WO2021070661A1 - 接合システムおよび重合基板の検査方法 - Google Patents
接合システムおよび重合基板の検査方法 Download PDFInfo
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- WO2021070661A1 WO2021070661A1 PCT/JP2020/036623 JP2020036623W WO2021070661A1 WO 2021070661 A1 WO2021070661 A1 WO 2021070661A1 JP 2020036623 W JP2020036623 W JP 2020036623W WO 2021070661 A1 WO2021070661 A1 WO 2021070661A1
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- substrate
- inspection
- measurement
- control unit
- polymerized
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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
- H01L21/67121—Apparatus for making assemblies not otherwise provided for, e.g. package constructions
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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- H—ELECTRICITY
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- 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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- H01L21/68—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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- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
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- H01L22/10—Measuring as part of the manufacturing process
- H01L22/12—Measuring as part of the manufacturing process for structural parameters, e.g. thickness, line width, refractive index, temperature, warp, bond strength, defects, optical inspection, electrical measurement of structural dimensions, metallurgic measurement of diffusions
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- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
Definitions
- This disclosure relates to a bonding system and a method for inspecting a polymerized substrate.
- a bonding system including a bonding device for forming a polymerized substrate by bonding substrates such as semiconductor wafers and an inspection device for inspecting the polymerized substrate formed by the bonding device is known (Patent Document 1). reference).
- the present disclosure provides a technique capable of improving throughput while ensuring the measurement accuracy of an inspection device.
- the joining system includes a joining device, an inspection device, and a control unit.
- the joining device forms a polymerized substrate by joining the first substrate and the second substrate.
- the inspection device inspects the polymerized substrate.
- the control unit controls the inspection device. Further, the control unit includes a measurement control unit, a comparison unit, and a remeasurement control unit.
- the measurement control unit causes the inspection device to measure the polymerized substrate at the first number of measurement points.
- the comparison unit compares the inspection result including the amount of deviation between the first substrate and the second substrate in the polymerization substrate derived from the measurement result with the reference. Based on the comparison result by the comparison unit, the remeasurement control unit causes the inspection device to remeasure the polymerized substrate with a second measurement point that is larger than the first measurement point.
- FIG. 1 is a schematic view showing a configuration of a joining system according to an embodiment.
- FIG. 2 is a schematic view showing a state before joining the first substrate and the second substrate according to the embodiment.
- FIG. 3 is a schematic view showing the configuration of the joining device according to the embodiment.
- FIG. 4 is a schematic view showing the configuration of the inspection device according to the embodiment.
- FIG. 5 is a schematic view showing a configuration of a holding unit of the inspection device according to the embodiment.
- FIG. 6 is a diagram showing an example of a method of imaging a measurement mark.
- FIG. 7 is a diagram showing an example of the measurement mark.
- FIG. 8 is a block diagram showing a configuration of a control device according to an embodiment.
- FIG. 9 is a diagram showing an example of measurement points set in the measurement process.
- FIG. 10 is a diagram for explaining an example of reference information.
- FIG. 11 is a diagram showing an example of determination processing by the determination unit.
- FIG. 12 is a diagram showing an example of measurement points set in the remeasurement process.
- FIG. 13 is a flowchart showing an example of the procedure of the process performed by the bonding system until the polymerized substrate is formed by the bonding device.
- FIG. 14 is a flowchart showing an example of the processing procedure of the inspection process.
- FIG. 15 is a diagram showing a first modification of the measurement point set in the measurement process.
- FIG. 16 is a diagram showing a second modification of the measurement points set in the measurement process.
- FIG. 17 is a diagram showing a modified example of the measurement point set in the remeasurement process.
- the embodiment a mode for carrying out the inspection method of the bonding system and the polymerized substrate according to the present disclosure (hereinafter, referred to as “the embodiment”) will be described in detail with reference to the drawings. It should be noted that this embodiment does not limit the inspection method of the bonding system and the polymerized substrate according to the present disclosure. In addition, each embodiment can be appropriately combined as long as the processing contents do not contradict each other. Further, in each of the following embodiments, the same parts are designated by the same reference numerals, and duplicate description is omitted.
- FIG. 1 is a schematic view showing a configuration of a joining system according to an embodiment.
- FIG. 2 is a schematic view showing a state before joining the first substrate and the second substrate according to the embodiment.
- the bonding system 1 shown in FIG. 1 forms a polymerization substrate T by bonding the first substrate W1 and the second substrate W2 (see FIG. 2).
- the first substrate W1 and the second substrate W2 are substrates in which a plurality of electronic circuits are formed on a semiconductor substrate such as a silicon wafer or a compound semiconductor wafer.
- the first substrate W1 and the second substrate W2 have substantially the same diameter.
- One of the first substrate W1 and the second substrate W2 may be, for example, a substrate on which no electronic circuit is formed.
- the plate surface on the side to be joined to the second substrate W2 is referred to as “joining surface W1j", and is on the side opposite to the joining surface W1j.
- the plate surface is described as "non-bonded surface W1n”.
- the plate surface on the side to be joined to the first substrate W1 is described as “joining surface W2j”
- the plate surface on the side opposite to the joining surface W2j is “non-joining surface W2n”.
- the joining system 1 includes a loading / unloading station 2, a processing station 3, and an inspection station 4.
- the carry-in / out station 2 is arranged on the negative side of the X-axis of the processing station 3 and is integrally connected to the processing station 3.
- the inspection station 4 is arranged on the X-axis positive direction side of the processing station 3 and is integrally connected to the processing station 3.
- the loading / unloading station 2 includes a mounting table 10 and a transport area 20.
- the mounting table 10 includes a plurality of mounting plates 11.
- Cassettes C1 to C4 for horizontally accommodating a plurality of (for example, 25) substrates are mounted on each mounting plate 11.
- the cassette C1 can accommodate a plurality of first substrates W1
- the cassette C2 can accommodate a plurality of second substrates W2
- the cassette C3 can accommodate a plurality of polymerization substrates T.
- the cassette C4 is, for example, a cassette for collecting a defective substrate.
- the number of cassettes C1 to C4 mounted on the mounting plate 11 is not limited to the one shown in the figure.
- the transport area 20 is arranged adjacent to the X-axis positive direction side of the mounting table 10.
- the transport region 20 is provided with a transport path 21 extending in the Y-axis direction and a transport device 22 that can move along the transport path 21.
- the transport device 22 can move not only in the Y-axis direction but also in the X-axis direction and can rotate around the Z-axis.
- the transport device 22 is formed between the cassettes C1 to C4 mounted on the mounting plate 11 and the third processing block G3 of the processing station 3, which will be described later, of the first substrate W1, the second substrate W2, and the polymerization substrate T. Carry out.
- the processing station 3 is provided with, for example, three processing blocks G1, G2, and G3.
- the first processing block G1 is arranged on the back surface side (Y-axis positive direction side in FIG. 1) of the processing station 3.
- the second processing block G2 is arranged on the front side of the processing station 3 (the negative direction side of the Y axis in FIG. 1)
- the third processing block G3 is on the loading / unloading station 2 side of the processing station 3 (X in FIG. 1). It is placed on the negative axis side).
- a surface reforming device 30 that modifies the joint surfaces W1j and W2j of the first substrate W1 and the second substrate W2 is arranged.
- the surface modifier 30 cuts the bond of SiO2 on the bonding surfaces W1j and W2j of the first substrate W1 and the second substrate W2 to form a single-bonded SiO, so that the bonding surface W1j can be easily hydrophilized thereafter. , W2j is modified.
