WO2020153189A1 - 基板処理装置及び基板処理方法 - Google Patents
基板処理装置及び基板処理方法 Download PDFInfo
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- WO2020153189A1 WO2020153189A1 PCT/JP2020/001039 JP2020001039W WO2020153189A1 WO 2020153189 A1 WO2020153189 A1 WO 2020153189A1 JP 2020001039 W JP2020001039 W JP 2020001039W WO 2020153189 A1 WO2020153189 A1 WO 2020153189A1
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Images
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- 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
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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Definitions
- the present disclosure relates to a substrate processing apparatus and a substrate processing method.
- Patent Document 1 discloses a method for manufacturing a semiconductor device.
- the second main surface of the semiconductor substrate is ground to reduce the thickness of the semiconductor substrate to a desired thickness, and then a desired chemical liquid is discharged onto the ground second main surface of the semiconductor substrate. By doing so, the second main surface is subjected to etching treatment.
- the technique according to the present disclosure appropriately thins the surface of the substrate and then appropriately etches the surface of the substrate while removing metal contamination on the back surface of the substrate.
- One aspect of the present disclosure is a substrate processing apparatus for processing a superposed substrate in which a first substrate having a device layer formed thereon and a second substrate are bonded to each other, and a holding device for holding a back surface of the second substrate.
- a processing part that processes the first substrate held by the holding part, and a first processing liquid is supplied to a surface of the first substrate opposite to the device layer, and the first processing liquid is supplied.
- a first processing liquid supply unit that etches the front surface of the substrate, and a second processing liquid that supplies the second processing liquid to the back surface of the second substrate and removes metal contamination on the back surface of the second substrate. And a supply unit.
- the surface of the substrate can be appropriately etched while removing the metal contamination on the back surface of the substrate.
- a semiconductor wafer (hereinafter, referred to as a wafer) having a plurality of devices such as electronic circuits formed on the back surface
- the wafer is thinned by grinding.
- a damage layer including cracks and scratches is formed on the surface of the wafer. Since the damaged layer causes residual stress in the wafer, for example, the die strength of a chip obtained by dicing the wafer is weakened, which may cause cracking or chipping of the chip. Therefore, a stress relief process is performed to remove the damaged layer. Specifically, as the stress relief treatment, for example, as in the method disclosed in Patent Document 1, a desired chemical liquid is discharged onto the surface of the ground wafer to perform the etching treatment on the surface.
- the back surface of the wafer is held by a chuck containing a metal component such as alumina, and the wafer (chuck) and the grinding wheel are contacted with the grinding wheel contacting the front surface of the wafer. It is performed by rotating each.
- the back surface of the wafer is held by the chuck containing the metal component, the back surface is contaminated with the metal.
- FOUP Front Opening Unipod Pod
- the technology according to the present disclosure appropriately thins the front surface of a wafer and then appropriately etches the front surface of the wafer while removing metal contamination on the back surface of the wafer.
- a wafer processing system as a substrate processing apparatus and a wafer processing method as a substrate processing method according to the present embodiment will be described with reference to the drawings.
- elements having substantially the same functional configuration are designated by the same reference numerals, and duplicate description will be omitted.
- FIG. 1 is a plan view schematically showing the outline of the configuration of the wafer processing system 1.
- a processed wafer W as a first substrate and a support wafer S as a second substrate are bonded to a superposed wafer T as a superposed substrate. Perform desired processing. Then, in the wafer processing system 1, the processed wafer W is thinned.
- a surface to be processed (a surface opposite to the surface bonded to the support wafer S) is referred to as a front surface Wa, and a surface opposite to the front surface Wa is referred to as a back surface Wb.
- the surface bonded to the processing wafer W is referred to as the front surface Sa
- the back surface Sb the surface opposite to the front surface Sa
- the processing wafer W is, for example, a semiconductor wafer such as a silicon wafer, and the device layer D including a plurality of devices is formed on the back surface Wb. Further, an oxide film (not shown), for example, a SiO 2 film (TEOS film) is further formed on the device layer D.
- the peripheral edge We of the processed wafer W is chamfered, and the thickness of the cross section of the peripheral edge We decreases toward the tip thereof. Further, the peripheral edge portion We is a portion to be removed in the edge trim, and is in the range of 1 mm to 5 mm in the radial direction from the outer end portion of the processed wafer W, for example.
- the device layer D is not shown in order to avoid complexity of the drawing. Similarly, in other drawings used in the following description, illustration of the device layer D may be omitted.
- the support wafer S is a wafer that supports the processing wafer W, and is, for example, a silicon wafer.
- An oxide film (not shown) is formed on the surface Sa of the support wafer S.
- the support wafer S also functions as a protective material that protects the device layer D.
- a device layer (not shown) is formed on the front surface Sa similarly to the processed wafer W.
- a bonding area Aa where the device layer D and the surface Sa of the supporting wafer S are bonded and an unbonded area Ab that is an area radially outside the bonding area Aa are provided. Form. The presence of the unbonded region Ab in this manner allows the peripheral edge portion We to be appropriately removed.
- the wafer processing system 1 has a configuration in which a loading/unloading station 2 and a processing station 3 are integrally connected.
- the loading/unloading station 2 loads/unloads a cassette Ct capable of accommodating a plurality of overlapped wafers T with the outside, for example.
- the processing station 3 includes various processing devices that perform desired processing on the overlapped wafer T.
- the cassette loading table 10 is provided in the loading/unloading station 2.
- a plurality of, for example, three cassettes Ct can be mounted on the cassette mounting table 10 in a line in the Y-axis direction.
- the cassette Ct is, for example, FOUP.
- the number of cassettes Ct placed on the cassette placing table 10 is not limited to this embodiment, and can be arbitrarily determined.
- a wafer transfer device 20 is provided adjacent to the cassette mounting table 10 on the X axis negative direction side of the cassette mounting table 10.
- the wafer transfer device 20 is configured to be movable on a transfer path 21 extending in the Y-axis direction.
- the wafer transfer device 20 has, for example, two transfer arms 22, 22 that hold and transfer the overlapped wafer T.
- Each transfer arm 22 is configured to be movable in the horizontal direction, the vertical direction, around the horizontal axis, and around the vertical axis.
- the configuration of the transport arm 22 is not limited to this embodiment, and may have any configuration.
- the wafer transfer device 20 is configured to transfer the overlapped wafer T to the cassette Ct of the cassette mounting table 10 and the transition device 30 described later.
- the loading/unloading station 2 is provided with a transition device 30 for delivering the overlapped wafer T, adjacent to the wafer transfer device 20 on the X-axis negative direction side of the wafer transfer device 20.
- the processing station 3 is provided with, for example, three processing blocks G1 to G3.
