Multi-row lead frame loading device

Abstract

The present invention discloses a multi-row lead frame feeding device, which relates to the technical field of semiconductor device packaging, and is used to solve the problem of difficulty in picking up multi-row lead frames during processing. It comprises: a cylinder, a pair of cylinders are symmetrically arranged on both sides of a cylinder fixing bracket, and two clamping claw bodies are arranged at the lower end; a clamping claw body, two fixed ends are symmetrically arranged at the lower end of each of the clamping claw bodies, and a screw rod is arranged on each of the fixed ends; the screw rod has a width between threads that matches the thickness of the multi-row lead frame to be adsorbed.

Description

Technical Field

[0001] The invention relates to the technical field of semiconductor device packaging, and more specifically to a multi-row lead frame loading device. Background Art

[0002] Semiconductor chip packaging is a process that uses film technology and micro-processing technology to stick the chip to the lead frame with solder paste, soft solder and other adhesive materials through professional adhesive equipment, lead out the terminal, and fix it with plastic insulating medium to form an overall structure. The lead frame is the basic material of semiconductor packaging and the chip carrier of the integrated circuit. With the help of connecting materials (gold, copper and aluminum wires), the electrical connection between the lead end of the chip's internal circuit and the external lead is realized, forming a key structural part of the electrical circuit and acting as a bridge to connect with external wires. Its main functions are circuit connection, heat dissipation, mechanical support, etc.

[0003] The lead frames currently used in the semiconductor packaging industry include single-row frames and multi-row frames. For the loading devices of single-row frames, they mainly include flip type, suction type, and drawer type; and for the loading devices of multi-row lead frames, they mainly include suction type and clamping type. Among them, the suction-type loading device picks up the multi-row lead frames by controlling the vacuum size and the contact between the suction nozzle plane and the multi-row lead frames without leakage; the clamping-type loading device picks up the multi-row lead frames by controlling the contraction of the clamping jaws through the cylinder solenoid valve; because the ordinary clamping jaws clamp the multi-row lead frames through the V-shaped grooves on the clamping jaws, it requires the placement of the multi-row lead frames to correspond to the clamping jaws picking position. Any slight deviation will lead to clamping failure or multiple multi-row lead frames will be clamped at the same time, resulting in large losses in the picking process, affecting the production process. Summary of the invention

[0004] The embodiment of the present invention provides a multi-row lead frame loading device, which is used to solve the problem of difficulty in picking up the multi-row lead frames during the processing.

[0005] The embodiment of the present invention provides a multi-row lead frame feeding device comprising:

[0006] Cylinders, a pair of cylinders are symmetrically arranged on both sides of the cylinder fixing bracket, and two clamping claw bodies are arranged at the lower ends thereof;

[0007] A clamping jaw body, wherein two fixed ends are symmetrically arranged at the lower end of each clamping jaw body, and a screw rod is arranged on each fixed end;

[0008] The screw rod has a width between threads that matches the thickness of the multiple rows of lead frames to be adsorbed.

[0009] Preferably, the shape of the clamp body is Y-shaped, comprising a first connecting end and a second connecting end;

[0010] One end of the first connection end is fixedly connected to the lower end of the cylinder, and the other end is connected to the two second connection ends;

[0011] One end of the two second connection ends away from the first connection end is used to set the fixed end.

[0012] Preferably, the fixed end is in a rectangular shape, a circular hole is arranged at the center, and the screw rod is arranged in the circular hole.

[0013] Preferably, an angle between an upper surface of the fixing end and an upper surface of the second connecting end is less than 180 degrees.

[0014] Preferably, the two second connection ends are fixedly connected to the first connection end respectively;

[0015] Wherein, the two second connection ends are parallel to each other.

[0016] Preferably, two clamping jaw bodies are symmetrically arranged at the lower end of each of the cylinders;

[0017] The lower end of each of the cylinders includes four fixed ends, and the four fixed ends are located in the same horizontal plane.

