WO2019146427A1 - 接合システム、および接合方法 - Google Patents
接合システム、および接合方法 Download PDFInfo
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- WO2019146427A1 WO2019146427A1 PCT/JP2019/000637 JP2019000637W WO2019146427A1 WO 2019146427 A1 WO2019146427 A1 WO 2019146427A1 JP 2019000637 W JP2019000637 W JP 2019000637W WO 2019146427 A1 WO2019146427 A1 WO 2019146427A1
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- H—ELECTRICITY
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67092—Apparatus for mechanical treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02002—Preparing wafers
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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
- H01L21/67—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
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67103—Apparatus for thermal treatment mainly by conduction
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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
- H01L21/67—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
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67259—Position monitoring, e.g. misposition detection or presence detection
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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
- H01L21/67—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
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67288—Monitoring of warpage, curvature, damage, defects or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/68—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for positioning, orientation or alignment
- H01L21/681—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for positioning, orientation or alignment using optical controlling means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—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
- H01L21/683—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
- H01L21/6838—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 with gripping and holding devices using a vacuum; Bernoulli devices
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/80—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/24—Preliminary treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- 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
- H01L2224/80001—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 by connecting a bonding area directly to another bonding area, i.e. connectorless bonding, e.g. bumpless bonding
- H01L2224/80009—Pre-treatment of the bonding area
- H01L2224/8001—Cleaning the bonding area, e.g. oxide removal step, desmearing
- H01L2224/80011—Chemical cleaning, e.g. etching, flux
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- 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
- H01L2224/80001—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 by connecting a bonding area directly to another bonding area, i.e. connectorless bonding, e.g. bumpless bonding
- H01L2224/8012—Aligning
- H01L2224/80121—Active alignment, i.e. by apparatus steering, e.g. optical alignment using marks or sensors
- H01L2224/8013—Active alignment, i.e. by apparatus steering, e.g. optical alignment using marks or sensors using marks formed on the semiconductor or solid-state body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- 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
- H01L2224/80001—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 by connecting a bonding area directly to another bonding area, i.e. connectorless bonding, e.g. bumpless bonding
- H01L2224/808—Bonding techniques
- H01L2224/80894—Direct bonding, i.e. joining surfaces by means of intermolecular attracting interactions at their interfaces, e.g. covalent bonds, van der Waals forces
- H01L2224/80896—Direct bonding, i.e. joining surfaces by means of intermolecular attracting interactions at their interfaces, e.g. covalent bonds, van der Waals forces between electrically insulating surfaces, e.g. oxide or nitride layers
Definitions
- the present disclosure relates to a bonding system and a bonding method.
- the bonding apparatus described in Patent Document 1 includes an upper chuck that sucks the upper substrate from above and a lower chuck that sucks the lower substrate from below, and bonds the two substrates while facing each other. Specifically, the bonding apparatus first depresses the central portion of the substrate adsorbed by the upper chuck and brings it into contact with the central portion of the substrate adsorbed by the lower chuck. As a result, the central portions of the two substrates are joined by intermolecular force or the like. Next, the bonding apparatus spreads the bonded bonding area of the two substrates from the central portion to the outer peripheral portion.
- the bonding apparatus includes an upper imaging unit fixed to the upper chuck, a lower imaging unit fixed to the lower chuck, and a moving unit relatively moving the upper chuck and the lower chuck.
- the upper imaging unit images the alignment mark formed on the lower substrate attracted to the lower chuck.
- the lower imaging unit images the alignment mark formed on the upper substrate attracted to the upper chuck.
- the bonding apparatus measures the relative horizontal position between the upper substrate and the lower substrate based on the image captured by the upper imaging unit and the image captured by the lower imaging unit.
- the bonding apparatus relatively moves the upper chuck and the lower chuck such that the alignment mark of the upper substrate and the alignment mark of the lower substrate overlap when viewed from the vertical direction, and The lower substrate is bonded.
- One aspect of the present disclosure provides a technique that can improve the accuracy of horizontal alignment between an upper substrate and a lower substrate performed before bonding.
- the joining system is A first holding unit and a second holding unit are disposed vertically separated from each other, and the first holding unit has a suction surface for holding the first substrate by suction on the surface facing the second holding unit
- the second holding unit has a suction surface for holding the second substrate by suction on a surface facing the first holding unit, By relatively moving the first holding portion and the second holding portion, the first substrate held by the first holding portion and the second held by the second holding portion
- An alignment unit for performing horizontal alignment with the substrate;
- a pressing unit for pressing and combining the first substrate held by the first holding unit and the second substrate held by the second holding unit;
- a measurement unit configured to measure a positional deviation between the alignment mark of the first substrate and the alignment mark of the second substrate joined by the pressing unit;
- an alignment control unit configured to control the horizontal alignment of the current joint based on the positional deviation generated in the past joint.
- FIG. 1 is a plan view of a bonding system according to one embodiment.
- FIG. 2 is a side view of a bonding system according to one embodiment.
- FIG. 3 is a side view showing a state before bonding of the first substrate and the second substrate according to one embodiment.
- FIG. 4 is a plan view showing a bonding apparatus according to one embodiment.
- FIG. 5 is a side view showing a bonding apparatus according to an embodiment.
- FIG. 6 is a cross-sectional view showing an upper chuck and a lower chuck according to an embodiment, and showing a state before bonding after alignment of the upper wafer and the lower wafer.
- FIG. 7 is a cross-sectional view showing an operation of gradually bonding the upper wafer and the lower wafer from the central portion to the outer peripheral portion according to one embodiment.
- FIG. 8 is a flow chart showing a part of the process performed by the bonding system according to one embodiment.
- FIG. 9 is an explanatory view showing an operation of horizontal alignment between the upper wafer and the lower wafer according to one embodiment.
- FIG. 10 is a cross-sectional view showing an alignment measurement apparatus according to an embodiment.
- FIG. 11 is a diagram showing components of the control device according to an embodiment in functional blocks.
- FIG. 12 is an explanatory diagram of processing by the measurement data analysis unit according to the embodiment.
- FIG. 13 is a flowchart showing processing for obtaining settings of the bonding apparatus based on measurement data of the alignment measurement apparatus according to one embodiment.
- FIG. 14 is a flowchart showing an operation process of the bonding apparatus based on measurement data of the alignment measurement apparatus according to the embodiment.
- FIG. 15 is a plan view showing a suction surface of a lower chuck according to an embodiment.
- FIG. 16 is a side view showing an upper chuck, a lower chuck, and a temperature distribution adjustment unit according to an embodiment.
- FIG. 17 is a side cross-sectional view showing the main body of the temperature distribution adjustment unit according to one embodiment.
- FIG. 18 is a side sectional view showing a lower chuck according to a modification.
- the same or corresponding components are denoted by the same or corresponding reference numerals, and the description thereof will be omitted.
- the X-axis direction, the Y-axis direction, and the Z-axis direction are directions perpendicular to each other
- the X-axis direction and the Y-axis direction are horizontal directions
- the Z-axis direction is a vertical direction.
- the direction of rotation with the vertical axis as the center of rotation is also called the eyebrow direction.
- the lower side means the vertically lower side
- the upper side means the vertically upper side.
- FIG. 1 is a plan view of a bonding system according to one embodiment.
- FIG. 2 is a side view of a bonding system according to one embodiment.
- FIG. 3 is a side view showing a state before bonding of the first substrate and the second substrate according to one embodiment.
- the bonding system 1 shown in FIG. 1 forms a superposed substrate T (see FIG. 7B) by bonding the first substrate W1 and the second substrate W2.
- the first substrate W1 is a substrate in which a plurality of electronic circuits are formed on a semiconductor substrate such as a silicon wafer or a compound semiconductor wafer, for example.
- the second substrate W2 is, for example, a bare wafer on which no electronic circuit is formed.
- the first substrate W1 and the second substrate W2 have substantially the same diameter.
- An electronic circuit may be formed on the second substrate W2.
- the first substrate W1 may be described as “upper wafer W1”
- the second substrate W2 may be described as “lower wafer W2”
- the overlapping substrate T may be described as “overlapping wafer T”.
- bonding surface W1j among the plate surfaces of the upper wafer W1, the plate surface on the side to be bonded to the lower wafer W2 will be referred to as “bonding surface W1j”, and the opposite surface to the bonding surface W1j
- the plate surface is described as "non-bonding surface W1 n”.
- bonding surface W2j the plate surface on the side to be bonded to upper wafer W1
- non-bonding surface W2n the plate surface on the opposite side to bonding surface W2j
- the bonding system 1 includes a loading / unloading station 2 and a processing station 3.
- the loading / unloading station 2 and the processing station 3 are arranged in the order of the loading / unloading station 2 and the processing station 3 in the X-axis positive direction. Further, the loading / unloading station 2 and the processing station 3 are integrally connected.
- the loading / unloading station 2 includes a mounting table 10 and a transfer area 20.
- the mounting table 10 includes a plurality of mounting plates 11. On each mounting plate 11, cassettes C1, C2, and C3 for storing a plurality of (for example, 25) substrates in a horizontal state are mounted.
