of the buff head 500 can be easily accessed without removing the outer cover 550a, and maintenance work for the buff head 500 can be performed without removing the outer cover 550a.
- the inner cover 550b includes a first cover member 552b and a second cover member 560b attached to the first cover member 552b.
- the first cover member 552b includes an axial portion 554b extending in a direction along the rotation axis (shaft 510) of the buff head 500, and an outer protrusion 556b extending outward from the axial portion 554b.
- a lower surface 558 b (surface facing the wafer W) of the outer protrusion 556 b is inclined with respect to a surface (wafer W surface) perpendicular to the rotation axis of the buff head 500.
- the inclination angle of the lower surface 558b of the outer protrusion 556b is about 45 degrees, and is inclined so that the outer side of the outer protrusion 556b is located below.
- the first cover member 552b of the inner cover 550b includes a hole 553b through which a screw 580 described later is passed.
- the second cover member 560b of the inner cover 550b can be configured to be divided into three parts, and one second cover member can be configured to surround one third of the periphery of the buff head 500.
- the second cover member 560b of the inner cover 550b includes an axial portion 562b extending in a direction along the rotation axis (shaft 510) of the buff head 500.
- An upper surface 564b of the axial portion 562b (a surface facing the opposite direction of the wafer W) is inclined with respect to a surface (wafer W surface) perpendicular to the rotation axis of the buff head 500.
- the angle of inclination of the upper surface 564b of the axial portion 562b is about 45 degrees and is inclined such that the inner side of the axial portion 562b is located further downward.
- the upper surface 564b engages with the lower surface 558b of the first cover member 552b when the second cover member 560b is attached to the first cover member 552b.
- the axial portion 562b includes a slot 566b for threading the screw 580. Slot 566b extends upward from the lower edge of axial portion 562b.
- FIG. 9B is a view of the slot 566b of the second cover member 560b of the inner cover 550b of FIG. 9A as viewed from the direction of the arrow 9B.
- the size of the slot 566b is a size that allows the screw 580 to relatively move within the slot 566b.
- the axial portion 562b of the second cover member 560b of the inner cover 550b includes a step portion 568b.
- the screw head of the screw 580 is stepped. Engage with the portion 568b. At this time, the shaft portion of the screw 580 does not contact the upper end of the slot 566b.
- the first cover member 552b and the second cover member 560b of the inner cover 550b can be connected together to the buff head main body 512 by screws 580.
- the screw 580 By loosening the screw 580, the engagement between the screw head and the step portion 568b is released, and the second cover member 560b can be moved downward by the slot 566b. Therefore, the engagement between the lower surface 558b of the first cover member 552b and the upper surface 564b of the second cover member 560b is released, and the second cover member 560 is removed from the first cover member 552b without completely removing the screw 580. Can do. With this configuration, the screw 580 can be prevented from dropping, and the inside of the buff head 500 can be easily accessed during maintenance.
- the outer cover 550a and the inner cover 550b are configured to be separable from each other in the axial direction.
- 10A, 10B, and 10C are views showing a state when the outer cover 550a and the inner cover 550b are separated.
- FIG. 10A shows a state where the outer cover 550a and the inner cover 550b are close to each other and the buff head 500 is raised.
- FIG. 10B shows a state where the outer cover 550a and the inner cover 550b are separated by lowering the buff head 500.
- FIG. 10C is a diagram illustrating a state in which the second cover member 560a of the outer cover 550a is slid upward with respect to the first cover member 552a, the buff head 500 is lowered, and the inner cover 550b is lowered.
- FIG. 10C is a diagram showing a state where the second cover member 560b of the inner cover 550b is removed and the first cover member 552b of the inner cover 550b is lowered.
- the inside of the buff head 500 can be easily accessed and maintenance can be performed.
- the order of lowering the buff head 500, sliding the outer cover 550a upward on the second cover member 560a, and lowering the inner cover 550b is arbitrary. For example, (1) after the outer cover 550a and the inner cover 550b are separated by lowering the buff head 500, (2) the second cover member 560b of the inner cover 550b is removed and the first cover member 552b of the inner cover 550b is removed.
- the second cover member 560a of the outer cover 550a can be slid upward to perform maintenance.
- (1) after removing the second cover member 560b of the inner cover 550b and lowering the first cover member 552b of the inner cover 550b, (2) lowering the buff head 500 to lower the outer cover 550a Maintenance may be performed by separating the inner cover 550b and then (3) sliding the second cover member 560a of the outer cover 550a upward.
- the present invention is not limited to the above-described embodiments.
