WO2020226095A1 - 接合装置、接合システム及び接合方法 - Google Patents
接合装置、接合システム及び接合方法 Download PDFInfo
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- WO2020226095A1 WO2020226095A1 PCT/JP2020/018011 JP2020018011W WO2020226095A1 WO 2020226095 A1 WO2020226095 A1 WO 2020226095A1 JP 2020018011 W JP2020018011 W JP 2020018011W WO 2020226095 A1 WO2020226095 A1 WO 2020226095A1
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- Prior art keywords
- substrate
- imaging unit
- imaging
- holding portion
- holding
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- 239000000758 substrate Substances 0.000 claims abstract description 311
- 230000007246 mechanism Effects 0.000 claims abstract description 95
- 238000003384 imaging method Methods 0.000 claims description 276
- 238000005304 joining Methods 0.000 claims description 128
- 238000012545 processing Methods 0.000 claims description 95
- 230000003287 optical effect Effects 0.000 claims description 16
- 238000006116 polymerization reaction Methods 0.000 claims description 15
- 238000012546 transfer Methods 0.000 description 28
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- 238000003708 edge detection Methods 0.000 description 4
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- 239000004065 semiconductor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
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- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005411 Van der Waals force Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 239000010703 silicon Substances 0.000 description 1
Images
Classifications
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- 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
- H01L21/68—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for positioning, orientation or alignment
- H01L21/681—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for positioning, orientation or alignment using optical controlling means
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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
- H01L21/185—Joining of semiconductor bodies for junction formation
- H01L21/187—Joining of semiconductor bodies for junction formation by direct bonding
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- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67739—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations into and out of processing chamber
- H01L21/67748—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations into and out of processing chamber horizontal transfer of a single workpiece
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- H01L21/6831—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using electrostatic chucks
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- H01L21/687—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
- H01L21/68742—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by a lifting arrangement, e.g. lift pins
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- H01L21/687—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
- H01L21/68764—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by a movable susceptor, stage or support, others than those only rotating on their own vertical axis, e.g. susceptors on a rotating caroussel
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- H01L2223/54453—Marks applied to semiconductor devices or parts for use prior to dicing
Definitions
- the present disclosure relates to a joining device, a joining system and a joining method.
- Patent Document 1 discloses a joining device for joining substrates to each other.
- the joining device is provided outside the chamber, a first holding portion for holding the first substrate, a second holding portion for holding the second substrate, a chamber for accommodating the first holding portion and the second holding portion, and a chamber. It has an imaging unit.
- the image pickup unit images the alignment marks formed on the first substrate and the second substrate through the through holes formed in the chamber, the first holding portion, and the second holding portion, respectively.
- the technology according to the present disclosure improves the joining accuracy when joining substrates to each other.
- One aspect of the present disclosure is a joining device for joining a first substrate and a second substrate, wherein a first holding portion for holding the first substrate and a first holding portion are arranged to face each other and the second substrate is formed.
- the second holding portion that holds the image, the first imaging unit that images the first alignment mark formed on the joint surface of the first substrate, and the second alignment mark formed on the joint surface of the second substrate are imaged.
- the two imaging units are moved along the first direction in a plane region between the first holding portion and the second holding portion and the two imaging units provided with the second imaging unit.
- substrates In the three-dimensional integration technology in which semiconductor devices are stacked three-dimensionally, two semiconductor substrates (hereinafter referred to as "substrates") are joined. Specifically, for example, the substrates are joined by van der Waals force and hydrogen bond (intermolecular force). Then, in order to properly manufacture a semiconductor device, it is important to properly align the first substrate arranged on the upper side and the second substrate arranged on the lower side when joining and laminating the substrates. become.
- the alignment mark between the first substrate and the second substrate accommodated inside the chamber is imaged by an imaging unit provided outside the chamber. Then, based on the detection result of the imaged alignment mark, the position and orientation of the first holding portion in the horizontal direction are adjusted, and the first substrate and the second substrate are aligned.
- FIG. 1 is a plan view showing an outline of the configuration of the joining system 1.
- FIG. 2 is a side view showing an outline of the internal configuration of the joining system 1.
- the X-axis direction, the Y-axis direction, and the Z-axis direction that are orthogonal to each other are defined, and the Z-axis positive direction is defined as the vertically upward direction.
- the first substrate W1 and the second substrate W2 are joined to form the polymerization substrate T.
- the surface of the first substrate W1 that is joined to the second substrate W2 is referred to as a "joining surface W1a", and the surface opposite to the joining surface W1a is referred to as a "non-bonding surface W1b".
- the surface to be joined to the first substrate W1 is referred to as "joining surface W2a”
- the surface opposite to the joining surface W2a is referred to as "non-bonding surface W2b”.
- the first substrate W1 and the second substrate W2 are semiconductor substrates such as a silicon substrate, respectively.
- two first alignment marks M11 and M12 are formed on the joint surface W1a of the first substrate W1.
- the first alignment marks M11 and M12 are formed on the Y-axis passing through the center of the first substrate W1, for example.
- the first alignment marks M11 and M12 each have a cross shape.
- two second alignment marks M21 and M22 having a cross shape are formed on the Y axis passing through the center of the second substrate W2, for example.
- the shapes of the alignment marks M11, M12, M21, and M22 are not limited to the cross shape, and any shape can be taken.
- a loading / unloading station in which cassettes Cw1, Cw2, and Ct capable of accommodating a plurality of first substrate W1, second substrate W2, and polymerization substrate T are carried in / out from the outside. It has a configuration in which 2 and a processing station 3 provided with various processing devices for performing desired processing on the substrates W1, W2, and the polymerization substrate T are integrally connected.
- the loading / unloading station 2 is provided with a cassette mounting stand 10.
- the cassette mounting table 10 is provided with a plurality of, for example, four cassette mounting plates 11.
- the cassette mounting plates 11 are arranged side by side in a row in the horizontal X direction (vertical direction in FIG. 1). Cassettes Cw1, Cw2, and Ct can be mounted on these cassette mounting plates 11 when the cassettes Cw1, Cw2, and Ct are carried in and out of the joining system 1.
- the carry-in / out station 2 is configured to be able to hold a plurality of first substrates W1, a plurality of second substrates W2, and a plurality of polymerization substrates T.
- the number of cassette mounting plates 11 is not limited to this embodiment and can be set arbitrarily. Further, in addition to the cassettes Cw1, Cw2, and Ct, a cassette or the like for collecting a defective substrate may be mounted on the cassette mounting plate 11.
- the loading / unloading station 2 is provided with a substrate transport area 20 adjacent to the cassette mounting table 10 on the X-axis positive direction side of the cassette mounting table 10.
- the substrate transfer region 20 is provided with a substrate transfer device 22 that is movable on a transfer path 21 extending in the Y-axis direction.
- the substrate transfer device 22 is movable in the vertical direction and around the vertical axis ( ⁇ direction), and the cassettes Cw1, Cw2, and Ct on each cassette mounting plate 11 and the third processing block of the processing station 3 described later.
- the first substrate W1, the second substrate W2, and the polymerization substrate T can be conveyed between the transition devices 60 and 61 of the G3.
- the processing station 3 is provided with a plurality of, for example, three processing blocks G1, G2, and G3 equipped with various devices.
- the first processing block G1 is provided on the front side of the processing station 3 (the negative direction side of the Y axis in FIG. 1), and the first processing block G1 is provided on the back side of the processing station 3 (the positive side of the Y axis in FIG.
- the processing block G2 of 2 is provided.
- a third processing block G3 is provided on the loading / unloading station 2 side (X-axis negative direction side in FIG. 1) of the processing station 3.
- a joining device 30 for joining the substrates W1 and W2 is arranged in the first processing block G1.
- the configuration of the joining device 30 will be described later.
- the second processing block G2 has, for example, a two-layer structure.
- the reformer 40, the transport chamber 41, and the load lock chamber 42 are arranged side by side in this order from the loading / unloading station 2 side in the horizontal X-axis direction.
- the reformer 40 reforms the joint surfaces W1a and W2a of the substrates W1 and W2.
- oxygen gas or nitrogen gas which is a processing gas
- the oxygen ions or nitrogen ions are irradiated on the joint surfaces W1a and W2a, and the joint surfaces W1a and W2a are plasma-treated and modified.
- the load lock chamber 42 is arranged adjacent to the substrate transport region 70 described later on the Y-axis positive direction side via a gate valve (not shown).
- the load lock chamber 42 is configured so that its internal space can be switched between an atmospheric pressure state and a vacuum state. Further, inside the load lock chamber 42, a delivery portion (not shown) for delivering the first substrate W1 and the second substrate W2 is provided.
- the transport chamber 41 is arranged adjacent to the load lock chamber 42 on the negative side of the Y-axis via a gate valve (not shown).
- a substrate transport device (not shown) for transporting the first substrate W1 and the second substrate W2 is arranged.
- the substrate transfer device can transfer the first substrate W1 and the second substrate W2 between the load lock chamber 42 and the reformer 40.
- the hydrophilic devices 50 and 51 are arranged side by side in the horizontal X-axis direction in this order from the loading / unloading station 2 side.
