WO2024252771A1 - 実装装置および実装装置が備えるボンディングヘッドの変位検出方法 - Google Patents
実装装置および実装装置が備えるボンディングヘッドの変位検出方法 Download PDFInfo
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- WO2024252771A1 WO2024252771A1 PCT/JP2024/013726 JP2024013726W WO2024252771A1 WO 2024252771 A1 WO2024252771 A1 WO 2024252771A1 JP 2024013726 W JP2024013726 W JP 2024013726W WO 2024252771 A1 WO2024252771 A1 WO 2024252771A1
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- bonding head
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/071—Connecting or disconnecting
- H10W72/0711—Apparatus therefor
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/071—Connecting or disconnecting
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/071—Connecting or disconnecting
- H10W72/073—Connecting or disconnecting of die-attach connectors
Definitions
- the present invention relates to a mounting device and a method for detecting the displacement of a bonding head provided in the mounting device.
- the bonding head is rotated via a link mechanism or gear train, so the output shaft of the actuator and the rotation shaft of the bonding head do not coincide.
- the drive mechanism that moves the bonding head linearly and the drive mechanism that rotates it may be structured hierarchically so that they are stacked on top of each other relative to the bonding head. For this reason, when attempting to calculate the amount of rotation of the bonding head by detecting the amount of rotation of the actuator's output shaft, it is not always possible to obtain an accurate value due to factors such as play in the power transmission mechanism and accumulated errors due to the hierarchical structure.
- the present invention was made to solve these problems, and provides a mounting device etc. that can accurately detect the amount of displacement of the bonding head in the forward and backward directions and in the rotational direction.
- the mounting device includes a bonding head having a cylindrical side surface, a support member that supports the bonding head so that the bonding head can be advanced and retreated in an axial direction along a central axis of the cylindrical side surface and can rotate around the central axis, a first actuator that moves the bonding head forward and backward in the axial direction, a second actuator that has an output axis that does not coincide with the central axis and rotates the bonding head around the axis, a first scale provided on the cylindrical side surface for detecting the displacement of the bonding head in the axial direction, a second scale provided on the cylindrical side surface for detecting the displacement of the bonding head around the axis, a first sensor head that reads the first scale and outputs a first detection signal corresponding to the displacement of the bonding head in the axial direction, and a second sensor head supported by the support member that reads the second scale and outputs a second detection signal corresponding to the displacement of the bonding head around the axi
- the displacement detection method is a method for detecting displacement of a bonding head provided in a mounting device, and includes a second output step in which, when the bonding head having a cylindrical side surface is displaced around the central axis of the cylindrical side surface relative to a support member supporting the bonding head using a second actuator having an output axis that does not coincide with the central axis, a second sensor head supported by the support member reads a second scale provided on the cylindrical side surface and outputs a second detection signal corresponding to the displacement of the bonding head around the axis, and a first output step in which, when the bonding head is displaced in the axial direction along the central axis relative to the support member using a first actuator, a first sensor head reads a first scale provided on the cylindrical side surface and outputs a first detection signal corresponding to the displacement of the bonding head in the axial direction.
- the present invention provides a mounting device that can accurately detect the amount of displacement of the bonding head in the forward and backward directions and in the rotational direction.
- FIG. 1 is a perspective view showing a schematic view of a main part of a flip chip bonder according to an embodiment of the present invention
- FIG. 1 is a system configuration diagram of a flip chip bonder.
- FIG. 2 is a perspective view showing a bonding head and two sensor heads.
- FIG. 2 is a diagram illustrating a scale film.
- FIG. 11 is a flow chart for explaining a processing procedure of a calculation processing unit when the bonding head is directly displaced.
- FIG. 1 is a perspective view showing a schematic of the main part of a flip chip bonder 100 according to this embodiment.
- the flip chip bonder 100 is an example of a mounting device incorporating a position control device, and is a bonding device that mounts a semiconductor chip 310 having electrodes formed on one side to electrodes on a substrate 330.
- the perspective view of the flip chip bonder 100 shown in FIG. 1 is a diagram showing only a limited and schematic view of elements related to position control when the bonding head 110 is directly displaced, and does not show all of the components necessary for the flip chip bonder 100 to perform its functions.
- the mounting device is not limited to a flip chip bonder, and may be a die bonder that places and bonds a semiconductor chip to a die pad of a lead frame.
- the flip chip bonder 100 mainly includes a bonding head 110, a holder base 120, a linear motion mechanism 130, a rotation mechanism 140, a holder block 150, and a sensor plate 160.