- the features of the above-described embodiments can be combined or exchanged as long as they do not contradict each other.
- the substrate is disposed sideways so that the processing surface of the substrate faces upward, and the buff head is pressed from above the substrate to perform buffing, but the substrate is oriented vertically. It may be arranged to buff the buff head by pressing it against the substrate from the side.
- a buffing apparatus for buffing a substrate includes a rotatable shaft, a buff head body, a torque transmission mechanism for transmitting rotation of the shaft to the buff head body, and an elastic elastically supporting the buff head body in the longitudinal direction of the shaft. And a member.
- the torque transmission mechanism and the elastic member include the bellows type coupling, and one end of the bellows type coupling is directly provided. The other end is connected to the buff head body.
- the torque transmission mechanism includes a drive pin for transmitting the rotation of the shaft to the buff head body, and the elastic member is Including springs.
- the number of the drive pins and the springs is three or more, and they are arranged at equal intervals on the entire circumference of the buff head body.
- a buff pad carrier that is detachably attached to the buff head body, and the buff pad carrier And a buff pad to be attached.
- the buff processing apparatus includes a gimbal mechanism that slidably supports the buff head body.
- the rotation center of the gimbal mechanism is configured to be near the surface of the buff pad with the buff pad attached.
- the rotation center of the gimbal mechanism is within a range of 10 mm from the surface of the buff pad with the buff pad attached.
- the gimbal mechanism has a spherical plain bearing.
- the buff processing device is directly or indirectly fixed to the shaft.
- a support member fixed to the buff head main body the shaft is movable in the longitudinal direction of the shaft, and the head support portion is configured to support the substrate when the substrate is buffed.
- the buff head body is configured to come into contact with the support member when the buff head body moves away from the substrate.
- the head column portion has a spherical concave surface that comes into contact with the buff head body, and the buff head body has the spherical shape.
- the gimbal mechanism is configured by the spherical concave surface of the head column portion and the spherical convex surface of the buff head body.
- the shaft, the buff head body, the torque transmission mechanism, and the elastic member are at least partially. Has an enclosing cover.
- a cover attachable to a rotatable buff head used in a buff processing apparatus for buffing a substrate includes a first cover member and a second cover member attached to the first cover member, and the second cover member is configured to be slidable with respect to the first cover member.
- the first cover member in the cover of the thirteenth mode, includes an axial portion extending in a direction along the rotation axis of the buff head, and an outer side extending outward from the axial portion.
- the second cover member has an axial portion extending in a direction along the rotation axis of the buff head, and an inner protruding portion extending inward from the axial portion, and the outer protruding portion.
- the inner protrusion can be engaged in a direction along the rotation axis, and the inner protrusion can slide with respect to the outer surface of the axial portion of the first cover member.
- the cover is configured to be attached to a stationary part of the buff head.
- a cover that can be attached to a rotatable buff head used in a buff processing apparatus for buffing a substrate.
- the cover includes a first cover member and a second cover member attached to the first cover member, and the second cover member is configured to be removable from the first cover member.
- the first cover member projects in an axial direction extending in a direction along the rotation axis of the buff head, and protrudes outward from the axial direction portion.
- An outer protrusion having an inclined surface inclined with respect to a surface perpendicular to the rotation axis
- the second cover member includes an axial portion extending in a direction along the rotation axis of the buff head, and the first An inclined surface engageable with the inclined surface of the cover member.
- the second cover member is composed of a plurality of cover members that can be divided, and each of the plurality of cover members is a first one. 1 It is comprised so that attachment to a cover member is possible.
- the cover has a fastener for fixing the first cover member and the second cover member, In a state where the first cover member and the second cover member are fixed, the inclined portion of the first cover member is engaged with the inclined portion of the second cover member, and the fastener is loosened. Thus, the engagement between the inclined portion of the first cover member and the inclined portion of the second cover member is released.
- the first cover member has a hole having a dimension through which the fastener passes, and the second cover member passes through the fastener.
- the second cover member can be removed from the fastener through the slot without removing the fastener in a state where the fastener is loosened.
- the cover in the cover of any one of the sixteenth to twentieth embodiments, is configured to be attached to a rotating part of the buff head.
- a substrate processing apparatus includes a buff processing apparatus according to any one of the first to twelfth aspects, a transport mechanism for transporting a substrate, a cleaning unit for cleaning the substrate, and drying for drying the substrate. And a unit.
- a maintenance method for a buff processing apparatus having a first cover and a second cover attached to the inside of the first cover.