- the hydrophilizing devices 50 and 51 hydrophilize the bonding surfaces W1a and W2a of the substrates W1 and W2 with pure water, and clean the bonding surfaces W1a and W2a.
- pure water is supplied onto the substrates W1 and W2 while rotating the substrates W1 and W2 held by, for example, a spin chuck (not shown). Then, the supplied pure water diffuses on the bonding surfaces W1a and W2a of the substrates W1 and W2, and the bonding surfaces W1a and W2a are hydrophilized.
- the third processing block G3 is provided with transition devices 60 and 61 for the first substrate W1, the second substrate W2, and the polymerization substrate T in two stages in order from the bottom.
- a substrate transport region 70 is formed in a region surrounded by the first processing block G1 to the third processing block G3.
- a substrate transfer device 71 is arranged in the substrate transfer area 70.
- the substrate transfer device 71 has, for example, a transfer arm that can move in the vertical direction, the horizontal direction (X-axis direction, Y-axis direction), and around the vertical axis.
- the substrate transfer device 71 moves in the substrate transfer area 70, and the first substrate W1 and the second are attached to desired devices in the surrounding first processing block G1, second processing block G2, and third processing block G3.
- the substrate W2 and the polymerization substrate T can be conveyed.
- the above joining system 1 is provided with a control device 80 as a control unit.
- the control device 80 is, for example, a computer and has a program storage unit (not shown).
- the program storage unit stores a program that controls substrate processing in the joining system 1. Further, the program storage unit also stores a program for controlling the operation of the drive system of the above-mentioned various processing devices and transfer devices to realize the substrate processing described later in the joining system 1.
- the program may be recorded on a computer-readable storage medium H and may be installed on the control device 80 from the storage medium H.
- FIG. 5 and 6 are side views showing an outline of the configuration of the joining device 30.
- FIG. 7 is a plan view showing an outline of the configuration of the joining device 30.
- the joining device 30 has a configuration in which various members are mounted on the base 100. Specifically, the joining device 30 has a processing container 110, a first holding portion 120, and a second holding portion 130. Further, the joining device 30 has a chamber elevating mechanism 140 and a decompression unit 150 around the processing container 110. Further, the joining device 30 has a support portion 160, a horizontal position adjusting portion 170, a vertical position adjusting portion 180, and a pressurizing portion 190 around the first holding portion 120. Further, the joining device 30 has fixed imaging units 200 and 201 around the second holding unit 130. Further, the joining device 30 has imaging units 210 and 211 that move between the inside and the outside of the processing container 110. Hereinafter, each configuration will be described.
- the processing container 110 is a container whose inside can be sealed, and houses the first holding portion 120 and the second holding portion 130.
- the processing container 110 is divided into two, and has a first chamber 111 on the first holding portion 120 side (upper side) and a second chamber 112 on the second holding portion 130 side (lower side).
- a sealing material 113 for maintaining the airtightness inside the processing container 110 is provided on the joint surface of the second chamber 112 with the first chamber 111.
- the sealing material 113 for example, an O-ring is used. Then, by bringing the first chamber 111 and the second chamber 112 into contact with each other, a closed space is formed inside the processing container 110.
- the first chamber 111 is supported by a support plate 114 provided on the upper surface of the first chamber 111. Further, the support plate 114 is supported by the chamber elevating mechanism 140.
- the chamber elevating mechanism 140 has a support column 141 and an elevating member 142.
- the columns 141 and the elevating members 142 are provided at, for example, four locations on the outer circumference of the support plate 114, respectively.
- the support column 141 is provided so as to extend vertically upward from the base 100.
- the elevating member 142 supports the outer circumference of the support plate 114, and the base end portion of the elevating member 142 is attached to the support column 141.
- the elevating member 142 moves up and down along the support column 141 by a drive unit (not shown) provided with, for example, a motor.
- the first chamber 111 is configured to be able to move up and down by the chamber raising and lowering mechanism 140 having such a structure.
- the tips of the four elevating members 142 are supported by the top plate 143.
- chamber elevating mechanisms 140 are provided on the outer periphery of the support plate 114, but the number of chamber elevating mechanisms 140 is not limited to this.
- the chamber elevating mechanism 140 may be provided at two places, and a stretchable shaft may be provided at the other two places.
- the second chamber 112 is supported by a support base 115 provided on the base 100. That is, the second chamber 112 does not move and is fixed.
- the support base 115 is hollow.
- the second chamber 112 is provided with a decompression unit 150 for depressurizing the inside of the processing container 110.
- the decompression unit 150 has an intake pipe 151 for sucking the atmosphere inside the processing container 110, and an intake device 152 such as a vacuum pump connected to the intake pipe 151.
- FIG. 8 is a cross-sectional view of the configuration of the first holding portion 120 and its surroundings.
- FIG. 9 is a plan view of the first holding portion 120 and its periphery as viewed from below.
- FIG. 10 is a plan view of the first holding portion 120 and its periphery as viewed from above.
- the first holding unit 120 is a holding unit that holds the first substrate W1.
- the first holding portion 120 has an electrostatic chuck 121 and a cooling plate 122.
- the electrostatic chuck 121 has an internal electrode and a dielectric, and uses the electrostatic force generated by applying a voltage to the internal electrode to attract the first substrate W1 to the suction surface.
- the cooling plate 122 is, for example, a water cooling plate, and cooling water flows through the inside. The cooling plate 122 adjusts the first substrate W1 held by the electrostatic chuck 121 to a desired temperature, for example, room temperature.
- first chuck marks N11 and N12 as first holding marks are formed on the lower surface side of the first holding portion 120.
- the first chuck marks N11 and N12 are formed on the Y-axis passing through the center of the electrostatic chuck 121, for example, on the outer peripheral portion of the lower surface of the electrostatic chuck 121. Further, the first chuck marks N11 and N12 each have a cross shape. The shapes of the first chuck marks N11 and N12 are not limited to the cross shape, and any shape can be taken.
- a suction pad 123 that sucks and holds the first substrate W1 is provided.
- the suction pads 123 are provided at, for example, three places.
- the suction pad 123 communicates with the suction mechanism 126 that sucks the first substrate W1 via a suction pipe 125 that inserts a through hole 124 formed through the electrostatic chuck 121 and the cooling plate 122. Further, the suction pad 123 and the suction pipe 125 are configured to be vertically movable by the suction mechanism 126.
- the first holding portion 120 is supported by the supporting portion 160 in a state of being suspended from above.
- the support portion 160 arranges the first holding portion 120 with a gap between it and the first chamber 111.
- the support portion 160 has a movable plate 161 and a transmission shaft 162.
- the movable plate 161 is provided outside the processing container 110 and above the support plate 114.
- the central portion of the movable plate 161 is open, and the movable plate 161 has an annular shape.
- the transmission shafts 162 are arranged on the lower surface of the movable plate 161 on a concentric circle with the movable plate 161 at substantially uniform intervals, for example, at three locations.
- Each transmission shaft 162 extends vertically downward from the movable plate 161, penetrates the support plate 114 and the first chamber 111, and is connected to the upper surface of the cooling plate 122 of the first holding portion 120.
- a bellows 163 that covers the transmission shaft 162 is provided on the outer peripheral portion of the transmission shaft 162.
- the upper end of the bellows 163 is connected to the lower surface of the movable plate 161 and the lower end of the bellows 163 is connected to the upper surface of the support plate 114.
- the first holding portion 120 provided inside the processing container 110 can be moved from the outside of the processing container 110 while ensuring the airtightness of the processing container 110.
- a through hole 164 is formed in the support plate 114 and the first chamber 111, and the transmission shaft 162 inserts the inside of the through hole 164. Since the transmission shaft 162 is moved in the horizontal direction by the horizontal position adjusting portion 170 as described later, the inner diameter of the through hole 164 is sufficiently larger than the outer diameter of the transmission shaft 162.
- a horizontal position adjusting portion 170 is provided between the lower surface of the movable plate 161 and the upper surface of the support plate 114. That is, the horizontal position adjusting unit 170 is provided outside the processing container 110.
- the horizontal position adjusting portions 170 are arranged on a concentric circle with the movable plate 161 at substantially uniform intervals, for example, at three locations.
- the horizontal position adjusting unit 170 for example, a UVW stage having a U-axis, a V-axis, and a W-axis as drive axes is used.
- the horizontal position adjusting unit 170 can move the movable plate 161 in the X-axis direction, the Y-axis direction, and the ⁇ -axis direction. Then, the horizontal movement of the movable plate 161 is transmitted to the first holding portion 120 via the transmission shaft 162, and the horizontal position of the first holding portion 120 is adjusted.
- the horizontal position is a position in the X-axis direction, the Y-axis direction, and the ⁇ -axis direction as described above, that is, a position and an orientation in the horizontal direction.
- a known stage is used for the UVW stage of the horizontal position adjusting unit 170.
- the configuration of the horizontal position adjusting unit 170 is not limited to this, and for example, an XY ⁇ stage having the X-axis, the Y-axis, and the ⁇ -axis as drive axes may be used, or XY ⁇ is driven in one plane, X1. , X2, Y1, Y2, and a 4-axis stage having four drive axes may be used.
- a vertical position adjusting portion 180 is provided on the upper surface of the movable plate 161. That is, the vertical position adjusting unit 180 is provided outside the processing container 110.
