Silver paste coating device for sintering silicon carbide silver

Abstract

The utility model relates to the technical field of module packaging, in particular to a silicon carbide silver sintering silver paste coating device which comprises a base. A positioning mechanism is arranged at the top of the base; first clamping grooves for clamping a circuit board are formed in two opposite end surfaces of the two clamping plates; a supporting plate is further fixed to the top of the bearing plate, a protrusion is fixed to the rear side of the top of the supporting plate, and a second clamping groove used for clamping the circuit board is formed in the bottom end of the front end face of the protrusion. A dispensing head used for spraying silver paste to the circuit board is fixed to the front end face of the movable block. A pcb substrate is placed between the two first clamping grooves, the pcb substrate can be clamped and fixed by the first clamping grooves and the second clamping grooves along with rotation of the double-end lead screw, and under clamping and fixing of the first clamping grooves and the second clamping grooves, the condition that the pcb substrate displaces in the silver paste coating process is avoided; and therefore, the dispensing head can accurately coat the silver paste to the corresponding position, and the subsequent sintering quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to module packaging technical field, concretely is silver paste coating device of silicon carbide silver sintering. BACKGROUND

[0002] Silicon carbide silver sintering is a kind of composite material preparation technology obtained after mixing silicon carbide and silver powder and sintering at high temperature, and silver paste coating in silicon carbide silver sintering is a key link in PCB packaging process;It can not only provide electrical connection and thermal connection between chip and substrate, but also can enhance the reliability and stability of packaging. Good silver paste coating can ensure sufficient contact and combination between silver particles and silicon carbide chip in the sintering process, thereby improving sintering quality and device performance.

[0003] At present, the commonly used way is screen printing and dispensing coating when carrying out silver paste coating treatment, and dispensing coating can realize high-precision and high-efficiency silver paste coating through precise dispensing valve and dispensing machine. When using dispensing coating silver paste, silver paste needs to be coated at the corresponding position through dispensing head, but the existing dispensing coating equipment does not fix pcb substrate when carrying out coating treatment, if pcb substrate moves accidentally, it will be difficult to accurately coat silver paste to the corresponding position in the process of silver paste coating, thereby affecting the subsequent sintering quality, in view of this, we propose silver paste coating device of silicon carbide silver sintering. UTILITY MODEL CONTENT

[0004] The utility model aims at providing silver paste coating device of silicon carbide silver sintering to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] The silver paste coating device of silicon carbide silver sintering, including base, the top of base is fixed with side plate at front and back two sides;

[0007] The top of base is equipped with positioning mechanism, and the positioning mechanism includes first threaded rod rotatably installed between the two side plates, and a first motor is installed at the side plate in front for driving the first threaded rod to rotate;The first threaded rod is threadedly connected with a fixing seat, the top of the fixing seat is fixed with a bearing plate, the top rear side of the bearing plate is fixed with a connecting seat, a sliding groove is formed in the connecting seat, a double-head screw rod is rotatably installed in the sliding groove, and a second motor is installed at one end of the connecting seat for driving the double-head screw rod to rotate;The two ends of the double-head screw rod are threadedly connected with clamping plates, and the two opposite end faces of the two clamping plates are both provided with first clamping grooves for clamping circuit boards;The top of the bearing plate is also fixed with a supporting plate, the top rear side of the supporting plate is fixed with a protrusion, and a second clamping groove for clamping circuit boards is formed in the front end face bottom end of the protrusion;

[0008] The upper portion of the base is provided with a coating part, the coating part comprises two symmetrical supports, a liftable movable seat is arranged between the two supports, a movable block capable of moving horizontally is slidably arranged in the opening of the movable seat, a dispensing head for spraying silver paste to the circuit board is fixed to the front end face of the movable block.

[0009] Preferably, an electric cylinder is mounted on the top of the support, and the piston rod end of the electric cylinder is fixedly connected to the top of the movable seat through bolts.

[0010] Preferably, a second threaded rod is rotatably arranged in the opening of the movable seat, one end of the movable seat is provided with a third motor for driving the second threaded rod to rotate, and the second threaded rod passes through the movable block and is threadedly connected with the movable block.

[0011] Preferably, guide rods are fixedly arranged at both ends of the top of the movable seat, the guide rods pass through the support and are slidably connected with the support.