- the first processing block G1, the second processing block G2, and the third processing block G3 are arranged in this order from the X-axis positive direction side (the loading/unloading station 2 side) to the negative direction side.
- the first processing block G1 is provided with an etching device 40, a cleaning device 41, and a wafer transfer device 50.
- the etching device 40 and the cleaning device 41 are arranged in layers.
- the number and arrangement of the etching device 40 and the cleaning device 41 are not limited to this.
- the etching device 40 and the cleaning device 41 may extend in the X-axis direction and may be placed side by side in parallel in a plan view.
- the etching device 40 and the cleaning device 41 may be stacked.
- the etching device 40 etches the front surface Wa of the processing wafer W ground by the processing device 80 described later.
- the specific configuration of the etching device 40 will be described later.
- the cleaning device 41 cleans the front surface Wa of the processed wafer W ground by the processing device 80 described later. For example, a brush is brought into contact with the front surface Wa to scrub and clean the front surface Wa. A pressurized cleaning liquid may be used for cleaning the front surface Wa. Further, the cleaning device 41 may have a configuration for cleaning the front surface Wa of the processing wafer W and the back surface Sb of the support wafer S.
- the wafer transfer device 50 is arranged on the Y axis negative direction side with respect to the etching device 40 and the cleaning device 41, for example.
- the wafer transfer device 50 has, for example, two transfer arms 51, 51 for holding and transferring the overlapped wafer T.
- Each transfer arm 51 is configured to be movable in the horizontal direction, the vertical direction, around the horizontal axis, and around the vertical axis.
- the configuration of the transfer arm 51 is not limited to this embodiment, and may have any configuration.
- the wafer transfer device 50 is configured to transfer the superposed wafer T to the transition device 30, the etching device 40, the cleaning device 41, and the reforming device 60 described later.
- the second processing block G2 is provided with a reforming device 60, a peripheral edge removing device 61, and a wafer transfer device 70.
- the reforming device 60 and the peripheral edge removing device 61 are arranged in layers. The number and arrangement of the reforming device 60 and the peripheral edge removing device 61 are not limited to this.
- the reforming device 60 irradiates the inside of the processed wafer W with a laser beam to form a peripheral reforming layer, a divided reforming layer, and an inner surface reforming layer.
- the specific configuration of the reformer 60 will be described later.
- the peripheral edge removing device 61 removes the peripheral edge portion We of the processing wafer W with the peripheral edge modified layer formed by the reforming device 60 as a starting point.
- the specific configuration of the peripheral edge removing device 61 will be described later.
- the wafer transfer device 70 is arranged, for example, on the Y axis positive direction side with respect to the reforming device 60 and the peripheral edge removing device 61.
- the wafer transfer device 70 has, for example, two transfer arms 71, 71 for holding and transferring the overlapped wafer T.
- Each transfer arm 71 is supported by an articulated arm member 72, and is configured to be movable in a horizontal direction, a vertical direction, around a horizontal axis, and around a vertical axis. The specific configuration of the transfer arm 71 will be described later.
- the wafer transfer device 70 is configured to transfer the superposed wafer T to the cleaning device 41, the reforming device 60, the peripheral edge removing device 61, and the processing device 80 described later.
- a processing device 80 as a processing unit is provided in the third processing block G3. Note that the number and arrangement of the processing devices 80 are not limited to the present embodiment, and a plurality of processing devices 80 may be arranged arbitrarily.
- the processing device 80 grinds the front surface Wa of the processing wafer W. Then, on the surface Wa on which the inner surface reforming layer is formed, the inner surface reforming layer is removed, and further the peripheral edge reforming layer is removed.
- the processing device 80 has a rotary table 81.
- the rotary table 81 is configured to be rotatable about a vertical rotation center line 82 by a rotation mechanism (not shown).
- two chucks 83 are provided as a holding unit for sucking and holding the overlapped wafer T.
- the chucks 83 are evenly arranged on the same circumference as the rotary table 81.
- the two chucks 83 can be moved to the delivery position A0 and the processing position A1 by rotating the rotary table 81.
- each of the two chucks 83 is configured to be rotatable about a vertical axis by a rotation mechanism (not shown).
- the chuck 83 contains a metal component such as alumina.
- the grinding unit 84 is arranged at the processing position A1.
- the grinding unit 84 grinds the front surface Wa of the processing wafer W.
- the grinding unit 84 has a grinding portion 85 provided with a grinding wheel (not shown) which is annular and rotatable.
- the grinding wheel contains, for example, a metal component.
- the grinding portion 85 is configured to be movable in the vertical direction along the column 86. Then, with the front surface Wa of the processed wafer W held by the chuck 83 in contact with the grinding wheel, the chuck 83 and the grinding wheel are rotated to grind the front surface Wa.
- the wafer processing system 1 described above is provided with the control device 90 as a control unit.
- the control device 90 is, for example, a computer and has a program storage unit (not shown).
- the program storage unit stores a program for controlling the processing of the overlapped wafer T in the wafer processing system 1.
- the program storage unit also stores a program for controlling the operation of drive systems such as the above-described various processing devices and transfer devices so as to realize substrate processing to be described later in the wafer processing system 1.
- the program may be recorded in a computer-readable storage medium H and may be installed in the control device 90 from the storage medium H.
- FIG. 4 is a vertical sectional view showing the outline of the configuration of the etching apparatus 40.
- the etching device 40 has a holding mechanism 100 that holds the overlapped wafer T.
- the holding mechanism 100 has a substantially disk-shaped base 101 having a diameter larger than that of the overlapped wafer T, and a plurality of holding members 102 provided on the outer peripheral portion of the base 101. As shown in FIG. 5, a recess 102a into which the outer edge of the support wafer S is fitted is formed on the side surface of the holding member 102. Then, as shown in FIG. 4, the supporting wafer S of the overlapped wafer T is held by the plurality of holding members 102.
- Each holding member 102 is configured to be horizontally movable by a moving mechanism (not shown).
- a rotation mechanism 103 is provided at the center of the base 101.
- the rotation mechanism 103 is connected to a rotation drive unit (not shown), and the rotation mechanism 103 is configured to rotate the base 101 and the overlapped wafer T held by the base 101.
- the rotation mechanism 103 is hollow.
- a first nozzle 110 as a first processing liquid supply unit is provided above the base 101.
- the first nozzle 110 is supported by the nozzle arm 111, and the nozzle arm 111 is provided with a moving mechanism 112.
- the first nozzle 110 is configured to be rotatable by a moving mechanism 112, and is also configured to be movable in the vertical direction.
- a supply pipe 113 is connected to the first nozzle 110 to supply an etching liquid as a first processing liquid and a rinse liquid to the front surface Wa of the processing wafer W.