- the surface reformer 30 for example, oxygen gas or nitrogen gas, which is a processing gas, is excited to be turned into plasma and ionized in a reduced pressure atmosphere. Then, by irradiating the joint surfaces W1j and W2j of the first substrate W1 and the second substrate W2 with such oxygen ions or nitrogen ions, the joint surfaces W1j and W2j are plasma-treated and modified.
- oxygen gas or nitrogen gas which is a processing gas
- a surface hydrophilic device 40 is arranged in the first treatment block G1.
- the surface hydrophilization device 40 hydrophilizes the joint surfaces W1j and W2j of the first substrate W1 and the second substrate W2 with pure water, and cleans the joint surfaces W1j and W2j.
- the surface hydrophilization device 40 supplies pure water onto the first substrate W1 or the second substrate W2 while rotating the first substrate W1 or the second substrate W2 held by the spin chuck, for example. ..
- the pure water supplied on the first substrate W1 or the second substrate W2 diffuses on the joint surfaces W1j and W2j of the first substrate W1 or the second substrate W2, and the joint surfaces W1j and W2j are hydrophilized. ..
- the surface modifier 30 and the surface hydrophilizer 40 are arranged side by side, but the surface hydrophilizer 40 may be laminated above the surface modifier 30.
- a joining device 41 is arranged in the second processing block G2.
- the joining device 41 joins the hydrophilized first substrate W1 and the second substrate W2 by an intermolecular force.
- the configuration of the joining device 41 will be described later.
- a transport region 60 is formed in the region surrounded by the first processing block G1, the second processing block G2, and the third processing block G3.
- a transport device 61 is arranged in the transport region 60.
- the transport device 61 has, for example, a transport arm that is movable in the vertical direction, the horizontal direction, and around the vertical axis.
- the transfer device 61 moves in the transfer area 60, and the first substrate W1 and the second are connected to predetermined devices in the first processing block G1, the second processing block G2, and the third processing block G3 adjacent to the transport area 60.
- the substrate W2 and the polymerization substrate T are conveyed.
- the inspection station 4 is provided with an inspection device 80.
- the inspection device 80 inspects the polymerization substrate T formed by the joining device 41.
- the joining system 1 includes a control device 70.
- the control device 70 controls the operation of the joining system 1.
- the configuration of the control device 70 will be described later.
- FIG. 3 is a schematic view showing the configuration of the joining device 41 according to the embodiment.
- the joining device 41 includes a first holding portion 140, a second holding portion 141, and a striker 190.
- the first holding portion 140 has a main body portion 170.
- the main body 170 is supported by the support member 180.
- the support member 180 and the main body 170 are formed with through holes 176 that vertically penetrate the support member 180 and the main body 170.
- the position of the through hole 176 corresponds to the central portion of the first substrate W1 which is attracted and held by the first holding portion 140.
- the pressing pin 191 of the striker 190 is inserted into the through hole 176.
- the striker 190 is arranged on the upper surface of the support member 180, and includes a pressing pin 191, an actuator portion 192, and a linear motion mechanism 193.
- the pressing pin 191 is a columnar member extending along the vertical direction, and is supported by the actuator portion 192.
- the actuator unit 192 generates a constant pressure in a certain direction (here, vertically downward) by, for example, air supplied from an electropneumatic regulator (not shown).
- the actuator unit 192 can control the pressing load applied to the central portion of the first substrate W1 in contact with the central portion of the first substrate W1 by the air supplied from the electropneumatic regulator. Further, the tip portion of the actuator portion 192 is vertically movable up and down through the through hole 176 by the air from the electropneumatic regulator.
- the actuator unit 192 is supported by the linear motion mechanism 193.
- the linear motion mechanism 193 moves the actuator unit 192 along the vertical direction by, for example, a drive unit having a built-in motor.
- the striker 190 controls the movement of the actuator unit 192 by the linear motion mechanism 193, and controls the pressing load of the first substrate W1 by the pressing pin 191 by the actuator unit 192. As a result, the striker 190 presses the central portion of the first substrate W1 that is attracted and held by the first holding portion 140 to bring it into contact with the second substrate W2.
- a plurality of pins 171 that come into contact with the upper surface (non-joining surface W1n) of the first substrate W1 are provided on the lower surface of the main body 170.
- the plurality of pins 171 have, for example, a diameter dimension of 0.1 mm to 1 mm and a height of several tens of ⁇ m to several hundreds of ⁇ m.
- the plurality of pins 171 are evenly arranged at intervals of, for example, 2 mm.
- the first holding portion 140 includes a plurality of suction portions for sucking the first substrate W1 in a part of the regions where the plurality of pins 171 are provided. Specifically, on the lower surface of the main body 170 of the first holding portion 140, a plurality of outer suction portions 301 and a plurality of inner suction portions 302 for evacuating and sucking the first substrate W1 are provided. The plurality of outer suction portions 301 and the plurality of inner suction portions 302 have arc-shaped suction regions in a plan view. The plurality of outer suction portions 301 and the plurality of inner suction portions 302 have the same height as the pin 171.
- the plurality of outer suction portions 301 are arranged on the outer peripheral portion of the main body portion 170.
- the plurality of outer suction portions 301 are connected to a suction device (not shown) such as a vacuum pump, and suck the outer peripheral portion of the first substrate W1 by vacuuming.
- the plurality of inner suction portions 302 are arranged side by side along the circumferential direction in the radial direction of the main body portion 170 with respect to the plurality of outer suction portions 301.
- the plurality of inner suction portions 302 are connected to a suction device (not shown) such as a vacuum pump, and suck the region between the outer peripheral portion and the central portion of the first substrate W1 by vacuuming.
- the second holding unit 141 will be described.
- the second holding portion 141 has a main body portion 200 having the same diameter as the second substrate W2 or a diameter larger than that of the second substrate W2.
- the second holding portion 141 having a diameter larger than that of the second substrate W2 is shown.
- the upper surface of the main body 200 is a facing surface facing the lower surface (non-joining surface W2n) of the second substrate W2.
- a plurality of pins 201 that come into contact with the lower surface (non-joining surface Wn2) of the second substrate W2 are provided.
- the plurality of pins 201 have, for example, a diameter dimension of 0.1 mm to 1 mm and a height of several tens of ⁇ m to several hundreds of ⁇ m.
- the plurality of pins 201 are evenly arranged at intervals of, for example, 2 mm.
- a lower rib 202 is provided in an annular shape on the outside of the plurality of pins 201.
- the lower rib 202 is formed in an annular shape and supports the outer peripheral portion of the second substrate W2 over the entire circumference.
- the main body 200 has a plurality of lower suction ports 203.
- a plurality of lower suction ports 203 are provided in a suction region surrounded by the lower ribs 202.
- the plurality of lower suction ports 203 are connected to a suction device (not shown) such as a vacuum pump via a suction pipe (not shown).
- the second holding portion 141 decompresses the suction region by evacuating the suction region surrounded by the lower rib 202 from the plurality of lower suction ports 203. As a result, the second substrate W2 placed on the suction region is sucked and held by the second holding portion 141.
- the second substrate W2 Since the lower rib 202 supports the outer peripheral portion of the lower surface of the second substrate W2 over the entire circumference, the second substrate W2 is appropriately evacuated to the outer peripheral portion. As a result, the entire surface of the second substrate W2 can be adsorbed and held. Further, since the lower surface of the second substrate W2 is supported by the plurality of pins 201, the second substrate W2 is easily peeled off from the second holding portion 141 when the evacuation of the second substrate W2 is released.