[0012] Preferably, a feeding pipe is arranged at the feeding port of the dispensing head, and the feeding pipe has bending property.

[0013] Preferably, a support rod is fixedly connected between the two side plates through bolts, and the support rod passes through the fixed seat and is slidably connected with the fixed seat.

[0014] Preferably, the supporting plate and the protrusion are integrally formed, and the combined shape of the supporting plate and the protrusion is L-shaped.

[0015] Preferably, guide blocks are fixedly arranged at the bottom of the clamping plate, two guide grooves are arranged at the top of the bearing plate, and the guide blocks are slidably connected with the guide grooves.

[0016] Compared with the prior art, the utility model has the advantages of:

[0017] Through the positioning mechanism: the pcb substrate is arranged between the two first clamping grooves, and the pcb substrate can be clamped and fixed by the first clamping groove and the second clamping groove through the rotation of the double-head screw rod, and the displacement of the pcb substrate during the coating of the silver paste is avoided, so that the dispensing head can accurately coat the silver paste to the corresponding position, thereby ensuring the subsequent sintering quality. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic view of the utility model;

[0019] Figure 2 It is the structure schematic view of the positioning mechanism in the utility model;

[0020] Figure 3 It is the structure front view of the coating part in the utility model;

[0021] Figure 4It is the structure schematic view of the bearing plate in the utility model;

[0022] Figure 5 It is the structure schematic view of the connecting seat in the utility model;

[0023] Figure 6 It is the structure schematic view of the supporting plate in the utility model;

[0024] In the drawing,

[0025] 1, base; 10, side plate;

[0026] 2, positioning mechanism; 20, first threaded rod; 21, first motor; 22, support rod; 23, fixed seat; 24, bearing plate; 240, guide groove; 25, connecting seat; 250, sliding groove; 26, double-end screw; 27, clamping plate; 270, first clamping groove; 271, guide block; 28, second motor; 29, supporting plate; 290, protrusion; 291, second clamping groove;

[0027] 3, coating part; 30, support; 31, electric cylinder; 32, movable seat; 33, second threaded rod; 34, third motor; 35, movable block; 36, glue dispensing head; 37, feeding pipe; 38, guide rod. DETAILED DESCRIPTION

[0028] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] The embodiment provides a technical scheme:

[0030] Please refer to Figures 1-6As shown, the silver paste coating device for sintered silicon silver includes a base 1, the top of the base 1 is fixed with side plates 10 on both sides; The top of the base 1 is provided with a positioning mechanism 2, the positioning mechanism 2 includes a first threaded rod 20 rotatably installed between the two side plates 10, a first motor 21 is installed at the front side plate 10 for driving the first threaded rod 20 to rotate; The first threaded rod 20 is threadedly connected with a fixing seat 23, the top of the fixing seat 23 is fixed with a bearing plate 24, the top of the bearing plate 24 is fixed with a connecting seat 25 at the back side, the connecting seat 25 is provided with a sliding groove 250, a double-head screw rod 26 is rotatably installed in the sliding groove 250, one end of the connecting seat 25 is provided with a second motor 28 for driving the double-head screw rod 26 to rotate; The two ends of the double-head screw rod 26 are threadedly connected with clamping plates 27, the two opposite end faces of the two clamping plates 27 are provided with first clamping grooves 270 for clamping circuit boards; The top of the bearing plate 24 is further fixed with a supporting plate 29, the top of the supporting plate 29 is fixed with a protrusion 290 at the back side, the front end face of the protrusion 290 is provided with a second clamping groove 291 for clamping the circuit board; The top of the base 1 is provided with a coating part 3, the coating part 3 includes two symmetrical supports 30, a movable seat 32 is arranged between the two supports 30, a movable block 35 is slidably installed in the opening of the movable seat 32, the front end face of the movable block 35 is fixed with a glue dispensing head 36 for spraying silver paste to the circuit board.

[0031] Further, the top of the support 30 is provided with an electric cylinder 31, the piston rod end of the electric cylinder 31 is connected with the top of the movable seat 32 through bolt fixing. The height of the movable seat 32 is adjusted through the electric cylinder 31, and then the height of the glue dispensing head 36 is adjusted to coat the silver paste on the pcb.