- the bonding head 110 adsorbs a semiconductor chip 310 to its tip, places it on a mounting area 320 of a substrate 330 placed on a stage 220, and bonds it by applying pressure and heat.
- the bonding head 110 in this embodiment has an overall cylindrical shape, and the central axis A c of the cylindrical side surface is parallel to the Z axis as shown in the figure.
- the Z axis direction is the vertical direction (height direction), and the X axis direction and the Y axis direction are planar directions, and are set to be perpendicular to each other as shown in the figure.
- the holder base 120 is a support member that supports the bonding head 110 via the holder block 150.
- the holder base 120 also directly or indirectly supports the linear motion mechanism 130 and the rotation mechanism 140.
- the holder base 120 can be moved in its entirety in the vertical and horizontal directions in the space above the stage 220 as shown by the white arrows in FIG. 1 by driving a holder actuator not shown in FIG. 1. By controlling the movement of the entirety in this way, the holder base 120 can move the bonding head 110, which has adsorbed the semiconductor chip 310 by the chip supply device, to the top of the mounting area 320 on which it is to be placed, for example. It is desirable that the bonding head 110 remain stationary relative to the holder base 120 during the movement of the entire holder base 120.
- the linear motion mechanism 130 is a micro-movement mechanism for moving the bonding head 110 forward and backward in a set range of very small distances (e.g., ⁇ 0.5 mm from a reference position) in an axial direction along the central axis A c (z direction indicated by the arrow in the figure).
- the linear motion mechanism 130 includes a first actuator 131, e.g., a motor, and a transmission mechanism for transmitting the output of the first actuator 131.
- the transmission mechanism is configured, for example, by a gear train including a rack and a pinion gear.
- the rotation mechanism 140 is a rotation fine movement mechanism for rotating the bonding head 110 around the central axis A c (in the ⁇ direction indicated by the arrow in the figure) within a set range of small angles (for example, ⁇ 5 degrees with respect to a reference angle).
- the rotation mechanism 140 includes a second actuator 141, which is, for example, a motor, and a transmission mechanism for transmitting the output of the second actuator 141.
- the transmission mechanism is, for example, composed of a lever crank mechanism and a gear train.
- first actuator 131 and the second actuator 141 may be actuators that drive the bonding head 110 in the axial direction or around the axis by a voice coil motor, an air cylinder, a hydraulic cylinder, a linear motor, or the like that does not include a transmission mechanism.
- the holder block 150 is attached to the holder base 120 and is a guide member that supports and guides the bonding head 110 so that the bonding head 110 can advance and retreat in the axial direction along the central axis A c and rotate around the central axis A c .
- the holder block 150 may be formed integrally with the holder base 120.
- the holder block 150 has an opening window 151 for exposing a part of the cylindrical side surface of the bonding head 110 to the outside.
- the opening window 151 has a shape surrounded by a rectangular frame in FIG. 1, but may have any shape as long as the holder block 150 maintains the function of supporting and guiding the bonding head 110.
- the sensor plate 160 is a plate-like member that is installed on the holder block 150 so as to face the cylindrical side surface of the bonding head 110 and cover at least a portion of the opening window 151.
- the sensor plate 160 supports the first sensor head 161 and the second sensor head 162 so that their sensing parts face the cylindrical side surface of the bonding head 110.
- the first sensor head 161 outputs a first detection signal corresponding to the displacement of the bonding head 110 in the axial direction (advance/retract direction).
- the second sensor head 162 outputs a second detection signal corresponding to the displacement of the bonding head 110 around the axis (rotation direction).
- the first sensor head 161 and the second sensor head 162 are supported by the sensor plate 160 so as to protrude toward the inside of the opening window 151.
- the displacement calculation unit described below can calculate the amount of axial displacement and the amount of displacement around the axis of the bonding head 110 relative to the holder base 120. In other words, it can be said that the first sensor head 161 and the second sensor head 162 are essentially supported by the holder base 120.
- FIG. 2 is a system configuration diagram of the flip chip bonder 100.
- the control system of the flip chip bonder 100 is mainly composed of an arithmetic processing unit 170, a holder actuator 121, a first actuator 131, a second actuator 141, a first sensor head 161, and a second sensor head 162.
- the arithmetic processing unit 170 is a processor (CPU: Central Processing Unit) that controls the flip chip bonder 100 and executes programs.
- the processor may be configured to work in conjunction with an arithmetic processing chip such as an ASIC (Application Specific Integrated Circuit) or a GPU (Graphics Processing Unit).
- ASIC Application Specific Integrated Circuit
- GPU Graphics Processing Unit
- the arithmetic processing unit 170 also plays a role as a functional arithmetic unit that executes various calculations according to the processing instructed by the position control program. Specifically, the arithmetic processing unit 170 can function as a displacement calculation unit 171 and a drive control unit 172.