- the joining device 41 is provided with a transition, a reversing mechanism, a position adjusting mechanism, and the like in front of the first holding portion 140, the second holding portion 141, and the like shown in FIG.
- the transition temporarily places the first substrate W1, the second substrate W2, and the polymerization substrate T.
- the position adjusting mechanism adjusts the horizontal orientation of the first substrate W1 and the second substrate W2.
- the reversing mechanism reverses the front and back of the first substrate W1.
- FIG. 4 is a schematic view showing the configuration of the inspection device according to the embodiment.
- FIG. 5 is a schematic view showing a configuration of a holding unit of the inspection device according to the embodiment. Note that FIG. 4 is a schematic view of the inspection device viewed from the side, and FIG. 5 is a schematic view of the holding portion of the inspection device viewed from above.
- the inspection device 80 includes a holding unit 400, an imaging unit 500, and an illumination unit 600.
- the holding portion 400 holds the polymerization substrate T horizontally.
- the holding portion 400 includes a main body portion 410 and a plurality of support members 420.
- the main body 410 is a flat plate-shaped member having an opening 411 having a diameter larger than that of the polymerization substrate T.
- the main body 410 is connected to the moving mechanism 440, and the moving mechanism 440 enables movement in the horizontal direction (X-axis direction and Y-axis direction) and rotation about the vertical axis.
- the plurality of support members 420 are provided in the main body 410 so as to extend toward the center of the opening 411.
- the outer peripheral portion of the polymerization substrate T is supported by the tip portions of a plurality of support members 420.
- the tips of the plurality of support members 420 are connected to a suction device 480 such as a vacuum pump via a suction pipe 460, and the outer peripheral portion of the lower surface of the polymerization substrate T is sucked by vacuuming.
- the imaging unit 500 is arranged above the holding unit 400.
- the image pickup unit 500 includes a camera lens 501 and an image pickup element 502 such as a CCD image sensor or a CMOS image sensor.
- the image pickup unit 500 is connected to the elevating mechanism 510, and the distance from the upper surface of the polymerization substrate T (that is, the upper surface of the first substrate W1) can be adjusted by elevating and descending by the elevating mechanism 510.
- the lighting unit 600 is arranged below the holding unit 400. Specifically, the illumination unit 600 is arranged at a position facing the imaging unit 500 with the polymerization substrate T held by the holding unit 400 interposed therebetween.
- the illumination unit 600 irradiates light vertically upward from below the polymerization substrate T held by the holding unit 400. For example, the illumination unit 600 irradiates near-infrared light of 1000 to 1200 nm.
- the illumination unit 600 is connected to the elevating mechanism 610, and the distance from the lower surface of the polymerization substrate T (that is, the lower surface of the second substrate W2) can be adjusted by elevating and descending by the elevating mechanism 610.
- the inspection device 80 may include a plurality of imaging units having different magnifications.
- the inspection device 80 may include an imaging unit for macro imaging and an imaging unit for micro imaging.
- the inspection device 80 may be provided with illumination units at a position facing the imaging unit for macro imaging and a position facing the imaging unit for micro imaging, respectively.
- the inspection device 80 is configured as described above, and images measurement marks formed on the first substrate W1 and the second substrate W2, respectively.
- FIG. 6 is a diagram showing an example of a method of imaging a measurement mark.
- FIG. 7 is a diagram showing an example of the measurement mark.
- the inspection device 80 irradiates light vertically upward from the illumination unit 600.
- the light emitted from the illumination unit 600 reaches the image sensor 502 of the image pickup unit 500 via the second substrate W2 and the first substrate W1. That is, the imaging unit 500 images the polymerization substrate T with the transmitted light transmitted through the polymerization substrate T.
- measurement marks M1 and M2 are formed on the first substrate W1 and the second substrate W2, respectively, and the imaging unit 500 images the measurement marks M1 and M2.
- the image data captured by the image capturing unit 500 is output to the control device 70.
- the image data includes an image of the measurement mark M1 formed on the first substrate W1 and the measurement mark M2 formed on the second substrate W2.
- the control device 70 acquires measurement results such as the coordinates of the center of gravity points P1 and P2 of the measurement marks M1 and M2 and the amount of deviation of the center of gravity points P1 and P2 by analyzing the image data, and based on the acquired measurement results.
- the bonding state of the polymerization substrate T is inspected.
- FIG. 8 is a block diagram showing the configuration of the control device 70 according to the embodiment. Note that FIG. 8 shows a configuration related to the inspection device 80 among the configurations included in the control device 70.
- the control device 70 includes a control unit 71 and a storage unit 72.
- the control unit 71 includes a measurement control unit 71a, a reference generation unit 71b, a comparison unit 71c, a determination unit 71d, and a remeasurement control unit 71e.
- the storage unit 72 stores the inspection result information 72a and the reference information 72b.
- the control device 70 includes, for example, a computer having a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an HDD (Hard Disk Drive), an input / output port, and various circuits. ..
- a computer having a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an HDD (Hard Disk Drive), an input / output port, and various circuits. ..
- the CPU of the computer functions as a measurement control unit 71a, a reference generation unit 71b, a comparison unit 71c, a determination unit 71d, and a remeasurement control unit 71e of the control unit 71 by reading and executing a program stored in the ROM, for example.
- a measurement control unit 71a is ASIC (Application Specific Integrated Circuit), GPU (Graphics Processing Unit), and It may be configured by hardware such as FPGA (Field Programmable Gate Array).
- the storage unit 72 corresponds to, for example, a RAM or an HDD.
- the RAM or HDD can store the inspection result information 72a and the reference information 72b.
- the control device 70 may acquire the above-mentioned program and various information via another computer or a portable recording medium connected by a wired or wireless network.
- the measurement control unit 71a sets the measurement points of the first number of measurement points on the polymerization substrate T, and causes the inspection device 80 to measure the polymerization substrate T at each measurement point.
- FIG. 9 is a diagram showing an example of measurement points set in the measurement process.
- the measurement control unit 71a sets four measurement points R on the outer peripheral portion of the polymerization substrate T and one measurement point R at the central portion on the polymerization substrate T, for a total of five points. That is, in the present embodiment, the number of first measurement points is five.
- the four measurement points R set on the outer peripheral portion are arranged at equal intervals, that is, at 90 degree intervals.
- the five measurement points R including the measurement point R set in the central portion are set to be rotationally symmetric (here, four-fold symmetric) with respect to the polymerization substrate T.
- the measurement control unit 71a acquires image data as a measurement result from the inspection device 80. Then, the measurement control unit 71a derives an inspection result including the amount of deviation between the first substrate W1 and the second substrate W2 in the polymerization substrate T based on the acquired image data. Specifically, the measurement control unit 71a analyzes the image data to obtain the X coordinate (x1) and Y coordinate (y1) of the measurement mark M1 and the X coordinate (x2) of the measurement mark M2 at each measurement point R. And the Y coordinate (y2) is calculated.
- the measurement control unit 71a calculates the amount of deviation ( ⁇ x) of the X coordinate of the measurement marks M1 and M2 and the amount of deviation ( ⁇ y) of the Y coordinate of the measurement marks M1 and M2. Then, the measurement control unit 71a substitutes the calculation results (x1, y1, x2, y2, ⁇ x, ⁇ y) for the first number of measurement points (here, five points) into the calculation model prepared in advance.