- the supply pipe 113 is branched into an etching liquid supply pipe 114 and a rinse liquid supply pipe 115 on the side opposite to the first nozzle 110.
- An etching liquid supply source 116 that stores the etching liquid therein is connected to the etching liquid supply pipe 114.
- the etching liquid for example, a hydrofluoric nitric acid-based liquid such as HF or HNO 3 is used.
- the etching solution supply pipe 114 is provided with a valve 117 for controlling the supply of the etching solution.
- the surface Wa of the processing wafer W is etched by this etching liquid. Further, this etching liquid removes metal contamination on the front surface Wa of the processing wafer W.
- the rinse liquid supply pipe 115 is connected to a rinse liquid supply source 118 that stores a rinse liquid, for example, pure water inside. Further, the rinse liquid supply pipe 115 is provided with a valve 119 for controlling the supply of the rinse liquid.
- the nozzle for supplying the rinse liquid may be provided separately from the first nozzle 110.
- a second nozzle 120 as a second processing liquid supply unit is provided below the base 101.
- the second nozzle 120 is provided so as to project from the rotating mechanism 103 that is hollow.
- a supply pipe 121 is connected to the second nozzle 120 to supply a cleaning liquid as a second processing liquid and a rinse liquid to the back surface Sb of the support wafer S.
- the supply pipe 121 is inserted through the inside of the rotation mechanism 103 and is branched into a cleaning liquid supply pipe 122 and a rinse liquid supply pipe 123 on the side opposite to the second nozzle 120.
- a cleaning liquid supply source 122 for storing the cleaning liquid therein is connected to the cleaning liquid supply pipe 122.
- the cleaning liquid for example, FPM (hydrofluoric acid hydrogen peroxide aqueous solution), SC2 (hydrochloric acid hydrogen peroxide aqueous solution), or the like is used.
- the cleaning liquid supply pipe 122 is provided with a valve 125 for controlling the supply of the cleaning liquid. The cleaning liquid removes metal contamination on the back surface Sb of the support wafer S.
- the rinse liquid supply pipe 123 is connected to a rinse liquid supply source 126 that stores a rinse liquid, for example, pure water inside. Further, the rinse liquid supply pipe 123 is provided with a valve 127 that controls the supply of the rinse liquid. The nozzle for supplying the rinse liquid may be provided separately from the second nozzle 120.
- a cup 130 for receiving and collecting the liquid scattered or dropped from the overlapped wafer T is provided.
- a discharge pipe 131 for discharging the collected liquid and an exhaust pipe 132 for vacuuming and exhausting the atmosphere in the cup 130 are connected to the lower surface of the cup 130.
- FIG. 6 is a plan view showing the outline of the configuration of the reformer 60.
- FIG. 7 is a side view showing the outline of the configuration of the reformer 60.
- the reforming device 60 has a chuck 140 as a holding unit that holds the superposed wafer T on its upper surface.
- the chuck 140 sucks and holds the support wafer S in a state where the processing wafer W is on the upper side and the support wafer S is on the lower side.
- the chuck 140 includes a metal component such as alumina.
- the chuck 140 is supported by the slider table 142 via an air bearing 141.
- a rotating mechanism 143 is provided on the lower surface side of the slider table 142.
- the rotation mechanism 143 incorporates, for example, a motor as a drive source.
- the chuck 140 is configured to be rotatable about a vertical axis by a rotation mechanism 143 via an air bearing 141.
- the slider table 142 is configured to be movable along a rail 145 provided on the base 146 and extending in the Y-axis direction by a moving mechanism 144 provided on the lower surface side.
- the drive source of the moving mechanism 144 is not particularly limited, but for example, a linear motor is used.
- a laser head 150 as a reforming unit is provided above the chuck 140.
- the laser head 150 has a lens 151.
- the lens 151 is a cylindrical member provided on the lower surface of the laser head 150, and irradiates the processing wafer W held by the chuck 140 with laser light.
- the laser head 150 emits a high-frequency pulsed laser light oscillated from a laser light oscillator (not shown) having a wavelength that is transparent to the processing wafer W inside the processing wafer W.
- the light is focused and irradiated at a desired position.
- the portion where the laser light is focused inside the processed wafer W is modified, and the peripheral modified layer, the split modified layer, and the inner surface modified layer are formed.
- the laser head 150 is supported by the support member 152.
- the laser head 150 is configured to be vertically movable by an elevating mechanism 154 along a rail 153 extending in the vertical direction. Further, the laser head 150 is configured to be movable in the Y-axis direction by the moving mechanism 155.
- the lifting mechanism 154 and the moving mechanism 155 are supported by the support columns 156, respectively.
- a macro camera 160 and a micro camera 161 are provided above the chuck 140 and on the Y-axis positive direction side of the laser head 150.
- the macro camera 160 and the micro camera 161 are integrally configured, and the macro camera 160 is arranged on the Y-axis positive direction side of the micro camera 161.
- the macro camera 160 and the micro camera 161 are configured to be movable up and down by a lifting mechanism 162, and are further configured to be movable in the Y-axis direction by a moving mechanism 163.
- the macro camera 160 images the outer edge of the processed wafer W (overlapping wafer T).
- the macro camera 160 includes, for example, a coaxial lens, emits visible light, for example, red light, and further receives reflected light from an object. Note that, for example, the imaging magnification of the macro camera 160 is 2 times.
- the micro camera 161 images the peripheral portion of the processed wafer W and the boundary between the bonded area Aa and the unbonded area Ab.
- the micro camera 161 includes, for example, a coaxial lens, irradiates infrared light (IR light), and further receives reflected light from an object.
- IR light infrared light
- the imaging magnification of the micro camera 161 is 10 times, the field of view is about 1 ⁇ 5 of the macro camera 160, and the pixel size is about 1 ⁇ 5 of the macro camera 160.
- FIG. 8 is a plan view showing the outline of the configuration of the peripheral edge removing device 61.
- FIG. 9 is a side view showing the outline of the configuration of the peripheral edge removing device 61.
- the peripheral edge removing device 61 has a chuck 170 for holding the overlapped wafer T on its upper surface.
- the chuck 170 sucks and holds the support wafer S in a state where the processing wafer W is on the upper side and the support wafer S is on the lower side.
- the chuck 170 is configured to be rotatable about a vertical axis by a rotating mechanism 171.
- a pad 180 for holding and transferring the peripheral edge portion We of the processing wafer W is provided above the chuck 170.
- a suction mechanism (not shown) such as a vacuum pump is connected to the pad 180, and the pad 180 sucks and holds the peripheral edge portion We on the lower surface thereof.
