Mounting device

Abstract

The present invention provides a mounting device capable of solving problems such as weight increase caused by a heater for heating a component to be mounted. A mounting device (21) is provided with: a fixing unit (U1); and a moving unit (U2) held by the fixing unit (U1) so as to be movable in the direction of forward and backward movement with respect to the substrate (102), the fixing unit (U1) having a heating unit (23), the moving unit (U2) having a head part (35) and a shaft body (14) having the head part (35) provided at the tip thereof, the moving unit (U2) being held by the fixing unit (U1) so as to be movable in the direction of forward and backward movement with respect to the substrate (102) in a state in which the moving unit (U2) is retracted with respect to the fixing unit (U1). The head part (35) and / or the shaft body (14) are / is in contact with the heating unit (23) and the head part (35) is heated, and the head part (35) and the shaft body (14) are not in contact with the heating unit (23) in a state in which the moving unit (U2) is advanced relative to the fixed unit (U1) and the component (103) is pressed against the substrate (102).

Description

Technical Field

[0001] This invention relates to a mounting device for mounting parts on a substrate. Background Technology

[0002] Conventionally, as shown in Patent Document 1, components (such as light-emitting diode (LED) chips) are mounted on a substrate via bonding members such as anisotropic conductive film (ACF) or anisotropic conductive paste (ACP) containing conductive particles and thermosetting resin. The mounting apparatus used in this type of mounting includes a mounting unit capable of moving back and forth relative to the substrate on which it is mounted. Furthermore, by applying pressure and heating to the components disposed on the substrate via ACF or the like using a head provided at the front end of the mounting unit, the conductive particles electrically connect the substrate and the components, and the thermosetting resin hardens, thus fixing them together.

[0003] Patent Document 1 has a heater at its head that can be heated by electricity. Furthermore, when pressurizing parts such as ACF mounted on a substrate using a mounting unit, the heater heats the parts, thereby fixing the ACF or the like to the parts.

[0004] Existing technical documents Patent documents Patent Document 1: Japanese Patent Application Publication No. 2017-118147 Summary of the Invention

[0005] The problem that the invention aims to solve On the other hand, if a heater is mounted on the head, the weight of the mounting unit increases. Therefore, in cases where parts need to be mounted with low pressure, mechanisms such as those for eliminating the weight of the mounting unit must be provided to reduce the pressure applied to the parts during mounting, thus complicating the device.

[0006] Furthermore, the configuration allows the head to rotate around its longitudinal axis. Thus, when the mounting unit has an alignment function that aligns the orientation of the part held by the head with the orientation of the substrate before mounting, the allowable rotation angle range of the head is limited by the wiring of the heater provided in the head.

[0007] In view of this, the object of the present invention is to provide an installation device that can solve the conventional problems arising from heaters used to heat parts to be installed.

[0008] Technical means to solve the problem The present invention is an installation apparatus comprising a head for pressing a component onto a substrate and a heating unit for heating the head, characterized in that it comprises: a fixing unit that does not move in a direction of forward or backward movement relative to the substrate and has a Z-axis motor; and a moving unit that is held in the fixing unit in a manner capable of moving in a direction of forward or backward movement relative to the substrate, and moves forward or backward relative to the substrate when the Z-axis motor is driven, the fixing unit having the heating unit, the moving unit having the head and a shaft having the head at its front end, wherein when the moving unit is moved backward relative to the fixing unit, the head and / or the shaft contacts the heating unit and the head is heated, and when the moving unit is moved forward relative to the fixing unit to press the component onto the substrate, the head and the shaft do not contact the heating unit.

[0009] In this type of mounting device, it is preferable that the fixing unit and the moving unit do not include an elastic body that applies force to the head in the direction of moving forward and backward relative to the substrate.

[0010] Alternatively, the moving unit preferably has an θ-axis motor that rotates the shaft about the axis of the shaft.

[0011] Another aspect of the mounting device of the present invention is characterized by comprising: a mounting unit having a head for pressing a substrate member; and a heating unit for heating the head by transferring heat in contact with or without contact with the mounting unit.

[0012] In this type of installation device, the installation unit preferably has a shaft with the head provided at the front end and an θ-axis motor for rotating the shaft about the axis of the shaft.

