A needle seat structure for a die bonder

Abstract

This utility model relates to the field of die bonder technology and discloses a pin holder structure for a die bonder, including a first support base. A limiting cylinder is welded to the top of the first support base. A first circular hole is opened in the middle of the first support base. An annular limiting groove is opened on the inner wall of the first circular hole. By setting the first support base as the main load-bearing structure, the limiting cylinder welded to the top is used to constrain the movement trajectory. The first circular hole is opened in the center, and the annular limiting groove is designed on the inner wall of the hole to provide installation space for the spring reset system. By setting a trapezoidal ring plate, which is nested in the annular limiting groove, it plays a supporting and guiding role. By setting a reset spring, the bottom end is fixed to the trapezoidal ring plate, and the top end is connected to the top plate to provide the pin rebound force. By setting a threaded tube and a support base plate, the threaded tube above the top plate is threadedly connected to the support base plate to realize the installation and height fine adjustment of the pin, which can adapt to wafers of different thicknesses.

Description

Technical Field

[0001] This utility model relates to the field of die bonder technology, specifically to a pin holder structure for a die bonder. Background Technology

[0002] In the field of semiconductor packaging, die bonders are used to achieve precise bonding between chips and substrates. Their core component, the ejector pin holder, needs to eject the chip from the tray. As the size of semiconductor chips continues to increase and the thickness continues to decrease, higher requirements are placed on the number, position, and height adjustment accuracy of the ejector pin holder.

[0003] However, existing ejector pin holder structures generally suffer from the following problems: firstly, height adjustment is inconvenient, making precise height fine-tuning impossible for wafers of different thicknesses; secondly, ejector pin replacement and disassembly are difficult, hindering the rapid replacement of ejector pin arrays of different sizes or numbers; and thirdly, they lack impact buffering, potentially causing hard damage to the chip during ejection. Therefore, this invention aims to solve the above problems by providing a die bonder ejector pin holder structure that enables rapid ejector pin installation and height fine-tuning, and possesses impact buffering functionality. Utility Model Content

[0004] The purpose of this invention is to provide a pin holder structure for a die bonder to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pin holder structure for a die bonder, comprising a first support base,

[0006] A limiting cylinder is welded to the top of the first support base, and a first circular hole is opened in the middle of the first support base. An annular limiting groove is opened on the inner wall of the first circular hole.

[0007] Furthermore, a trapezoidal ring plate is provided in the middle of the annular limiting groove, a return spring is fixedly connected to the top of the trapezoidal ring plate, and a top plate is fixedly connected to the top of the return spring.

[0008] Furthermore, a threaded tube is fixedly connected to the top of the top plate, a supporting base plate is threadedly connected to the middle of the threaded tube, and a pin is fixedly connected to the top of the supporting base plate.

[0009] Furthermore, the top outer side of the support base plate is provided with several grooves.

[0010] Furthermore, the lower end of the first support base is fixedly connected to a second support base by bolts. The second support base has a second circular hole in the middle, and the inner diameter of the second circular hole is the same as the inner diameter of the first circular hole.

[0011] Furthermore, a one-way cylinder is fixedly connected to the bottom end of the second support base, and L-shaped mounting plates are provided on the left and right sides of the one-way cylinder, with the top end of the L-shaped mounting plates fixedly connected to the bottom end of the second support base.

[0012] Furthermore, a piston cylinder is fixedly connected to the output end of the one-way cylinder. The piston cylinder extends upward and passes through the interior of the first support base, the second support base, and the return spring. A piston rod is slidably connected up and down inside the piston cylinder, and a rubber pad is fixedly connected to the top end of the piston rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] A first support base serves as the main load-bearing structure, with a limiting cylinder welded to the top to constrain the movement trajectory. A first circular hole is opened in the center, and an annular limiting groove is designed on the inner wall of the hole to provide installation space for the spring reset system. A trapezoidal ring plate is set, nested in the annular limiting groove, to provide support and guidance. A reset spring is set, with its bottom end fixed to the trapezoidal ring plate and its top end connected to the top plate, providing the ejector pin's rebound force. A threaded tube and a support base plate are set, with a threaded tube on the top plate threadedly connected to the support base plate, to achieve the installation and height fine adjustment of the ejector pin, adapting to wafers of different thicknesses. A second support base and a first support base are set, with the two bases connected by separate bolts, facilitating disassembly and replacement of the cylinder or spring, making maintenance convenient and cost-effective. A rubber pad is set to absorb the impact force of the cylinder, reducing hard damage to the wafer by the ejector pin and reducing noise during impact. A one-way cylinder is set, and the one-way cylinder + spring reset reduces energy consumption and avoids continuous air pressure consumption. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the front structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the right-side cross-sectional structure of this utility model.