- the vertical position adjusting portions 180 are arranged on a concentric circle with the movable plate 161 at substantially uniform intervals, for example, at three locations.
- the vertical position adjusting unit 180 is provided with a drive unit (not shown) equipped with, for example, a motor.
- the vertical position adjusting unit 180 is connected to the transmission shaft 162 and raises and lowers the transmission shaft 162. Then, the elevating and lowering of the transmission shaft 162 is transmitted to the first holding portion 120, and the vertical position of the first holding portion 120 is adjusted. Further, the tilt (horizontal level) of the first holding portion 120 is adjusted by raising and lowering the first holding portion 120 by the three vertical position adjusting portions 180.
- a pressurizing portion 190 is inserted and provided in the central opening of the movable plate 161. That is, the pressurizing unit 190 is provided outside the processing container 110.
- the pressurizing unit 190 has a pressing mechanism 191 and a measuring mechanism 192, and a press rod 193.
- the pressing mechanism 191 and the measuring mechanism 192 and the press rod 193 are provided in this order from above.
- a hydraulic cylinder is used for the pressing mechanism 191.
- the configuration of the pressing mechanism 191 is not limited to the hydraulic cylinder, and for example, an air cylinder (pneumatic cylinder) may be used.
- the pressing mechanism 191 is supported by a support plate 194 provided on the upper surface of the pressing mechanism 191. Further, the support plate 194 is supported by a plurality of, for example, three support columns 195 provided on the lower surface of the support plate 194. The upper end of the support column 195 is connected to the lower surface of the support plate 194, and the lower end of the support column 195 is connected to the upper surface of the support plate 114.
- the support plate 194 has a substantially triangular shape in a plan view. The three support columns 195 are provided at each apex portion of the support plate 194.
- a load cell is used for the measuring mechanism 192.
- the measuring mechanism 192 is provided between the pressing mechanism 191 and the flange 196 provided at the upper end of the press rod 193. Then, the measuring mechanism 192 measures the load applied to the first substrate W1 and the second substrate W2 when the first substrate W1 and the second substrate W2 are pressed by the pressing mechanism 191. The measurement result of the measurement mechanism 192 is output to the control device 80.
- the press rod 193 extends vertically downward from the flange 196, penetrates the support plate 114 and the first chamber 111, and is connected to the central portion of the upper surface of the cooling plate 122 of the first holding portion 120.
- a through hole 197 is formed in the support plate 114 and the first chamber 111, and the press rod 193 inserts the inside of the through hole 197.
- a bellows 198 covering the press rod 193 is provided on the outer peripheral portion of the press rod 193.
- the upper end of the bellows 198 is connected to the lower surface of the flange 196, and the lower end of the bellows 198 is connected to the upper surface of the support plate 114. With the bellows 198, the first holding portion 120 provided inside the processing container 110 can be pressed from the outside of the processing container 110 while ensuring the airtightness of the processing container 110.
- the pressurizing unit 190 is configured as described above, and the press rod 193 is moved in the vertical direction by using the pressing mechanism 191.
- the first holding portion 120 approaches the second holding portion 130 and presses the first substrate W1 held by the first holding portion 120 against the second substrate W2 held by the second holding portion 130. ..
- the measurement mechanism 192 is used to measure the load applied to the first substrate W1 and the second substrate W2.
- FIG. 11 and 12 are cross-sectional views of the configuration of the second holding portion 130 and its surroundings.
- FIG. 13 is a plan view of the second holding portion 130 and its periphery as viewed from above.
- the second holding unit 130 is a holding unit that holds the second substrate W2.
- the second holding portion 130 is arranged so as to face the first holding portion 120 in the vertical direction, and is placed on the central portion of the second chamber 112.
- the intake pipe 151 of the decompression unit 150 described above is connected to the second chamber 112 outside the second holding unit 130 in a plan view.
- the second holding portion 130 has an electrostatic chuck 131 and a cooling plate 132.
- the electrostatic chuck 131 has an internal electrode and a dielectric, and uses the electrostatic force generated by applying a voltage to the internal electrode to attract the second substrate W2 to the suction surface.
- the cooling plate 132 is, for example, a water cooling plate, and cooling water flows through the inside. The cooling plate 132 adjusts the second substrate W2 held by the electrostatic chuck 131 to a desired temperature, for example, room temperature.
- the electrostatic chuck 131 and the cooling plate 132 have the same configuration as the electrostatic chuck 121 and the cooling plate 122 of the first holding portion 120.
- Two second chuck marks N21 and N22 as second holding marks are formed on the upper surface side of the second holding portion 130.
- the second chuck marks N21 and N22 are formed on the Y-axis passing through the center of the electrostatic chuck 131, for example, on the outer peripheral portion of the upper surface of the electrostatic chuck 131. Further, the second chuck marks N21 and N22 each have a cross shape.
- the second chuck marks N21 and N22 are arranged so as to face the first chuck marks N11 and N12 formed on the first holding portion 120, respectively. Further, the shapes of the second chuck marks N21 and N22 are not limited to the cross shape, and any shape can be taken.
- the second holding portion 130 is provided with, for example, three elevating pins 133 for supporting and elevating the second substrate W2 (or the polymerization substrate T) from below.
- the elevating pin 133 inserts a through hole 134 formed through the electrostatic chuck 131, the cooling plate 132, and the second chamber 112.
- the elevating pin 133 is configured to be elevated by an elevating mechanism 135 provided inside the support base 115.
- two fixed imaging units 200 and 201 are provided below the second holding unit 130 and the second chamber 112, for example. Cameras are used for the fixed imaging units 200 and 201, respectively.
- the first fixed imaging unit 200 is arranged at a position facing the first chuck mark N11 and the second chuck mark N21. Further, between the first fixed imaging unit 200 and the second chuck mark N21, a first viewport 202 is formed in the electrostatic chuck 131, the cooling plate 132, and the second chamber 112.
- the first viewport 202 is made of, for example, quartz glass. With the first viewport 202, the airtightness of the processing container 110 can be maintained without interfering with the imaging by the first fixed imaging unit 200.
- the first fixed imaging unit 200 can image the second chuck mark N21 and the first chuck mark N11 via the first viewport 202.
- the first chuck mark N11 is imaged through the second chuck mark N21.
- the captured image of the first fixed imaging unit 200 is output to the control device 80.
- the second fixed imaging unit 201 and its surroundings also have the same configuration as the first fixed imaging unit 200. That is, the second fixed imaging unit 201 is arranged at a position facing the first chuck mark N12 and the second chuck mark N22, and the second viewport 203 is formed on the electrostatic chuck 131, the cooling plate 132, and the second chamber 112. Has been done. Then, the second fixed imaging unit 201 can image the second chuck mark N22 and the first chuck mark N12 via the second viewport 203. The captured image of the second fixed imaging unit 201 is output to the control device 80.
- the displacement meter 204 is provided in the second chamber 112.
- a laser displacement meter is used for the displacement meter 204.
- Displacement meters 204 are provided at a plurality of locations, for example, three locations on the outer peripheral portion of the lower surface of the second holding portion 130.
- a viewport 205 is formed at a position corresponding to the displacement meter 204.
- the viewport 205 is made of, for example, quartz glass. The viewport 205 can maintain the airtightness of the processing container 110 without obstructing the optical path of the laser beam of the displacement meter 204.
- the displacement meter 204 can irradiate the lower surface of the electrostatic chuck 121 of the first holding portion 120 with laser light via the viewport 205, and further receives the reflected light from the electrostatic chuck 121. be able to. Then, the displacement meter 204 can measure the distance between the first holding portion 120 and the second holding portion 130. Further, by using the three displacement meters 204, the inclination of the first holding portion 120 can also be measured. The measurement result of the displacement meter 204 is output to the control device 80.
- the displacement meter 204 is not arranged inside the processing container 110 and does not need to be vacuum compatible. Therefore, for the displacement meter 204, an inexpensive displacement meter that can be used in an atmospheric environment can be used.
- the configurations of the imaging units 210, 211 and their surroundings will be described. As shown in FIGS. 5 to 7, the two imaging units 210 and 211 are configured to move between the inside and the outside of the processing container 110.
- FIG. 14 is a plan view showing an outline of the configuration of the first imaging unit 210.
- FIG. 15 is a side view showing an outline of the configuration of the first imaging unit 210.
- FIG. 16 is an explanatory diagram schematically showing the internal configuration of the first imaging unit 210.
- the solid line arrow indicates the imaging path from the camera (first imaging path Q1, second imaging path Q2), and the dotted arrow indicates the optical path from the light source (first optical path R1, second optical path R2). ..
- the first imaging unit 210 has a first imaging unit 220, a second imaging unit 230, and a common lens unit 240.
- the first imaging unit 220 includes a first camera 221, a first light source 222, a first lens 223, and a first path changing unit 224.
- Reflective mirrors 222a and 223a for changing the first optical path R1 from the first light source 222 are provided inside the first light source 222 and the first lens 223, respectively.
- a reflection mirror 224a for changing the first imaging path Q1 and the first optical path R1 of the first camera 221 is provided inside the first path changing unit 224.