- the pad 180 is provided with an elevating mechanism 181 that vertically elevates the pad 180 and a moving mechanism 182 that moves the pad 180 in the horizontal direction (X-axis direction and Y-axis direction).
- a detection unit 190 for confirming whether or not the peripheral edge portion We has been removed from the processed wafer W.
- the detection unit 190 detects the presence or absence of the peripheral edge We in the processed wafer W held by the chuck 170 and having the peripheral edge We removed.
- a sensor is used for the detection unit 190, for example.
- the sensor is, for example, a line type laser displacement meter, and detects the presence or absence of the peripheral edge portion We by irradiating the peripheral edge portion of the overlapped wafer T (processed wafer W) with a laser to measure the thickness of the overlapped wafer T. ..
- the detection method of the presence or absence of the peripheral edge portion We by the detection unit 190 is not limited to this.
- a line camera may be used as the detection unit 190, and the presence or absence of the peripheral edge portion We may be detected by imaging the overlapped wafer T (processed wafer W).
- a recovery unit (not shown) that recovers the peripheral edge We transferred by the pad 180 is provided below the chuck 170.
- the recovery unit accommodates and recovers the peripheral edge We that is suction-held by the pad 180.
- FIG. 10 is a vertical cross-sectional view showing the outline of the configuration of the transfer arm 71.
- the transfer arm 71 has a disk-shaped suction plate 200 having a larger diameter than the overlapped wafer T.
- a holding unit 210 that holds the central portion Wc of the processing wafer W is provided on the lower surface of the suction plate 200.
- a suction pipe 211 for sucking the central portion Wc is connected to the holding portion 210, and the suction pipe 211 communicates with a suction mechanism 212 such as a vacuum pump.
- the suction pipe 211 is provided with a pressure sensor 213 that measures suction pressure.
- the configuration of the pressure sensor 213 is arbitrary, but for example, a diaphragm type pressure gauge is used.
- a rotation mechanism 220 that rotates the suction plate 200 around a vertical axis is provided on the upper surface of the suction plate 200.
- the rotation mechanism 220 is supported by the support member 221.
- the support member 221 (rotation mechanism 220) is supported by the arm member 72.
- FIG. 11 is a flow chart showing the main steps of wafer processing.
- FIG. 12 is an explanatory diagram of main steps of wafer processing.
- the processing wafer W and the support wafer S are bonded to each other in the bonding apparatus (not shown) outside the wafer processing system 1 to form the overlapped wafer T in advance.
- the cassette Ct containing a plurality of overlapped wafers T shown in FIG. 12A is placed on the cassette placing table 10 of the loading/unloading station 2.
- the overlapped wafer T in the cassette Ct is taken out by the wafer transfer device 20 and transferred to the transition device 30.
- the wafer transfer device 50 takes out the overlapped wafer T of the transition device 30 and transfers it to the reforming device 60.
- the peripheral reforming layer M1 and the divided reforming layer M2 are sequentially formed inside the processing wafer W (steps A1 and A2 in FIG. 11), and further, FIG. As shown in c), the inner surface modified layer M3 is formed (step A3 in FIG. 11).
- the peripheral edge modifying layer M1 serves as a base point for removing the peripheral edge portion We in the edge trim.
- the divided reformed layer M2 serves as a base point for the removed peripheral edge portion We to be small pieces.
- the inner surface modification layer M3 serves as a base point for thinning the processed wafer W.
- the macro alignment position is a position where the macro camera 160 can capture an image of the outer edge of the processing wafer W.
- the macro camera 160 captures an image of the outer edge of the processed wafer W in the circumferential direction of 360 degrees.
- the captured image is output from the macro camera 160 to the control device 90.
- the controller 90 calculates the first eccentric amount of the center Cc of the chuck 140 and the center Cw of the processed wafer W from the image of the macro camera 160. Further, the control device 90 calculates the movement amount of the chuck 140 based on the first eccentricity amount so as to correct the Y-axis component of the first eccentricity amount.
- the chuck 140 moves in the Y-axis direction based on the calculated movement amount, and moves the chuck 140 to the micro alignment position.
- the micro alignment position is a position where the micro camera 161 can image the peripheral portion of the processing wafer W.
- the field of view of the micro camera 161 is as small as about 1/5 of that of the macro camera 160.
- the peripheral portion of the processing wafer W will be the micro camera.
- the micro camera 161 cannot capture an image because it does not enter the angle of view of 161. Therefore, the correction of the Y-axis component based on the first eccentric amount can also be said to be for moving the chuck 140 to the micro alignment position.
- the micro camera 161 captures an image of the boundary between the bonded area Aa and the unbonded area Ab of the processed wafer W in the circumferential direction of 360 degrees.
- the captured image is output from the micro camera 161 to the control device 90.
- the control device 90 calculates the second eccentric amount of the center Cc of the chuck 140 and the center Ca of the bonding area Aa from the image of the micro camera 161. Further, the control device 90 determines the position of the chuck 140 with respect to the peripheral modified layer M1 based on the second eccentric amount so that the center of the bonding area Aa and the center of the chuck 140 coincide with each other.
- laser light L1 (peripheral laser light L1) is emitted from the laser head 150, and the peripheral edge modifying layer M1 is applied to the boundary between the peripheral edge We and the central portion Wc of the processing wafer W. Are formed (step A1 in FIG. 11).
- the peripheral modified layer M1 is formed radially inward of the outer end of the bonding area Aa.
- the peripheral edge modifying layer M1 formed by the laser beam L1 is elongated in the thickness direction and has a vertically long aspect ratio.
- the lower end of the peripheral modified layer M1 is located above the target surface (dotted line in FIG. 13) of the thinned processed wafer W. That is, the distance H1 between the lower end of the peripheral modified layer M1 and the back surface Wb of the processed wafer W is larger than the target thickness H2 of the thinned processed wafer W. In this case, the peripheral modified layer M1 does not remain on the thinned processed wafer W.
- a crack C1 has grown from the peripheral modified layer M1 and has reached the front surface Wa and the back surface Wb.
- step A1 the rotating mechanism 143 rotates the chuck 140 and the moving mechanism 144 adjusts the position of the chuck 140 determined by the controller 90 so that the center of the bonding area Aa and the center of the chuck 140 coincide with each other.
- the chuck 140 is moved in the Y-axis direction. At this time, the rotation of the chuck 140 and the movement in the Y-axis direction are synchronized.
- the laser light L1 is irradiated from the laser head 150 to the inside of the processing wafer W. That is, the peripheral modified layer M1 is formed while correcting the second eccentricity amount. Then, the peripheral modified layer M1 is formed in an annular shape concentric with the bonding area Aa. That is, the distance D between the peripheral modified layer M1 and the outer end of the bonding area Aa shown in FIG. 13 can be made constant. Therefore, in the peripheral edge removing device 61, the peripheral edge portion We can be appropriately removed with the peripheral edge modifying layer M1 as a starting point.