- the cassette C1 is a cassette for accommodating the upper wafer W1
- the cassette C2 is a cassette for accommodating the lower wafer W2
- the cassette C3 is a cassette for accommodating the superposed wafer T.
- the transport region 20 is disposed adjacent to the X-axis positive direction side of the mounting table 10.
- a transport path 21 extending in the Y-axis direction and a transport device 22 movable along the transport path 21 are provided.
- the transport device 22 is movable not only in the Y-axis direction but also in the X-axis direction and is pivotable about the Z-axis, and the cassettes C1 to C3 mounted on the mounting plate 11 and the processing station 3 described later
- the upper wafer W1, the lower wafer W2 and the superposed wafer T are transferred between the third processing block G3 and the fourth processing block G4.
- cassettes C1 to C3 mounted on the mounting plate 11 is not limited to that shown in the drawings.
- a cassette or the like for collecting a substrate having a defect may be placed on the placement plate 11.
- the processing station 3 is provided with a plurality of processing blocks provided with various devices, for example, four processing blocks G1, G2, G3, and G4.
- the first processing block G1 is provided on the front side (the Y-axis negative direction side in FIG. 1) of the processing station 3, and the second processing block G1 is on the back side (the Y-axis positive direction side in FIG.
- a processing block G2 is provided.
- a third processing block G3 is provided on the loading / unloading station 2 side of the processing station 3 (X-axis negative direction side in FIG. 1).
- a fourth processing block G4 is provided on the side (the X-axis positive direction side in FIG. 1) opposite to the loading / unloading station 2 of the processing station 3.
- a surface reforming apparatus 30 is disposed which reforms the bonding surfaces W1j and W2j of the upper wafer W1 and the lower wafer W2.
- the surface modification apparatus 30 breaks the bond of SiO 2 at the bonding surfaces W1j and W2j of the upper wafer W1 and the lower wafer W2 to form single bond SiO, so that the bonding surface W1j may be easily hydrophilized thereafter. , W2j.
- oxygen gas or nitrogen gas as a processing gas is excited to be plasmatized and ionized. Then, the oxygen ions or nitrogen ions are applied to the bonding surfaces W1j and W2j of the upper wafer W1 and the lower wafer W2, so that the bonding surfaces W1j and W2j are plasma-processed and reformed.
- the surface hydrophilization device 40 and the bonding device 41 are disposed in the second processing block G2.
- the surface hydrophilization device 40 hydrophilizes the bonding surfaces W1j and W2j of the upper wafer W1 and the lower wafer W2 with pure water, for example, and cleans the bonding surfaces W1j and W2j.
- pure water is supplied onto the upper wafer W1 or the lower wafer W2 while rotating the upper wafer W1 or the lower wafer W2 held by the spin chuck.
- the pure water supplied onto the upper wafer W1 or the lower wafer W2 diffuses on the bonding surfaces W1j and W2j of the upper wafer W1 or the lower wafer W2, and the bonding surfaces W1j and W2j are hydrophilized.
- the bonding device 41 bonds the hydrophilized upper wafer W1 and lower wafer W2 by an intermolecular force.
- the configuration of the bonding device 41 will be described later.
- transition (TRS) devices 50 and 51 of the upper wafer W1 are provided in two stages in order from the bottom.
- An alignment measurement device 55 is disposed in the fourth processing block G4.
- the alignment measurement device 55 measures the relative positional deviation between the upper wafer W1 and the lower wafer W2 bonded by the bonding device 41.
- the alignment measurement device 55 transmits measurement data to the control device 70 described later.
- the alignment measurement device 55 may be disposed outside the processing station 3 as long as the measurement data can be transmitted to the control device 70. For example, after the superposed wafer T is unloaded from the processing station 3 to the outside via the loading / unloading station 2, the measurement by the alignment measurement device 55 may be received.
- a transport area 60 is formed in the area surrounded by the first processing block G1, the second processing block G2, the third processing block G3 and the fourth processing block G4.
- a transfer device 61 is disposed in the transfer area 60.
- the transfer device 61 has, for example, a transfer arm which 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 moves up the first processing block G1, the second processing block G2, the third processing block G3 and the fourth processing block G4 adjacent to the transfer area 60.
- the wafer W1, the lower wafer W2 and the superposed wafer T are transported.
- the bonding system 1 includes a control device 70.
- the controller 70 controls the operation of the bonding system 1.
- the control device 70 is configured of, for example, a computer, and includes a CPU (Central Processing Unit) 71, a storage medium 72 such as a memory, an input interface 73, and an output interface 74 as shown in FIG.
- the control device 70 performs various controls by causing the CPU 71 to execute the program stored in the storage medium 72.
- the control device 70 also receives an external signal at the input interface 73 and transmits the signal to the external at the output interface 74.
- the program of the control device 70 is stored in the information storage medium and installed from the information storage medium.
- Examples of the information storage medium include a hard disk (HD), a flexible disk (FD), a compact disk (CD), a magnet optical desk (MO), a memory card and the like.
- the program may be downloaded from a server via the Internet and installed.
- FIG. 4 is a plan view showing a bonding apparatus according to one embodiment.
- FIG. 5 is a side view showing a bonding apparatus according to an embodiment.
- the bonding apparatus 41 has a processing container 100 capable of sealing the inside.
- the loading / unloading port 101 of the upper wafer W1, the lower wafer W2 and the superposed wafer T is formed on the side surface of the processing container 100 on the side of the transfer area 60, and the loading / unloading port 101 is provided with an open / close shutter 102.
- the inside of the processing container 100 is divided by the inner wall 103 into a transport region T1 and a processing region T2.
- the loading / unloading port 101 described above is formed on the side surface of the processing container 100 in the transport region T1. Further, the loading / unloading port 104 for the upper wafer W1, the lower wafer W2 and the superposed wafer T is also formed on the inner wall 103.
- the transition 110, the wafer transfer mechanism 111, the reversing mechanism 130, and the position adjustment mechanism 120 are arranged in this order from the side of the loading / unloading port 101, for example.
- the transition 110 temporarily mounts the upper wafer W1, the lower wafer W2 and the superposed wafer T.
- the transition 110 is formed, for example, in two stages, and any two of the upper wafer W1, the lower wafer W2 and the superposed wafer T can be placed simultaneously.
- the wafer transfer mechanism 111 has a transfer arm movable, for example, in the vertical direction (Z-axis direction), in the horizontal direction (Y-axis direction, X-axis direction) and around the vertical axis.
- the wafer transfer mechanism 111 can transfer the upper wafer W1, the lower wafer W2 and the superposed wafer T in the transfer area T1 or between the transfer area T1 and the processing area T2.
- the position adjustment mechanism 120 adjusts the horizontal orientation of the upper wafer W1 and the lower wafer W2. Specifically, the position adjustment mechanism 120 detects the positions of the notches of the upper wafer W1 and the lower wafer W2, and the base 121 provided with a holding unit (not shown) for holding and rotating the upper wafer W1 and the lower wafer W2. And a detection unit 122. The position adjustment mechanism 120 detects the positions of the notches of the upper wafer W1 and the lower wafer W2 using the detection unit 122 while rotating the upper wafer W1 and the lower wafer W2 held by the base 121, thereby obtaining a notch portion. Adjust the position of. Thus, the horizontal orientations of the upper wafer W1 and the lower wafer W2 are adjusted.
- the reversing mechanism 130 reverses the front and back surfaces of the upper wafer W1.
- the reversing mechanism 130 has a holding arm 131 for holding the upper wafer W1.
- the holding arm 131 extends in the horizontal direction (X-axis direction).
- the holding arm 131 is provided with, for example, four holding members 132 for holding the upper wafer W1.
- the holding arm 131 is supported by a drive unit 133 including, for example, a motor.
- the holding arm 131 is pivotable about the horizontal axis by the drive unit 133.
- the holding arm 131 is rotatable about the drive unit 133 and movable in the horizontal direction (X-axis direction).
- a drive part 133 below the drive part 133, another drive part (not shown) provided with a motor etc., for example is provided below the drive part 133.
- the drive unit 133 can move in the vertical direction along the support column 134 extending in the vertical direction.
- the upper wafer W1 held by the holding member 132 can be rotated about the horizontal axis by the drive unit 133 and can be moved in the vertical direction and the horizontal direction. Further, the upper wafer W1 held by the holding member 132 can be rotated about the drive unit 133 to move between the position adjustment mechanism 120 and the upper chuck 140 described later.
- the upper chuck 140 for holding the upper surface (non-bonding surface W1n) of the upper wafer W1 by suction and the lower wafer W2 mounted thereon, and the lower surface (non-bonding surface W2n) of the lower wafer W2 from below
- a lower chuck 141 is provided to hold by suction.
- the lower chuck 141 is provided below the upper chuck 140, and is configured to be disposed so as to face the upper chuck 140.
- the upper chuck 140 and the lower chuck 141 are spaced apart in the vertical direction.
- the upper chuck 140 is held by an upper chuck holding portion 150 provided above the upper chuck 140.
- the upper chuck holding unit 150 is provided on the ceiling surface of the processing container 100.