- the step of lowering the buff head of the buff processing device, the shaft main body to which the first cover is attached, and the buff head to which the second cover is attached are separated in the axial direction, and the first cover And a step of separating the second cover, and a second cover member configured to be slidable in the axial direction with respect to the first cover member fixed to the shaft main body of the first cover.
- the order of the step of lowering the buff head, the step of sliding the second member of the first cover member, and the step of sliding the first cover member of the second cover is arbitrary. .
- Patent Document 1 Japanese Patent Application Laid-Open No. 2010-50436
- Patent Document 2 Japanese Patent Application Laid-Open No. 11-162893
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- Microelectronics & Electronic Packaging (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Cleaning Or Drying Semiconductors (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
Description
<処理装置>
図1は、本発明の一実施形態に係る処理装置の全体構成を示す平面図である。図1に示すように、処理対象物に処理を行うための処理装置(CMP装置)1000は、略矩形状のハウジング1を備える。ハウジング1の内部は、隔壁1a,1bによって、ロード/アンロードユニット2と、研磨ユニット3と、洗浄ユニット4と、に区画される。ロード/アンロードユニット2、研磨ユニット3、及び洗浄ユニット4は、それぞれ独立に組み立てられ、独立に排気される。また、洗浄ユニット4は、処理装置に電源を供給する電源供給部と、処理動作を制御する制御装置5と、を備える。
<ロード/アンロードユニット>
ロード/アンロードユニット2は、多数の処理対象物(例えば、ウェハ(基板))をストックするウェハカセットが載置される2つ以上(本実施形態では4つ)のフロントロード部20を備える。これらのフロントロード部20は、ハウジング1に隣接して配置され、処理装置の幅方向(長手方向と垂直な方向)に沿って配列される。フロントロード部20には、オープンカセット、SMIF(Standard Manufacturing Interface)ポッド、又はFOUP(Front Opening Unified Pod)を搭載することができるようになっている。ここで、SMIF及びFOUPは、内部にウェハカセットを収納し、隔壁で覆うことにより、外部空間とは独立した環境を保つことができる密閉容器である。
<研磨ユニット>
研磨ユニット3は、ウェハの研磨(平坦化)が行われる領域である。研磨ユニット3は、第1研磨モジュール3A、第2研磨モジュール3B、第3研磨モジュール3C、及び、第4研磨モジュール3Dを備えている。第1研磨モジュール3A、第2研磨モジュール3B、第3研磨モジュール3C、及び第4研磨モジュール3Dは、図1に示すように、処理装置の長手方向に沿って配列される。
<搬送機構>
次に、ウェハを搬送するための搬送機構について説明する。図1に示すように、第1研磨モジュール3A及び第2研磨モジュール3Bに隣接して、第1リニアトランスポータ6が配置されている。第1リニアトランスポータ6は、研磨モジュール3A,3Bが配列する方向に沿った4つの搬送位置(ロード/アンロードユニット側から順番に第1搬送位置TP1、第2搬送位置TP2、第3搬送位置TP3、第4搬送位置TP4とする)の間でウェハを搬送する機構である。
<洗浄ユニット>