- the chuck 140 when the second eccentricity amount has an X-axis component, the chuck 140 is rotated in the Y-axis direction and the chuck 140 is rotated to correct the X-axis component.
- the second amount of eccentricity when the second amount of eccentricity does not include the X-axis component, it is sufficient to move the chuck 140 in the Y-axis direction without rotating it.
- the laser head 150 is moved in the Y-axis direction, and laser light L2 (division laser light L2) is emitted from the laser head 150 as shown in FIGS.
- the divided reformed layer M2 is formed on the outer side in the direction (step A2 in FIG. 11).
- the divided modified layer M2 is also stretched in the thickness direction and has a vertically long aspect ratio.
- the divided reformed layer M2 is formed at the same height as the peripheral reformed layer M1. Further, the crack C2 has propagated from the divided modified layer M2 and reaches the front surface Wa and the back surface Wb.
- the divided reformed layers M2 of the line extending in the radial direction are formed at eight locations, but the number of divided reformed layers M2 is arbitrary. If at least the divided modified layer M2 is formed at two locations, the peripheral edge portion We can be removed. In this case, when the peripheral edge We is removed in the edge trim, the peripheral edge We is divided into a plurality of pieces by the division modified layer M2 while separating the annular peripheral modified layer M1 from the base point.
- the removed peripheral edge portion We is fragmented and can be removed more easily.
- the removal of the peripheral edge portion We is performed in order to avoid a sharp edged portion (so-called knife edge shape) of the peripheral edge portion We of the processed wafer W after grinding.
- the chuck 140 may be moved in the Y-axis direction.
- laser light L3 (laser light L3 for inner surface) is emitted from the laser head 150 to form the inner surface modified layer M3 along the surface direction (see FIG. 11).
- Step A3 The black arrow shown in FIG. 16 indicates the rotation direction of the chuck 140, and the same applies to the following description.
- the lower end of the inner surface modified layer M3 is located slightly above the target surface (dotted line in FIG. 15) of the processed wafer W after thinning. That is, the distance H3 between the lower end of the inner surface modified layer M3 and the back surface Wb of the processed wafer W is slightly larger than the target thickness H2 of the thinned processed wafer W.
- a crack C3 propagates in the surface direction from the inner surface modified layer M3.
- step A3 the chuck 140 (processed wafer W) is rotated, and the laser head 150 is moved from the outer peripheral portion of the processed wafer W toward the center in the Y-axis direction while being moved from the laser head 150 to the inside of the processed wafer W.
- the laser light L3 is emitted.
- the inner surface modified layer M3 is formed in a spiral shape from the outer side to the inner side in the surface of the processing wafer W.
- the chuck 140 may be moved in the Y-axis direction. Although the chuck 140 was rotated in forming the inner surface modified layer M3, the laser head 150 may be moved to rotate the laser head 150 relative to the chuck 140.
- the overlapped wafer T is carried out by the wafer transfer device 70.
- the overlapped wafer T is transferred to the peripheral edge removing device 61 by the wafer transfer device 70.
- the peripheral edge removing device 61 removes the peripheral edge portion We of the processed wafer W from the peripheral edge modified layer M1 as a base point (step A4 in FIG. 11).
- the lifting mechanism 181 lowers the pad 180 to suck and hold the peripheral edge portion We, and then raises the pad 180 further.
- the peripheral edge portion We held by the pad 180 is separated from the processed wafer W with the peripheral edge modified layer M1 as a base point.
- the peripheral edge portion We is divided into small pieces based on the divided reformed layer M2.
- the removed peripheral edge portion We is recovered from the pad 180 to a recovery unit (not shown).
- the overlapped wafer T is transferred to the processing device 80 by the wafer transfer device 70.
- the processing device 80 first, the overlapped wafer T is transferred from the transfer arm 71 to the chuck 83 at the transfer position A0.
- the front surface Wa side of the processed wafer W (hereinafter referred to as the front surface wafer Wa1) is separated from the inner surface modified layer M3 as a base point (step A5 in FIG. 11).
- step A5 the processing wafer W is suction-held by the suction plate 200 of the transfer arm 71, while the supporting wafer S is suction-held by the chuck 83. Then, the suction plate 200 is rotated, and the front surface wafer Wa1 is cut at the boundary of the inner surface reforming layer M3. Then, with the suction plate 200 sucking and holding the front surface wafer Wa1, the suction plate 200 is lifted to separate the front surface wafer Wa1 from the processing wafer W. At this time, the pressure sensor 213 measures the pressure for sucking the front surface wafer Wa1 to detect the presence or absence of the front surface wafer Wa1 and confirm whether or not the front surface wafer Wa1 is separated from the processing wafer W. The separated front surface wafer Wa1 is collected outside the wafer processing system 1.
- the chuck 83 is moved to the processing position A1.
- the grinding unit 84 grinds the front surface Wa of the processed wafer W held by the chuck 83 as shown in FIG. 12(f) to remove the inner surface modified layer M3 and the peripheral modified layer M1 remaining on the front surface Wa. It is removed (step A6 in FIG. 11).
- the processing wafer W and the grinding wheel are rotated while the grinding wheel is in contact with the surface Wa to grind the surface Wa.
- the front surface Wa of the processed wafer W may be cleaned with the cleaning liquid using a cleaning liquid nozzle (not shown).
- the overlapped wafer T is transferred to the cleaning device 41 by the wafer transfer device 70.
- the surface Wa which is the ground surface of the processed wafer W, is scrubbed and cleaned (step A7 in FIG. 11).
- the back surface Sb of the support wafer S may be cleaned together with the front surface Wa of the processing wafer W.
- the overlapped wafer T is transferred by the wafer transfer device 50 to the etching device 40.
- the etching apparatus 40 etches the front surface Wa of the processing wafer W and removes metal contamination on the back surface Sb of the support wafer S (step A8 in FIG. 11).
- Step A8 first, the overlapped wafer T is transferred from the wafer transfer device 50 to the holding mechanism 100 and held.
- the etching liquid E1 is supplied from the first nozzle 110 to the front surface Wa of the processing wafer W while the superposed wafer T held by the holding mechanism 100 is being rotated by the rotating mechanism 103.
- the surface Wa of the processing wafer W is etched by the etching liquid E1.
- a damage layer is formed on the surface Wa ground by the processing device 80 described above.
- the damage layer can be removed to remove stress, and the surface Wa can be smoothed.