[0018] Preferably, the screw rod arranged in each of the fixed ends has an equal angle with the fixed end.

[0019] Preferably, it also includes a first sensor, which is arranged below the cylinder fixing bracket and is used to determine the distance between the lower end of the cylinder and the multiple rows of lead frames to be adsorbed;

[0020] Wherein, the distance between the first sensor and the lower surface of the cylinder fixing bracket is smaller than the distance between the lower surface of any one of the clamping jaw bodies and the lower surface of the cylinder fixing bracket.

[0021] Preferably, a second sensor is further included, which is arranged below the cylinder fixing bracket and above the first sensor, and is used to determine whether a plurality of rows of lead frames to be adsorbed are arranged on the fixing end.

[0022] Preferably, it also includes an air inlet;

[0023] An air inlet hole is arranged on each of the cylinders, and the horizontal movement of the clamp body is controlled by switching the air inlet hole.

[0024] The embodiment of the present invention provides a multi-row lead frame loading device, comprising: a cylinder, a pair of cylinders are symmetrically arranged on both sides of a cylinder fixing bracket, and two clamping jaw bodies are arranged at the lower end; a clamping jaw body, two fixed ends are symmetrically arranged at the lower end of each of the clamping jaw bodies, and a screw rod is arranged on each of the fixed ends; the screw rod, the width between the threads included by the screw rod matches the thickness of the multi-row lead frame to be adsorbed. In the device, the two rows of fixed ends arranged below the cylinder have a spacing greater than the width of the multi-row lead frame to be adsorbed; further, since a screw rod is arranged on each fixed end, when the two rows of fixed ends are controlled by the cylinder to move toward each other, the multi-row lead frame to be adsorbed can be just embedded between the threads included by the screw rod; further, by controlling the cylinder fixing bracket, the picking up and moving of the multi-row lead frame to be adsorbed can be achieved. The loading device provided in the embodiment of the present invention solves the problem in the prior art that during the picking process of the multiple rows of lead frames to be adsorbed, the loading device needs to be aligned with the setting position of the lead frames to be adsorbed in strict accordance with the installation requirements. Once there is a position deviation, the picking of the multiple rows of lead frames to be adsorbed will fail. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic structural diagram of a multi-row lead frame feeding device provided in an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the side view of the clamp body and the fixed end provided in an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of a top view of the clamp body and the fixed end provided in an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of a cylinder structure provided in an embodiment of the present invention;

[0030] Among them, 1 is the clamp body; 1-1 is the first connecting end; 1-2 is the second connecting end; 1-3 is the fixed end; 1-4 is the screw rod; 2 is the cylinder; 3 is the cylinder fixing bracket; 4 is the first sensor; 5 is the second sensor; 6 is the air inlet; 7 is the fixing clamp; 8 is the clamp guide rail. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Figure 1 A schematic structural diagram of a multi-row lead frame feeding device provided in an embodiment of the present invention; Figure 2 A schematic diagram of the side view of the clamp body and the fixed end provided in an embodiment of the present invention; Figure 3 A schematic diagram of a top view of the clamp body and the fixed end provided in an embodiment of the present invention; Figure 4 The following is a schematic diagram of the cylinder structure provided by the embodiment of the present invention; Figure 1 to Figure 4 , a multi-row lead frame loading device provided by an embodiment of the present invention is introduced in detail.

[0033] like Figure 1 and Figure 2 As shown, the multi-row lead frame loading device mainly includes a cylinder 2, a cylinder fixing bracket 3, a clamping jaw body 1, a fixing end 1-3 and a screw rod 1-4; specifically, a pair of cylinders 2 are symmetrically arranged on both sides of the cylinder fixing bracket 3, and the two cylinders 2 are respectively connected to the extension ends on both sides of the cylinder fixing bracket 3. In the embodiment of the present invention, the loading device is mainly used to pick up the multi-row lead frames to be adsorbed, therefore, the lengths of the extension ends arranged on both sides of the cylinder fixing bracket are consistent, and the models of the two cylinders are also consistent.