図3Aは洗浄ユニット4を示す平面図であり、図3Bは洗浄ユニット4を示す側面図である。図3A及び図3Bに示すように、洗浄ユニット4は、ここではロール洗浄室190と、第1搬送室191と、ペン洗浄室192と、第2搬送室193と、乾燥室194と、バフ処理室300と、第3搬送室195と、に区画されている。なお、研磨ユニット3、ロール洗浄室190、ペン洗浄室192、乾燥室194、及びバフ処理室300の各室間の圧力バランスは、乾燥室194>ロール洗浄室190及びペン洗浄室192>バフ処理室300≧研磨ユニット3とすることができる。研磨ユニットでは研磨液を使用しており、バフ処理室についてもバフ処理液として研磨液を使用することがある。よって、上記のような圧力バランスにすることで、特に研磨液中の砥粒といったパーティクル成分の洗浄及び乾燥室への流入を防止することが可能であり、よって洗浄及び乾燥室の清浄度維持が可能となる。
<バフ処理モジュール>
図4は、上側バフ処理モジュールの概略構成を示す図である。図4に示すように、上側バフ処理モジュール300Aは、ウェハWが設置されるバフテーブル400と、バフ処理コンポーネント350と、バフ処理液を供給するための液供給系統700と、バフパッド502のコンディショニング(目立て)を行うためのコンディショニング部800と、を備える。バフ処理コンポーネント350は、ウェハWの処理面にバフ処理を行うためのバフパッド502が取り付けられたバフヘッド500と、バフヘッド500を保持するバフアーム600と、を備える。
502 バフパッド
510 シャフト
511 ボス
512 バフヘッド本体
513 バフヘッドフランジ
514 駆動ピン
516 ばね
517 ボルト
518 バフパッドキャリア
520 球面滑り軸受
520a 内輪
520b 外輪
522 ベローズ型カップリング
524 ヘッド支柱部
526 支持部材
550 カバー
550a 外側カバー
550b 内側カバー
552a 第1カバー部材
560a 第2カバー部材
554a 軸方向部分
556a 外側突出部
562a 軸方向部分
564a 内側突出部
552b 第1カバー部材
560b 第2カバー部材
553b 孔
554b 軸方向部分
556b 外側突出部
558b 下面
562b 軸方向部分
564b 上面
566b スロット
568b 段部
580 ネジ
Claims (24)
- 基板をバフ処理するためのバフ処理装置であって、
回転可能なシャフトと、
バフヘッド本体と、
前記シャフトの回転を前記バフヘッド本体に伝達するためのトルク伝達機構と、
前記バフヘッド本体を前記シャフトの長手方向に弾性的に支持する弾性部材と
を有する、
バフ処理装置。 - 請求項1に記載のバフ処理装置であって、
前記トルク伝達機構および前記弾性部材は、前記ベローズ型カップリングを含み、
前記ベローズ型カップリングは、一端が直接的または間接的に前記シャフトに連結され、他端が前記バフヘッド本体に連結される、
バフ処理装置。 - 請求項1に記載のバフ処理装置であって、
前記トルク伝達機構は、前記シャフトの回転を前記バフヘッド本体に伝達するための駆動ピンを含み、
前記弾性部材は、ばねを含む、
バフ処理装置。 - 請求項3に記載のバフ処理装置であって、
前記駆動ピンおよび前記ばねは、それぞれ3個以上であり、それぞれ前記バフヘッド本体の全周に等間隔で配置される、
バフ処理装置。 - 請求項1乃至4のいずれか一項に記載のバフ処理装置であって、
前記バフヘッド本体に取り外し可能に取り付けられるバフパッドキャリアと、
前記バフパッドキャリアに取り付けられるバフパッドと、を有する、
バフ処理装置。 - 請求項1乃至5のいずれか一項に記載のバフ処理装置であって、
前記バフヘッド本体を滑動可能に支持するジンバル機構を有する、
バフ処理装置。 - 請求項6に記載のバフ処理装置であって、
前記ジンバル機構の回転中心は、バフパッドが取り付けられた状態で、バフパッドの表面付近になるように構成される、
バフ処理装置。 - 請求項7に記載のバフ処理装置であって、
前記ジンバル機構の回転中心は、バフパッドが取り付けられた状態で、バフパッドの表面から10mmの範囲内にある、
バフ処理装置。 - 請求項6乃至8のいずれか一項に記載のバフ処理装置であって、
前記ジンバル機構は球面滑り軸受を有する、
バフ処理装置。 - 請求項1乃至9のいずれか一項に記載のバフ処理装置であって、
前記バフ処理装置は、前記シャフトに直接的または間接的に固定されるヘッド支柱部と、
前記バフヘッド本体に固定される支持部材と、を有し、
前記シャフトは、前記シャフトの長手方向に移動可能であり、
前記ヘッド支柱部は、基板をバフ処理しているときは前記支持部材から離間し、前記バフヘッド本体が基板から離れる方向に移動するときに、前記支持部材に接触するように構成される、
バフ処理装置。 - 請求項10に記載のバフ処理装置であって、
前記ヘッド支柱部は、前記バフヘッド本体に接触する球面状の凹面を有し、
前記バフヘッド本体は、前記球面状の凹面に接触する球面状の凸面を有し、
前記ジンバル機構は、前記ヘッド支柱部の前記球面状の凹面、および前記バフヘッド本体の球面状の凸面により構成される、
バフ処理装置。 - 請求項1乃至9のいずれか一項に記載のバフ処理装置であって、
前記シャフト、前記バフヘッド本体、前記トルク伝達機構、および前記弾性部材を少なくとも部分的に囲うカバーを有する、