- the back surface Sb of the supporting wafer S is held by the chuck 83 containing a metal component when the front surface Wa is ground by the above-described processing apparatus 80, metal dust may be generated and wrap around the front surface Wa. is there.
- the metal since grinding is performed with a grinding wheel containing a metal component, the metal may still adhere to the surface Wa. Further, also in the reforming apparatus 60, since the back surface Sb of the support wafer S is held by the chuck 140 containing the metal component, metal dust may be generated and wrap around the front surface Wa. On the other hand, the etching liquid E1 can also remove metal contamination on the front surface Wa of the processing wafer W.
- the etching liquid E1 is supplied from the first nozzle 110 to the front surface Wa of the processing wafer W, and at the same time, the cleaning liquid E2 is supplied from the second nozzle 120 to the back surface Sb of the supporting wafer S.
- the back surface Sb is contaminated with the metal.
- the cleaning liquid E2 can remove metal contamination on the back surface Sb of the support wafer S.
- the etching liquid E1 does not reach the device layer D and the cleaning liquid E2 reaches the device layer D on the side of the overlapped wafer T.
- the supply amount of the cleaning liquid E2 supplied from the second nozzle 120 may be larger than the supply amount of the etching liquid E1 supplied from the first nozzle 110. In such a case, it is possible to prevent the device layer D from being etched by the etching liquid E1 and protect the device layer D.
- the time for etching the front surface Wa with the etching liquid E1 and the time for removing the metal contamination on the back surface Sb with the cleaning liquid E2 are the same. Specifically, the time is adjusted by adjusting the concentration and temperature of each of the etching liquid E1 and the cleaning liquid E2. The start timing and the end timing of etching the front surface Wa and removing the metal contamination on the back surface Sb are the same.
- the superposed wafer T that has undergone all the processes is transferred to the transition device 30 by the wafer transfer device 50, and further transferred to the cassette Ct of the cassette mounting table 10 by the wafer transfer device 20. In this way, a series of wafer processing in the wafer processing system 1 is completed.
- step A8 the front surface Wa of the processing wafer W is etched with the etching liquid E1 and the metal contamination of the back surface Sb of the supporting wafer S is removed with the cleaning liquid E2. Therefore, the overlapped wafer T after performing step A8 can be brought into a clean state and can be returned to the cassette Ct. As a result, it is possible to suppress the inside of the cassette Ct from being contaminated with metal, and it is possible to appropriately perform the subsequent processing. Further, it is not necessary to replace the cassette Ct.
- the throughput of wafer processing was reduced.
- the etching apparatus 40 since the etching apparatus 40 performs the etching of the front surface Wa and the removal of the metal contamination on the back surface Sb, the throughput of wafer processing can be improved.
- step A8 the etching by the etching liquid E1 and the removal of the metal contamination by the cleaning liquid E2 are simultaneously performed, so that the throughput of the wafer processing can be further improved. It should be noted that the etching and the removal of metal contamination do not have to be performed at the same time, and may be performed continuously, for example.
- step A8 the end timing of the etching with the etching liquid E1 and the end timing of the removal of the metal contamination with the cleaning liquid E2 are the same, so that the subsequent rinse processing can be performed at the same time. As a result, the throughput of wafer processing can be further improved.
- the etching time with the etching liquid E1 and the removal time of the metal contamination with the cleaning liquid E2 are set to be the same, and the respective end timings are the same.
- the removal time may be different.
- the end timings can be made the same by shifting the start timings of etching and metal contamination removal.
- the supply start timing of the cleaning liquid E2 from the second nozzle 120 is controlled according to the etching time.
- a hydrofluoric nitric acid-based solution such as HF or HNO 3
- an acidic etching solution is used as the etching solution E1
- an alkaline etching solution such as TMAH, Choline, or KOH is used.
- TMAH, Choline, or KOH is used as the etching solution E1
- TMAH, Choline, or KOH is used as the etching solution E1
- TMAH TMAH, Choline, or KOH
- the target etching height of the front surface Wa is sufficiently higher than the upper surface of the device layer D
- an acidic etching solution may be used and then an alkaline etching solution may be used. If the surface Wa is etched only with an acidic etching solution, the etching rate is high, so overetching may occur and the device layer D may also be etched. Therefore, by etching the surface Wa to a certain extent with an acidic etching solution and then switching to alkaline etching to perform etching, such over-etching can be prevented.
- a protective film P for protecting the device layer D is formed between the back surface Wb of the processed wafer W and the device layer D as shown in FIG. May be.
- an oxide film is used for the protective film P, and the alkaline etching solution does not etch the protective film P.
- the protective film P can prevent the etchant from reaching the device layer D.
- the surface Wa may be etched using only an alkaline etching solution.
- the peripheral edge of the support wafer S may be cleaned after the front surface Wa is ground in step A6 and before the front surface Wa is etched and the back surface Sb is removed of metal contamination in step A8.
- the cleaning of the peripheral portion of the support wafer S is performed by using the peripheral cleaning device 230 shown in FIG. 19, for example.
- the peripheral edge cleaning device 230 is provided by being stacked on the etching device 40 and the cleaning device 41 in the first processing block G1, for example.
- the peripheral edge cleaning device 230 has an upper nozzle 231 and a lower nozzle 232 as a peripheral edge removing unit.
- the upper nozzle 231 supplies the cleaning liquid to the peripheral portion of the support wafer S from above.
- the lower nozzle 232 supplies the cleaning liquid to the peripheral portion of the support wafer S from below.
- the upper nozzle 231 and the lower nozzle 232 are in communication with a cleaning liquid supply source (not shown) that stores the cleaning liquid therein.
- the peripheral edge cleaning device 230 also has a spin chuck (not shown) that rotates and holds the overlapped wafer T. Then, with the superposed wafer T held by the spin chuck and rotated, a cleaning liquid is supplied from the upper nozzle 231 and the lower nozzle 232 to the peripheral portion of the supporting wafer S to clean the peripheral portion. The used cleaning liquid is collected in a cup (not shown) provided around the spin chuck.
- the cleaning liquid E2 does not go around the peripheral portion of the support wafer S, and it may be insufficient to remove the metal contamination of the peripheral portion. .. Even in such a case, the metal cleaning of the peripheral portion of the support wafer S can be appropriately removed in the peripheral cleaning device 230.
- FIG. 20 is a plan view schematically showing the outline of the configuration of the wafer processing system 300.
- FIG. 21 is a flow chart showing the main steps of wafer processing.
- the wafer processing system 300 is obtained by omitting the processing device 80 from the configuration of the wafer processing system 1 of the first embodiment.