[0034] Furthermore, two clamping jaw bodies 1 are provided at the lower end of each cylinder 2, and two fixed ends 1-3 are symmetrically provided at the lower end of each clamping jaw body 1. Screws 1-4 are provided on the fixed ends 1-3. In the embodiment of the present invention, the width between the threads included in the screws matches the thickness of the multi-row lead frame to be adsorbed, that is, the width between the threads included in the screws is just consistent with the thickness of the multi-row lead frame to be adsorbed. In other words, the multi-row lead frame to be adsorbed can be embedded between the threads of the screws.

[0035] It should be noted that in the multi-row lead frame feeding device provided in the embodiment of the present invention, a cylinder 2 is arranged on both sides of a cylinder fixing bracket 3, and two clamping jaw bodies 1 are arranged correspondingly at the lower end of a cylinder 2, and two fixed ends 1-3 are arranged on a clamping jaw body 1. It can be determined that the lower end of a cylinder fixing bracket 3 will include eight fixed ends 1-3, and the eight fixed ends 1-3 are divided into two rows.

[0036] Based on the feeding device provided by the embodiment of the present invention, two rows of fixed ends are arranged under the cylinder, and the spacing between the two rows of fixed ends is greater than the width of the multiple rows of lead frames to be adsorbed; further, since a screw rod is arranged on each fixed end, when the two rows of fixed ends are controlled by the cylinder to move toward each other, the multiple rows of lead frames to be adsorbed can be just embedded between the threads included in the screw rod; further, by controlling the cylinder fixed bracket, the multiple rows of lead frames to be adsorbed can be picked up and moved. The feeding device provided by the embodiment of the present invention solves the problem in the prior art that during the picking process of the multiple rows of lead frames to be adsorbed, the feeding device needs to be aligned with the strict requirements of the setting position of the lead frames to be adsorbed, and once there is a position deviation, the picking of the multiple rows of lead frames to be adsorbed fails.

[0037] For example, Figure 2 As shown, the clamp body provided by the embodiment of the present invention includes a first connection end 1-1 and two second connection ends 1-2; further, as Figure 4 As shown, in the embodiment of the present invention, a fixing clamp 7 for fixing the clamp body and a clamp guide rail 8 for sliding the clamp body are arranged at the lower end of each cylinder; specifically, one end of the first connecting end is connected to the fixing clamp at the lower end of the cylinder, and the other end is connected to two second connecting ends, and the ends of the two second connecting ends away from the first connecting end are used to set the fixing end.

[0038] It should be noted that, in the embodiment of the present invention, the fixed end is used to set the screw rod, and the screw rod is used to embed the multiple rows of lead frames to be adsorbed. In order to ensure that each screw rod can contact the lead frame to be adsorbed, it is necessary to ensure that the two fixed ends set on the two second connection ends have the same angle with the upper surface of the second connection ends, and the screw rods set in the fixed ends have the same angle with the fixed ends.

[0039] Furthermore, in order to be able to set a screw rod on the fixed end and prevent the screw rod from falling off the fixed end during operation, preferably, the fixed end is rectangular in shape, and a through hole is set in the center of the rectangle, and the through hole is used to set the screw rod.

[0040] Furthermore, in order to be able to adsorb multiple rows of lead frames of different widths, preferably, the angle between the upper surface of the fixing end and the upper surface of the second connection end is less than 180 degrees, so that the distance between the two rows of screw rods can increase with the length of the screw rods. Figure 3 As shown, the projection of the screw rod 1-4 in the vertical direction only partially overlaps with the projection of the fixed end 1-3 in the vertical direction, and the projection of the area extending along the length of the screw rod 1-4 in the vertical direction is not covered by the projection of the fixed end 1-3.