- the amount of deviation of the first substrate W1 with respect to the second substrate W2 is set to the deviation in the X-axis direction (X shift), the deviation in the Y-axis direction (Y shift), and the rotation direction about the vertical axis. It decomposes into each component of shift (rotate) and shift (scaling) due to expansion and contraction.
- the measurement control unit 71a acquires the inspection result for each of the above components by using this calculation model, and stores the acquired inspection result in the storage unit 72 as the inspection result information 72a.
- the reference generation unit 71b generates reference information 72b.
- the reference information 72b is information including a reference value for each component of the deviation between the first substrate W1 and the second substrate W2.
- the reference generation unit 71b is based on the inspection result of the inspected polymerization substrate T (hereinafter referred to as the inspected substrate T), and the polymerization substrate T to be inspected this time (hereinafter referred to as the inspection target substrate T). ) Is generated.
- FIG. 10 is a diagram for explaining an example of reference information 72b.
- the cassettes C4a and C4b have, for example, 25 slots S1a to S25a and S1b to S25b, and the polymerization substrate T can be accommodated in each of the slots S1a to S25a and S1b to S25b.
- the polymerization substrates T1a to T25a are housed in the slots S1a to S25a, respectively.
- a plurality of (25 sheets in this case) polymerized substrates T housed in the cassette C4 are regarded as one lot, and a series of processes including a joining process by the joining device 41 and an inspection process by the inspection device 80 are performed in lot units. Do it with.
- the polymerization substrate T (that is, the inspected substrate T) that has completed a series of treatments is accommodated in order from the uppermost slot in the cassette C4.
- the first processed polymerization substrate T1a is housed in the uppermost slot S1a of the cassette C4a
- the next processed polymerization substrate T2a is the slot S1a. It is housed in the slot S2a located one below.
- the reference generation unit 71b generates reference information 72b for the inspection target substrate based on the inspection results for one or more inspected substrates having the same lot as the inspection target substrate T. That is, for example, the polymerization substrate T4b to be accommodated in the slot S4b of the cassette C4b is used as the inspection target substrate. In this case, the reference generation unit 71b generates reference information 72b for the inspection target substrate T4b based on the inspection result of at least one of the inspected substrates T1b to T3b accommodated in the slots S1b to S3b of the same cassette C4b.
- the reference generation unit 71b generates the inspection result of the first processed inspected polymerized substrate T1b among the plurality of inspected substrates T1b to T3b having the same lot as the reference information 72b for the inspection target substrate T4b. You may. In this case, since the reference information 72b can be shared for a plurality of polymerization substrates T other than the first-processed polymerization substrate T1b belonging to one lot, the processing load of the reference generation unit can be suppressed.
- the reference generation unit 71b may generate reference information 72b for the polymerization substrate T1b based on the inspection result of the lot processed immediately before the lot to which the polymerization substrate T1b belongs, for example.
- the reference generation unit 71b may generate the inspection result of the first processed inspected substrate T1a among the plurality of inspected substrates T1a to T25a accommodated in the cassette C4a as the reference information 72b.
- the average value of the inspection results of the plurality of inspected substrates T1a to T25a accommodated in the cassette C4a may be generated as the reference information 72b of the polymerization substrate T1b.
- the reference generation unit 71b generates the average value of the inspection results for two or more inspected substrates T among the plurality of inspected substrates T having the same lot as the reference information 72b for the inspection target substrate T. May be good.
- the reference generation unit 71b may generate the average value of the inspection results of all the inspected polymerized substrates T1b to T3b in the same lot as the reference information 72b for the inspection target substrate T4b. Further, the reference generation unit 71b inspects the average value of the inspection results of two or more inspected substrates T (for example, inspected substrates T2b, T3b) including the inspected substrate T3b processed immediately before the inspection target substrate T4b. It may be generated as the reference information 72b of the substrate T4b. As described above, by using the average value of the inspection results of the plurality of polymerization substrates T belonging to the same lot as the reference information 72b, the reliability of the reference information 72b can be improved.
- the reference generation unit 71b may generate reference information 72b based on the inspection results of the inspected substrates T belonging to different lots, not limited to the same lot. For example, the reference generation unit 71b inspects the inspection result of the inspected substrate T whose lot is different from the lot of the inspection target substrate T and whose processing order in lot units is the same as that of the inspection target substrate T. It may be generated as reference information 72b of the target substrate T. That is, even if the reference generation unit 71b generates the inspection result of the inspected substrate T4a accommodated in the slot S4a of the cassette C4a different from the cassette C4b in which the inspection target substrate T4b is accommodated as the reference information 72b of the inspection target substrate T4b. Good.
- the polymerization substrates T housed in the same slot of different cassettes C4 will be processed by following the same route in the bonding system 1. That is, if a plurality of joining devices 41 and inspection devices 80 are provided in the joining system 1, the polymerization substrates T housed in the same slot of different cassettes C4 are conveyed to the same joining device 41 and inspection device 80. It is likely to be done. Therefore, the reliability of the reference information 72b can be improved by using the inspection result of the polymerization substrate T housed in the same slot as the reference information 72b.
- the reference generation unit 71b has reference information 72b about the inspection target substrate T based on the inspection result of the inspected substrate T that has been inspected before the inspection target substrate T to be inspected this time. To generate.
- the comparison unit 71c compares the test result information 72a stored in the storage unit 72 with the reference information 72b. Specifically, the comparison unit 71c determines the difference from the reference value for each component (X shift, Y shift, rotate, scaling) of the deviation amount of the first substrate W1 with respect to the second substrate W2 included in the inspection result. calculate.
- the determination unit 71d remeasures the inspection target substrate T or determines whether the inspection target substrate T has a poor joint based on the comparison result by the comparison unit 71c. This point will be described with reference to FIG. FIG. 11 is a diagram showing an example of determination processing by the determination unit 71d. Note that FIG. 11 shows a graph in which the processing order in one lot is on the horizontal axis and the comparison result by the comparison unit 71c, that is, the difference between the inspection result and the reference value is on the vertical axis. Further, here, as an example, the comparison result for the component of the X shift is shown.
- the determination unit 71d determines the poor bonding between the first substrate W1 and the second substrate W2.
- control unit 71 generates bonding failure information in which the information indicating that the m-th polymerized substrate T is poorly bonded is associated with the identification number of the m-th polymerized substrate T and is stored in the storage unit 72. You may remember. Further, the control unit 71 may transmit the generated connection failure information to the external device via the network.
- the difference between the X-shift inspection result and the reference value on the nth polymerized substrate T exceeds the second threshold value, here, the range of -30 nm or more and + 30 nm or less, and at the first threshold value. It is assumed that the range does not exceed a certain range of -50 nm or more and + 50 nm or less. In this case, the determination unit 71d determines whether to remeasure the inspection target substrate T.
- the remeasurement control unit 71e causes the inspection device 80 to remeasure the inspection target substrate T according to the determination result of the determination unit 71d. Specifically, the remeasurement control unit 71e has a second measurement point number that is larger than the first measurement point number set in the measurement process by the measurement control unit 71a. Have them perform a remeasurement.
- FIG. 12 is a diagram showing an example of measurement points set in the remeasurement process.
- the remeasurement control unit 71e sets a total of nine measurement points R on the polymerization substrate T, eight points on the outer peripheral portion and one point on the central portion of the polymerization substrate T. That is, in the present embodiment, the second measurement point is 9 points.