- the peripheral modified layer M1 is formed (step B1 in FIG. 21), the divided modified layer M2 is formed (step B2 in FIG. 21), and the inner surface modified layer M3 is formed. (Step B3 of FIG. 21), removal of the peripheral edge portion We (step B4 of FIG. 21), separation of the front surface wafer Wa1 (step B5 of FIG. 21), and cleaning of the front surface Wa (step B6 of FIG. 21) are sequentially performed. These steps B1 to B6 are the same as the steps A1 to A5 and A7 of the first embodiment, respectively.
- the etching device 40 the front surface Wa is etched by the etching liquid E1 and the metal contamination on the back surface Sb is removed by the cleaning liquid E2 (step B7 in FIG. 21).
- the grinding of the surface Wa of the processed wafer W in step A6 in the first embodiment is omitted, and in step B7, the thinning of the surface Wa by the grinding is performed by the etching solution E1. Etching is performed.
- FIG. 20 is a plan view schematically showing the outline of the configuration of the wafer processing system 400.
- the wafer processing system 400 in thinning the surface Wa of the processed wafer W, instead of forming the inner surface modified layer M3 and separating the surface wafer Wa1 as in the first embodiment, the surface Wa is removed. Grind.
- the wafer processing system 400 has a configuration including a processing device 410 instead of the processing device 80 of the wafer processing system 1 of the first embodiment.
- the processing device 410 grinds the front surface Wa of the processing wafer W.
- the processing device 410 includes a rotary table 420, a rough grinding unit 430, a middle grinding unit 440, and a finish grinding unit 450.
- the rotary table 420 is configured to be rotatable about a vertical rotation center line 421 by a rotation mechanism (not shown).
- a rotation mechanism (not shown).
- four chucks 422 as a holding unit for sucking and holding the overlapped wafer T are provided.
- the chucks 422 are evenly arranged on the same circumference as the rotary table 420, that is, arranged at every 90 degrees.
- the four chucks 422 can be moved to the delivery position A0 and the processing positions A1 to A3 by rotating the rotary table 420.
- each of the four chucks 422 is configured to be rotatable about a vertical axis by a rotation mechanism (not shown).
- the chuck 422 contains a metal component such as alumina.
- the delivery position A0 is a position on the X-axis positive direction side and the Y-axis positive direction side of the rotary table 420, and the overlapped wafer T is delivered.
- the first processing position A1 is a position on the X-axis negative direction side and the Y-axis positive direction side of the rotary table 420, and the rough grinding unit 430 is arranged.
- the second processing position A2 is a position on the X-axis negative direction side and the Y-axis negative direction side of the rotary table 420, and the intermediate grinding unit 440 is arranged.
- the third processing position A3 is a position on the X-axis positive direction side and the Y-axis negative direction side of the rotary table 420, and the finish grinding unit 450 is arranged.
- the rough grinding unit 430 roughly grinds the surface Wa of the processing wafer W.
- the rough grinding unit 430 has a rough grinding portion 431 having a ring-shaped rotatable coarse grinding wheel (not shown).
- the rough grinding wheel contains, for example, a metal component.
- the rough grinding portion 431 is configured to be movable in the vertical direction along the support column 432. Then, in a state where the surface Wa of the processed wafer W held by the chuck 422 is brought into contact with the rough grinding wheel, the chuck 422 and the rough grinding wheel are respectively rotated to roughly grind the surface Wa.
- the intermediate grinding unit 440 the surface Wa of the processing wafer W is subjected to intermediate grinding.
- the intermediate grinding unit 440 has an intermediate grinding unit 441 having an annularly rotatable intermediate grinding wheel (not shown).
- the medium grinding wheel contains, for example, a metal component.
- the intermediate grinding portion 441 is configured to be vertically movable along the support column 442. The grain size of the medium grinding wheel is smaller than that of the rough grinding wheel. Then, with the surface Wa of the processed wafer W held by the chuck 422 in contact with the medium grinding wheel, the chuck 422 and the medium grinding wheel are respectively rotated to perform the medium grinding of the surface Wa.
- the surface Wa of the processed wafer W is finish ground.
- the finish grinding unit 450 has a finish grinding section 451 having a ring-shaped rotatable finish grinding wheel (not shown).
- the finish grinding wheel contains, for example, a metal component.
- the finish grinding section 451 is configured to be movable in the vertical direction along the support column 452.
- the particle size of the abrasive grains of the finish grinding wheel is smaller than that of the medium grinding wheel. Then, with the surface Wa of the processed wafer W held by the chuck 422 in contact with the finishing grinding wheel, the chuck 422 and the finishing grinding wheel are rotated to finish-grind the surface Wa.
- FIG. 23 is a flowchart showing the main steps of wafer processing.
- FIG. 24 is an explanatory diagram of main steps of wafer processing.
- the peripheral reforming layer M1 is formed inside the processing wafer W (step C1 in FIG. 23) and further divided.
- the modified layer M2 is formed (step C2 in FIG. 23).
- step C3 is the same as step A4 of the first embodiment.
- the front surface Wa of the processing wafer W is ground.
- the overlapped wafer T transported to the processing device 410 is delivered to the chuck 422 at the delivery position A0.
- the chuck 422 is moved to the first processing position A1.
- the surface Wa of the processed wafer W is roughly ground by the rough grinding unit 430 as shown in FIG. 24D (step C4 in FIG. 23).
- the chuck 422 is moved to the second processing position A2. Then, the surface Wa of the processing wafer W is ground by the middle grinding unit 440 (step C5 in FIG. 23).
- the chuck 422 is moved to the third processing position A3.
- the finish grinding unit 450 finish polishes the front surface Wa of the processed wafer W (step C6 in FIG. 23).
- the chuck 422 is moved to the delivery position A0.
- the front surface Wa of the processed wafer W may be cleaned with the cleaning liquid using a cleaning liquid nozzle (not shown).
- step C7 is the same as step A7 of the first embodiment.
- step C8 is the same as step A8 of the first embodiment.
- the wafer processing system 400 performs a series of wafer processing. Also in the third embodiment, the same effect as that of the first embodiment can be enjoyed.
- the peripheral edge We is removed by holding the peripheral edge We with the pad 180 in the peripheral edge removing device 61 in the above embodiment, but the removing method is not limited to this.
- the peripheral edge portion We may be removed by applying physical impact or ultrasonic waves.
- the separation of the front surface wafer Wa1 from the processed wafer W is performed when the overlapping wafer T is transferred from the transfer arm 71 of the wafer transfer device 70 to the chuck 83 of the processing device 80.
- a separating device may be provided in the same device as the peripheral edge removing device 61, or a separating device (not shown) may be provided separately.