- the second imaging unit 230 also has the same configuration as the first imaging unit 220. That is, the second imaging unit 230 has a second camera 231, a second light source 232, a second lens 233, and a second path changing unit 234.
- the common lens unit 240 has an upper lens 241 and a lower lens 242, and a reflection mirror 243.
- the reflective Mira 243 is provided at an angle of 45 degrees in a side view.
- the first imaging path Q1 and the first optical path R1 from the first imaging unit 220 are respectively redirected vertically upward and directed vertically upward from the upper lens 241.
- the second imaging path Q2 and the second optical path R2 from the second imaging unit 230 are respectively changed in direction vertically downward, and are directed vertically downward from the lower lens 242.
- the first imaging path Q1 (first optical path R1) and the second imaging path Q2 (second optical path R2) extend coaxially in the vertical direction.
- the first imaging unit 210 has the above configuration, and as will be described later, the first imaging unit 220 captures the first alignment mark M11 and the second imaging unit 230 simultaneously images the second alignment mark M21. .. In addition, the first imaging unit 210 simultaneously performs imaging of the first chuck mark N11 by the first imaging unit 220 and imaging of the second chuck mark N21 by the second imaging unit 230. The captured image of the first imaging unit 210 is output to the control device 80.
- FIG. 17 is an explanatory diagram schematically showing the internal configuration of the conventional imaging unit 500.
- the first imaging unit 510 for imaging the upper vertical and the second imaging unit 520 for imaging the lower vertical are provided side by side in the vertical direction. It was.
- the first camera 511 of the first imaging unit 510 includes a focus axis, and the first lens 512 is provided above the first path changing unit 513.
- the second camera 521 of the second imaging unit 520 includes a focus axis, and a second lens 522 is provided below the second path changing unit 523.
- the vertical distance L2 between the first substrate W1 and the second substrate W2 is, for example, 220 mm, which is very long.
- the first imaging unit 210 of the present embodiment has the common lens portion 240, the vertical distance L1 between the first substrate W1 and the second substrate W2 is set as shown in FIG. For example, it can be shortened to 110 mm.
- the imaging by the first imaging unit 210 is performed with the processing container 110 opened, and the distance between the first chamber 111 and the second chamber 112 separated at this time can be reduced.
- the moving distance when the first chamber 111 descends can be reduced.
- the processing time can be shortened.
- the first imaging unit 220, the second imaging unit 230, and the common lens unit 240 are supported on the support plate 250, and a part of the first imaging unit 220 and a part of the second imaging unit 230 are covered. It is covered with 251.
- the second imaging unit 211 also has the same configuration as the first imaging unit 210, that is, includes a first imaging unit 220, a second imaging unit 230, and a common lens unit 240.
- the first imaging unit 210 is further provided with displacement meters 252 and 253.
- a laser displacement meter is used for the displacement meters 252 and 253, respectively, for the displacement meters 252 and 253, respectively.
- the upper displacement meter 252 measures the thickness of the upper surface, for example, the first substrate W1
- the lower displacement meter 253 measures the thickness of the lower surface, for example, the second substrate W2.
- the joining device 30 has a first moving mechanism 260, a second moving mechanism 270, and a third moving mechanism 280 for moving the imaging units 210 and 211. ..
- the first moving mechanism 260 moves the two imaging units 210 and 211 along the X-axis direction (first direction) in the plane region between the first holding portion 120 and the second holding portion 130.
- the first moving mechanism 260 has a gate-shaped moving frame 261 that supports two imaging units 210 and 211 and extends in the Y-axis direction in a plan view. Further, a pair of rails 262 and 262 extending from the negative direction side of the X-axis to the positive direction side of the processing container 110 are provided on the base 100.
- the moving frame 261 is attached to the pair of rails 262 and 262. Further, the moving frame 261 is provided with a drive unit (not shown) provided with, for example, a motor, and the moving frame 261 is configured to be movable along a rail 262 extending along the X axis.
- the second moving mechanism 270 moves the first imaging unit 210 along the Y-axis direction (second direction).
- the second moving mechanism 270 supports the first imaging unit 210 and is attached to the upper surface of the moving frame 261.
- the second moving mechanism 270 has a built-in drive unit including, for example, a motor, and is configured to be movable along the moving frame 261.
- the third moving mechanism 280 moves the second imaging unit 211 along the Y-axis direction (second direction).
- the third moving mechanism 280 supports the second imaging unit 211 and is attached to the upper surface of the moving frame 261.
- the third moving mechanism 280 has a built-in drive unit including, for example, a motor, and is configured to be movable along the moving frame 261.
- a reference mark portion 290 is provided on the X-axis negative direction side of the processing container 110.
- FIG. 18 is a side view showing an outline of the configuration of the reference mark portion 290.
- the reference mark portion 290 has a first reference mark support 291 and a second reference mark support 292.
- the first reference mark support 291 is provided on the base 100 and has a gate-shaped frame structure extending in the Y-axis direction.
- the first reference mark support 291 is formed larger than the moving frame 261 so that the moving frame 261 passes inside the first reference mark support 291.
- first reference marks S11, S12, and S13 are formed on the lower surface of the first reference mark support 291.
- the image pickup units 210 and 211 supported by the moving frame 261 pass through the first reference mark support body 291 and the first image pickup unit 220 of each image pickup unit 210 and 211 passes through the first reference mark supports S11, S12 and S13, respectively. Any one of them is to be imaged.
- the captured image of the first imaging unit 220 is output to the control device 80.
- three first reference marks S11, S12, and S13 are provided, but in order for the first imaging unit 220 of each imaging unit 210, 211 to take an image, there are two first reference marks. All you need is the above.
- the second reference mark support 292 is provided so as to extend vertically upward on the base 100. Three second reference mark supports 292 are provided below each of the first reference marks S11, S12, and S13. The second reference mark support 292 is provided inside the moving frame 261 so that the moving frame 261 passes above the first reference mark support 291.
- the second reference marks S21, S22, and S23 are formed on the upper surfaces of each of the three second reference mark supports 292. That is, the second reference marks S21, S22, and S23 are arranged so as to face the first reference marks S11, S12, and S13, respectively. Then, when the image pickup units 210 and 211 supported by the moving frame 261 pass through the second reference mark support body 292, the second image pickup unit 230 of each image pickup unit 210 and 211 is subjected to the second reference mark S21 and S22, respectively. , S23, any one of them is to be imaged. The captured image of the second imaging unit 230 is output to the control device 80.
- the first reference marks S11, S12, and S13 by the first imaging unit 220 and the second reference marks S21, S22, and S23 by the second imaging unit 230 are simultaneously performed. Further, as will be described later, the postures (orientations) of the imaging units 210 and 211 are adjusted based on the captured image of the reference mark.
- FIG. 19 is a flow chart showing a main process of the wafer bonding process.
- a cassette Cw1 containing a plurality of first substrates W1, a cassette Cw2 accommodating a plurality of second substrates W2, and an empty cassette Ct are placed on a desired cassette mounting plate 11 of the loading / unloading station 2. Will be done.
- the first substrate W1 in the cassette Cw1 is taken out by the substrate transfer device 22, and is transferred to the transition device 60 of the third processing block G3 of the processing station 3.
- the first substrate W1 is conveyed to the load lock chamber 42 of the second processing block G2 by the substrate transfer device 71. After that, the inside of the load lock chamber 42 is sealed and the pressure is reduced. Subsequently, the first substrate W1 is conveyed to the reformer 40 by the substrate transfer device in the transfer chamber 41.
- oxygen gas or nitrogen gas which is a processing gas, is excited to be turned into plasma and ionized under a desired reduced pressure atmosphere.
- the oxygen ion or nitrogen ion is irradiated to the joint surface W1a of the first substrate W1, and the joint surface W1a is subjected to plasma treatment. Then, the joint surface W1a of the first substrate W1 is modified (step A1 in FIG. 19).
- the first substrate W1 is transported to the load lock chamber 42 by the substrate transport device in the transport chamber 41. After that, the inside of the load lock chamber 42 is sealed and opened to the atmosphere. Subsequently, the first substrate W1 is transported to the hydrophilization device 50 by the substrate transport device 71.
- the hydrophilization device 50 pure water is supplied onto the first substrate W1 while rotating the first substrate W1 held by the spin chuck. Then, the supplied pure water diffuses on the bonding surface W1a of the first substrate W1, and a hydroxyl group (silanol group) adheres to the bonding surface W1a of the first substrate W1 modified by the reforming apparatus 40 to form the bonding.
- the surface W1a is hydrophilized. Further, the joint surface W1a of the first substrate W1 is washed with the pure water (step A2 in FIG. 19).
- the orientation of the first substrate W1 in the horizontal direction is adjusted by adjusting the position of the orientation flat or the notch. Further, the front and back sides of the first substrate W1 are reversed, and the joint surface W1a of the first substrate W1 is directed downward.
- the horizontal orientation adjustment and front / back inversion of the first substrate W1 are performed by an apparatus (not shown) provided in the joining system 1.
- the first substrate W1 is conveyed to the joining device 30 of the first processing block G1 by the substrate conveying device 71.
- the first chamber 111 and the second chamber 112 are separated from each other, and the processing container 110 is opened.