[0041] In practical applications, since the multi-row lead frames to be adsorbed are used in the semiconductor field and are relatively small in size, the difference in width of the multi-row lead frames to be adsorbed can be in the centimeter level or even in the millimeter level. Through the above arrangement, when the feeding device is for the multi-row lead frames to be adsorbed with different widths, it can achieve the picking up of the multi-row lead frames to be adsorbed with specific different widths by controlling the distance between the clamp body and the screw rod and the multi-row lead frames to be adsorbed. That is, the same feeding device expands its scope of use without changing its shape.

[0042] For example, Figure 1 and Figure 2 As shown, in the clamp body 1 provided by the embodiment of the present invention, although one end of the two second connection ends 1-2 is fixedly connected to the first connection end 1-1 respectively, the connection method of the first connection end 1-1 and the second connection end 1-2 is not limited. In one method, the first ends of the two second connection ends 1-2 overlap and are fixedly connected to the first connection end 1-1, that is, a certain angle is formed between the two second connection ends 1-2; in another method, as Figure 3 As shown, the two second connection ends 1-2 are parallel to each other, and they must be connected to the extension ends of the first connection end 1-1 respectively. In the embodiment of the present invention, the connection method of the two second connection ends 1-2 and the first connection end 1-1 is not limited, as long as the fixed ends 1-3 arranged on the two second connection ends 1-2 have the same orientation direction, the angle between their upper surfaces and the upper surfaces of the second connection ends 1-2 is consistent, and they have the same horizontal height.

[0043] For example, in the embodiment of the present invention, since two clamping jaw bodies are symmetrically arranged at the lower end of each cylinder, and two fixed ends are arranged at the lower end of each clamping jaw body, four fixed ends can be arranged at the lower end of one cylinder. In practical applications, since it is necessary to control the clamping jaw body to realize the picking up of multiple rows of lead frames to be adsorbed, the four fixed ends arranged under one cylinder need to have the same horizontal height in the horizontal direction, that is, the two clamping jaw bodies and the four fixed ends arranged at the lower end of one cylinder need to be located at the same horizontal plane.

[0044] Furthermore, two cylinders are arranged on both sides of a cylinder fixing bracket, and therefore, the lower end of a cylinder fixing bracket includes eight fixed ends. In order to be able to pick up multiple rows of lead frames to be adsorbed by controlling the clamping jaw body, preferably, the eight fixed ends arranged under a cylinder fixing bracket need to have the same horizontal height in the horizontal direction, that is, the four clamping jaw bodies and eight fixed ends included in the two cylinders on both sides of a cylinder fixing bracket need to be located in the same horizontal plane respectively.

[0045] For example, a multi-row lead frame feeding device provided by an embodiment of the present invention is as follows: Figure 1 As shown, it also includes a first sensor 4; specifically, the first sensor 4 is arranged below the cylinder fixing bracket 3, and the first sensor 4 is used to determine the distance between the lower surface of the cylinder 2 and the multiple rows of lead frames to be adsorbed. The distance information between the lower end surface of the cylinder 2 and the upper surface of the multiple rows of lead frames to be adsorbed fed back by the first sensor 4 can realize the control of the up and down movement of the clamping jaw body 1 arranged below the cylinder 2.

[0046] In practical applications, the distance between the first sensor and the lower surface of the cylinder fixing bracket is smaller than the distance between the lower surface of any one of the clamping jaw bodies and the lower surface of the cylinder fixing bracket.

[0047] Furthermore, a second sensor 5 is included. The second sensor 5 is arranged below the cylinder fixing bracket 3 and above the first sensor 4, and is used to determine whether a plurality of rows of lead frames to be adsorbed are arranged on the fixing end 1-3.

[0048] For example, a multi-row lead frame feeding device provided by an embodiment of the present invention is as follows: Figure 1 As shown, it also includes an air inlet 6 and a solenoid valve; specifically, each cylinder 2 is provided with an air inlet 6. In practical applications, the solenoid valve is used to control the opening and closing of the air inlet. When the air inlet is opened, compressed air enters the cylinder, thereby controlling the fixed clamp disposed under the cylinder to extend or retract, thereby driving the clamp body disposed on the fixed clamp to move on the clamp guide rail; when the air inlet is closed, the cylinder controls the clamp body to return to its original position.