- the measurement marks M1 and M2 are imaged at each measurement point R as in the measurement process.
- the remeasurement control unit 71e has the X coordinate (x1) and Y coordinate (y1) of the measurement mark M1 and the X coordinate (x2) and Y coordinate (y2) of the measurement mark M2 based on the image data obtained by the remeasurement process. Is calculated. Further, the remeasurement control unit 71e calculates the amount of deviation ( ⁇ x) of the X coordinate of the measurement marks M1 and M2 and the amount of deviation ( ⁇ y) of the Y coordinate of the measurement marks M1 and M2.
- the remeasurement control unit 71e substitutes the calculation results (x1, y1, x2, y2, ⁇ x, ⁇ y) for the second number of measurement points (here, 9 points) into the calculation model prepared in advance. ..
- the remeasurement control unit 71e acquires the inspection result for each component of the deviation amount of the first substrate W1 with respect to the second substrate W2, and stores the acquired inspection result in the storage unit 72 as the inspection result information 72a.
- the imaging of the measurement marks M1 and M2 by the inspection device 80 is performed using the transmitted light transmitted through the polymerization substrate T, but since it is difficult to obtain a sufficient amount of light with the transmitted light, the imaging unit 500 The exposure time tends to be set longer. Therefore, as the number of measurement points increases, the time required for the measurement process for one polymerized substrate T becomes longer, which may lead to a decrease in throughput. On the other hand, it is conceivable to suppress the decrease in throughput by reducing the number of measurement points, but the smaller the number of measurement points, the lower the accuracy of the measurement process.
- the number of measurement points is increased as compared with the measurement process when the inspection result based on the measurement process deviates from the reference information 72b while performing the measurement process with a relatively small number of measurement points. It was decided to remeasure. As a result, the throughput can be improved while ensuring the measurement accuracy of the inspection device 80.
- FIG. 13 is a flowchart showing an example of the procedure of the process executed by the bonding system 1 until the polymerization substrate T is formed by the bonding device 41.
- the various processes shown in FIG. 13 are executed based on the control by the control device 70.
- a cassette C1 containing a plurality of first substrates W1, a cassette C2 accommodating a plurality of second substrates W2, and an empty cassette C3 are placed on a predetermined mounting plate 11 of the loading / unloading station 2.
- the first substrate W1 in the cassette C1 is taken out by the transfer device 22, and is transferred to the transition device arranged in the third processing block G3.
- the first substrate W1 is conveyed to the surface modification device 30 of the first processing block G1 by the transfer device 61.
- oxygen gas which is a processing gas
- the oxygen ions are irradiated to the joint surface of the first substrate W1, and the joint surface is subjected to plasma treatment.
- the joint surface of the first substrate W1 is modified (step S101).
- the first substrate W1 is conveyed to the surface hydrophilic device 40 of the first processing block G1 by the transfer device 61.
- the surface hydrophilization device 40 pure water is supplied onto the first substrate W1 while rotating the first substrate W1 held by the spin chuck.
- the joint surface of the first substrate W1 is made hydrophilic.
- the joint surface of the first substrate W1 is cleaned with the pure water (step S102).
- the first substrate W1 is conveyed to the joining device 41 of the second processing block G2 by the conveying device 61.
- the first substrate W1 carried into the joining device 41 is conveyed to the position adjusting mechanism via the transition, and the horizontal orientation is adjusted by the position adjusting mechanism (step S103).
- the first substrate W1 is handed over from the position adjusting mechanism to the reversing mechanism, and the front and back surfaces of the first substrate W1 are inverted by the reversing mechanism (step S104). Specifically, the joint surface W1j of the first substrate W1 is directed downward.
- the first substrate W1 is delivered from the reversing mechanism to the first holding unit 101.
- the first substrate W1 is suction-held by the first holding portion 101 with the notch portion oriented in a predetermined direction (step S105).
- the processing of the second substrate W2 is performed in duplicate with the processing of steps S101 to S105 for the first substrate W1.
- the second substrate W2 in the cassette C2 is taken out by the transfer device 22, and is transferred to the transition device arranged in the third processing block G3.
- the second substrate W2 is conveyed to the surface modification device 30 by the transfer device 61, and the joint surface W2j of the second substrate W2 is modified (step S106).
- the second substrate W2 is conveyed to the surface hydrophilization device 40 by the transfer device 61, the joint surface W2j of the second substrate W2 is hydrophilized, and the joint surface is washed (step S107).
- the second substrate W2 is conveyed to the joining device 41 by the conveying device 61.
- the second substrate W2 carried into the joining device 41 is conveyed to the position adjusting mechanism via the transition.
- the horizontal orientation of the second substrate W2 is adjusted by the position adjusting mechanism (step S108).
- the second substrate W2 is conveyed to the second holding portion 141, and is attracted and held by the second holding portion 141 with the notch portion oriented in a predetermined direction (step S109).
- step S110 the horizontal position adjustment between the first substrate W1 held by the first holding portion 140 and the second substrate W2 held by the second holding portion 141 is performed.
- step S111 the vertical positions of the first substrate W1 held by the first holding portion 140 and the second substrate W2 held by the second holding portion 141 are adjusted (step S111). Specifically, the first moving portion 160 moves the second holding portion 141 vertically upward to bring the second substrate W2 closer to the first substrate W1.
- step S212 After releasing the suction holding of the first substrate W1 by the plurality of inner suction portions 302 (step S212), the central portion of the first substrate W1 is pressed by lowering the pressing pin 191 of the striker 190 (step). S113).
- the bonding surface W1j of the first substrate W1 and the bonding surface W2j of the second substrate W2 are hydrophilized in steps S102 and S110, respectively, the hydrophilic groups between the bonding surfaces W1j and W2j are hydrogen-bonded, and the bonding surface W1j , W2j are firmly joined to each other. In this way, the junction region is formed.
- a bonding wave is generated in which the bonding region expands from the central portion of the first substrate W1 and the second substrate W2 toward the outer peripheral portion.
- the suction holding of the first substrate W1 by the plurality of outer suction portions 301 is released (step S114).
- the outer peripheral portion of the first substrate W1 that has been sucked and held by the outer suction portion 301 falls.
- the bonding surface W1j of the first substrate W1 and the bonding surface W2j of the second substrate W2 are in contact with each other on the entire surface, and the polymerization substrate T is formed.
- the pressing pin 191 is raised to the first holding portion 140 to release the suction holding of the second substrate W2 by the second holding portion 141.
- the polymerization substrate T is carried out from the joining device 41 by the transport device 61. In this way, a series of joining processes is completed.
- FIG. 14 is a flowchart showing an example of the processing procedure of the inspection process.
- the inspection target substrate T is carried in (step S201). Specifically, the transport device 61 (see FIG. 1) transports the inspection target substrate T inside the holding unit 400, and the inspection device 80 receives the inspection target substrate T from the transport device 61 using a lifter (not shown). .. Subsequently, the lifter of the inspection device 80 moves, so that the inspection target substrate T is placed on the plurality of support members 420. Then, the suction device 480 evacuates the inspection target substrate T through the suction pipe 460, so that the inspection target substrate T is sucked and held by the holding portion 400.
- the inspection device 80 performs a ⁇ alignment process (step S202).