- the first substrate W1 is delivered to the suction pad 123, which stands by in advance below the electrostatic chuck 121 of the first holding portion 120, with the joint surface W1a facing downward.
- the suction pad 123 is raised, and as shown in FIG. 20, the first substrate W1 is sucked and held by the electrostatic chuck 121 (step A3 in FIG. 19).
- steps A1 to A3 described above While the processing of steps A1 to A3 described above is being performed on the first substrate W1, the processing of the second substrate W2 is performed following the first substrate W1. First, the second substrate W2 in the cassette Cw2 is taken out by the substrate transfer device 22, and is transferred to the transition device 60 of the processing station 3.
- the second substrate W2 is conveyed to the load lock chamber 42 by the substrate transfer device 71, and further transferred to the reformer 40 by the substrate transfer device of the transfer chamber 41.
- the joint surface W2a of the second substrate W2 is reformed (step A4 in FIG. 19).
- the modification of the joint surface W2a of the second substrate W2 in step A4 is the same as in step A1 described above.
- the second substrate W2 is conveyed to the load lock chamber 42 by the substrate transfer device of the transfer chamber 41, and further transferred to the hydrophilization device 50 by the substrate transfer device 71.
- the joint surface W2a of the second substrate W2 is hydrophilized and the joint surface W2a is washed (step A5 in FIG. 19).
- the hydrophilization and cleaning of the joint surface W2a of the second substrate W2 in step A5 is the same as in step A2 described above.
- the orientation of the first substrate W1 in the horizontal direction is adjusted by adjusting the position of the orientation flat or the notch of the second substrate W2.
- the horizontal orientation adjustment and front / back inversion of the second substrate W2 are performed by an apparatus (not shown) provided in the joining system 1.
- the second substrate W2 is conveyed to the joining device 30 by the substrate transfer device 71.
- the second substrate W2 carried into the joining device 30 is delivered to the elevating pin 133 which is waiting above the electrostatic chuck 131 of the second holding portion 130 in advance with the joining surface W2a facing upward. ..
- the elevating pin 133 is lowered, and as shown in FIG. 20, the second substrate W2 is attracted and held by the electrostatic chuck 131 (step A6 in FIG. 19).
- the postures (orientations) of the first imaging unit 210 and the second imaging unit 211 are adjusted (step A7 in FIG. 19).
- step A7 the imaging units 210 and 211 waiting outside the processing container 110 are moved to the position of the reference mark portion 290 in the positive direction of the X axis by the first moving mechanism 260.
- the first imaging unit 220 of the first imaging unit 210 images the first reference mark S11
- the second imaging unit 230 images the second reference mark S21.
- the captured image of the first imaging unit 210 is output to the control device 80.
- the control device 80 detects the first reference mark S11 and the second reference mark S21, respectively, by performing edge detection on the acquired image data.
- the adjustment mechanism (not shown) of the first imaging unit 210 is controlled so that the first reference mark S11 and the second reference mark S21 match.
- the posture (orientation) of the first imaging unit 210 is adjusted by the adjustment mechanism.
- step A7 the posture (orientation) of the second imaging unit 211 is adjusted by the same method as the above adjusting method for the first imaging unit 210.
- the postures of the imaging units 210 and 211 can be improved.
- the adjustment accuracy (alignment accuracy) of the horizontal positions of the substrates W1 and W2 in step A9, which will be described later, can be improved.
- the thicknesses of the first substrate W1 and the second substrate W2 are measured (step A8 in FIG. 19).
- step A8 as shown in FIG. 21, the imaging units 210 and 211 are further moved to the positive direction side of the X-axis and arranged inside the processing container 110.
- the thickness of the first substrate W1 is moved by using the displacement meters 252 and 253 while moving the first imaging unit 210 from one end to the other end of the substrates W1 and W2 in the X-axis direction.
- the thickness of the second substrate W2 are measured.
- the measurement results of the displacement meters 252 and 253 are output to the control device 80.
- the thickness of the first substrate W1 and the thickness of the second substrate W2 are determined by the gap between the substrates W1 and W2 when the first substrate W1 and the second substrate W2 are joined in step A13 described later. Used when managing.
- step A8 the horizontality (vertical position) of the first holding portion 120 may be adjusted.
- the control device 80 measures the horizontality of the first holding unit 120 based on the measurement results of the displacement meters 252 and 253. Then, the three vertical position adjusting portions 180 are controlled so that the suction surface of the electrostatic chuck 121 of the first holding portion 120 becomes horizontal. By driving these three vertical position adjusting portions 180 individually, the three transmission shafts can be raised and lowered individually, and the horizontality of the first holding portion 120 can be adjusted.
- the horizontal position of the first holding portion 120 is adjusted, and the horizontal positions of the first substrate W1 and the second substrate W2 are adjusted (step A9 in FIG. 19).
- step A9 as shown in FIGS. 22 and 23, the imaging units 210 and 211 are moved in the X-axis direction by the first moving mechanism 260, and the common lens portion 240 of the imaging units 210 and 211 is moved to the X of the substrates W1 and W2. Place it at the center position in the axial direction.
- the first image pickup unit 210 is moved in the positive direction of the Y axis by the second movement mechanism 270, and the common lens unit 240 is arranged at a position facing the first alignment mark M11 and the second alignment mark M21. Then, at the same time that the first imaging unit 220 images the first alignment mark M11, the second imaging unit 230 images the second alignment mark M21. The captured image of the first imaging unit 210 is output to the control device 80. Since the first alignment mark M11 is imaged and the second alignment mark M21 is imaged at the same time in this way, the imaging time can be shortened, and the horizontal position adjustment accuracy (alignment accuracy) described later can be improved. ..
- the second image pickup unit 211 is moved in the negative direction of the Y axis by the third movement mechanism 280, and the common lens unit 240 is arranged at a position facing the first alignment mark M12 and the second alignment mark M22. Then, at the same time that the first imaging unit 220 images the first alignment mark M12, the second imaging unit 230 images the second alignment mark M22. The captured image of the second imaging unit 211 is output to the control device 80.
- the control device 80 detects the alignment marks M11, M21, M12, and M22, respectively, by performing edge detection on the acquired image data. Then, the horizontal position adjustment is made so that the cross shape of the first alignment mark M11 and the cross shape of the second alignment mark M21 are matched, and the cross shape of the first alignment mark M12 and the cross shape of the second alignment mark M22 are matched.
- the unit 170 is controlled. By controlling the horizontal position adjusting unit 170, the horizontal position (position and orientation in the horizontal direction) of the first holding unit 120 is adjusted.
- the horizontal position adjusting unit 170 moves the first holding unit 120 in the horizontal direction or rotates it around the vertical axis. As a result, the horizontal positions of the first substrate W1 and the second substrate W2 are adjusted.
- step A9 the alignment marks M11, M21, M12, and M22 are adjusted by the two imaging units 210 and 211, and the horizontal positions of the first substrate W1 and the second substrate W2 are adjusted.
- the accuracy can be improved.
- the adjustment can be performed in a short time.
- the first chuck marks N11 and N12 and the second chuck marks N21 and N22 are detected (step A10 in FIG. 19).
- step A10 as shown in FIGS. 23 and 24, the first image pickup unit 210 is moved in the positive direction of the Y axis by the second movement mechanism 270, and the common lens portion 240 of the first image pickup unit 210 is moved to the first chuck mark N11. And the second chuck mark N21 are arranged at a position facing each other. Then, at the same time that the first imaging unit 220 images the first chuck mark N11, the second imaging unit 230 images the second chuck mark N21. The captured image of the first imaging unit 210 is output to the control device 80.
- the second imaging unit 211 is moved in the negative direction of the Y-axis by the third moving mechanism 280, and the common lens unit 240 is arranged at a position facing the first chuck mark N12 and the second chuck mark N22. Then, at the same time that the first imaging unit 220 images the first chuck mark N12, the second imaging unit 230 images the second chuck mark N22. The captured image of the second imaging unit 211 is output to the control device 80.
- the coordinates (x, y) of the pair of chuck marks N11 and N21 facing each other are the reference coordinates (0,0).
- the chuck marks N11 and N21 also move, so that the coordinates (x, y) of the chuck marks N11 and N21 become ( ⁇ x1, ⁇ y1). ..
- the coordinates (x, y) of the other pair of opposite chuck marks N12 and N22 are also ( ⁇ x2, ⁇ y2).
- the control device 80 detects the chuck marks N11, N21, N12, and N22, respectively, by performing edge detection on the acquired image data. Then, the coordinates ( ⁇ x1, ⁇ y1) of the chuck marks N11 and N21 described above and the coordinates ( ⁇ x2, ⁇ y2) of the chuck marks N12 and N22 are calculated. In the control device 80, the coordinates ( ⁇ x1, ⁇ y1) and ( ⁇ x2, ⁇ y2) of these chuck marks are used when adjusting the horizontal position of the first holding unit 120 in step A12 described later.
- the alignment marks M11, M21, M12, M22 and the chuck marks N11, N21, N12, N22 are arranged on the same Y-axis, respectively. Therefore, the movement of the imaging units 210 and 211 in step A10 may be only movement in the Y-axis direction. Moreover, the respective distances D between the alignment marks M11, M21, M12, M22 and the chuck marks N11, N21, N12, N22 are as small as 20 mm to 30 mm, for example. In such a case, the posture shift due to the movement of the imaging units 210 and 211 can be suppressed, and the imaging accuracy of the imaging units 210 and 211 can be improved.