[0049] It should be noted that, by controlling the opening and closing of the air inlet by the above-mentioned solenoid valve, the cylinder can control the horizontal movement of the two clamping bodies arranged below the cylinder. For example, before the two clamping bodies arranged under a cylinder move toward each other in the horizontal direction of the clamping guide rail, the spacing between the fixed ends arranged on the two clamping bodies will be greater than the width of the multi-row lead frame to be adsorbed; further, according to the spacing between the lower end surface of the cylinder and the upper surface of the multi-row lead frame to be adsorbed fed back by the first sensor, the two clamping bodies under the cylinder are controlled to move toward each other in the horizontal direction of the clamping guide rail, so that the multi-row lead frame to be adsorbed can be embedded between the threads of the screw rod, thereby realizing the picking up of the multi-row lead frame to be adsorbed.

[0050] In order to more clearly introduce the multi-row lead frame loading device provided by the embodiment of the present invention, the following describes a method for using the multi-row lead frame loading device, which specifically includes the following steps:

[0051] Step 101, setting a screw rod with a thread in a through hole of a fixed end, and adjusting the rotation distance of each screw rod in the through hole so that eight screw rods have the same rotation distance in the fixed end;

[0052] Step 102, setting the clamp body on the fixing clamp at the lower end of the cylinder, and connecting the two clamp bodies at the lower end of each cylinder bottom through the fixing clamp;

[0053] Step 103, arranging the cylinder of the assembled clamp body on both sides of the cylinder fixing bracket, and connecting the air pipe to the air inlet hole on the cylinder;

[0054] Step 104, disposing the first sensor and the second sensor below the cylinder fixing bracket;

[0055] Step 105, adjusting the installed multi-row lead frame feeding device so that a total of eight fixed ends in two rows are on the same horizontal plane, and adjusting the height of the first sensor so that the distance between the first sensor and the lower surface of the cylinder fixing bracket is smaller than the distance between the lower surface of any one of the clamping jaw bodies and the lower surface of the cylinder fixing bracket;

[0056] Step 106, the multi-row lead frame loading device passes through the horizontal direction of the equipment. While the multi-row lead frame loading device moves horizontally, the clamp body and the fixed end arranged under the cylinder move from the original position to the set picking position, and the multi-row lead frame to be adsorbed moves from bottom to top at the set picking position. When the first sensor senses the multi-row lead frame to be adsorbed, it sends information to the PLC controller, and the PLC controller controls the solenoid valve to open the air inlet hole, and the compressed air enters the cylinder through the air inlet hole, and the cylinder controls the two clamp bodies to move in The clamping jaws move toward each other on the guide rail, so that the multi-row lead frame can be embedded between the threads of the screw rod; the second sensor determines that the multi-row lead frame to be adsorbed has been set on the fixed end, and feeds back information to the PLC controller. The PLC controller controls the multi-row lead frame loading device to move from the set picking position to the multi-row lead frame setting position, controls the solenoid valve to close the air inlet, and the two rows of fixed ends set under the clamping jaw body move back to back. After the two rows of fixed ends move back to back, the multi-row lead frame automatically falls into the loading guide rail to complete the loading action.