[0013] In addition, in this type of mounting device, it is preferable that the heating unit has a heat transfer section that contacts the shaft and / or the head to heat the head, while not contacting the shaft and the head when the head presses the part.

[0014] The effects of the invention The mounting device of the present invention has the following structure: a heating unit is provided on the fixed unit, and the heating unit is not provided on the moving unit, which has a head and is movably held in the fixed unit. That is, in the present invention, the weight of the moving unit can be reduced compared with conventional devices that have a heater mounted on the head. In addition, when the mounting device of the present invention has an alignment function, the rotation angle range of the head is not limited by the wiring of the heater as in the past. Attached Figure Description

[0015] [ Figure 1[ ] is a schematic side view showing the mounting unit and heating unit of the mounting device according to the first embodiment of the present invention.

[0016] [ Figure 2 ]yes Figure 1 The front view of the mounting unit and heating unit is shown.

[0017] [ Figure 3 ]yes Figure 2 A modified example of the heating unit shown.

[0018] [ Figure 4 [ ] is a perspective view schematically illustrating a second embodiment of the mounting device of the present invention.

[0019] [ Figure 5 ] indicates in Figure 4 The diagram shows a perspective view of the installation device in which the head is heated by a heating unit. Detailed Implementation

[0020] The following is for reference Figure 1 , Figure 2 The first embodiment of the mounting device of the present invention (mounting device 1) will be described. In the following description, the X direction, Y direction, and Z direction correspond to the directions of arrows X, Y, and Z shown in the accompanying drawings. The X direction is described as the front-back direction, the Y direction as the left-right direction, and the Z direction as the up-down direction. However, these directions are only examples and are not intended to limit the direction of the mounting device of the present invention.

[0021] like Figure 2 As shown, the mounting device 1 is used to mount components 103, such as LED chips, integrated circuit (IC) chips, and chip resistors, onto a substrate 102 on which an ACF 101 is provided on its surface. The mounting device 1 includes a mounting unit 2 and a heating unit 3. Additionally, the mounting device 1 includes a recognition mechanism (not shown) capable of identifying the direction of the substrate 102 around the Z-axis and the direction of the component 103 around the Z-axis. The direction of the substrate 102 or component 103 around the Z-axis can be identified, for example, by providing alignment marks on the substrate 102 or component 103 and by providing a function in the recognition mechanism to determine the direction of the alignment marks through image recognition.

[0022] First, the mounting unit 2 will be described. The mounting unit 2 of this embodiment includes a base 4 for mounting various components constituting the mounting unit 2. The base 4 is mounted on an X-direction moving member (not shown) and a Y-direction moving member, and is capable of moving along the front-back direction and the left-right direction.

[0023] As shown in the figure, a linear motion mechanism 5, a Z-axis motor 6, and a ball screw 7 are mounted on the base 4. The linear motion mechanism 5 includes a track 8 that extends vertically and is fixedly mounted on the base 4, and a slider 9 that is supported on the track 8 and moves vertically. The Z-axis motor 6 is fixedly mounted on the upper part of the base 4 with its rotation axis facing downwards. The ball screw 7 includes a screw shaft 10 that extends vertically and is rotatably held in the base 4 via bearings or the like, and a nut 11 that moves accordingly along the axis of the screw shaft 10 when the screw shaft 10 rotates. Here, the rotation axis of the Z-axis motor 6 is connected to the upper end of the screw shaft 10 via a coupling or the like, so that the screw shaft 10 rotates when the Z-axis motor 6 is driven.

[0024] A housing 12 is mounted on the slider 9 to hold the nut 11. That is, the housing 12 is driven by the nut 11 and supported by the slider 9 to move vertically. Therefore, when the Z-axis motor 6 is rotated, the housing 12 can rise or fall depending on the amount and direction of rotation. Furthermore, the housing 12 of this embodiment has the function of rotatably holding the shaft 14 (described later) and a connector function. The connector function is configured to communicate with a suction passage provided inside the shaft 14 and can be connected to a pump (not shown), enabling the pump to draw air from the suction passage.