- the upper chuck 140 is fixed to the processing container 100 via the upper chuck holder 150.
- the upper chuck holding unit 150 is provided with an upper imaging unit 151 that images the upper surface (bonding surface W2j) of the lower wafer W2 held by the lower chuck 141.
- an upper imaging unit 151 that images the upper surface (bonding surface W2j) of the lower wafer W2 held by the lower chuck 141.
- a CCD camera is used for the upper imaging unit 151.
- the lower chuck 141 is supported by a first lower chuck moving unit 160 provided below the lower chuck 141.
- the first lower chuck moving unit 160 moves the lower chuck 141 in the horizontal direction (X-axis direction) as described later. Further, the first lower chuck moving unit 160 is configured to be able to move the lower chuck 141 in the vertical direction and to be rotatable around the vertical axis.
- the first lower chuck moving unit 160 is provided with a lower imaging unit 161 that images the lower surface (bonding surface W1j) of the upper wafer W1 held by the upper chuck 140 (see FIG. 5).
- a CCD camera is used for the lower imaging unit 161 for example.
- the first lower chuck moving unit 160 is provided on the lower surface side of the first lower chuck moving unit 160 and is attached to a pair of rails 162 and 162 extending in the horizontal direction (X-axis direction).
- the first lower chuck moving unit 160 is configured to be movable along the rail 162.
- the pair of rails 162, 162 is disposed in the second lower chuck moving unit 163.
- the second lower chuck moving part 163 is provided on the lower surface side of the second lower chuck moving part 163, and is attached to a pair of rails 164, 164 extending in the horizontal direction (Y-axis direction).
- the second lower chuck moving unit 163 is configured to be movable in the horizontal direction (Y-axis direction) along the rail 164.
- the pair of rails 164, 164 is disposed on the mounting table 165 provided on the bottom surface of the processing container 100.
- An alignment unit 166 is configured by the first lower chuck moving unit 160, the second lower chuck moving unit 163, and the like.
- the alignment unit 166 moves the lower chuck 141 in the X-axis direction, the Y-axis direction, and the ⁇ direction to move the upper wafer W1 held by the upper chuck 140 and the lower wafer W2 held by the lower chuck 141.
- the alignment unit 166 moves the lower chuck 141 in the Z-axis direction to vertically position the upper wafer W1 held by the upper chuck 140 and the lower wafer W2 held by the lower chuck 141. Make a match.
- the alignment unit 166 performs horizontal alignment between the upper wafer W1 and the lower wafer W2 by moving the lower chuck 141 in the X-axis direction, the Y-axis direction, and the ⁇ direction.
- the disclosed technology is not limited to this.
- the alignment unit 166 may move the upper chuck 140 and the lower chuck 141 relatively in the X-axis direction, the Y-axis direction, and the ⁇ direction.
- the alignment unit 166 moves the lower chuck 141 in the X-axis direction and the Y-axis direction and moves the upper chuck 140 in the ⁇ direction to align the upper wafer W1 with the lower wafer W2 in the horizontal direction. You may go.
- the alignment unit 166 of the present embodiment performs vertical alignment of the upper wafer W1 and the lower wafer W2 by moving the lower chuck 141 in the Z-axis direction, but the technology of the present disclosure is limited thereto. I will not.
- the alignment unit 166 may move the upper chuck 140 and the lower chuck 141 relatively in the Z-axis direction.
- the alignment unit 166 may perform vertical alignment of the upper wafer W1 and the lower wafer W2 by moving the upper chuck 140 in the Z-axis direction.
- FIG. 6 is a cross-sectional view showing an upper chuck and a lower chuck according to an embodiment, and is a cross-sectional view showing a state immediately before bonding of the upper wafer and the lower wafer.
- FIG. 7A is a cross-sectional view showing a state in the middle of bonding of the upper wafer and the lower wafer according to one embodiment.
- FIG. 7B is a cross-sectional view showing a state when bonding of the upper wafer and the lower wafer according to one embodiment is completed.
- FIG. 7 (a) and FIG. 7 (b) the arrow shown as a continuous line shows the suction direction of the air by a vacuum pump.
- the upper chuck 140 and the lower chuck 141 are, for example, vacuum chucks.
- the upper chuck 140 corresponds to a first holding portion described in the claims
- the lower chuck 141 corresponds to a second holding portion described in the claims.
- the upper chuck 140 has an adsorption surface 140 a for adsorbing the upper wafer W 1 on the surface (lower surface) opposite to the lower chuck 141.
- the lower chuck 141 has an adsorption surface 141 a for adsorbing the lower wafer W 2 on the surface (upper surface) opposite to the upper chuck 140.
- the upper chuck 140 has a chuck base 170.
- the chuck base 170 has the same diameter as the upper wafer W1 or a diameter larger than the upper wafer W1.
- the chuck base 170 is supported by the support member 180.
- the support member 180 is provided to cover at least the chuck base 170 in plan view, and is fixed to the chuck base 170 by, for example, screwing.
- the support member 180 is supported by a plurality of support columns 181 (see FIG. 5) provided on the ceiling surface of the processing container 100.
- the upper chuck holding portion 150 is configured by the support member 180 and the plurality of support columns 181.
- Through holes 176 are formed in the support member 180 and the chuck base 170 so as to penetrate the support member 180 and the chuck base 170 in the vertical direction.
- the position of the through hole 176 corresponds to the central portion of the upper wafer W ⁇ b> 1 adsorbed and held by the upper chuck 140.
- the pressing pin 191 of the striker 190 is inserted into the through hole 176.
- the striker 190 is disposed 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 cylindrical member extending in the vertical direction, and is supported by the actuator portion 192.
- the actuator unit 192 generates a constant pressure in a fixed direction (here, vertically below) by air supplied from an electropneumatic regulator (not shown), for example.
- the actuator unit 192 can contact the central portion of the upper wafer W1 with air supplied from the electropneumatic regulator to control the pressing load applied to the central portion of the upper wafer W1. Further, the tip end portion of the actuator portion 192 can be vertically moved 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 movement mechanism 193 moves the actuator unit 192 in the vertical direction, for example, by a drive unit including a motor.
- the striker 190 is configured as described above, controls the movement of the actuator unit 192 by the linear movement mechanism 193, and controls the pressing load of the upper wafer W1 by the pressing pin 191 by the actuator unit 192.
- the striker 190 presses the upper wafer W1 held by the upper chuck 140 by suction and the lower wafer W2 held by the lower chuck 141 by suction. Specifically, the striker 190 presses the lower wafer W ⁇ b> 2 by deforming the upper wafer W ⁇ b> 1 held by the upper chuck 140 by suction.
- the striker 190 corresponds to the pressing portion described in the claims.
- the lower surface of the chuck base 170 is provided with a plurality of pins 171 in contact with the non-bonding surface W1n of the upper wafer W1.
- the upper chuck 140 is configured of the chuck base 170, the plurality of pins 171, and the like.
- An adsorption surface 140a for adsorbing and holding the upper wafer W1 of the upper chuck 140 is divided into a plurality of areas in the radial direction, and generation of an adsorption pressure and release of the adsorption pressure are performed for each of the divided areas.
- the lower chuck 141 may be configured in the same manner as the upper chuck 140.
- the lower chuck 141 has a plurality of pins in contact with the non-bonding surface W2n of the lower wafer W2.
- the suction surface 141a for suction-holding the lower wafer W2 of the lower chuck 141 is divided into a plurality of regions in the radial direction, and generation of suction pressure and release of suction pressure are performed for each of the divided regions.
- FIG. 8 is a flowchart showing a part of the process performed by the bonding system according to one embodiment. The various processes shown in FIG. 8 are executed under the control of the control device 70.
- a cassette C1 containing a plurality of upper wafers W1, a cassette C2 containing a plurality of lower wafers W2, and an empty cassette C3 are placed on a predetermined placement plate 11 of the loading / unloading station 2. Thereafter, the upper wafer W1 in the cassette C1 is taken out by the transfer device 22 and transferred to the transition device 50 of the third processing block G3 of the processing station 3.
- the upper wafer W1 is transferred by the transfer unit 61 to the surface modification unit 30 of the first processing block G1.
- the oxygen gas which is a processing gas is excited to be plasmatized and ionized in a predetermined reduced pressure atmosphere.
- the oxygen ions are irradiated to the bonding surface W1j of the upper wafer W1, and the bonding surface W1j is plasma-processed. Thereby, the bonding surface W1j of the upper wafer W1 is reformed (step S101).
- the upper wafer W1 is transferred by the transfer unit 61 to the surface hydrophilization unit 40 of the second processing block G2.
- pure water is supplied onto the upper wafer W1 while rotating the upper wafer W1 held by the spin chuck. Then, the supplied pure water diffuses on the bonding surface W1j of the upper wafer W1, and a hydroxyl group (silanol group) adheres to the bonding surface W1j of the upper wafer W1 reformed in the surface reforming apparatus 30, and the bonding surface W1 j is hydrophilized (step S102). Further, the bonding surface W1j of the upper wafer W1 is cleaned with pure water used for hydrophilization of the bonding surface W1j.