バフ処理装置。 - 基板をバフ処理するためのバフ処理装置に使用される回転可能なバフヘッドに取り付け可能なカバーであって、
第1カバー部材と、
前記第1カバー部材に取り付けられる第2カバー部材と、を有し、
前記第2カバー部材は、前記第1カバー部材に対してスライド可能に構成される、
カバー。 - 請求項13に記載のカバーであって、
前記第1カバー部材は、バフヘッドの回転軸に沿う方向に延びる軸方向部分と、前記軸方向部分から外側に延びる外側突出部と、を有し、
前記第2カバー部材は、バフヘッドの回転軸に沿う方向に延びる軸方向部分と、前記軸方向部分から内側に延びる内側突出部と、を有し、
前記外側突出部と前記内側突出部とは回転軸に沿う方向に係合可能であり、前記内側突出部は、前記第1カバー部材の軸方向部分の外側表面に対してスライド可能である、
カバー。 - 請求項13または14に記載のカバーであって、
前記カバーは、バフヘッドの静止部分に取り付けられるように構成される、
カバー。 - 基板をバフ処理するためのバフ処理装置に使用される回転可能なバフヘッドに取り付け可能なカバーであって、
第1カバー部材と、
前記第1カバー部材に取り付けられる第2カバー部材と、を有し、
前記第2カバー部材は、前記第1カバー部材から取り外し可能に構成される、
カバー。 - 請求項16に記載のカバーであって、
前記第1カバー部材は、バフヘッドの回転軸に沿う方向に延びる軸方向部分と、前記軸方向部分から外側に突出し且つ前記回転軸に垂直な面に対して傾斜した傾斜面を有する、外側突出部と、を有し、
前記第2カバー部材は、バフヘッドの回転軸に沿う方向に延びる軸方向部分と、前記第1カバー部材の前記傾斜面に係合可能な傾斜面と、を有する、
カバー。 - 請求項16または17に記載のカバーであって、
前記第2カバー部材は、分割可能な複数のカバー部材から構成され、前記複数のカバー部材は、それぞれ第1カバー部材に取り付け可能に構成される、
カバー。 - 請求項16乃至18のいずれか一項に記載のカバーであって、
前記第1カバー部材と前記第2カバー部材とを固定するためのファスナを有し、
前記第1カバー部材と前記第2カバー部材とが固定された状態で、前記第1カバー部材の前記傾斜部と、前記第2カバー部材の傾斜部とが係合し、
前記ファスナが緩められた状態で、前記第1カバー部材の前記傾斜部と、前記第2カバー部材の傾斜部との係合が解除される、
カバー。 - 請求項19に記載のカバーであって、
前記第1カバー部材は、前記ファスナが通る寸法を備える孔を有し、
前記第2カバー部材は、前記ファスナが通るためのスロットを有し、
前記ファスナを緩めた状態で、前記ファスナを取り外すことなく、前記第2カバー部材を、前記スロットを通じて前記ファスナから取り外し可能である、
カバー。 - 請求項16乃至20のいずれか一項に記載のカバーであって、
前記カバーは、バフヘッドの回転部分に取り付けられるように構成される、
カバー。 - 請求項21に記載のカバーであって、
前記カバーは、請求項1乃至12のいずれか一項のバフ処理装置のバフヘッド本体に取り付けられる、
カバー。 - 基板処理装置であって、
請求項1乃至12のいずれか一項に記載のバフ処理装置と、
基板を搬送するための搬送機構と、
基板を洗浄するための洗浄ユニットと、
基板を乾燥させるための乾燥ユニットと、を有する、
基板処理装置。 - 第1カバーと、前記第1カバーの内側に取り付けられた第2カバーとを有するバフ処理装置のメンテナンス方法であって、
前記バフ処理装置のバフヘッドを下降させる工程と、
前記第1カバーが取り付けられた軸本体と、前記第2カバーが取り付けられた前記バフヘッドとを軸方向に離間させ、前記第1カバーと前記第2カバーとを分離させる工程と、
前記第1カバーのうち、前記軸本体に固定された第1カバー部材に対して、軸方向にスライド可能に構成された第2カバー部材を軸方向上方にスライドさせる工程と、
前記第2カバーのうち、前記バフヘッドに取り付けられた第2カバー部材を前記バフヘッドから外し、前記第2カバーの第1カバー部材を軸方向にスライドさせる工程と、
を有する、バフ処理装置のメンテナンス方法。
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IT201900016721A1 (it) | 2019-09-19 | 2021-03-19 | Simec Spa | Testa per una macchina utensile di lucidatura e/o calibratura di lastre in materiale lapideo e/o ceramico |
TWI819035B (zh) * | 2018-07-31 | 2023-10-21 | 日商荏原製作所股份有限公司 | 具備球面軸承之連結機構、球面軸承之軸承半徑決定方法、及基板研磨裝置 |
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