[0025] An θ-axis motor 13 is mounted on the housing 12. The θ-axis motor 13 is mounted on the upper part of the housing 12 so that the rotation axis is facing downwards without moving.

[0026] Furthermore, a shaft 14 is mounted on the housing 12. In this embodiment, the shaft 14 is hollow with a circular outer diameter, and has an internal suction passage communicating with a pump (not shown) connected to the housing 12. The shaft 14 is rotatably held in the housing 12 via bearings or the like. Here, the rotating shaft of the θ-axis motor 13 is connected to the upper end of the shaft 14 via a coupling or the like, and when the θ-axis motor 13 is driven, the shaft 14 rotates circumferentially within an unlimited range of 0° to ±360° around the axis O.

[0027] Furthermore, a head 15 is provided at the front end of the shaft 14. In this embodiment, the head 15 is integrally provided with the shaft 14 and moves together with the shaft 14 in the front-back direction, left-right direction, and up-down direction, and rotates about the axis O. In addition, the head 15 is hollow, and by drawing air from the suction passage, the part 103 that contacts the lower end surface of the head 15 can be adsorbed.

[0028] Next, the heating unit 3 will be described. The heating unit 3 is provided separately from the mounting unit 2 and has the function of heating the head 15 by transferring heat from the mounting unit 2. When transferring heat from the heating unit 3 to the mounting unit 2, heat conduction, convection, heat radiation, or electromagnetic induction can be used. Figure 1 , Figure 2 The heating unit 3 shown is an example of heat conduction. Heat from the heating unit 3 is transferred to the shaft 14 through contact with the shaft 14, thereby heating the head 15. This type of heating unit 3 can be implemented, for example, by using a heater that heats by electricity. The heating unit 3 in this embodiment is generally block-shaped and equipped with a heater (not shown), such as... Figure 2 As shown, a heat transfer part 16 is provided on the side of the heating unit 3, which contacts the shaft 14 and transfers heat from the heating unit 3.

[0029] Heating unit 3 can utilize convection, thermal radiation, or electromagnetic induction, such as... Figure 3 The heat is transferred to the mounting unit 2 in a non-contact manner, as shown. Examples of such non-contact heat transfer devices for the mounting unit 2 include hot air heaters that generate hot air, infrared heaters that radiate infrared radiation, and induction heating (IH) heaters. Furthermore, the head 15 can be heated by transferring heat to the shaft 14 non-contactly through hot air from the hot air heater, infrared radiation from the infrared heater, or electromagnetic induction from the IH heater.

[0030] Next, the method for mounting the component 103 onto the substrate 102 on which the ACF 101 is provided by the mounting device 1 will be described. Here, the ACF 101 is temporarily fixed to the substrate 102 in advance. In addition, the substrate 102 on which the ACF 101 is provided is conveyed to the position where the component 103 is to be mounted at predetermined time points. Then, the component 103 is adsorbed by the head 15.

[0031] First, the mounting unit 2 is moved using the X-direction moving component (not shown) and the Y-direction moving component, as follows: Figure 2 As shown, the shaft 14 is brought into contact with the heat transfer section 16 of the heating unit 3. Heat from the heating unit 3 is transferred from the heat transfer section 16 to the head 15 via the shaft 14, thus heating the head 15.

[0032] Subsequently, the mounting unit 2 is moved to directly above the ACF 101 using the X-direction and Y-direction moving components. In this state, the shaft 14 is not in contact with the heat transfer part 16 of the heating unit 3. Furthermore, the identification mechanism identifies the direction of the substrate 102 and the part 103 around the Z-axis, and the direction of the part 103 around the Z-axis is aligned with the direction of the substrate 102 around the Z-axis by driving the θ-axis motor 13. Then, the housing 12 is lowered by driving the Z-axis motor 6, and the part 103 is pressed against the ACF 101. As described above, since the head 15 is heated by the heating unit 3, the heat of the head 15 is also transferred to the ACF 101 via the part 103. Therefore, the substrate 102 and the part 103 can be electrically connected by the conductive particles contained in the ACF 101, and the thermosetting resin is hardened to fix them together.