- the upper wafer W1 is transferred by the transfer device 61 to the bonding device 41 of the second processing block G2.
- the upper wafer W ⁇ b> 1 carried into the bonding apparatus 41 is transferred to the position adjusting mechanism 120 by the wafer transfer mechanism 111 via the transition 110.
- the horizontal direction of the upper wafer W1 is adjusted by the position adjustment mechanism 120 (step S103).
- the upper wafer W1 is delivered from the position adjustment mechanism 120 to the holding arm 131 of the reversing mechanism 130. Subsequently, in the transfer region T1, the front and back surfaces of the upper wafer W1 are reversed by inverting the holding arm 131 (step S104). That is, the bonding surface W1j of the upper wafer W1 is directed downward.
- the holding arm 131 of the reversing mechanism 130 is pivoted to move below the upper chuck 140.
- the upper wafer W ⁇ b> 1 is delivered from the reversing mechanism 130 to the upper chuck 140.
- the upper wafer W ⁇ b> 1 holds the non-bonding surface W ⁇ b> 1 n by suction with the upper chuck 140 in a state where the notch portion is directed in a predetermined direction (step S ⁇ b> 105).
- steps S101 to S105 described above is performed on the upper wafer W1
- the processing on the lower wafer W2 is performed.
- the lower wafer W ⁇ b> 2 in the cassette C ⁇ b> 2 is taken out by the transfer device 22 and transferred to the transition device 50 of the processing station 3.
- step S106 the lower wafer W2 is transferred by the transfer device 61 to the surface modification device 30, and the bonding surface W2j of the lower wafer W2 is modified (step S106).
- the modification of the bonding surface W2j of the lower wafer W2 in step S106 is similar to that of step S101 described above.
- the lower wafer W2 is transferred to the surface hydrophilization device 40 by the transfer device 61, and the bonding surface W2j of the lower wafer W2 is hydrophilized (step S107). Further, the bonding surface W2j is cleaned by pure water used for hydrophilization of the bonding surface W2j.
- the hydrophilization of the bonding surface W2j of the lower wafer W2 in step S107 is the same as the hydrophilization of the bonding surface W1j of the upper wafer W1 in step S102.
- the lower wafer W2 is transferred by the transfer device 61 to the bonding device 41.
- the lower wafer W ⁇ b> 2 carried into the bonding apparatus 41 is transferred to the position adjusting mechanism 120 by the wafer transfer mechanism 111 via the transition 110.
- the horizontal direction of the lower wafer W2 is adjusted by the position adjustment mechanism 120 (step S108).
- the lower wafer W2 is transferred to the lower chuck 141 by the wafer transfer mechanism 111, and held by suction by the lower chuck 141 (step S109).
- the non-bonding surface W2n is held by suction on the lower chuck 141 with the notch portion directed in a predetermined direction, that is, the same direction as the notch portion of the upper wafer W1.
- step S110 position adjustment in the horizontal direction between the upper wafer W1 held by the upper chuck 140 and the lower wafer W2 held by the lower chuck 141 is performed (step S110).
- alignment marks W1a, W1b, W1c (see FIG. 9) formed in advance on bonding surface W1j of upper wafer W1 and alignment marks W2a, W2b, W2c formed in advance on bonding surface W2j of lower wafer W2. (See FIG. 9) is used.
- FIG. 9A is a view for explaining the alignment operation between the upper imaging unit and the lower imaging unit according to the embodiment.
- FIG. 9B is a view for explaining the lower wafer imaging operation by the upper imaging unit and the upper wafer imaging operation by the lower imaging unit according to one embodiment.
- FIG. 9C is a view for explaining the alignment operation between the upper wafer and the lower wafer according to one embodiment.
- adjustment of the horizontal position of the upper imaging unit 151 and the lower imaging unit 161 is performed. Specifically, the lower chuck 141 is moved in the horizontal direction by the alignment unit 166 so that the lower imaging unit 161 is positioned substantially below the upper imaging unit 151. Then, the target 149 common to the upper imaging unit 151 and the lower imaging unit 161 is confirmed, and the horizontal position of the lower imaging unit 161 is fine so that the horizontal positions of the upper imaging unit 151 and the lower imaging unit 161 coincide. It is adjusted.
- the lower chuck 141 is moved vertically upward by the alignment unit 166.
- the upper imaging unit 151 sequentially images the alignment marks W2c, W2b, and W2a of the bonding surface W2j of the lower wafer W2.
- the lower imaging unit 161 sequentially images the alignment marks W1a, W1b, W1c of the bonding surface W1j of the upper wafer W1.
- FIG. 9B shows the upper imaging unit 151 imaging the alignment mark W2c of the lower wafer W2 and the lower imaging unit 161 imaging the alignment mark W1a of the upper wafer W1.
- the captured image data is output to the control device 70.
- the control device 70 causes the alignment unit 166 to adjust the horizontal position of the lower chuck 141 based on the image data captured by the upper imaging unit 151 and the image data captured by the lower imaging unit 161.
- This horizontal alignment is performed so that the alignment marks W1a, W1b, W1c of the upper wafer W1 and the alignment marks W2a, W2b, W2c of the lower wafer W2 overlap in a vertical direction.
- the horizontal position of the upper chuck 140 and the lower chuck 141 is adjusted, and the horizontal position of the upper wafer W1 and the lower wafer W2 (for example, including the X-axis position, the Y-axis position and the wedge position) is adjusted.
- Ru for example, including the X-axis position, the Y-axis position and the wedge position
- step S111 adjustment of the vertical positions of the upper wafer W1 held by the upper chuck 140 and the lower wafer W2 held by the lower chuck 141 is performed (step S111). Specifically, the alignment unit 166 moves the lower chuck 141 vertically upward, thereby bringing the lower wafer W2 closer to the upper wafer W1. Thereby, as shown in FIG. 6, the distance S between the bonding surface W2j of the lower wafer W2 and the bonding surface W1j of the upper wafer W1 is adjusted to a predetermined distance, for example, 50 ⁇ m to 200 ⁇ m.
- step S112 After the suction holding of the central portion of the upper wafer W1 by the upper chuck 140 is released (step S112), the upper wafer W1 is lowered by lowering the pressing pin 191 of the striker 190 as shown in FIG. The central part of is depressed (step S113).
- step S113 When the central portion of upper wafer W1 contacts the central portion of lower wafer W2 and the central portion of upper wafer W1 and the central portion of lower wafer W2 are pressed with a predetermined force, the central portion of pressed upper wafer W1 is pressed. Bonding starts with the central portion of lower wafer W2. Thereafter, a bonding wave is generated to bond the upper wafer W1 and the lower wafer W2 gradually from the central portion toward the outer peripheral portion.
- the bonding surface W1j of the upper wafer W1 and the bonding surface W2j of the lower wafer W2 are modified in steps S101 and S106 respectively, first, van der Waals force (intermolecular force) between the bonding surfaces W1j and W2j. And the bonding surfaces W1j and W2j are bonded to each other. Furthermore, since the bonding surface W1j of the upper wafer W1 and the bonding surface W2j of the lower wafer W2 are hydrophilized in steps S102 and S107, respectively, the hydrophilic groups between the bonding surfaces W1j and W2j are hydrogen bonded, and the bonding surfaces W1j and W2j They are firmly joined together.
- step S114 the entire chucking of the upper wafer W1 by the upper chuck 140 is released (step S114).
- the bonding surface W1j of the upper wafer W1 and the bonding surface W2j of the lower wafer W2 abut on the entire surface, and the upper wafer W1 and the lower wafer W2 are bonded.
- the pressing pin 191 is raised to the upper chuck 140, and the suction holding of the lower wafer W2 by the lower chuck 141 is released.
- the superposed wafer T is transferred by the transfer device 61 to the alignment measurement device 55 of the fourth processing block G4.
- the alignment measurement device 55 although the details will be described later, relative between a plurality of alignment marks W1a, W1b, W1c formed on the upper wafer W1 and a plurality of alignment marks W2a, W2b, W2c formed on the lower wafer W2. Position is measured (step S115).
- the superposed wafer T is transferred by the transfer unit 61 to the transition unit 51 of the third processing block G3, and then transferred by the transfer unit 22 of the loading / unloading station 2 to the cassette C3.
- a series of bonding processes are completed.
- FIG. 10 is a cross-sectional view showing an alignment measurement apparatus according to an embodiment.
- Alignment measurement apparatus 55 includes a plurality of alignment marks W1a, W1b and W1c (see FIG. 9) formed on upper wafer W1, and a plurality of alignment marks W2a, W2b and W2c (see FIG. 9) formed on lower wafer W2.
- And relative positional deviation (hereinafter, also simply referred to as "positional deviation”) are measured.
- positional deviation means positional deviation when viewed from a direction perpendicular to the bonding surfaces W1 j and W2 j of the upper wafer W1 and the lower wafer W2.
- the alignment measurement device 55 corresponds to the measurement unit described in the claims.
- the alignment measurement apparatus 55 includes, for example, a superposed wafer holding unit 901 that holds the superposed wafer T horizontally, an infrared imaging unit 902 that acquires an infrared image of the superposed wafer T held by the superposed wafer holding unit 901, and a superposed wafer And an infrared irradiator 903 for irradiating the region for acquiring an infrared image of T with infrared light.