- the ⁇ alignment process is a process of adjusting the position of the substrate T to be inspected in the rotation direction. Specifically, the inspection device 80 captures a plurality of reference points (for example, a reference point located at the center of the inspection target substrate T and a reference point located next to the reference point) existing on the inspection target substrate T as an imaging unit 500. Image is taken by. Then, the inspection device 80 calculates the rotation angle of the inspection target substrate T from the obtained image, and rotates the inspection target substrate T using the moving mechanism 440 so that the rotation angle becomes 0 degrees.
- the reference point is formed on the first substrate W1 or the second substrate W2 together with the pattern for each shot when the pattern is formed on the first substrate W1 or the second substrate W2 by the exposure process, for example. It is a thing. That is, the inspection device 80 rotates the inspection target substrate T so that the pattern arrangement direction for each inspection target substrate T1 shot is always the same direction.
- the inspection device 80 performs the measurement process (step S203). Specifically, the inspection device 80 positions the image pickup unit 500 and the illumination unit 600 on the vertical line of the first measurement point R by horizontally moving the holding unit 400 using the moving mechanism 440. After that, the inspection device 80 focuses the image pickup unit 500, corrects the position of the holding section 400, and then uses the image pickup section 500 and the illumination section 600 to perform the measurement mark M1 located at the first measurement point R. , M2 is imaged.
- the inspection device 80 performs the same processing on the remaining measurement points R. That is, the inspection device 80 repeats the above-described processing for the number of first measurement points (here, for 5 points). Then, the control unit 71 determines each component of the deviation amount of the first substrate W1 with respect to the second substrate W2, that is, X shift, based on the measurement results of the obtained first measurement points (here, five points). , Y shift, rotate, and scaling.
- the control unit 71 determines the comparison result, that is, the difference (absolute value) between each component of the deviation amount of the first substrate W1 with respect to the second substrate W2 and the reference value of each of the above components included in the reference information 72b. It is determined whether or not the first threshold value (absolute value) has been exceeded (step S204). When the comparison result (absolute value) exceeds the first threshold value (absolute value) for any one of the above components, the control unit 71 sets the comparison result (absolute value) to the first threshold value (absolute value). ) Is exceeded. When it is determined that the comparison result (absolute value) exceeds the first threshold value (absolute value) (step S204, Yes), the control unit 71 determines that the bonding state of the inspection target substrate T is poor (step). S205).
- step S204 when the comparison result (absolute value) does not exceed the first threshold value (absolute value) (step S204, No), the control unit 71 has the comparison result (absolute value) of the second threshold value (absolute value). It is determined whether or not the absolute value) has been exceeded (step S206). In this process, when it is determined that the comparison result (absolute value) exceeds the second threshold value (absolute value) (step S206, Yes), the control unit 71 remeasures the inspection target substrate T with respect to the inspection device 80. Let the process be performed.
- the remeasurement process is performed at a second measurement point number (here, 9 points) which is larger than the first measurement point number which is the measurement point number in the measurement process in step S203. Therefore, the accuracy of the measurement process can be improved as compared with the measurement process. In other words, it is possible to obtain a test result closer to the true value as compared with the measurement process.
- step S206 when the comparison result (absolute value) does not exceed the second threshold value (absolute value) (steps S206, No), the control unit 71 determines that the bonding state of the inspection target substrate T is normal. (Step S208).
- the inspection device 80 carries out the inspection processing of the substrate T to be inspected (step S209).
- the carry-out process is performed in the reverse procedure of the carry-in process in step S201.
- control unit 71 may shift the process to step S204 after completing the remeasurement process in step S207. In this case, if it is determined again in step S206 that the comparison result (absolute value) exceeds the second threshold value (absolute value), the control unit 71 may perform re-measurement with the number of measurement points further increased.
- FIG. 15 is a diagram showing a first modification of the measurement point set in the measurement process.
- FIG. 16 is a diagram showing a second modification of the measurement point set in the measurement process.
- the measurement point R of the first number of measurement points in the measurement process may be set only on the outer peripheral portion of the inspection target substrate T, for example. Since the bonding region of the bonding wave expands from the central portion of the first substrate W1 and the second substrate W2 toward the outer peripheral portion, the deviation between the first substrate W1 and the second substrate W2 is caused by the substrate T to be inspected.
- the outer peripheral part is larger than the central part. Therefore, by setting the measurement point R on the outer peripheral portion of the inspection target substrate T, the first substrate W1 and the second substrate W2 are compared with the case where the measurement point R is set on the central portion of the inspection target substrate T. The deviation can be grasped appropriately.
- the first substrate W1 and the second substrate W2 constituting the inspection target substrate T are single crystal silicon wafers in which the crystal direction in the direction perpendicular to the surface is [100].
- the notch portion N of the first substrate W1 and the second substrate W2 is formed at the outer edge of the first substrate W1 and the second substrate W2 in the [011] crystal direction.
- the fact that the Miller index is negative is usually expressed by adding a "-" (bar) above the number, but in the present specification, it is expressed by adding a negative sign in front of the number.
- the joining region expands concentrically.
- the first substrate W1 and the second substrate W2 which are single crystal silicon wafers, have different physical properties such as Young's modulus and Poisson's ratio in the 90 degree direction and the 45 degree direction, they are distorted in the 90 degree direction and the 45 degree direction. There will be a difference in the degree of.
- the 90-degree direction is a direction having a 90-degree cycle with reference to a direction from the center of the first substrate W1 toward the [0-11] crystal direction parallel to the surface of the first substrate W1 (FIG. 15).
- the 45-degree direction is a direction having a 90-degree period (45 degrees shown in FIG. 15 and the like) with reference to a direction from the center of the first substrate W1 toward the [010] crystal direction parallel to the surface of the first substrate W1. , 135 degrees, 225 degrees, 315 degrees).
- the values of Young's modulus, Poisson's ratio, and shear modulus of a single crystal silicon wafer change in a 90-degree cycle. Specifically, the Young's modulus of a single crystal silicon wafer is highest in the 90 degree direction and lowest in the 45 degree direction. The Poisson's ratio and shear modulus are highest in the 45 degree direction and lowest in the 90 degree direction.
- the way of stretching and shrinking of the first substrate W1 and the second substrate W2 when the joining process is performed differs between the 45-degree direction and the 90-degree direction. That is, the amount of deviation between the first substrate W1 and the second substrate W2 on the substrate T to be inspected differs between the 45-degree direction and the 90-degree direction.
- the measurement control unit 71a sets four measurement points R in the 45-degree direction (45-degree, 135-degree, 225-degree, and 315-degree directions) and 90-degree direction (0-degree). , 90 degrees, 180 degrees, 270 degrees), and four measurement points R may be set. As a result, the deviation between the first substrate W1 and the second substrate W2 can be appropriately captured.
- the measurement points R are set in all of the 45-degree direction (45-degree, 135-degree, 225-degree, 315-degree direction) and the 90-degree direction (0-degree, 90-degree, 180-degree, 270-degree direction).
- the measurement control unit 71a has at least one in the 45-degree direction (45-degree, 135-degree, 225-degree, 315-degree direction) and 90-degree direction (0-degree, 90-degree, 180-degree, 270-degree).
- the measurement point R may be set at least one of the directions).
- the measurement control unit 71a may set the measurement point R in a direction intermediate between the 45-degree direction and the 90-degree direction.
- the total of four locations is between 0 and 45 degrees, between 90 and 135 degrees, between 180 and 225 degrees, and between 270 and 315 degrees.