[0019] In the diagram: 1. First support base; 2. Limiting cylinder; 3. Annular limiting groove; 4. Trapezoidal ring plate; 5. Return spring; 6. Top plate; 7. Threaded tube; 8. Support base plate; 9. Ejector pin; 10. Second support base; 11. First circular hole; 12. Second circular hole; 13. One-way cylinder; 14. L-shaped mounting plate; 15. Piston cylinder; 16. Piston rod; 17. Rubber pad; 18. Groove. Detailed Implementation

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-3This utility model provides a technical solution for a die bonder pin holder structure: a die bonder pin holder structure, including a first support base 1, which serves as the main load-bearing structure. A limiting cylinder 2 is welded to the top to constrain the movement trajectory. A first circular hole 11 is opened in the center, and an annular limiting groove 3 is designed on the inner wall of the hole to provide installation space for the spring reset system. The limiting cylinder 2 is welded to the top of the first support base 1. The first circular hole 11 is opened in the middle of the first support base 1. An annular limiting groove 3 is opened on the inner wall of the first circular hole 11. A trapezoidal ring plate 4 is set in the middle of the annular limiting groove 3. By setting the trapezoidal ring plate 4, the trapezoidal ring plate 4 is nested in the annular limiting groove 3, playing a supporting and guiding role. The top of the trapezoidal ring plate 4 is fixedly connected to... A reset spring 5 is provided. The bottom end of the reset spring 5 is fixed to the trapezoidal ring plate 4, and the top end is connected to the top plate 6 to provide the rebound force of the ejector pin 9. The top end of the reset spring 5 is fixedly connected to the top plate 6, and the top end of the top plate 6 is fixedly connected to the threaded tube 7. By setting the threaded tube 7 and the support base plate 8, the threaded tube 7 is set above the top plate 6 and threadedly connected to the support base plate 8 to realize the installation and height fine adjustment of the ejector pin 9 to adapt to wafers of different thicknesses. The middle thread of the threaded tube 7 is connected to the support base plate 8, and the top end of the support base plate 8 is fixedly connected to the ejector pin 9. Several grooves 18 are opened on the outer side of the top end of the support base plate 8. These grooves 18 can cooperate with the anti-rotation pins on the external die bonding equipment to prevent the support base plate 8 from rotating when adjusting the height by thread, so as to ensure the positioning accuracy of the ejector pin 9 array.

[0024] The lower end of the first support base 1 is fixedly connected to the second support base 10 by bolts. By setting the second support base 10 and the first support base 1, the two bases are connected separately by bolts, facilitating disassembly and replacement of the cylinder or spring, making maintenance convenient and cost-effective. The second support base 10 has a second circular hole 12 in the middle, the inner diameter of which is the same as the inner diameter of the first circular hole 11. A one-way cylinder 13 is fixedly connected to the bottom end of the second support base 10. By setting the one-way cylinder 13, the one-way cylinder 13 + spring reset reduces energy consumption and avoids continuous air pressure consumption. L-shaped mounting plates 14 are provided on the left and right sides of cylinder 13. The top of the L-shaped mounting plates 14 is fixedly connected to the bottom of the second support base 10. A piston cylinder 15 is fixedly connected to the output end of the one-way cylinder 13. The piston cylinder 15 extends upward and passes through the interior of the first support base 1, the second support base 10 and the return spring 5. A piston rod 16 is slidably connected up and down inside the piston cylinder 15. A rubber pad 17 is fixedly connected to the top of the piston rod 16. By setting the rubber pad 17, the impact force of the cylinder is absorbed, the hard damage of the ejector pin 9 to the wafer is reduced, and the noise generated during the impact is reduced.

[0025] One-way cylinder 13 is connected to an external air source and an electromagnetic control valve through an air circuit. The electromagnetic control valve is electrically controlled by the main control system of the die bonder. When lifting is required, the electromagnetic control valve supplies air to the one-way cylinder 13 to extend it. When resetting is required, the electromagnetic control valve depressurizes, and the cylinder automatically retracts under the thrust of the reset spring 5. This design avoids continuous air pressure consumption and reduces energy consumption.