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Abstract
Description
40 エッチング装置
110 第1のノズル
120 第2のノズル
D デバイス層
E1 エッチング液
E2 洗浄液
S 支持ウェハ
T 重合ウェハ
W 処理ウェハ
Claims (20)
- デバイス層が形成された第1の基板と第2の基板とが接合された重合基板を処理する基板処理装置であって、
前記第2の基板の裏面を保持する保持部と、
前記保持部に保持された前記第1の基板を処理する処理部と、
前記第1の基板において前記デバイス層と反対側の表面に第1の処理液を供給し、当該第1の基板の表面をエッチングする第1の処理液供給部と、
前記第2の基板の裏面に第2の処理液を供給し、当該第2の基板の裏面における金属汚染を除去する第2の処理液供給部と、を有する、基板処理装置。 - 前記第1の処理液供給部と前記第2の処理液供給部を制御する制御部を有し、
前記制御部は、前記第1の処理液によるエッチングと、前記第2の処理液による金属汚染除去とを同時に行うように、前記第1の処理液供給部と前記第2の処理液供給部を制御する、請求項1に記載の基板処理装置。 - 前記制御部は、前記第1の処理液によるエッチングの終了時と、前記第2の処理液による金属汚染除去の終了時とが同じになるように、前記第1の処理液供給部と前記第2の処理液供給部を制御する、請求項2に記載の基板処理装置。
- 前記第1の処理液供給部と前記第2の処理液供給部を制御する制御部を有し、
前記制御部は、前記重合基板の側方において、前記第1の処理液が前記デバイス層に到達せず、前記第2の処理液が前記デバイス層に到達するように、前記第1の処理液供給部と前記第2の処理液供給部を制御する、請求項1~3のいずれか一項に記載の基板処理装置。 - 前記第1の処理液は、酸性の処理液とアルカリ性の処理液を含む、請求項1~4のいずれか一項に記載の基板処理装置。
- 前記第1の処理液供給部を制御する制御部を有し、
前記第1の基板の裏面と前記デバイス層との間には、前記アルカリ性の処理液から前記デバイス層を保護する保護膜が形成され、
前記制御部は、前記第1の基板の表面に前記酸性の処理液を供給した後、前記アルカリ性の処理液を供給するように、前記第1の処理液供給部を制御する、請求項5に記載の基板処理装置。 - 前記第1の基板の内部に、面方向に沿ってレーザ光を照射して内部面改質層を形成する、前記処理部である改質部と、
前記改質部で形成された内部面改質層を基点に、前記第1の基板を分離する分離部と、
前記分離部で前記第1の基板が分離された後、前記第2の基板に接合された前記第1の基板の表面を研削加工する、前記処理部である加工部と、を有し、
前記第1の処理液供給部は、前記加工部で研削加工された前記第1の基板の表面に前記第1の処理液を供給する、請求項1~6のいずれか一項に記載の基板処理装置。 - 前記第1の基板の内部に、面方向に沿ってレーザ光を照射して内部面改質層を形成する、前記処理部である改質部と、
前記改質部で形成された内部面改質層を基点に、前記第1の基板を分離する分離部と、を有し、
前記第1の処理液供給部は、前記分離部で前記第1の基板が分離された後、前記第2の基板に接合された前記第1の基板の表面に前記第1の処理液を供給する、請求項1~6のいずれか一項に記載の基板処理装置。 - 前記第1の基板の表面を研削加工する、前記処理部である加工部を有し、
前記第1の処理液供給部は、前記加工部で研削加工された前記第1の基板の表面に前記第1の処理液を供給する、請求項1~6のいずれか一項に記載の基板処理装置。 - 前記第2の処理液供給部によって前記第2の基板の裏面に前記第2の処理液を供給する前に、前記第2の基板の周縁部を洗浄する周縁洗浄部を有する、請求項1~9のいずれか一項に記載の基板処理装置。
- デバイス層が形成された第1の基板と第2の基板とが接合された重合基板を処理する基板処理方法であって、
前記第2の基板の裏面が保持部に保持された状態で、前記第1の基板を処理することと、
前記第1の基板において前記デバイス層と反対側の表面に第1の処理液供給部から第1の処理液を供給し、当該第1の基板の表面をエッチングすることと、
前記第2の基板の裏面に第2の処理液供給部から第2の処理液を供給し、当該第2の基板の裏面における金属汚染を除去することと、を有する、基板処理方法。 - 前記第1の処理液によるエッチングと、前記第2の処理液による金属汚染除去とを同時に行う、請求項11に記載の基板処理方法。
- 前記第1の処理液によるエッチングの終了時と、前記第2の処理液による金属汚染除去の終了時とは同じである、請求項12に記載の基板処理方法。
- 前記重合基板の側方において、前記第1の処理液が前記デバイス層に到達せず、前記第2の処理液が前記デバイス層に到達する、請求項11~13のいずれか一項に記載の基板処理方法。
- 前記第1の処理液は、酸性の処理液とアルカリ性の処理液を含む、請求項11~14のいずれか一項に記載の基板処理方法。
- 前記第1の基板の裏面と前記デバイス層との間には、前記アルカリ性の処理液から前記デバイス層を保護する保護膜が形成され、
前記第1の基板の表面に前記酸性の処理液を供給した後、前記アルカリ性の処理液を供給する、請求項15に記載の基板処理方法。 - 改質部から前記第1の基板の内部に、面方向に沿ってレーザ光を照射して内部面改質層を形成することと、
分離部によって、前記改質部で形成された内部面改質層を基点に、前記第1の基板を分離することと、
前記分離部で前記第1の基板が分離された後、加工部によって、前記第2の基板に接合された前記第1の基板の表面を研削加工することと、を有し、
前記第1の処理液供給部は、前記加工部で研削加工された前記第1の基板の表面に前記第1の処理液を供給する、請求項11~16のいずれか一項に記載の基板処理方法。 - 改質部から前記第1の基板の内部に、面方向に沿ってレーザ光を照射して内部面改質層を形成することと、
分離部によって、前記改質部で形成された内部面改質層を基点に、前記第1の基板を分離することと、を有し、
前記第1の処理液供給部は、前記分離部で前記第1の基板が分離された後、前記第2の基板に接合された前記第1の基板の表面に前記第1の処理液を供給する、請求項11~16のいずれか一項に記載の基板処理方法。 - 加工部によって前記第1の基板の表面を研削加工することを有し、
前記第1の処理液供給部は、前記加工部で研削加工された前記第1の基板の表面に前記第1の処理液を供給する、請求項11~16のいずれか一項に記載の基板処理方法。 - 前記第2の処理液供給部によって前記第2の基板の裏面に前記第2の処理液を供給する前に、周縁洗浄部によって前記第2の基板の周縁部を洗浄する、請求項11~19のいずれか一項に記載の基板処理方法。
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