- Four measurement points R are set. By doing so, it is possible to keep the number of first measurement points small while maintaining rotational symmetry, and to appropriately capture the deviation between the first substrate W1 and the second substrate W2.
- FIG. 17 is a diagram showing a modified example of the measurement point set in the remeasurement process.
- the remeasurement control unit 71e further sets the measurement point R between the measurement point R set in the central portion of the inspection target substrate T and the measurement point R set in the outer peripheral portion. You may. In the example shown in FIG. 17, between the measurement point R located on the outer peripheral portion in the 0 degree direction and the measurement point R located in the central portion, the measurement point R located on the outer peripheral portion and the central portion in the 90 degree direction are located. A measurement point R is further set between the measurement point R and the measurement point R. Further, between the measurement point R located at the outer peripheral portion in the 180 degree direction and the measurement point R located at the central portion, the measurement point R located at the outer peripheral portion and the measurement point R located at the central portion in the 270 degree direction. The measurement point R is further set in the meantime. That is, in the example shown in FIG. 17, a total of 13 measurement points are set.
- the joining system (as an example, the joining system 1) according to the embodiment includes a joining device (as an example, a joining device 41), an inspection device (as an example, an inspection device 80), and a control unit (an example).
- a control device 70 As a control device 70).
- the joining device forms a polymerized substrate (as an example, a polymerized substrate T) by joining a first substrate (for example, a first substrate W1) and a second substrate (for example, a second substrate W2).
- the inspection device inspects the polymerized substrate.
- the control unit controls the inspection device.
- control unit includes a measurement control unit (as an example, the measurement control unit 71a), a comparison unit (as an example, the comparison unit 71c), and a remeasurement control unit (as an example, the remeasurement control unit 71e).
- the measurement control unit causes the inspection device to measure the polymerized substrate at the first number of measurement points (5 points as an example).
- the comparison unit compares the inspection result (inspection result information 72a as an example) including the amount of deviation between the first substrate and the second substrate in the polymerized substrate derived from the measurement result with the reference (reference information 72b as an example). To do.
- the remeasurement control unit causes the inspection device to remeasure the polymerized substrate with a second measurement point (9 points as an example), which is larger than the first measurement point, based on the comparison result by the comparison unit.
- the joining system according to the embodiment it is possible to improve the throughput while ensuring the measurement accuracy of the inspection device.
- the control unit determines the bonding failure between the first substrate and the second substrate when the difference between the inspection result and the reference exceeds the first threshold value (for example, the range of -50 nm or more and +50 nm or less).
- the first threshold value for example, the range of -50 nm or more and +50 nm or less.
- the remeasurement control unit sets the first threshold value when the difference between the inspection result and the reference exceeds the second threshold value (for example, the range of -30 nm or more and +30 nm or less) which is smaller than the first threshold value. If it does not exceed the limit, the inspection device may be made to remeasure the polymerized substrate.
- the difference between the test result and the reference exceeds the second range and does not exceed the first range, it is considered that the accuracy of the measurement performed at the first measurement point is insufficient. Be done. Therefore, when the difference between the inspection result and the reference exceeds the second range and does not exceed the first range, the measurement accuracy can be improved by performing the remeasurement.
- the difference between the inspection result and the reference exceeds the first range, in other words, if the difference between the inspection result and the reference is so large that it exceeds the range of measurement error by the inspection device, until remeasurement is performed. Therefore, it can be determined that the joint is defective.
- the control unit may further include a reference generation unit (as an example, a reference generation unit 71b).
- the reference generation unit inspects the inspected polymerization substrate (inspected substrate T as an example) that has been inspected before the inspection target polymerization substrate (inspection target substrate T as an example) to be inspected this time. Based on the results, a reference for the polymerized substrate to be inspected is generated.
- the reference generator may generate a reference for the polymerized substrate to be inspected based on the inspection results for one or more inspected polymerization boards having the same lot as the polymerized substrate to be inspected. Thereby, by using the inspection results of the inspected polymerized substrates belonging to the same lot, it is possible to generate an appropriate reference for the polymerized substrate to be inspected.
- the reference generation unit may generate the inspection result of the first processed inspected polymerization substrate among a plurality of inspected polymerization substrates having the same lot as a reference for the inspection target polymerization substrate. In this case, since the reference can be shared by a plurality of polymerization substrates other than the first-treated polymerization substrate belonging to the same lot, the processing load for generating the reference can be suppressed.
- the reference generation unit may generate an average value of inspection results for two or more inspected polymerized substrates among a plurality of inspected polymerized substrates having the same lot as a reference for the polymerized substrate to be inspected. As a result, the reliability as a reference can be improved.
- the reference generator is an inspected polymerization substrate of a lot different from the lot of the inspection target polymerization substrate, and the inspection result of the inspected polymerization substrate in which the processing order for each lot is the same as that of the inspection target polymerization substrate is inspected. It may be generated as a reference for the substrate. By using the inspection results of the polymerized substrates having the same processing order as a reference, the reliability as a reference can be improved.
- the measurement control unit may set the measurement points of the first number of measurement points (as an example, the measurement point R) only on the outer peripheral portion of the polymerization substrate. Further, the remeasurement control unit may set a total of a second number of measurement points on the outer peripheral portion and the central portion of the polymerization substrate. Since the bonding region of the bonding wave expands from the central portion of the first substrate and the second substrate toward the outer peripheral portion, the deviation between the first substrate and the second substrate is larger than the central portion of the substrate to be inspected. The part is bigger.
- the deviation between the first substrate and the second substrate is appropriately compared with the case where the measurement point is set in the central portion of the polymerized substrate to be inspected. You can catch it.
- the first substrate and the second substrate may be single crystal silicon wafers whose surface crystal direction is [100].
- the measurement control unit defines 90 degrees with respect to the direction of 45 degrees.
- Measurement points may be set at least one of the four first outer peripheral portions arranged at intervals and at least one of the four second outer peripheral portions arranged at 90 degree intervals with respect to the direction of 90 degrees.
- the amount of deviation between the first substrate and the second substrate when the first substrate and the second substrate, which are single crystal silicon wafers having a surface crystal direction of [100], are joined is 45 degrees and 90 degrees. Is different. Therefore, by setting the measurement points in the 45-degree direction and the 90-degree direction, the deviation between the first substrate W1 and the second substrate W2 can be appropriately captured.
- the central portion of the first substrate is pressed by a striker to bring it into contact with the second substrate, and the intermolecular force generated between the joint surfaces of the first substrate and the second substrate whose surfaces have been modified is generated.
- a joining device for joining the first substrate and the second substrate using the above method has been described as an example. Not limited to this, the joining device may be, for example, a type of joining device in which the first substrate and the second substrate are joined via an adhesive.