- the infrared imaging unit 902 and the infrared irradiation unit 903 are provided on opposite sides of the superposed wafer holding unit 901.
- the infrared imaging unit 902 is provided above the superposed wafer holding unit 901
- the infrared irradiation unit 903 is provided below the superposed wafer holding unit 901.
- the infrared imaging unit 902 and the infrared irradiation unit 903 are coaxially arranged.
- the infrared light emitted from the infrared irradiation unit 903 passes through the opening of the superposed wafer holding unit 901 formed in a ring shape, and is vertically incident on the superposed wafer T held by the superposed wafer holding unit 901.
- the infrared rays transmitted through the superposed wafer T are received by the infrared imaging unit 902.
- Each infrared image acquired by the infrared imaging unit 902 includes at least one of both the alignment mark of the upper wafer W1 and the alignment mark of the lower wafer W2. Therefore, relative positional deviation between the alignment mark of the upper wafer W1 and the alignment mark of the lower wafer W2 can be measured in each infrared image.
- the alignment measurement device 55 includes a moving unit (not shown) that moves the superposed wafer holding unit 901 in the X-axis direction, the Y-axis direction, and the ⁇ direction. By moving the superposed wafer holding unit 901, it is possible to change the area for acquiring the infrared image of the superposed wafer T, and to measure the positional deviation at a plurality of locations of the superposed wafer T.
- the moving part of this embodiment moves the superposition
- what is necessary is just to relatively move the superposition
- FIG. Even if the superposed wafer holding unit 901 is moved or the infrared imaging unit 902 is moved, the region for acquiring the infrared image of the superposed wafer T can be changed, and the positional deviation can be measured at a plurality of positions of the superposed wafer T.
- FIG. 11 is a diagram showing components of the control device according to an embodiment in functional blocks.
- Each functional block illustrated in FIG. 11 is conceptual, and does not necessarily have to be physically configured as illustrated. All or part of each functional block can be functionally or physically distributed and integrated in any unit.
- Each processing function performed in each functional block may be realized by a program executed by the CPU, in whole or any part thereof, or may be realized as hardware by wired logic.
- the control device 70 includes a measurement data analysis unit 701, an alignment control unit 702, a distortion control unit 703, a determination unit 704, and the like.
- the measurement data analysis unit 701 analyzes measurement data measured by the alignment measurement device 55.
- the alignment control unit 702 is based on the positional deviation caused in the past bonding, in the horizontal plane of the upper wafer W1 held by the upper chuck 140 in the current bonding and the lower wafer W2 held by the lower chuck 141. Control the alignment in The strain control unit 703 controls the strain of the lower wafer W2 held by the lower chuck 141 in the present bonding based on the positional deviation generated in the past bonding.
- the determination unit 704 determines by statistical analysis whether there is a significant difference between the positional deviation generated in the past joint and the positional deviation generated in the present joint. For example, when the statistical value is outside the preset range, it is determined that there is a significant difference. In addition, when the statistical value is within a preset range, it is determined that there is no significant difference.
- FIG. 12 is an explanatory diagram of processing by the measurement data analysis unit according to the embodiment.
- Fig.12 (a) is a figure which shows the positional offset in multiple places in xy coordinate system fixed to the superposition
- the x-axis and the y-axis are axes perpendicular to each other and parallel to the bonding surface W1j of the upper wafer W1 and the bonding surface W2j of the lower wafer W2.
- FIG. 12A the x-axis and the y-axis are axes perpendicular to each other and parallel to the bonding surface W1j of the upper wafer W1 and the bonding surface W2j of the lower wafer W2.
- FIG. 12 (b) is an explanatory view showing the size of the positional deviation shown in FIG. 12 (a) and the positional deviation at each place remaining after performing parallel movement and rotational movement for minimizing variation.
- FIG. 12B the x-axis and y-axis shown by solid lines are fixed to the upper wafer W1, and the x-axis and y-axis shown by broken lines are fixed to the lower wafer W2.
- the measurement data analysis unit 701 calculates positional deviations at a plurality of locations in the xy coordinate system fixed to the superposed wafer T. For this calculation, relative positional deviation between the alignment marks W1a, W1b, W1c of the upper wafer W1 and the alignment marks W2a, W2b, W2c of the lower wafer W2 in the image taken by the infrared imaging unit 902 and the image are taken.
- the horizontal position (including the position in the X-axis direction, the position in the Y-axis direction, and the position in the ⁇ ⁇ ⁇ ⁇ direction) of the overlapped wafer holding unit 901 with respect to the infrared imaging unit 902 at the time is used.
- the measurement location which measures positional offset is not limited to three places, You may be four or more places.
- the shape of the alignment mark for measuring the positional deviation is not limited to the cross shape.
- the measurement data analysis unit 701 translates (.DELTA.x, .DELTA.y) parallel movement of the lower wafer W2 with respect to the upper wafer W1 in order to minimize the magnitude and variation of positional deviation.
- the rotational movement ( ⁇ ) is calculated.
- the translational movement and rotational movement are performed, for example, such that the maximum value of the positional deviation is as small as possible, and the standard deviation of the positional deviation is as small as possible.
- the variation may be expressed as the difference between the maximum value and the minimum value instead of the standard deviation.
- the measurement data analysis unit 701 also calculates the positional deviation at each location remaining after performing the parallel movement and the rotational movement.
- the calculation of the optimal translational and rotational movement and the calculation of the positional deviation at each location remaining after the optimal translational and rotational movement are performed are performed substantially simultaneously.
- the lower wafer W2 is translated and rotated, but the lower wafer W2 may be translated and the upper wafer W1 may be rotated, or the upper wafer W1 may be translated and rotated. Good.
- FIG. 13 is a flowchart showing processing for obtaining settings of the bonding apparatus based on measurement data of the alignment measurement apparatus according to one embodiment.
- the processes after step S201 in FIG. 13 are performed under the control of the control device 70, and are executed, for example, when a correction command for alignment is received.
- the correction command for alignment is created, for example, when the manufacturing conditions (including the manufacturing lot) of the upper wafer W1 and the lower wafer W2 are changed.
- the bonding system 1 performs steps S101 to S114 of FIG. 8 to bond the upper wafer W1 and the lower wafer W2 (step S201).
- the alignment measurement device 55 measures the relative positional deviation between the upper wafer W1 and the lower wafer W2 at a plurality of locations as in step S115 of FIG. 8 (step S202).
- the measurement data analysis unit 701 calculates translation (.DELTA.x, .DELTA.y) and rotation (.DELTA..theta.) To minimize the magnitude and variation of positional deviation (step S203). In addition, the measurement data analysis unit 701 calculates the positional deviation at each place remaining after the parallel movement and rotational movement calculated in step S203 (step S204).
- step S203 calculation of the parallel movement and the rotational movement (step S203) and the calculation of the positional deviation at each portion remaining after the parallel movement and the rotational movement are performed (step S204) are substantially simultaneously performed.
- the measurement data analysis unit 701 checks whether the accumulated number of calculated data is equal to or more than a predetermined number (step S205).
- the calculated data is data relating to translation (.DELTA.x, .DELTA.y) and rotational movement (.DELTA..theta.), And positional deviation at each location remaining after the parallel movement and rotational movement are performed.
- the predetermined number is set to, for example, a number (e.g., 20) or more that is expected when the distribution of calculation data becomes a normal distribution.
- step S205 If the accumulated number of calculated data is less than the predetermined number (No at step S205), the accumulated number of calculated data does not reach a sufficient number for statistical analysis, so the distribution of the calculated data is biased due to an accidental disturbance. There is a fear that has occurred. Therefore, in this case, the control device 70 returns to step S201, and repeats the processes after step S201. That is, steps S201 to S204 are repeated until the number of superposed wafers T reaches a predetermined number.
- Step S205 when the number of accumulation of calculation data is more than predetermined number (Step S205, Yes), the number of accumulation reaches the number sufficient for statistical analysis. Therefore, the control device 70 proceeds to step S206, and performs processing of step S206 and subsequent steps.
- step S206 the measurement data analysis unit 701 statistically analyzes the calculated data to use correction data ( ⁇ X, ⁇ Y, ⁇ ) used for horizontal alignment between the upper wafer W1 and the lower wafer W2 performed before bonding.
- correction data for example, an average value of calculation data ( ⁇ x, ⁇ y, ⁇ ) is adopted.
- the median of the calculated data ( ⁇ x, ⁇ y, ⁇ ) is adopted as the correction data ( ⁇ X, ⁇ Y, ⁇ ) It may be done.
- the measurement data analysis unit 701 predicts a positional deviation remaining when performing horizontal alignment using the correction data (step S207).
- this positional deviation for example, an average value (or median value) of calculated data is adopted.
- the measurement data analysis unit 701 sets a parameter that causes the lower wafer W2 to be distorted in order to reduce the predicted positional deviation (step S208).
- a parameter that causes the lower wafer W2 to be distorted in order to reduce the predicted positional deviation.