[0026] In this utility model, the limiting cylinder 2 is vertically welded to the top of the first support base 1 to ensure that the first circular hole 11 is coaxial with the limiting cylinder. The trapezoidal ring plate 4 is embedded into the annular limiting groove 3. The reset spring 5 is installed and the top plate 6 is fixed. The threaded tube 7 is screwed into the support base plate 8. The initial height of the ejector pin 9 is controlled by adjusting the thread depth. The ejector pin 9 is vertically fixed to the center of the support base plate 8. The groove 18 cooperates with the external anti-rotation pin. The second support base 10 is fastened to the bottom of the first support base 1 with bolts. The two circular holes 11 and 12 are aligned. The one-way cylinder 13 is fixed to the bottom surface of the second support base 10 through the L-shaped mounting plate 14. The piston cylinder 15 is inserted into the circular hole of the double base and passes through the reset spring 5. The rubber pad 17 at the top of the piston rod 16 is aligned with the top plate 6.

[0027] Workflow:

[0028] First, the limiting cylinder 2 is vertically welded to the top of the first support base 1, ensuring that the first circular hole 11 is coaxial with the limiting cylinder 2. The trapezoidal ring plate 4 is embedded in the annular limiting groove 3 on the inner wall of the first circular hole 11. The trapezoidal ring plate 4 serves as a support and guide. The return spring 5 is placed inside the first circular hole 11, with its bottom end abutting against the trapezoidal ring plate 4 and its top end abutting against the top plate 6, providing a rebound force for the ejector pin 9. The threaded tube 7 is screwed into the support base plate 8, and the initial height of the ejector pin 9 is controlled by adjusting the thread depth. The ejector pin 9 is then vertically fixed to the support base. The groove 18 on the outer side of the top of the support base plate 8 can cooperate with the external anti-rotation pin to prevent the ejector pin 9 from rotating during movement. The second support base 10 is fastened to the bottom of the first support base 1 with bolts, and the two circular holes 11 and 12 are aligned. The one-way cylinder 13 is fixed to the bottom surface of the second support base 10 through the L-shaped mounting plate 14. The piston cylinder 15 is inserted into the circular holes 11 and 12 of the double base and passes through the return spring 5. The piston rod 16 slides up and down in the piston cylinder 15, and the rubber pad 17 fixedly connected to its top end is aligned with the top plate 6.

[0029] Lifting stage: Cylinder 13 is vented, pushing piston cylinder 15 upward. The piston rod 16 and rubber pad 17 at the top of piston cylinder 15 abut against top plate 6, and continue to push top plate 6 upward. Top plate 6 overcomes the compression force of return spring 5, driving threaded tube 7 and support base plate 8 upward, and finally ejector pin 9 ejects the wafer.

[0030] Reset Phase: Cylinder 13 depressurizes. The reset spring 5 releases its compression force, causing the top plate 6 to move downwards, and the ejector pin 9 to return to its original position. This process utilizes the spring's reset force, reducing cylinder energy consumption and avoiding continuous air pressure consumption.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pin holder structure for a die bonder, comprising a first support base (1), characterized in that: The first support base (1) has a limiting cylinder (2) welded to its top end. The first support base (1) has a first circular hole (11) in the middle and an annular limiting groove (3) on the inner wall of the first circular hole (11).

2. The ejector pin holder structure for a die bonder according to claim 1, characterized in that: A trapezoidal ring plate (4) is provided in the middle of the annular limiting groove (3), and a reset spring (5) is fixedly connected to the top of the trapezoidal ring plate (4), and a top plate (6) is fixedly connected to the top of the reset spring (5).

3. The ejector pin holder structure for a die bonder according to claim 2, characterized in that: The top of the top plate (6) is fixedly connected to a threaded tube (7), and the middle thread of the threaded tube (7) is connected to a supporting base plate (8). The top of the supporting base plate (8) is fixedly connected to a pin (9).

4. The ejector pin holder structure for a die bonder according to claim 3, characterized in that: The top outer side of the support base plate (8) is provided with several grooves (18).

5. The ejector pin holder structure for a die bonder according to claim 1, characterized in that: The lower end of the first support base (1) is fixedly connected to the second support base (10) by bolts. The second support base (10) has a second circular hole (12) in the middle. The inner diameter of the second circular hole (12) is the same as the inner diameter of the first circular hole (11).

6. The ejector pin holder structure for a die bonder according to claim 5, characterized in that: A one-way cylinder (13) is fixedly connected to the bottom end of the second support base (10). L-shaped mounting plates (14) are provided on the left and right sides of the one-way cylinder (13). The top end of the L-shaped mounting plate (14) is fixedly connected to the bottom end of the second support base (10).

7. A pin holder structure for a die bonder according to claim 6, characterized in that: The output end of the one-way cylinder (13) is fixedly connected to a piston cylinder (15). The piston cylinder (15) extends upward and passes through the interior of the first support base (1), the second support base (10), and the return spring (5). The piston cylinder (15) is slidably connected to a piston rod (16) inside. The top end of the piston rod (16) is fixedly connected to a rubber pad (17).

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