[0057] In summary, an embodiment of the present invention provides a multi-row lead frame loading device, including: a cylinder, a pair of cylinders are symmetrically arranged on both sides of a cylinder fixing bracket, and two clamping jaw bodies are arranged at the lower end; a clamping jaw body, two fixed ends are symmetrically arranged at the lower end of each of the clamping jaw bodies, and a screw rod is arranged on each of the fixed ends; the screw rod, the width between the threads included by the screw rod matches the thickness of the multi-row lead frame to be adsorbed. In this device, the two rows of fixed ends arranged below the cylinder have a spacing greater than the width of the multi-row lead frame to be adsorbed; further, since a screw rod is arranged on each fixed end, when the two rows of fixed ends are controlled by the cylinder to move toward each other, the multi-row lead frame to be adsorbed can be just embedded between the threads included by the screw rod; further, by controlling the cylinder fixing bracket, the picking up and moving of the multi-row lead frame to be adsorbed can be achieved. The loading device provided in the embodiment of the present invention solves the problem in the prior art that during the picking process of the multiple rows of lead frames to be adsorbed, the loading device needs to be aligned with the setting position of the lead frames to be adsorbed in strict accordance with the installation requirements. Once there is a position deviation, the picking of the multiple rows of lead frames to be adsorbed will fail.

[0058] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0059] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0060] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A multi-row lead frame feeding device, characterized in that: include: Cylinders, a pair of cylinders are symmetrically arranged on both sides of the cylinder fixing bracket, and two clamping claw bodies are arranged at the lower ends thereof; A clamping jaw body, wherein two fixed ends are symmetrically arranged at the lower end of each of the clamping jaw bodies, and a screw rod is arranged on each of the fixed ends; the shape of the clamping jaw body is Y-shaped, and it includes a first connecting end and a second connecting end; one end of the first connecting end is fixedly connected to the lower end of the cylinder, and the other end is connected to two second connecting ends; one end of the two second connecting ends away from the first connecting end is used to arrange the fixed end; the angle between the upper surface of the fixed end and the upper surface of the second connecting end is less than 180 degrees, so that the distance between the two rows of the screw rods increases with the length of the screw rods; A screw rod, the width of which includes threads matching the thickness of the multiple rows of lead frames to be adsorbed; A fixing clamp and a clamping jaw guide rail, wherein the fixing clamp is used to fix the clamping jaw body, and the clamping jaw guide rail is used for the clamping jaw body to be slidably arranged at the bottom of the cylinder, and when the two rows of fixed ends are controlled by the cylinder to move toward each other along the clamping jaw guide rail, the multiple rows of lead frames to be adsorbed can be just embedded between the threads included in the screw rod; The cylinder controls the distance between the clamp body and the screw rod and the multiple rows of lead frames to be adsorbed, thereby picking up the multiple rows of lead frames to be adsorbed with different widths; A first sensor is arranged below the cylinder fixing bracket and is used to determine the distance between the lower end of the cylinder and the multiple rows of lead frames to be adsorbed; The second sensor is arranged below the cylinder fixing bracket and above the first sensor, and is used to determine whether a plurality of rows of lead frames to be adsorbed are arranged on the fixing end.

2. The feeding device according to claim 1, characterized in that: The fixed end is in a rectangular shape, a circular hole is arranged at the center, and the screw rod is arranged in the circular hole.

3. The feeding device according to claim 1, characterized in that: The two second connection ends are fixedly connected to the first connection ends respectively; Wherein, the two second connection ends are parallel to each other.

4. The feeding device according to claim 1, characterized in that: Two clamping jaw bodies are symmetrically arranged at the lower end of each cylinder; The lower end of each of the cylinders includes four fixed ends, and the four fixed ends are located in the same horizontal plane.

5. The multi-row lead frame feeding device according to claim 4, characterized in that: The screw rod arranged in each of the fixed ends has an equal included angle with the fixed end.

6. The multi-row lead frame feeding device according to claim 1, characterized in that: Also includes The distance between the first sensor and the lower surface of the cylinder fixing bracket is smaller than the distance between the lower surface of any one of the clamping jaw bodies and the lower surface of the cylinder fixing bracket.

7. The multi-row lead frame feeding device according to claim 1, characterized in that: Also includes air intake holes; An air inlet hole is arranged on each of the cylinders, and the horizontal movement of the clamp body is controlled by switching the air inlet hole.

Images