- the shape of the suction surface 141a etc. are mentioned.
- the distortion of the lower wafer W2 can be controlled by controlling the distribution of the suction pressure on the suction surface 141a of the lower chuck 141.
- the suction surface 141a of the lower chuck 141 is divided into a plurality of areas, and the suction pressure is set for each of the divided areas.
- a suction pressure may be generated over the entire suction surface 141a of the lower chuck 141, or suction is performed by only a part of the suction surface 141a of the lower chuck 141. Pressure may be generated.
- the distortion of the lower wafer W2 can be controlled while keeping the temperature of the lower wafer W2 constant.
- the lower wafer W2 When the temperature distribution of the lower wafer W2 changes, the lower wafer W2 locally expands and contracts, so the shape of the lower wafer W2 changes. Therefore, distortion can be controlled by controlling the temperature distribution of the lower wafer W2.
- the control of the temperature distribution of the lower wafer W2 is performed, for example, in a state where the suction of the lower wafer W2 by the lower chuck 141 is released. Subsequently, the lower chuck 141 adsorbs the lower wafer W2 in a state where the temperature distribution of the lower wafer W2 is dispersed. Thereafter, the shape of the lower wafer W2 is fixed until the suction of the lower wafer W2 is released again. By the time the suction of the lower wafer W2 is released again, even if the temperature distribution of the lower wafer W2 becomes uniform, the shape when the temperature distribution of the lower wafer W2 has become uneven is maintained.
- the suction surface 141 a of the lower chuck 141 may be deformed, for example, between a flat surface and a curved surface.
- the curved surface has, for example, an upwardly convex dome shape.
- the shape of the lower wafer W2 becomes an upwardly convex dome.
- the lower wafer W2 can be expanded in the radial direction, and the size of the lower wafer W2 and the size of the upper wafer W1 can be made uniform.
- the upper wafer W ⁇ b> 1 is bent downward by the striker 190 into a convex dome shape and radially expanded.
- the distortion of the lower wafer W2 may be controlled by controlling one of the parameters (1) to (3), or the distortion of the lower wafer W2 may be controlled by controlling a plurality of parameters. May be When controlling a plurality of parameters, the combination of parameters is not particularly limited.
- the correction data ( ⁇ X, ⁇ Y, ⁇ ) used for the horizontal alignment of the upper wafer W1 and the lower wafer W2 performed before bonding is reset according to the setting of the parameter causing the lower wafer W2 to be distorted. May be performed.
- FIG. 14 is a flowchart showing an operation process of the bonding apparatus based on measurement data of the alignment measurement apparatus according to the embodiment.
- the processes after step S301 in FIG. 14 are performed under the control of control device 70. For example, when an instruction to bond upper wafer W1 and lower wafer W2 is received after the end of the series of processes shown in FIG. To be executed.
- bonding system 1 carries out steps S101 to S114 of FIG. 8 according to the settings obtained in steps S206 and S208 of FIG. 13, and bonds upper wafer W1 and lower wafer W2 (step S301).
- the strain control unit 703 carries out suction holding of the lower wafer W2 in step S109 in FIG. 8 according to the setting of the suction pressure obtained in step S208 in FIG.
- the distortion of the lower wafer W2 may be controlled by the adsorption surface shape, temperature, etc., in addition to the adsorption pressure.
- the alignment control unit 702 performs horizontal alignment in step S110 of FIG. 8 based on the setting of the correction data ( ⁇ X, ⁇ Y, ⁇ ) obtained in step S206 of FIG. Specifically, the alignment control unit 702 performs horizontal alignment based on the image data captured by the upper imaging unit 151, the image data captured by the lower imaging unit 161, and the correction data. For example, the difference between the position of the lower chuck 141 after horizontal alignment determined based on both image data and correction data and the position of the lower chuck 141 after horizontal alignment determined based only on both image data is, for example, corrected Equal to the data.
- the horizontal alignment is performed by the movement of the lower chuck 141 in this embodiment, but may be performed by the movement of the upper chuck 140 as described above, or may be performed by both movements.
- the alignment measuring device 55 measures the relative positional deviation between the upper wafer W1 and the lower wafer W2 at a plurality of locations as in step S202 of FIG. 13 (step S302).
- the measurement data analysis unit 701 calculates translation (.DELTA.x, .DELTA.y) and rotation (.DELTA..theta.) To minimize the magnitude and variation of positional deviation, as in step S203 of FIG. Step S303). In addition, the measurement data analysis unit 701 calculates the positional deviation at each place remaining after the parallel movement and the rotational movement calculated in step S303 are performed (step S304).
- step S303 The calculation of the parallel movement and the rotational movement (step S303) and the calculation of the positional deviation at each portion remaining after the parallel movement and the rotational movement are performed (step S304) are substantially simultaneously performed.
- the determination unit 704 determines by statistical analysis whether there is a significant difference between the positional deviation generated in the past bonding and the positional deviation generated in the present welding (step S305). It may be determined by statistical analysis whether or not there is a significant difference between the positional deviation that has occurred in the past plural times of joining and the positional deviation that has occurred in the latest several times (including the current). For statistical analysis, for example, t-test (Student's t-test) or F-test (F test) is used.
- step S203 of FIG. 13 For example, translation (.DELTA.x, .DELTA.y) and rotational movement (.DELTA..theta.) Calculated in step S203 of FIG. 13 and positions calculated in step S204 of FIG. At least one selected from positional deviation at a point is used. Only ⁇ x or only ⁇ y may be used.
- positional deviation caused in the current bonding for example, translation (.DELTA.x, .DELTA.y) and rotation (.DELTA..theta.) Calculated in step S303 of FIG. 14 and calculation in step S304 of FIG. At least one selected from positional deviation at each location is used. Only ⁇ x or only ⁇ y may be used.
- the determination unit 704 determines that the process is abnormal (step S306), and ends the current process.
- the control device 70 may notify the user of the bonding system 1 of an alarm.
- the alarm is output in the form of an image, voice, buzzer or the like.
- the determination unit 704 determines that the processing is normal (step S307), and ends the current processing as it is.
- the horizontal alignment in the present joining is controlled based on the positional deviation between the alignment marks generated in the past joining. It is possible to reduce positional deviation between alignment marks that can not be eliminated by horizontal alignment based on only image data of the upper imaging unit 151 and the lower imaging unit 161.
- the distortion of the lower wafer W2 in the present bonding is controlled based on the positional deviation between the alignment marks generated in the past bonding. Therefore, it is possible to reduce the positional deviation between the alignment marks which can not be eliminated by the relative parallel movement or rotational movement between the upper wafer W1 and the lower wafer W2.
- the present embodiment it is determined by statistical analysis whether there is a significant difference between the positional deviation of the alignment marks generated in the past bonding and the positional deviation of the alignment marks generated in the current welding. .
- the quality of the superposed wafer T deviates from the allowable range, and it can be determined whether a problem such as an adsorption failure has occurred.
- problems such as a suction failure occur, by interrupting the bonding, it is possible to suppress useless production of defective products.
- FIG. 15 is a plan view showing a suction surface of a lower chuck according to an embodiment.
- Lower chuck 141 shown in FIG. 15 has a plurality of areas (for example, arc area A1, arc area) in which an adsorption pressure (for example, vacuum pressure) for adsorbing lower wafer W2 to suction surface 141a for adsorbing lower wafer W2 is independently controlled.
- the arc area A1 and the arc area A2 are alternately arranged in the circumferential direction to form a ring area A.
- arc area B1 and arc area B2 are alternately arranged in the circumferential direction, and a ring area B is formed.
- a circular area C is formed inside the ring area B. That is, the suction surface 141 a is divided into the ring area A, the ring area B, and the circular area C from the radially outer side toward the radially inner side.
- the ring area A is divided into a plurality of arc areas A1 and A2 in the circumferential direction.
- the ring area B is divided into a plurality of arc areas B1 and B2 in the circumferential direction.
- One vacuum pump 251 is connected to a plurality of arc regions A1 via piping in which one vacuum regulator 261 is provided in the middle (in FIG. 15, only piping connected to one arc region A1 is shown).
- one vacuum pump 252 is connected to a plurality of arc regions A2 via piping in which one vacuum regulator 262 is provided halfway (in FIG. 15, only piping connected to one arc region A2 is illustrated) ).
- one vacuum pump 253 is connected to a plurality of arc regions B1 via a pipe provided with one vacuum regulator 263 (only a pipe connected to one arc region B1 is illustrated in FIG. 15). ).
- one vacuum pump 254 is connected to a plurality of arc regions B2 via piping in which one vacuum regulator 264 is provided halfway (in FIG. 15, only piping connected to one arc region B2 is illustrated) ). Further, one vacuum pump 255 is connected to one circular area C via a pipe provided with one vacuum regulator 265 in the middle.
- control device 70 When control device 70 operates vacuum pump 251, vacuum pump 251 generates a vacuum pressure in each arc area A1, and the vacuum pressure is maintained at a preset value set in vacuum regulator 261, and corresponds to the preset value. A suction pressure is generated in each arc area A1. When the controller 70 stops the operation of the vacuum pump 251, each arc area A1 returns to the atmospheric pressure, and the generation of the adsorption pressure in each arc area A1 is cancelled. The generation and release of the suction pressure in the other arc regions A2, B1, B2, and C are the same as the generation and release of the suction pressure in the arc region A1, and thus the description thereof is omitted.