- the imaging units 210 and 211 are moved in the negative direction of the X-axis by the first moving mechanism 260, and are ejected to the outside of the processing container 110.
- the first imaging unit 210 moves the first region B1 on the positive direction side of the Y axis to perform imaging
- the second imaging unit 211 is on the negative direction side of the Y axis.
- the second region B2 is moved and imaged.
- processing container 110 is sealed, and the inside of the processing container 110 is depressurized to a desired degree of vacuum (step A11 in FIG. 19).
- step A11 as shown in FIG. 25, the first chamber 111 is lowered by the chamber elevating mechanism 140, and the first chamber 111 and the second chamber 112 are brought into contact with each other. Then, a closed space is formed inside the processing container 110. After that, the intake device 152 of the decompression unit 150 is operated to depressurize the inside of the processing container 110. As a result, the inside of the processing container 110 is maintained at a desired degree of vacuum of, for example, 1 Pa or less.
- the vertical distance L1 between the first substrate W1 and the second substrate W2 is short, so that the moving distance when the first chamber 111 descends is small. it can. Therefore, it is possible to suppress the displacement of the horizontal position of the first holding portion 120 due to the lowering of the first chamber 111. In addition, the time required for step A11 can be shortened.
- step A12 in FIG. 19 the horizontal position of the first holding portion 120 is adjusted (step A12 in FIG. 19).
- step A11 the inside of the processing container 110 is depressurized and pressure fluctuates, so that the impact causes the horizontal position of the first holding portion 120 adjusted in step A9 to deviate slightly. Therefore, the horizontal position of the first holding portion 120 is readjusted.
- step A12 the first fixed imaging unit 200 images the first chuck mark N11 and the second chuck mark N21, and the second fixed imaging unit 201 images the first chuck mark N12 and the second chuck mark N22.
- the captured images of the fixed imaging units 200 and 201 are output to the control device 80.
- the control device 80 detects the chuck marks N11, N21, N12, and N22, respectively, by performing edge detection on the acquired image data. Then, the coordinates ( ⁇ x1, ⁇ y1) of the chuck marks N11 and N21 acquired in step A10 described above and the coordinates ( ⁇ x2, ⁇ y2) of the chuck marks N12 and N22 are restored here. That is, as shown in FIG. 26, the horizontal position adjusting unit 170 is controlled so that the chuck marks N11 and N21 are located at the coordinates ( ⁇ x1, ⁇ y1) and the chuck marks N12 and N22 are located at the coordinates ( ⁇ x2, ⁇ y2). To do. By controlling the horizontal position adjusting unit 170, the horizontal position (position and orientation in the horizontal direction) of the first holding unit 120 is adjusted.
- first substrate W1 and the second substrate W2 are joined (step A13 in FIG. 19).
- step A13 as shown in FIG. 27, the first holding portion 120 is lowered by using the three vertical position adjusting portions 180, and the first substrate W1 and the second substrate W2 are brought into contact with each other.
- the control device 80 controls the distance between the first substrate W1 and the second substrate W2 while considering the thicknesses of the first substrate W1 and the second substrate W2 measured in step A8.
- first substrate W1 and the second substrate W2 are pressed and joined more firmly (step A14 in FIG. 19).
- step A14 the press rod 193 is moved in the vertical direction by using the pressing mechanism 191 of the pressing unit 190.
- the first holding portion 120 approaches the second holding portion 130 and presses the first substrate W1 held by the first holding portion 120 against the second substrate W2 held by the second holding portion 130. ..
- the measurement mechanism 192 is used to measure the load applied to the first substrate W1 and the second substrate W2.
- the pressing load is, for example, 30 kN. Then, when the first substrate W1 and the second substrate W2 are pressed, the first substrate W1 and the second substrate W2 are more firmly bonded to each other to form the polymerization substrate T.
- FIG. 29 is an explanatory diagram showing a load state of a load when pressing the first substrate W1 and the second substrate W2.
- the pressing load P1 by the pressurizing unit 190 is 30 kN.
- 18 kN which is a differential pressure load P2 between the atmospheric pressure outside the processing container 110 and the vacuum pressure inside the processing container 110, is applied to the upper surface of the support plate 114 of the processing container 110.
- the load substantially applied to the processing container 110 is 12 kN obtained by subtracting the differential pressure load P2 from the pressing load P1.
- This 12 kN is borne by the reaction force P3 by the chamber elevating mechanism 140. Therefore, in the present embodiment, the pressing load P1 can be applied without applying a load to the processing container 110.
- the first holding portion 120 is supported by the transmission shaft 162 in a suspended state from above. Further, the first holding portion 120 is pressed from above by the pressurizing portion 190, and the transmission shaft 162 can be separated from the pressing. Here, if the first holding portion 120 is pressed while the first substrate W1 and the second substrate W2 are in contact with each other, the first holding portion 120 may be deformed. When the first holding portion 120 is deformed, stress is applied to the movable plate 161 via the transmission shaft 162. At this point, for example, if the motor of the vertical position adjusting unit 180 is stopped, the transmission shaft 162 and the movable plate 161 become free in the vertical direction.
- high-load joining processing by the pressurizing section 190 and high-precision alignment by the horizontal position adjusting section 170 via the support section 160 can be realized at the same time.
- the processing container 110 is opened to bring the inside of the processing container 110 to atmospheric pressure (step A15 in FIG. 19).
- step A15 as shown in FIG. 30, the first chamber 111 is raised by the chamber elevating mechanism 140 to open the processing container 110. At this time, the adsorption and holding of the first substrate W1 by the electrostatic chuck 121 of the first holding portion 120 is stopped, and the first holding portion 120 is also raised by the vertical position adjusting portion 180. In addition, the pressing by the pressurizing unit 190 is also stopped.
- the adsorption and holding of the second substrate W2 (polymerization substrate T) by the electrostatic chuck 131 of the second holding portion 130 is stopped, and then the polymerization substrate T is raised from the electrostatic chuck 131 by the elevating pin 133. After that, as shown in FIG. 31, the polymerization substrate T is delivered from the elevating pin 133 to the substrate transfer device 71, and is carried out from the joining device 30.
- the polymerization substrate T is conveyed to the transition device 61 by the substrate transfer device 71, and then transferred to the cassette Ct of the desired cassette mounting plate 11 by the substrate transfer device 22 of the loading / unloading station 2. In this way, the joining process of the series of substrates W1 and W2 is completed.
- the horizontal positions of the first substrate W1 and the second substrate W2 can be appropriately adjusted in step A9, so that when the first substrate W1 and the second substrate W2 are joined in step A13.
- the joining accuracy can be improved. It is also possible to improve the throughput of the joining process.
- step A14 after joining the first substrate W1 and the second substrate W2 in step A13, the first substrate W1 and the second substrate W2 are pressed in step A14, but sufficient bonding strength is obtained in step A13. If obtained, step A14 may be omitted. In such a case, the pressurizing unit 190 may be omitted.
- a striker may be provided to lower only the center of the upper surface of the first holding portion 120.
- the center of the first substrate W1 and the center of the second substrate W2 are brought into contact with each other in a state where the first substrate W1 is warped downward in a convex shape. Then, they are sequentially joined from the center of the substrate toward the outer circumference.
- the pressurizing unit 190 presses the first holding unit 120 vertically downward has been described, but the pressing unit 190 may press the second holding unit 130 vertically upward.
- the alignment mechanism including the support portion 160, the horizontal position adjusting portion 170, and the vertical position adjusting portion 180 is provided in the first holding portion 120, but is provided in the second holding portion 130. It may be.
- first holding portion 120 is arranged above and the second holding portion 130 is arranged below has been described, but the arrangement of the first holding portion 120 and the second holding portion 130 is upside down. It may be.
- first holding portion 120 is configured to be movable in the vertical direction, but the second holding portion 130 may be movable in the vertical direction, or the first holding portion 120 and the like. Both of the second holding portions 130 may be movable in the vertical direction.
- the first substrate W1 and the second substrate W2 are joined in a vacuum atmosphere, but this embodiment can also be applied in the case of joining in an atmospheric atmosphere.
- a joining device for joining a first substrate and a second substrate wherein a first holding portion that holds the first substrate and a first holding portion that are arranged to face the first holding portion and hold the second substrate.
- 2 Holding unit first imaging unit that images the first alignment mark formed on the joint surface of the first substrate, and second imaging that images the second alignment mark formed on the joint surface of the second substrate.
- a second moving mechanism that moves the first imaging unit of the two imaging units along a second direction orthogonal to the first direction, and a second imaging unit of the two imaging units.
- the first moving mechanism, the second moving mechanism, and the third moving mechanism are controlled so that the first imaging unit images the first region and the second imaging unit images the second region.
- the joining device according to (1) above which has a control unit.
- the imaging unit changes the first optical axis of the first imaging unit to the first substrate side, and the second optical axis of the second imaging unit is coaxial with the first optical axis.
- the first imaging unit captures the first holding mark formed on the first holding portion, and the second imaging unit captures the second holding mark formed on the second holding portion.