[0033] Furthermore, in the process described, when the head 15 is heated using the heating unit 3, the part 103 is adsorbed onto the head 15, but the part 103 can also be adsorbed after the head 15 is heated using the heating unit 3.

[0034] Since the mounting unit 2 does not include the heater found in conventional mounting units, its weight can be reduced compared to conventional units. Therefore, in cases where the part 103 needs to be installed under low pressure (e.g., the part 103 is small (for example, the length of the part 103 in the X direction and the length in the Y direction are about 1 mm), or the part 103 is easily damaged by pressure, the mechanism for eliminating the weight of conventional mounting units can be omitted in the mounting unit 2 of this embodiment.

[0035] Furthermore, in conventional mounting units equipped with heaters, when an alignment function is provided to align the part's orientation with the substrate's orientation before mounting, the rotation angle range of the head is limited by the heater wiring. For example, the rotation angle range of a conventional mounting unit equipped with a heater is limited to approximately 60° of circumferential rotation around the rotation axis. In contrast, the mounting unit 2 of this embodiment can rotate freely within a circumferential range of 0° to ±360° around axis O.

[0036] The mounting device of the present invention can also be as follows Figure 4 , Figure 5 The mounting device 21 shown is implemented as described. The mounting device 21 in this embodiment includes a mounting unit 22 and a heating unit 23.

[0037] The mounting unit 22 includes a base 24 for mounting various components constituting the mounting unit 22. In this embodiment, the base 24 includes: a first component 24a extending along the Z direction and mounted on an X-direction moving member and a Y-direction moving member (not shown); a second component 24b extending along the X direction and mounted on the upper end of the first component 24a; a third component 24c having a circular hole extending along the Z direction and mounted on the middle portion of the first component 24a; and a fourth component 24d extending along the X direction and mounted on the lower end of the first component 24a. In this embodiment, the first component 24a, the second component 24b, and the third component 24c are formed from a metallic raw material, such as aluminum, and the fourth component 24d is formed from a heat-insulating raw material (a raw material with low thermal conductivity). Examples of heat-insulating raw materials include raw materials with laminated sheets containing glass fibers or ceramics. The components constituting the base 24, such as the first component 24a, are fixed to each other, for example, by bolts.

[0038] The linear motion mechanism 5, Z-axis motor 6, and ball screw 7 are mounted on the base 24. The structures of the linear motion mechanism 5, Z-axis motor 6, and ball screw 7 included in the mounting unit 22, or the structures of the rail 8 and slider 9 included in the linear motion mechanism 5, and the screw shaft 10 and nut 11 included in the ball screw 7, are the same as those in the mounting unit 2. Therefore, the same reference numerals are used in the drawings, and detailed descriptions are omitted. Furthermore, in the mounting unit 22, the screw shaft 10 is inserted through a hole in the second component 24b and is rotatably supported in the second component 24b. The main purpose of providing the second component 24b is to ensure stable rotation of the screw shaft 10; it can be arbitrarily set according to the length or thickness of the screw shaft 10.

[0039] A housing 32 is mounted on the slider 9 to hold the nut 11. When the Z-axis motor 6 is rotated, the housing 32 can rise or fall depending on the amount and direction of rotation. Furthermore, like the housing 12, the housing 32 has the function of rotatably holding the shaft 14 and a connector function. The connector function is configured to communicate with a suction passage provided inside the shaft 14 and can be connected to a pump (not shown), allowing air to be drawn from the suction passage via the pump.

[0040] The θ-axis motor 13 and the shaft 14 are mounted on the housing 32. As described above, the rotating shaft of the θ-axis motor 13 is connected to the upper end of the shaft 14 via a coupling or the like. In this embodiment, the shaft 14 also rotates around the axis O in an unlimited range of 0° to ±360° in the circumferential direction.

[0041] A head 35 is provided at the front end of the shaft 14. In this embodiment, the head 35 includes an upper part 35a and a lower part 35b. The upper part 35a is a circular plate with a diameter larger than that of the shaft 14, and the lower part 35b has a smaller diameter than that of the upper part 35a, with its lower end tapering downwards. It has an adsorption hole on its lower end face for adsorbing parts (not shown). Furthermore, a passage communicating with a suction passage provided inside the head 35 is provided, allowing air to be drawn from the suction passage, and parts (not shown) can be adsorbed using the adsorption hole on the lower end face of the lower part 35b.