- An adsorption pressure distribution control unit 250 is configured by the vacuum pumps 251 to 255, the vacuum regulators 261 to 265, and the like.
- the suction pressure distribution adjustment unit 250 causes the lower wafer W2 to be distorted by adjusting the distribution of suction pressure for suctioning the lower wafer W2 of the lower chuck 141.
- the distribution of the adsorption pressure can be changed by changing the vacuum pump to be operated among the plurality of vacuum pumps 251 to 255, changing the set values of the vacuum regulators 261 to 265, or the like. These setting changes are made by the distortion control unit 703.
- the arrangement of the regions in which the adsorption pressure is independently controlled is not limited to the arrangement shown in FIG.
- the adsorption pressure distribution control unit 250 is configured by a plurality of internal electrodes embedded inside the lower chuck 141, a power supply unit that supplies power to the plurality of internal electrodes independently, and the like.
- the power supply unit includes, for example, a step-down DC / DC converter or a step-up DC / DC converter.
- the distribution of the adsorption pressure can be changed by changing the internal electrode that supplies power among the plurality of internal electrodes, changing the supplied power, or the like.
- FIG. 16 is a side view showing an upper chuck, a lower chuck, and a temperature distribution adjustment unit according to an embodiment.
- the upper chuck 140 and the temperature distribution control unit 500 are fixed to a common horizontal frame 590, and the lower chuck 141 is disposed below the upper chuck 140 and the temperature distribution control unit 500.
- the temperature distribution adjustment unit 500 causes the lower wafer W2 to be distorted by adjusting the temperature distribution of the lower wafer W2 held by the lower chuck 141.
- the temperature distribution adjustment unit 500 includes a main body 510 having a lower surface larger in diameter than the lower wafer W2, a support 520 for supporting the main body 510 from above, and an elevation unit 530 for moving the support 520 in the vertical direction. Prepare.
- the main body portion 510 can be raised and lowered below the horizontal frame 590.
- the elevation unit 530 is fixed to the horizontal frame 590, and raises and lowers the main body 510 with respect to the horizontal frame 590. Thereby, the distance between the main body 510 and the lower chuck 141 can be adjusted.
- FIG. 17 is a side cross-sectional view showing the main body of the temperature distribution adjustment unit according to one embodiment.
- main unit 510 includes cooling unit 550 and heating unit 560.
- Cooling unit 550 is, for example, a flow passage formed inside of main body unit 510, and includes an inflow pipe 551 for causing a refrigerant such as cooling water to flow into cooling unit 550, and an outflow pipe 552 for causing the refrigerant to flow out from cooling unit 550. Connected to The cooling unit 550 cools the lower wafer W2 entirely and uniformly by circulating the temperature-controlled refrigerant.
- heating unit 560 can locally heat lower wafer W2. Specifically, heating unit 560 has a plurality of independent heat generation regions 561a, and selectively heats the plurality of heat generation regions 561a to heat a part or the whole of lower wafer W2. be able to. Selection of the heat generation area 561 a is made by the distortion control unit 703.
- local heating of lower wafer W2 by heating unit 560 and temperature control of lower wafer W2 by cooling unit 550 can be simultaneously performed.
- local heating of the lower wafer W2 is performed in the present embodiment, local cooling of the lower wafer W2 may be performed. It is sufficient if the temperature distribution of the lower wafer W2 has variations.
- the adjustment of the temperature distribution of the lower wafer W2 is performed, for example, in a state where the suction of the lower wafer W2 by the lower chuck 141 is released. Subsequently, the lower chuck 141 adsorbs the lower wafer W2 in a state where the temperature distribution of the lower wafer W2 is dispersed. Thereafter, the lower wafer W2 and the upper wafer W1 are bonded, and the shape of the lower wafer W2 is fixed until the adsorption of the lower wafer W2 is released again.
- FIG. 18 is a side sectional view showing a lower chuck according to a modification.
- FIG. 18A shows a state in which the suction surface 141a of the lower chuck 141 is a flat surface
- FIG. 18B shows a state in which the suction surface 141a of the lower chuck 141 is a convex dome-shaped curved surface.
- Indicates the state of The lower chuck 141 of this modification has an elastic deformation portion 610 having an adsorption surface 141 a for adsorbing the lower wafer W 2, and a base portion 620 for supporting the elastic deformation portion 610.
- the elastically deformable portion 610 has a suction groove 601 on the suction surface 141a for suctioning the lower wafer W2.
- the layout of the suction grooves 601 can be set arbitrarily.
- the suction groove 601 is connected to a vacuum pump 603 via a suction pipe 602.
- the vacuum pump 603 When the vacuum pump 603 is operated, the lower wafer W2 is vacuum-adsorbed on the upper surface of the elastic deformation portion 610.
- the vacuum suction of the lower wafer W2 is released.
- the elastically deformable portion 610 is formed of, for example, a ceramic material such as alumina ceramic or SiC. Further, similarly to the elastically deformable portion 610, the base portion 620 is also formed of a ceramic material such as alumina ceramic or SiC.
- the base portion 620 is provided below the elastic deformation portion 610, and a fixing ring 630 is provided around the elastic deformation portion 610.
- the outer peripheral portion of the elastically deformable portion 610 is fixed to the base portion 620 by the fixing ring 630.
- the suction surface deformation unit 650 adjusts the shape of the suction surface 141 a of the elastic deformation unit 610 by adjusting the pressure of the pressure variable space 640.
- the suction surface deforming portion 650 has an air supply and exhaust pipe 651, and the air supply and exhaust pipe 651 is connected to an air supply and exhaust port 621 formed on the upper surface of the base portion 620.
- An electropneumatic regulator 653 for supplying air to the pressure variable space 640 and a vacuum pump 654 for discharging the air of the pressure variable space 640 are connected to the air supply and exhaust pipe 651 via the switching valve 652.
- the switching valve 652 is switched between the following state (A) and the following state (B).
- (A) The flow path connecting the switching valve 652 and the vacuum pump 654 is opened to the air supply and exhaust port 621 and the flow path connecting the switching valve 652 and the electropneumatic regulator 653 is closed to the air supply and exhaust port 621 .
- the elastically deformable portion 610 is adsorbed to the base portion 620.
- the upper surface of the elastically deformable portion 610 is a flat surface.
- the elastically deformable portion 610 when air is supplied to the inside of the pressure variable space 640 by the electro-pneumatic regulator 653 and pressurized (for example, 0 kPa to 100 kPa), the elastically deformable portion 610 is pressed from below. Since the outer peripheral portion of the elastically deformable portion 610 is fixed to the base portion 620 by the fixing ring 630, the central portion of the elastically deformable portion 610 protrudes from the outer peripheral portion, and the upper surface of the elastically deformable portion 610 becomes a curved surface. This curved surface is in the shape of a convex dome. The radius of curvature of the curved surface can be controlled by the pressure of the pressure variable space 640. The setting change of the air pressure of the pressure variable space 640 is performed by the strain control unit 703.
- the shape of the lower wafer W2 changes so as to follow the change. Therefore, by controlling the shape of the suction surface 141a of the lower chuck 141, the distortion of the lower wafer W2 can be controlled.
- the suction pressure distribution control unit 250, the temperature distribution control unit 500, or the suction surface deformation unit 650 is used as a strain generation unit.
- the distortion generation unit generates distortion on the lower wafer W2 adsorbed by the lower chuck 141 under the control of the distortion control unit 703.
- the adsorption pressure distribution adjustment unit 250, the temperature distribution adjustment unit 500, and the adsorption surface deformation unit 650 may be used alone or in combination. The combination is not particularly limited.
- the strain control unit 703 in the embodiment and the modification controls strain of the lower wafer W2 adsorbed to the lower chuck 141, but may control strain of the upper wafer W1 adsorbed to the upper chuck 140. That is, in the embodiment and the modification, the upper wafer W1 corresponds to the first substrate, the upper chuck 140 corresponds to the first holding unit, the lower wafer W2 corresponds to the second substrate, and the lower chuck 141 corresponds to the second holding unit. However, the upper wafer W1 may correspond to the second substrate, the upper chuck 140 may correspond to the second holding unit, the lower wafer W2 may correspond to the first substrate, and the lower chuck 141 may correspond to the first holding unit.
- the distortion control unit 703 may control both the distortion of the lower wafer W2 and the distortion of the upper wafer W1.