- It has a processing container for accommodating the first holding portion and the second holding portion, and a fixed imaging unit for imaging the first holding mark and the second holding mark from the outside of the processing container.
- the joining device according to (4) above.
- (6) A first reference mark provided at a position separated from the first holding portion and the second holding portion in the first direction in a plan view and imaged by the first imaging unit, and the first reference mark.
- the joining device according to any one of (1) to (5) above, which is provided so as to face each other and has a second reference mark imaged by the second imaging unit.
- a bonding system for joining a first substrate and a second substrate, the processing station including a joining device for joining the first substrate and the second substrate, and the first substrate, the second substrate, or the like.
- the bonding device has a first holding that holds the first substrate, and has a loading / unloading station for loading / unloading the polymerized substrate to which the first substrate and the second substrate are bonded to the processing station.
- a second holding portion that is arranged to face the first holding portion and holds the second substrate, and a first imaging portion that images a first alignment mark formed on a joint surface of the first substrate.
- Two imaging units including a second imaging unit that images a second alignment mark formed on a joint surface of the second substrate, and a plane region between the first holding unit and the second holding unit.
- the first moving mechanism that moves the two imaging units along the first direction and the first imaging unit of the two imaging units are moved along the second direction orthogonal to the first direction.
- a joining system including a second moving mechanism for moving a second image pickup unit, and a third moving mechanism for moving the second image pickup unit out of the two image pickup units along the second direction.
- a joining method for joining a first substrate and a second substrate using a joining device wherein the joining device is The first holding portion that holds the first substrate, the second holding portion that is arranged to face the first holding portion and holds the second substrate, and the first alignment formed on the joint surface of the first substrate.
- Two imaging units including a first imaging unit for imaging a mark and a second imaging unit for imaging a second alignment mark formed on a joint surface of the second substrate, the first holding unit and the said In the plane region between the second holding portion, the first moving mechanism for moving the two imaging units along the first direction and the first imaging unit of the two imaging units are moved in the first direction. It has a second moving mechanism that moves along a second direction orthogonal to the above, and a third moving mechanism that moves the second imaging unit of the two imaging units along the second direction.
- the joining methods include (a) a step of holding the first substrate by the first holding portion, (b) a step of holding the second substrate by the second holding portion, and (c) the first moving mechanism.
- the first imaging unit is moved in the first region, in the step (e), the second imaging unit is moved in the second region, and in the step (f).
- the imaging unit changes the first imaging path of the first imaging unit to the first substrate side, and the second imaging path of the second imaging unit is coaxial with the first imaging path.
- the first alignment mark and the second alignment mark are simultaneously imaged by the image pickup unit in the step (f), wherein the reflection mirror is changed to the second substrate side.
- the first imaging unit is moved in the second direction by the second moving mechanism.
- the second imaging unit was moved in the second direction by the third moving mechanism, and each of the first imaging unit and the second imaging unit was formed in the first holding portion by the first imaging unit.
- the joining method according to any one of (8) to (10) above, wherein the first holding mark is imaged and the second holding mark formed on the second holding portion is imaged by the second imaging unit.
- the joining device is provided at a position along the first direction away from the first imaging unit and the second imaging unit in a plan view, and the first reference mark imaged by the first imaging unit. And a second reference mark provided facing the first reference mark and imaged by the second imaging unit. In the step (c), the first reference mark is provided by the first imaging unit.
- the joining method according to any one of (8) to (11) above, wherein the second reference mark is imaged by the second imaging unit.
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Abstract
Description
先ず、本実施形態にかかる接合システムの構成について説明する。図1は、接合システム1の構成の概略を示す平面図である。図2は、接合システム1の内部構成の概略を示す側面図である。なお、以下においては、位置関係を明確にするために、互いに直交するX軸方向、Y軸方向及びZ軸方向を規定し、Z軸正方向を鉛直上向き方向とする。
次に、上述した接合装置30の構成について説明する。図5及び図6は、接合装置30の構成の概略を示す側面図である。図7は、接合装置30の構成の概略を示す平面図である。
先ず、処理容器110及びその周辺の構成について説明する。
次に、第1保持部120及びその周辺の構成について説明する。図8は、第1保持部120及びその周辺の構成の断面図である。図9は、第1保持部120及びその周辺を下方から見た平面図である。図10は、第1保持部120及びその周辺を上方から見た平面図である。
次に、第2保持部130及びその周辺の構成について説明する。図11及び図12は、第2保持部130及びその周辺の構成の断面図である。図13は、第2保持部130及びその周辺を上方から見た平面図である。
次に、撮像ユニット210、211及びその周辺の構成について説明する。図5~図7に示すように2つの撮像ユニット210、211は、処理容器110の内部と外部の間を移動するように構成されている。
次に、以上のように構成された接合システム1を用いて行われる基板W1、W2の接合処理について説明する。図19は、基板接合処理の主な工程を示すフロー図である。