[0042] Furthermore, although the illustration is omitted, the mounting device 21 in this embodiment is provided with a load cell for measuring the force applied to the part when the part adsorbed by the head 35 is mounted on the substrate.

[0043] Furthermore, in this embodiment, the heating unit 23 is formed as a single plate and fixed to the fourth member 24d. The heating unit 23 of this embodiment includes a heater that heats by being energized. The heater is connected to a power source via wiring (not shown), and supplying power to the heater from the power source heats the heating unit 23. Moreover, since the fourth member 24d to which the heating unit 23 is fixed is made of a heat-insulating material, heat from the heating unit 23 is difficult to transfer to the first member 24a.

[0044] Furthermore, a circular through hole 23a is provided on the heating unit 23. As shown, the shaft 14 is inserted through the through hole 23a. In this embodiment, the inner diameter of the through hole 23a is larger than the outer diameter of the shaft 14, and the shaft 14 does not contact the heating unit 23. Additionally, the head 35 provided at the front end of the shaft 14 is located further below the heating unit 23, as shown in the figure. Figure 4 This indicates the state where the Z-axis motor 6 rotates, causing the housing 32 to descend. At this time, the upper surface of the head portion 35a separates from the lower surface of the heating unit 23, and the head 35 is not in contact with the heating unit 23. Additionally, Figure 5 This indicates that the Z-axis motor 6 is rotated in the opposite direction, causing the housing 32 to rise. At this time, the upper surface of the head 35a contacts the lower surface of the heating unit 23, thereby transferring heat from the heating unit 23 to the head 35 and heating the head 35.

[0045] In the mounting device 21 configured as described above, apart from the base 24 and the Z-axis motor 6, the heating unit 23, along with the track 8 and the lead screw 10, also does not move relative to the Z-direction. Here, the group of components that do not move relative to the Z-direction, such as the heating unit 23, the base 24, and the Z-axis motor 6, is referred to as the Z-direction fixed unit U1. On the other hand, apart from the housing 32 and the θ-axis motor 13, the shaft 14 and the head 35 can also move relative to the Z-direction along with the slider 9 and the nut 11. Here, the group of components that can move relative to the Z-direction, such as the shaft 14, the head 35, and the housing 32, is referred to as the Z-direction moving unit U2.

[0046] Furthermore, neither the Z-direction fixing unit U1 nor the Z-direction moving unit U2 is equipped with an elastic body that applies force to the head 35 in the Z-direction from the Z-axis motor 6 to the head 35. That is, the head 35 moves in the Z-direction according to the amount of movement of the housing 32 when it is raised or lowered by the rotation of the Z-axis motor 6.

[0047] By means of the installation device 21 Figure 1 , Figure 2 When mounting component 103 onto substrate 102 including ACF 101, as shown, Figure 5 As shown, the Z-direction moving unit U2 is raised, bringing the head 35 into contact with the heating unit 23. In this state, the head 35 is heated because heat from the heating unit 23 is transferred to it. Furthermore, depending on the type of ACF 101 or part 103, the head 35 can be heated while the part 103 is being held in place, or the head 35 can be heated without holding the part 103 in place, and the heated head 35 can be used to hold the part 103 in place just before mounting it onto the substrate 102.

[0048] Then, the mounting unit 22 is moved to directly above the ACF 101 using the X-direction moving component and the Y-direction moving component. Furthermore, the identification mechanism identifies the direction of the substrate 102 and the part 103 around the Z-axis. Simultaneously, the θ-axis motor 13 is driven to align the part 103 and the substrate 102 around the Z-axis. Then, the Z-axis motor 6 is driven, causing the Z-direction moving unit U2 to descend relative to the Z-direction fixing unit U1. Here, the heating unit 23 is provided in the Z-direction fixing unit U1. That is, the Z-direction moving unit U2 is lighter and has less inertia than the unit with a heater at its head as described in Patent Document 1, thus allowing for responsive movement in the Z-direction direction via the Z-axis motor 6. Furthermore, because the Z-direction moving unit U2 is lightweight, similar to the mounting device 1, the part 103, which requires low-pressure mounting, can be appropriately mounted on the substrate 102 in the mounting device 21 without a mechanism to eliminate the weight of the Z-direction moving unit U2. Furthermore, since the mounting device 21 does not provide elastic bodies that apply force to the head 35 in the Z direction on the Z-direction fixing unit U1 and the Z-direction moving unit U2, the head 35 can be moved with good accuracy in the Z direction. That is, when mounting the part 103 on the substrate 102, the head 35 can be moved in the Z direction as planned while the load sensor monitors the force applied to the part 103 adsorbed by the head 35, so that parts 103 that need to be mounted with low pressure can be mounted more appropriately.