- Alignment measuring device (measuring unit) 70
- Control device 140 Upper chuck (first holder) 140a suction surface 141 lower chuck (second holding unit) 141a suction surface 166 alignment part 190 striker (pressing part) 701 Measurement Data Analysis Unit 702 Alignment Control Unit 703 Distortion Control Unit 704 Determination Unit W1 Upper Wafer (First Substrate) W2 lower wafer (second substrate)
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Abstract
Description
鉛直方向に離間して配置される第1保持部および第2保持部を備え、前記第1保持部は第1基板を吸着保持する吸着面を前記第2保持部に対向する面に有し、前記第2保持部は第2基板を吸着保持する吸着面を前記第1保持部に対向する面に有し、
前記第1保持部と前記第2保持部とを相対的に移動させることにより、前記第1保持部に保持されている前記第1基板と、前記第2保持部に保持されている前記第2基板との水平方向位置合わせを行う位置合わせ部と、
前記第1保持部に保持されている前記第1基板と、前記第2保持部に保持されている前記第2基板とを押付け合せる押圧部と、
前記押圧部によって接合された前記第1基板のアライメントマークと前記第2基板のアライメントマークとの位置ずれを測定する測定部と、
過去の接合において生じた前記位置ずれに基づき、今回の接合における前記水平方向位置合わせを制御する位置合わせ制御部とを備える。
図1は、一実施形態にかかる接合システムを示す平面図である。図2は、一実施形態にかかる接合システムを示す側面図である。図3は、一実施形態にかかる第1基板および第2基板の接合前の状態を示す側面図である。図1に示す接合システム1は、第1基板W1と第2基板W2とを接合することによって重合基板T(図7(b)参照)を形成する。
図4は、一実施形態にかかる接合装置を示す平面図である。図5は、一実施形態にかかる接合装置を示す側面図である。
図8は、一実施形態にかかる接合システムが実行する処理の一部を示すフローチャートである。なお、図8に示す各種の処理は、制御装置70による制御下で実行される。
図10は、一実施形態にかかるアライメント測定装置を示す断面図である。アライメント測定装置55は、上ウェハW1に形成された複数のアライメントマークW1a、W1b、W1c(図9参照)と、下ウェハW2に形成された複数のアライメントマークW2a、W2b、W2c(図9参照)との相対的な位置ずれ(以下、単に「位置ずれ」とも呼ぶ。)を測定する。本明細書において、位置ずれとは、上ウェハW1と下ウェハW2の接合面W1j、W2jに対し垂直な方向から見たときの位置ずれを意味する。アライメント測定装置55が、特許請求の範囲に記載の測定部に対応する。
図15は、一実施形態にかかる下チャックの吸着面を示す平面図である。図15に示す下チャック141は、下ウェハW2を吸着する吸着面141aに、下ウェハW2を吸着する吸着圧力(例えば真空圧力)が独立に制御される複数の領域(例えば円弧領域A1、円弧領域A2、円弧領域B1、円弧領域B2、円領域C)を有する。円弧領域A1および円弧領域A2は、周方向に交互に並び、リング領域Aを形成する。このリング領域Aの径方向内側には、円弧領域B1および円弧領域B2が周方向に交互に並び、リング領域Bを形成する。リング領域Bの内側には、円領域Cが形成される。つまり、吸着面141aは、径方向外側から径方向内側に向けて、リング領域A、リング領域Bおよび円領域Cに区画される。リング領域Aは、周方向に、複数の円弧領域A1、A2に区画される。同様に、リング領域Bは、周方向に、複数の円弧領域B1、B2に区画される。
以上、本開示の接合システムおよび接合方法などの実施形態について説明したが、本開示は上記実施形態などに限定されない。特許請求の範囲に記載された範疇内において、各種の変更、修正、置換、付加、削除、および組合わせが可能である。それらについても当然に本開示の技術的範囲に属する。
55 アライメント測定装置(測定部)
70 制御装置
140 上チャック(第1保持部)
140a 吸着面
141 下チャック(第2保持部)
141a 吸着面
166 位置合わせ部
190 ストライカー(押圧部)
701 測定データ解析部
702 位置合わせ制御部
703 歪み制御部
704 判定部
W1 上ウェハ(第1基板)
W2 下ウェハ(第2基板)
Claims (10)
- 鉛直方向に離間して配置される第1保持部および第2保持部を備え、前記第1保持部は第1基板を吸着保持する吸着面を前記第2保持部に対向する面に有し、前記第2保持部は第2基板を吸着保持する吸着面を前記第1保持部に対向する面に有し、
前記第1保持部と前記第2保持部とを相対的に移動させることにより、前記第1保持部に保持されている前記第1基板と、前記第2保持部に保持されている前記第2基板との水平方向位置合わせを行う位置合わせ部と、
前記第1保持部に保持されている前記第1基板と、前記第2保持部に保持されている前記第2基板とを押付け合せる押圧部と、
前記押圧部によって接合された前記第1基板のアライメントマークと前記第2基板のアライメントマークとの位置ずれを測定する測定部と、
過去の接合において生じた前記位置ずれに基づき、今回の接合における前記水平方向位置合わせを制御する位置合わせ制御部とを備える、接合システム。 - 前記第2保持部に保持される前記第2基板に歪みを生じさせる歪み発生部と、
過去の接合において生じた前記位置ずれに基づき、今回の接合における前記歪みを制御する歪み制御部とを備える、請求項1に記載の接合システム。 - 前記歪み発生部は、前記第2保持部の前記第2基板を吸着する吸着圧力の分布を調節することにより、前記第2基板に前記歪みを生じさせる吸着圧力分布調節部を有する、請求項2に記載の接合システム。
- 前記歪み発生部は、前記第2基板の温度分布を調節することにより、前記第2基板に前記歪みを生じさせる温度分布調節部を有する、請求項2または3に記載の接合システム。
- 前記歪み発生部は、前記第2保持部の前記第2基板を吸着する吸着面を変形することにより、前記吸着面に予め吸着された前記第2基板に前記歪みを生じさせる吸着面変形部を有する、請求項2~4のいずれか1項に記載の接合システム。
- 過去の接合において生じた前記位置ずれと、今回の接合において生じた前記位置ずれとに有意差が有るか否かを統計解析により判定する判定部を有する、請求項1~5のいずれか1項に記載の接合システム。
- 前記第1基板の前記第2基板と接合される接合面、および前記第2基板の前記第1基板と接合される接合面を改質する表面改質装置と、
前記表面改質装置で改質された、前記第1基板の前記接合面および前記第2基板の前記接合面を親水化する表面親水化装置と、
前記第1保持部、前記第2保持部、前記位置合わせ部および前記押圧部を有し、前記表面親水化装置で親水化された、前記第1基板の前記接合面と前記第2基板の前記接合面とを向い合せて接合する接合装置と、
前記測定部を有し、前記接合装置で接合された前記第1基板のアライメントマークと前記第2基板のアライメントマークとの前記位置ずれを測定するアライメント測定装置とを備える、請求項1~6のいずれか1項に記載の接合システム。 - 鉛直方向に離間して配置される第1保持部および第2保持部のうち、前記第1保持部の前記第2保持部に対向する吸着面で第1基板を吸着保持すると共に、前記第2保持部の前記第1保持部に対向する吸着面で第2基板を吸着保持し、
前記第1保持部と前記第2保持部とを相対的に移動させることにより、前記第1保持部に吸着保持されている前記第1基板と前記第2保持部に吸着保持されている前記第2基板との水平方向位置合わせを行い、
前記第1保持部に吸着保持されている前記第1基板と、前記第2保持部に吸着保持されている前記第2基板とを押付け合せることにより接合させ、
接合された前記第1基板のアライメントマークと前記第2基板のアライメントマークとの位置ずれを測定し、
過去の接合において生じた前記位置ずれに基づき、今回の接合における前記水平方向位置合わせを制御する、接合方法。 - 前記第2保持部に保持される前記第2基板に歪みを生じさせ、
過去の接合において生じた前記位置ずれに基づき、今回の接合における前記歪みを制御する、請求項8に記載の接合方法。 - 過去の接合において生じた前記位置ずれと、今回の接合において生じた前記位置ずれとに有意差が有るか否かを統計解析により判定する、請求項8または9に記載の接合方法。
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CN201980008859.8A CN111630627B (zh) | 2018-01-23 | 2019-01-11 | 接合系统和接合方法 |
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US16/964,070 US11817338B2 (en) | 2018-01-23 | 2019-01-11 | Bonding system and bonding method |
CN202411030514.1A CN118762983A (zh) | 2018-01-23 | 2019-01-11 | 接合系统 |
US18/480,745 US20240047257A1 (en) | 2018-01-23 | 2023-10-04 | Bonding system |
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JP7150118B2 (ja) | 2022-10-07 |
TW201933427A (zh) | 2019-08-16 |
TWI823598B (zh) | 2023-11-21 |
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TW202303695A (zh) | 2023-01-16 |
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CN118762983A (zh) | 2024-10-11 |
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EP3742474A4 (en) | 2021-10-13 |
KR102711309B1 (ko) | 2024-09-27 |
JP6952853B2 (ja) | 2021-10-27 |
EP3742474A1 (en) | 2020-11-25 |
JP2020202398A (ja) | 2020-12-17 |
TWI782169B (zh) | 2022-11-01 |
JPWO2019146427A1 (ja) | 2020-07-30 |
EP4250342A2 (en) | 2023-09-27 |
EP3742474B1 (en) | 2024-01-03 |
CN111630627A (zh) | 2020-09-04 |
KR20200108892A (ko) | 2020-09-21 |
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