- the displacement calculation unit 171 receives a first detection signal output by the first sensor head 161 and processes the first detection signal to calculate the amount of displacement in the axial direction (advance/retreat direction) of the bonding head 110 relative to the holder base 120.
- the displacement calculation unit 171 also receives a second detection signal output by the second sensor head 162 and processes the second detection signal to calculate the amount of displacement around the axis (rotation direction) of the bonding head 110 relative to the holder base 120.
- the displacement calculation unit 171 also receives a position detection signal from a position sensor (not shown) and processes the position detection signal to calculate the three-dimensional coordinates of the holder base 120 at the reference position.
- the drive control unit 172 determines the target amount of movement by which the semiconductor chip 310 should be displaced in order to reach the mounting area 320 on which the semiconductor chip 310 is to be placed, and also determines the target amount of rotation by which the semiconductor chip 310 should be displaced in order to place the semiconductor chip 310 in the correct posture in the mounting area 320.
- the drive control unit 172 then adjusts the semiconductor chip 310 to the target posture by sending a drive signal to the second actuator 141 while successively comparing the target amount of rotation with the amount of displacement around the axis calculated by the displacement calculation unit 171.
- the drive control unit 172 then sends a drive signal to the first actuator 131 while successively comparing the target amount of movement with the amount of displacement in the axial direction calculated by the displacement calculation unit 171, thereby placing the semiconductor chip 310 at the target position in the mounting area 320.
- the drive control unit 172 also determines the target movement position of the holder base 120.
- the drive control unit 172 then transmits a drive signal to the holder actuator 121 while successively comparing the movement target position with the three-dimensional coordinates of the holder base 120 calculated by the displacement calculation unit 171, thereby causing the holder base 120 to reach the movement target position.
- Figure 3 is a perspective view that shows a schematic of the bonding head 110 and two sensor heads (first sensor head 161, second sensor head 162). Note that in Figure 3, the two sensor heads are drawn farther apart than they actually are, and the sensor plate 160 that supports them is omitted, so that the relationship between each of them and the opposing scale film 113 can be easily understood.
- the first sensor head 161 paired with the first scale 113a drawn on the opposing scale film 113, constitutes a z-axis encoder that detects the amount of displacement in the axial direction (advance/retract direction) of the central axis Ac of the bonding head 110.
- the z-axis encoder is a reflective linear encoder that receives the reflected light that is projected from the first sensor head 161 and reflected by the first scale 113a with a photodiode and outputs a first detection signal that is generated based on the intensity of the reflected light and corresponds to the displacement in the axial direction.
- the second sensor head 162 in pair with the second scale 113b drawn on the opposing scale film 113, constitutes a ⁇ -axis encoder that detects the amount of displacement around the central axis A c of the bonding head 110 (in the direction of rotation).
- the ⁇ -axis encoder is a reflective linear encoder that receives the light projected from the second sensor head 162 and reflected by the second scale 113b with a photodiode and outputs a second detection signal corresponding to the displacement around the axis, which is generated based on the intensity of the light.
- both the z-axis encoder and the ⁇ -axis encoder employ such a reflective linear encoder, but any type of sensor may be employed as long as it is a displacement sensor that outputs a detection signal corresponding to the displacement by opposing the scale and the sensor head.
- a magnetic encoder may be used in which the scale is composed of a magnet and the change is detected by a magnetic sensor provided in the sensor head.
- At least a part of the side surface of the bonding head 110 is constituted by a cylindrical side surface 110a formed by an arc equidistant from the central axis A c .
- the scale film 113 may be directly attached to this cylindrical side surface 110a, but in this embodiment, in consideration of ease of attachment, it is indirectly attached via a scale block 112.
- the scale block 112 has an outer surface 112a which becomes an arcuate surface equidistant from the central axis A c when attached to the bonding head 110 and which substantially becomes the cylindrical side surface of the bonding head 110.
- the scale film 113 is affixed to this outer surface 112a. Therefore, when the scale block 112 is attached to the bonding head 110, the scale film 113 affixed to the outer surface 112a is substantially provided on the cylindrical side surface of the bonding head 110.
- the first sensor head 161 can directly detect the displacement of the bonding head 110 in the forward/backward direction by reading the change in the first scale 113a
- the second sensor head 162 can directly detect the displacement of the bonding head 110 in the rotational direction by reading the change in the second scale 113b.