[0049] The present invention has been described above as an embodiment, but the present invention is not limited to this specific embodiment. Various modifications and alterations can be made within the scope of the spirit of the invention as set forth in the claims, unless otherwise specified in the description. For example, the structure of the embodiment can be appropriately added to or deleted from; furthermore, the structure of an embodiment can be provided in other embodiments. Furthermore, the effects described in the embodiments are merely illustrative of effects produced according to the present invention and do not imply that the effects based on the present invention are limited to those described.

[0050] For example, the head 15 and head 35 in this embodiment have the function of adsorbing the part 103, but the head 15 and head 35 without adsorption function are also included in this invention. Furthermore, the part of the mounting unit 2 heated by the heating unit 3 can be a part other than the shaft 14, or the head 15 can be heated directly by the heating unit 3, or both the shaft 14 and the head 15 can be heated simultaneously. Additionally, the heat transfer part 16 can, for example, make linear contact with the planar and circular shaft 14, or it can have a semi-circular recess and make surface contact with the shaft 14 through the recess. Furthermore, the heating unit 3 can contact the shaft 14 on one side in the left-right direction as shown in the figure, or it can be configured to clamp the shaft 14 with a pair of members that can open and close in the left-right direction, and contact the shaft 14 on both sides in the left-right direction.

[0051] Furthermore, when heating the head 35 using the heating unit 23, it is not limited to the case where the head 35 is in contact with the heating unit 23. A structure can also be adopted where the shaft 14 is in contact with the heating unit 23, and the head 35 is heated via the shaft 14. On the other hand, when mounting the part 103 using the head 35, the shaft 14 is not in contact with the heating unit 23 (for example, as in a variation of the heating unit 3, the heating unit 23 is configured to open and close relative to the shaft 14 in the left-right direction; when heating the head 35, the heating unit 23 clamps the shaft 14; when mounting the part 103 using the head 35, the head 35 opens left and right, and the shaft 14 is not in contact with the heating unit 23). Alternatively, when heating the head 35, both the head 35 and the shaft 14 can be in contact with the heating unit 23.

[0052] Explanation of icon numbers 1.21: Installation device 2.22: Installation Unit 3, 23: Heating unit 13: Theta-axis motor 14: Shaft 15, 35: Head 16: Heat Transfer Section 102: Substrate 103: Parts O: Axis U1: Fixed element in the Z direction (fixed element) U2: Z-direction moving unit (moving unit)

Claims

1. A mounting apparatus comprising a head for pressing a substrate member and a heating unit for heating the head, the mounting apparatus comprising: The fixed unit does not move in the direction of forward and backward movement relative to the substrate and has a Z-axis motor; as well as The moving unit is held in the fixed unit in a manner that allows it to move forward and backward relative to the substrate, and moves forward and backward relative to the substrate when the Z-axis motor is driven. The fixing unit includes the heating unit. The moving unit has the head and a shaft with the head disposed at the front end. When the moving unit is retracted relative to the fixed unit, the head and / or the shaft comes into contact with the heating unit, and the head is heated. When the moving unit advances relative to the fixed unit and presses the part against the substrate, the head and the shaft do not contact the heating unit.

2. The installation device according to claim 1, wherein, The fixing unit and the moving unit do not include an elastic body that applies force to the head in the direction of moving forward or backward relative to the substrate.

3. The installation device according to claim 1, wherein, The moving unit has an θ-axis motor that rotates the shaft about the axis of the shaft.

Images