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Abstract
Description
まず、実施形態に係る接合システムの構成について図1および図2を参照して説明する。図1は、実施形態に係る接合システムの構成を示す模式図である。また、図2は、実施形態に係る第1基板および第2基板の接合前の状態を示す模式図である。
次に、接合装置41の構成について図3を参照して説明する。図3は、実施形態に係る接合装置41の構成を示す模式図である。
次に、検査装置の構成について図4および図5を参照して説明する。図4は、実施形態に係る検査装置の構成を示す模式図である。また、図5は、実施形態に係る検査装置の保持部の構成を示す模式図である。なお、図4は、検査装置を側方から見た模式図であり、図5は、検査装置の保持部を上方から見た模式図である。
次に、制御装置70の構成について図8を参照して説明する。図8は、実施形態に係る制御装置70の構成を示すブロック図である。なお、図8には、制御装置70が備える構成のうち、検査装置80に関連する構成を示している。
測定制御部71aは、第1の測定点数の測定点を重合基板Tに設定し、検査装置80に対し、各測定点において重合基板Tの測定を行わせる。図9は、測定処理において設定される測定点の一例を示す図である。
リファレンス生成部71bは、リファレンス情報72bを生成する。リファレンス情報72bは、第1基板W1と第2基板W2とのずれの成分ごとのリファレンス値を含む情報である。
比較部71cは、記憶部72に記憶された検査結果情報72aとリファレンス情報72bとを比較する。具体的には、比較部71cは、検査結果に含まれる、第2基板W2に対する第1基板W1のずれ量の成分(Xシフト、Yシフト、ロテート、スケーリング)ごとに、リファレンス値との差を算出する。
判定部71dは、比較部71cによる比較結果に基づき、検査対象基板Tの再測定を行うか、または、検査対象基板Tが接合不良であるかの判定を行う。この点について図11を参照して説明する。図11は、判定部71dによる判定処理の一例を示す図である。なお、図11には、1つのロットにおける処理順番を横軸に、比較部71cによる比較結果、すなわち、検査結果とリファレンス値との差を縦軸に取ったグラフを示している。また、ここでは、一例として、Xシフトの成分についての比較結果を示している。
再測定制御部71eは、判定部71dの判定結果に従って、検査対象基板Tの再測定を検査装置80に実施させる。具体的には、再測定制御部71eは、測定制御部71aによる測定処理において設定される第1の測定点数よりも多い第2の測定点数にて、検査装置80に対して検査対象基板Tの再測定を実施させる。
次に、接合システム1の具体的な動作について説明する。まず、接合装置41によって重合基板Tが形成されるまでの処理手順について図13を参照して説明する。図13は、接合システム1が実行する処理のうち、接合装置41によって重合基板Tが形成されるまでの処理の手順の一例を示すフローチャートである。図13に示す各種の処理は、制御装置70による制御に基づいて実行される。
次に、検査対象基板Tに設定される測定点の変形例について図15~図17を参照して説明する。まず、測定処理において設定される測定点の変形例について図15および図16を参照して説明する。図15は、測定処理において設定される測定点の第1の変形例を示す図である。図16は、測定処理において設定される測定点の第2の変形例を示す図である。
W2 第2基板
T 重合基板
1 接合システム
2 搬入出ステーション
3 処理ステーション
4 検査ステーション
41 接合装置
70 制御装置
71 制御部
71a 測定制御部
71b リファレンス生成部
71c 比較部
71d 判定部
71e 再測定制御部
72 記憶部
72a 検査結果情報
72b リファレンス情報
80 検査装置
400 保持部
410 本体部
420 支持部材
460 吸引管
500 撮像部
600 照明部
Claims (10)
- 第1基板と第2基板とを接合することによって重合基板を形成する接合装置と、
前記重合基板の検査を行う検査装置と
前記検査装置を制御する制御部と
を備え、
前記制御部は、
前記検査装置に対し、第1の測定点数にて、前記重合基板の測定を行わせる測定制御部と、
前記測定の結果から導出される前記重合基板における前記第1基板と前記第2基板とのずれ量を含む検査結果をリファレンスと比較する比較部と、
前記比較部による比較結果に基づき、前記検査装置に対し、前記第1の測定点数よりも多い第2の測定点数にて前記重合基板の再測定を行わせる再測定制御部と
を備える、接合システム。 - 前記制御部は、
前記検査結果と前記リファレンスとの差が第1の閾値を超えた場合に、前記第1基板と前記第2基板との接合不良を判定する判定部
をさらに備え、
前記再測定制御部は、
前記検査結果と前記リファレンスとの差が前記第1の閾値よりも小さい第2の閾値を超えており且つ前記第1の閾値を超えていない場合に、前記検査装置に対して前記重合基板の再測定を行わせる、請求項1に記載の接合システム。 - 前記制御部は、
今回の前記検査の対象となる検査対象重合基板よりも前に前記検査が行われた検査済重合基板についての前記検査結果に基づき、前記検査対象重合基板についての前記リファレンスを生成するリファレンス生成部
をさらに備える、請求項1または2に記載の接合システム。 - 前記リファレンス生成部は、
前記検査対象重合基板とロットが同じである1または複数の前記検査済重合基板についての前記検査結果に基づき、前記検査対象重合基板についての前記リファレンスを生成する、請求項3に記載の接合システム。 - 前記リファレンス生成部は、
前記ロットが同じである複数の前記検査済重合基板のうち、最初に処理された前記検査済重合基板についての前記検査結果を前記検査対象重合基板についての前記リファレンスとして生成する、請求項4に記載の接合システム。 - 前記リファレンス生成部は、
前記ロットが同じである複数の前記検査済重合基板のうち、2以上の前記検査済重合基板についての前記検査結果の平均値を前記検査対象重合基板についての前記リファレンスとして生成する、請求項4に記載の接合システム。 - 前記リファレンス生成部は、
前記検査対象重合基板のロットと異なるロットの前記検査済重合基板であって、ロット単位での処理順番が前記検査対象重合基板と同じである前記検査済重合基板についての前記検査結果を前記検査対象重合基板についての前記リファレンスとして生成する、請求項3に記載の接合システム。 - 前記測定制御部は、
前記重合基板の外周部のみに前記第1の測定点数の測定点を設定し、
前記再測定制御部は、
前記重合基板の外周部と中心部とに合計で前記第2の測定点数の測定点を設定する、請求項1~7のいずれか一つに記載の接合システム。 - 前記第1基板および前記第2基板は、
表面の結晶方向が[100]である単結晶シリコンウェハであり、
前記測定制御部は、
前記重合基板の中心部から前記重合基板の表面に対して平行な[0-11]結晶方向に向かう方向を0度と規定したとき、45度の方向を基準に90度間隔で配置される4つの第1外周部の少なくとも1つと、90度の方向を基準に90度間隔で配置される4つの第2外周部の少なくとも1つとに測定点を設定する、請求項1~8のいずれか一つに記載の接合システム。 - 第1基板と第2基板とを接合することによって形成された重合基板を検査装置を用いて検査する重合基板の検査方法であって、
前記検査装置に対し、第1の測定点数にて、前記重合基板の測定を行わせる工程と、
前記測定の結果から導出される前記重合基板における前記第1基板と前記第2基板とのずれ量を含む検査結果をリファレンスと比較する工程と、
前記比較する工程による比較結果に基づき、前記検査装置に対し、前記第1の測定点数よりも多い第2の測定点数にて前記重合基板の再測定を行わせる工程と
を含む、重合基板の検査方法。
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WO2019087707A1 (ja) * | 2017-11-02 | 2019-05-09 | 株式会社ニコン | 積層基板の製造方法、製造装置、およびプログラム |
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JPH06112295A (ja) * | 1992-09-30 | 1994-04-22 | Matsushita Electric Ind Co Ltd | 実装基板生産システム |
JP2011066287A (ja) * | 2009-09-18 | 2011-03-31 | Bondtech Inc | 接合装置および接合方法 |
JP2015119088A (ja) * | 2013-12-19 | 2015-06-25 | 東京エレクトロン株式会社 | 接合方法、プログラム、コンピュータ記憶媒体、接合装置及び接合システム |
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