(1)第1基板と第2基板を接合する接合装置であって、前記第1基板を保持する第1保持部と、前記第1保持部と対向配置され、前記第2基板を保持する第2保持部と、前記第1基板の接合面に形成された第1アライメントマークを撮像する第1撮像部と、前記第2基板の接合面に形成された第2アライメントマークを撮像する第2撮像部とを備えた、2つの撮像ユニットと、前記第1保持部と前記第2保持部との間の平面領域内において、前記2つの撮像ユニットを第1方向に沿って移動させる第1移動機構と、前記2つの撮像ユニットのうち第1撮像ユニットを、前記第1方向と直交する第2方向に沿って移動させる第2移動機構と、前記2つの撮像ユニットのうち第2撮像ユニットを、前記第2方向に沿って移動させる第3移動機構と、を有する、接合装置。
(2)前記第1撮像ユニットが第1領域を撮像し、前記第2撮像ユニットが第2領域を撮像するように、前記第1移動機構、前記第2移動機構及び前記第3移動機構を制御する制御部を有する、前記(1)に記載の接合装置。
(3)前記撮像ユニットは、前記第1撮像部の第1光軸を前記第1基板側に変更するとともに、前記第2撮像部の第2光軸を前記第1光軸と同軸上であって第2基板側に変更する反射ミラを有する、前記(1)又は(2)に記載の接合装置。
(4)前記第1撮像部は、前記第1保持部に形成された第1保持マークを撮像し、前記第2撮像部は、前記第2保持部に形成された第2保持マークを撮像する、前記(1)~(3)のいずれかに記載の接合装置。
(5)前記第1保持部と前記第2保持部とを収容する処理容器と、前記処理容器の外部から前記第1保持マークと前記第2保持マークを撮像ずる固定撮像部と、を有する、前記(4)に記載の接合装置。
(6)平面視において前記第1保持部と前記第2保持部から前記第1方向に離間した位置に設けられ、前記第1撮像部が撮像する第1基準マークと、前記第1基準マークと対向して設けられ、前記第2撮像部が撮像する第2基準マークと、を有する、前記(1)~(5)のいずれかに記載の接合装置。
(7)第1基板と第2基板を接合する接合システムであって、前記第1基板と前記第2基板を接合する接合装置を備えた処理ステーションと、前記第1基板、前記第2基板又は前記第1基板と前記第2基板が接合された重合基板を、前記処理ステーションに対して搬入出する搬入出ステーションと、を有し、前記接合装置は、前記第1基板を保持する第1保持部と、前記第1保持部と対向配置され、前記第2基板を保持する第2保持部と、前記第1基板の接合面に形成された第1アライメントマークを撮像する第1撮像部と、前記第2基板の接合面に形成された第2アライメントマークを撮像する第2撮像部とを備えた、2つの撮像ユニットと、前記第1保持部と前記第2保持部との間の平面領域内において、前記2つの撮像ユニットを第1方向に沿って移動させる第1移動機構と、前記2つの撮像ユニットのうち第1撮像ユニットを、前記第1方向と直交する第2方向に沿って移動させる第2移動機構と、前記2つの撮像ユニットのうち第2撮像ユニットを、前記第2方向に沿って移動させる第3移動機構と、を有する、接合システム。
(8)接合装置を用いて第1基板と第2基板を接合する接合方法であって、前記接合装置は、
前記第1基板を保持する第1保持部と、前記第1保持部と対向配置され、前記第2基板を保持する第2保持部と、前記第1基板の接合面に形成された第1アライメントマークを撮像する第1撮像部と、前記第2基板の接合面に形成された第2アライメントマークを撮像する第2撮像部とを備えた、2つの撮像ユニットと、前記第1保持部と前記第2保持部との間の平面領域内において、前記2つの撮像ユニットを第1方向に沿って移動させる第1移動機構と、前記2つの撮像ユニットのうち第1撮像ユニットを、前記第1方向と直交する第2方向に沿って移動させる第2移動機構と、前記2つの撮像ユニットのうち第2撮像ユニットを、前記第2方向に沿って移動させる第3移動機構と、を有し、前記接合方法は、(a)前記第1保持部によって前記第1基板を保持する工程と、(b)前記第2保持部によって前記第2基板を保持する工程と、(c)前記第1移動機構によって前記第1撮像ユニットと前記第2撮像ユニットを前記第1方向に移動させる工程と、(d)前記第2移動機構によって前記第1撮像ユニットを前記第2方向に移動させる工程と、(e)前記第3移動機構によって前記第2撮像ユニットを前記第2方向に移動させる工程と、(f)前記第1撮像ユニットと前記第2撮像ユニットのそれぞれによって、前記第1アライメントマークと前記第2アライメントマークを撮像する工程と、(g)前記(f)工程で撮像した画像に基づいて、前記第1保持部に保持された前記第1基板と、前記第2保持部に保持された前記第2基板との水平方向位置を調整する工程と、を有する、接合方法。
(9)前記(d)工程では、前記第1撮像ユニットを第1領域において移動させ、前記(e)工程では、前記第2撮像ユニットを第2領域において移動させ、前記(f)工程では、前記第1撮像ユニットによって第1領域を撮像し、前記第2撮像ユニットによって第2領域を撮像する、前記(8)に記載の接合方法。
(10)前記撮像ユニットは、前記第1撮像部の第1撮像経路を前記第1基板側に変更するとともに、前記第2撮像部の第2撮像経路を前記第1撮像経路と同軸上であって第2基板側に変更する反射ミラを有し、前記(f)工程では、前記撮像ユニットによって前記第1アライメントマークと前記第2アライメントマークを同時に撮像する、前記(8)又は(9)に記載の接合方法。
(11)前記(g)工程の後、前記第2移動機構によって前記第1撮像ユニットを前記第2方向に移動させ、
前記第3移動機構によって前記第2撮像ユニットを前記第2方向に移動させ、前記第1撮像ユニットと前記第2撮像ユニットのそれぞれにおいて、前記第1撮像部によって前記第1保持部に形成された第1保持マークを撮像し、前記第2撮像部によって前記第2保持部に形成された第2保持マークを撮像する、前記(8)~(10)のいずれかに記載の接合方法。
(12)前記接合装置は、平面視において前記第1撮像部と前記第2撮像部から離間して前記第1方向に沿った位置に設けられ、前記第1撮像部が撮像する第1基準マークと、前記第1基準マークと対向して設けられ、前記第2撮像部が撮像する第2基準マークと、を有し、前記(c)工程では、前記第1撮像部によって前記第1基準マークを撮像し、前記第2撮像部によって前記第2基準マークを撮像する、前記(8)~(11)のいずれかに記載の接合方法。
120 第1保持部
130 第2保持部
210 第1撮像ユニット
211 第2撮像ユニット
220 第1撮像部
230 第1撮像部
260 第1移動機構
270 第2移動機構
280 第3移動機構
W1 第1基板
W2 第2基板
Claims (12)
- 第1基板と第2基板を接合する接合装置であって、
前記第1基板を保持する第1保持部と、
前記第1保持部と対向配置され、前記第2基板を保持する第2保持部と、
前記第1基板の接合面に形成された第1アライメントマークを撮像する第1撮像部と、前記第2基板の接合面に形成された第2アライメントマークを撮像する第2撮像部とを備えた、2つの撮像ユニットと、
前記第1保持部と前記第2保持部との間の平面領域内において、前記2つの撮像ユニットを第1方向に沿って移動させる第1移動機構と、
前記2つの撮像ユニットのうち第1撮像ユニットを、前記第1方向と直交する第2方向に沿って移動させる第2移動機構と、
前記2つの撮像ユニットのうち第2撮像ユニットを、前記第2方向に沿って移動させる第3移動機構と、を有する、接合装置。 - 前記第1撮像ユニットが第1領域を撮像し、前記第2撮像ユニットが第2領域を撮像するように、前記第1移動機構、前記第2移動機構及び前記第3移動機構を制御する制御部を有する、請求項1に記載の接合装置。
- 前記撮像ユニットは、前記第1撮像部の第1光軸を前記第1基板側に変更するとともに、前記第2撮像部の第2光軸を前記第1光軸と同軸上であって第2基板側に変更する反射ミラを有する、請求項1又は2に記載の接合装置。
- 前記第1撮像部は、前記第1保持部に形成された第1保持マークを撮像し、
前記第2撮像部は、前記第2保持部に形成された第2保持マークを撮像する、請求項1~3のいずれか一項に記載の接合装置。 - 前記第1保持部と前記第2保持部とを収容する処理容器と、
前記処理容器の外部から前記第1保持マークと前記第2保持マークを撮像ずる固定撮像部と、を有する、請求項4に記載の接合装置。 - 平面視において前記第1保持部と前記第2保持部から前記第1方向に離間した位置に設けられ、前記第1撮像部が撮像する第1基準マークと、
前記第1基準マークと対向して設けられ、前記第2撮像部が撮像する第2基準マークと、を有する、請求項1~5のいずれか一項に記載の接合装置。 - 第1基板と第2基板を接合する接合システムであって、
前記第1基板と前記第2基板を接合する接合装置を備えた処理ステーションと、
前記第1基板、前記第2基板又は前記第1基板と前記第2基板が接合された重合基板を、前記処理ステーションに対して搬入出する搬入出ステーションと、を有し、
前記接合装置は、
前記第1基板を保持する第1保持部と、
前記第1保持部と対向配置され、前記第2基板を保持する第2保持部と、
前記第1基板の接合面に形成された第1アライメントマークを撮像する第1撮像部と、前記第2基板の接合面に形成された第2アライメントマークを撮像する第2撮像部とを備えた、2つの撮像ユニットと、
前記第1保持部と前記第2保持部との間の平面領域内において、前記2つの撮像ユニットを第1方向に沿って移動させる第1移動機構と、
前記2つの撮像ユニットのうち第1撮像ユニットを、前記第1方向と直交する第2方向に沿って移動させる第2移動機構と、
前記2つの撮像ユニットのうち第2撮像ユニットを、前記第2方向に沿って移動させる第3移動機構と、を有する、接合システム。 - 接合装置を用いて第1基板と第2基板を接合する接合方法であって、
前記接合装置は、
前記第1基板を保持する第1保持部と、
前記第1保持部と対向配置され、前記第2基板を保持する第2保持部と、
前記第1基板の接合面に形成された第1アライメントマークを撮像する第1撮像部と、前記第2基板の接合面に形成された第2アライメントマークを撮像する第2撮像部とを備えた、2つの撮像ユニットと、
前記第1保持部と前記第2保持部との間の平面領域内において、前記2つの撮像ユニットを第1方向に沿って移動させる第1移動機構と、
前記2つの撮像ユニットのうち第1撮像ユニットを、前記第1方向と直交する第2方向に沿って移動させる第2移動機構と、
前記2つの撮像ユニットのうち第2撮像ユニットを、前記第2方向に沿って移動させる第3移動機構と、を有し、
前記接合方法は、
(a)前記第1保持部によって前記第1基板を保持する工程と、
(b)前記第2保持部によって前記第2基板を保持する工程と、
(c)前記第1移動機構によって前記第1撮像ユニットと前記第2撮像ユニットを前記第1方向に移動させる工程と、
(d)前記第2移動機構によって前記第1撮像ユニットを前記第2方向に移動させる工程と、
(e)前記第3移動機構によって前記第2撮像ユニットを前記第2方向に移動させる工程と、
(f)前記第1撮像ユニットと前記第2撮像ユニットのそれぞれによって、前記第1アライメントマークと前記第2アライメントマークを撮像する工程と、
(g)前記(f)工程で撮像した画像に基づいて、前記第1保持部に保持された前記第1基板と、前記第2保持部に保持された前記第2基板との水平方向位置を調整する工程と、を有する、接合方法。 - 前記(d)工程では、前記第1撮像ユニットを第1領域において移動させ、
前記(e)工程では、前記第2撮像ユニットを第2領域において移動させ、
前記(f)工程では、前記第1撮像ユニットによって第1領域を撮像し、前記第2撮像ユニットによって第2領域を撮像する、請求項8に記載の接合方法。 - 前記撮像ユニットは、前記第1撮像部の第1撮像経路を前記第1基板側に変更するとともに、前記第2撮像部の第2撮像経路を前記第1撮像経路と同軸上であって第2基板側に変更する反射ミラを有し、
前記(f)工程では、前記撮像ユニットによって前記第1アライメントマークと前記第2アライメントマークを同時に撮像する、請求項8又は9に記載の接合方法。 - 前記(g)工程の後、
前記第2移動機構によって前記第1撮像ユニットを前記第2方向に移動させ、
前記第3移動機構によって前記第2撮像ユニットを前記第2方向に移動させ、
前記第1撮像ユニットと前記第2撮像ユニットのそれぞれにおいて、前記第1撮像部によって前記第1保持部に形成された第1保持マークを撮像し、前記第2撮像部によって前記第2保持部に形成された第2保持マークを撮像する、請求項8~10のいずれか一項に記載の接合方法。 - 前記接合装置は、
平面視において前記第1撮像部と前記第2撮像部から離間して前記第1方向に沿った位置に設けられ、前記第1撮像部が撮像する第1基準マークと、
前記第1基準マークと対向して設けられ、前記第2撮像部が撮像する第2基準マークと、を有し、
前記(c)工程では、前記第1撮像部によって前記第1基準マークを撮像し、前記第2撮像部によって前記第2基準マークを撮像する、請求項8~11のいずれか一項に記載の接合方法。
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