- the bonding head 110 does not have a cylindrical side surface, or even if it has a cylindrical side surface but the scale block 112 is not attached to the cylindrical side surface, if the outer surface 112a of the scale block 112 attached to the bonding head 110 is an arcuate surface equidistant from the central axis A c , which is the rotation axis of the bonding head 110, the bonding head 110 will essentially have a cylindrical side surface, and it is sufficient that the scale film 113 is attached to the outer surface 112a.
- the bonding head In a mounting device, it is difficult to directly rotate the bonding head by aligning the output axis of the actuator for rotation (the second actuator 141 in this embodiment) with the central axis of the bonding head.
- the bonding head is often rotated by combining an actuator having an output axis that does not coincide with the central axis A c of the bonding head and a transmission mechanism for transmitting the output of the actuator.
- the rotation amount of the output axis of the actuator is detected by a rotary encoder and the rotation amount of the bonding head is calculated using a conversion formula.
- both the first sensor head 161 and the second sensor head 162 are supported by the holder base 120 without a drive mechanism between them, and both the first scale 113a and the second scale 113b are attached to the cylindrical side surface of the bonding head 110. Therefore, the axial displacement and the axial displacement of the bonding head 110 can be directly detected, and the respective displacement amounts can be obtained more accurately than in conventional mounting devices.
- the displacement calculation unit 171 calculates the axial displacement amount and the axial displacement amount based on the first detection signal and the second detection signal, but the axial velocity and the axial angular velocity of the bonding head 110 may be calculated by observing the change in each detection signal per short period of time.
- the fourth is a diagram showing a schematic diagram of the scale film 113.
- the first scale 113a and the second scale 113b are drawn adjacent to each other on one film.
- the first scale 113a is a scale for detecting the axial displacement of the bonding head 110, and therefore a number of first line segments having a length L1 perpendicular to the axial direction (advance/retract direction) are arranged according to the set resolution and the displacement width W1 in the advance/retract direction.
- the displacement width W1 is 1.0 mm if the displacement is ⁇ 0.5 mm with respect to the reference position.
- the second scale 113b is a scale for detecting the displacement around the axis of the bonding head 110
- second line segments of length L2 perpendicular to the axis (rotation direction) are arranged in a number corresponding to the set resolution and the displacement width W2 in the rotation direction. If the radius of curvature of the outer surface 112a to which the scale film 113 is attached is, for example, 8 mm, and the rotation angle is, for example, ⁇ 5 degrees with respect to the reference angle as described above, the displacement width W2 is 2 ⁇ 8 ⁇ 10/360 mm.
- the length L2 of the second line segment needs to be equal to or greater than the displacement width W1 .
- the length L1 of the first line segment needs to be equal to or greater than the displacement width W2 .
- the length L1 of each of the multiple first line segments is equal to the spacing W2 between the line segments at both ends of the multiple second line segments
- the length L2 of each of the multiple second line segments is equal to the spacing W1 between the line segments at both ends of the multiple first line segments.
- the first scale 113a and the second scale 113b are arranged side by side on one film in order to draw the first line segment and the second line segment so as to be perpendicular to each other with high accuracy, but the arrangement of the first scale 113a and the second scale 113b is not limited to this example.
- the first scale 113a and the second scale 113b may be formed separately and attached to the outer surface 112a or the cylindrical side surface 110a with their orientations adjusted.
- the first scale 113a and the second scale 113b may be installed separately so as to face the respective sensor head positions.
- FIG. 5 is a flow diagram explaining the processing procedure. The illustrated flow starts from the point when the bonding head 110 is moved to the top of the mounting area 320 to be placed by the overall movement control, and the target amount of advance/retraction and rotation of the bonding head 110 thereafter is determined.
- step S101 the drive control unit 172 sends a drive signal to the second actuator 141 to rotate the bonding head 110.
- the displacement calculation unit 171 acquires the second detection signal output by the second sensor head 162 after reading the second scale 113b, and in step S103, calculates the amount of displacement around the axis from the second detection signal.
- step S104 the displacement calculation unit 171 determines whether the calculated displacement amount has reached the determined rotation target amount. If it has determined that it has not reached the target amount, the process returns to step S101. If it has determined that it has reached the target amount, the process causes the drive control unit 172 to stop sending a drive signal to the second actuator 141, and the process proceeds to step S105.
- step S105 the drive control unit 172 sends a drive signal to the first actuator 131 to move the bonding head 110 forward and backward.
- step S106 the displacement calculation unit 171 acquires the first detection signal output by the first sensor head 161 after reading the first scale 113a, and in step S107 calculates the amount of displacement in the axial direction from the first detection signal.
- step S108 the displacement calculation unit 171 determines whether the calculated displacement amount has reached the determined target amount of movement. If it has determined that it has not reached the target amount, the process returns to step S105. If it has determined that it has reached the target amount, the drive control unit 172 stops sending a drive signal to the first actuator 131, and the process of placing the semiconductor chip 310 in the mounting area 320 that is the placement target is terminated.
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Abstract
Description
Claims (5)
- 円筒側面を有するボンディングヘッドと、
前記ボンディングヘッドを、前記円筒側面における中心軸に沿う軸方向に進退可能であると共に前記中心軸の軸周りに回動可能であるように支持する支持部材と、
前記ボンディングヘッドを前記軸方向に進退させる第1アクチュエータと、
前記中心軸とは一致しない出力軸を有し、前記ボンディングヘッドを前記軸周りに回動させる第2アクチュエータと、
前記ボンディングヘッドの前記軸方向の変位を検出するための、前記円筒側面に設けられた第1スケールと、
前記ボンディングヘッドの前記軸周りの変位を検出するための、前記円筒側面に設けられた第2スケールと、
前記第1スケールを読取り、前記ボンディングヘッドの前記軸方向の変位に応じた第1検出信号を出力する第1センサヘッドと、
前記第2スケールを読取り、前記ボンディングヘッドの前記軸周りの変位に応じた第2検出信号を出力する、前記支持部材に支持された第2センサヘッドと
を備える実装装置。 - 前記第1スケールと前記第2スケールは、前記円筒側面において隣接して配置されている請求項1に記載の実装装置。
- 前記第1スケールは、複数の第1線分によって形成されており、
前記第2スケールは、複数の第2線分によって形成されており、
前記複数の第1線分のそれぞれの長さは、前記複数の第2線分のうちの両端の線分の間隔に等しく、前記複数の第2線分のそれぞれの長さは、前記複数の第1線分のうちの両端の線分の間隔に等しい請求項2に記載の実装装置。 - 前記第1スケールと前記第2スケールは、一体的に成形されて前記円筒側面に装着されている請求項2または3に記載の実装装置。
- 実装装置が備えるボンディングヘッドの変位検出方法であって、
円筒側面を有する前記ボンディングヘッドを、前記ボンディングヘッドを支持する支持部材に対して、前記円筒側面における中心軸の軸周りに前記中心軸とは一致しない出力軸を有する第2アクチュエータを用いて変位させた場合に、前記支持部材に支持された第2センサヘッドが、前記円筒側面に設けられた第2スケールを読み取って、前記ボンディングヘッドの前記軸周りの変位に応じた第2検出信号を出力する第2出力ステップと、
前記ボンディングヘッドを、前記支持部材に対して、前記中心軸に沿う軸方向へ第1アクチュエータを用いて変位させた場合に、第1センサヘッドが、前記円筒側面に設けられた第1スケールを読み取って、前記ボンディングヘッドの前記軸方向の変位に応じた第1検出信号を出力する第1出力ステップと
を有する変位検出方法。
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| CN202480037799.3A CN121264201A (zh) | 2023-06-09 | 2024-04-03 | 安装装置及安装装置所包括的接合头的位移检测方法 |
| KR1020257040459A KR20260007247A (ko) | 2023-06-09 | 2024-04-03 | 실장 장치 및 실장 장치가 갖추는 본딩 헤드의 변위 검출 방법 |
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| WO2019008674A1 (ja) * | 2017-07-04 | 2019-01-10 | 株式会社Fuji | 部品実装装置 |
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| US8256103B2 (en) * | 2010-03-05 | 2012-09-04 | Asm Assembly Automation Ltd | Actuator for maintaining alignment of die detachment tools |
| JP2014036068A (ja) | 2012-08-08 | 2014-02-24 | Shinkawa Ltd | ダイボンダおよびボンディングツールの位置検出方法 |
| TWI567011B (zh) * | 2016-06-15 | 2017-01-21 | 萬潤科技股份有限公司 | Method and device for conveying the components of the bonding process |
| TWI684235B (zh) * | 2017-07-12 | 2020-02-01 | 日商新川股份有限公司 | 相對於第二物體來定位第一物體的裝置和方法 |
| CN114981938B (zh) * | 2020-12-14 | 2025-11-07 | 雅马哈智能机器株式会社 | 半导体装置的制造装置及制造方法 |
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| JP2003319633A (ja) * | 2002-04-23 | 2003-11-07 | Matsushita Electric Ind Co Ltd | ボイスコイル型モータおよび作業ヘッド |
| WO2019008674A1 (ja) * | 2017-07-04 | 2019-01-10 | 株式会社Fuji | 部品実装装置 |
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