[0032] Further, the opening of the movable seat 32 is rotatably provided with a second threaded rod 33, one end of the movable seat 32 is provided with a third motor 34 for driving the second threaded rod 33 to rotate, the second threaded rod 33 passes through the movable block 35 and is threadedly connected with the movable block 35. Through the rotation of the second threaded rod 33, the horizontal position of the movable block 35 and the glue dispensing head 36 is adjusted, and then the position of the silver paste coating is adjusted.

[0033] In this embodiment, the top of the movable seat 32 is fixed with guide rods 38 at both ends, the guide rods 38 pass through the support 30 and are slidably connected with the support 30. The setting of the guide rod 38 improves the stability and smoothness of the lifting of the movable seat 32.

[0034] In this embodiment, the feeding pipe 37 is installed at the feeding port of the glue dispensing head 36, and the feeding pipe 37 has bending property. The bendable feeding pipe 37 is convenient to connect with the container containing silver paste, so as to provide continuous silver paste for the glue dispensing head 36.

[0035] In the embodiment, the two side plates 10 are connected by a support rod 22 fixed by bolts, and the support rod 22 penetrates through the fixing seat 23 and is in sliding connection with the fixing seat 23. The support rod 22 plays a guiding role on the horizontal movement of the fixing seat 23, and ensures the stability and smoothness of the horizontal movement of the fixing seat 23.

[0036] In the embodiment, the support plate 29 and the protrusion 290 are in one-piece structure, and the combination of the support plate 29 and the protrusion 290 is in L shape. The one-piece support plate 29 and the protrusion 290 have better connection strength, and ensure the connection stability and reliability between the support plate 29 and the protrusion 290, which is beneficial to better support the pcb.

[0037] In the embodiment, the bottom of the clamping plate 27 is fixed with a guide block 271, and the top of the bearing plate 24 is provided with two guide grooves 240, and the guide block 271 is in sliding connection with the guide groove 240. The arrangement of the guide block 271 and the guide groove 240 increases the stability and smoothness of the horizontal movement of the clamping plate 27.

[0038] It should be noted that the first clamping groove 270 and the second clamping groove 291 in the embodiment are located on the same horizontal plane. When the pcb substrate is placed on the top of the support plate 29, the pcb substrate is located on the same horizontal plane with the first clamping groove 270 and the second clamping groove 291, so that the first clamping groove 270 and the second clamping groove 291 better clamp and fix the pcb substrate.

[0039] It should be noted that the first motor 21, the second motor 28 and the third motor 34 in the embodiment are existing conventional technologies, which will not be described here.

[0040] In specific use, the user first places the PCB substrate on the top of the supporting plate 29, and inserts the rear end of the PCB substrate into the second clamping groove 291, then the user turns on the power of the second motor 28, the second motor 28 starts to work, the output shaft of the second motor 28 rotates to drive the double-head screw rod 26 to rotate, at this time, the clamping plates 27 on both sides move synchronously towards the inside, when the first clamping grooves 270 on both sides clamp the two ends of the PCB substrate, the user stops the power of the second motor 28, and the PCB substrate is fixed; then the user turns on the power of the first motor 21, the first motor 21 starts to work, the output shaft of the first motor 21 rotates to drive the first threaded rod 20 to rotate, at this time, the fixed seat 23 drives the carrier plate 24 to move horizontally, and the carrier plate 24 drives the PCB substrate to move to the specified position; then the user turns on the power of the third motor 34, the third motor 34 starts to work, the output shaft of the third motor 34 rotates to drive the second threaded rod 33 to rotate, at this time, the movable block 35 moves horizontally and drives the glue dispensing head 36 to move horizontally to the specified position, finally the user turns on the power of the electric cylinder 31, the electric cylinder 31 starts to work, the piston rod of the electric cylinder 31 extends and drives the movable seat 32 to move downwards, the movable seat 32 drives the glue dispensing head 36 to move downwards, when the glue dispensing head 36 moves to the appropriate height, the silver paste can be coated on the PCB substrate through the glue dispensing head 36.

[0041] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, the above embodiments and descriptions in the specification are only preferred examples of the present application, and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A silver paste coating apparatus for silicon carbide silver sintering, characterized by: Including the base (1), the top of the base (1) is fixed with the side plate (10) on both sides of front and back; The top of the base (1) is provided with a positioning mechanism (2), the positioning mechanism (2) includes a first threaded rod (20) rotatably installed between the two side plates (10), a first motor (21) is installed at the front side plate (10) for driving the first threaded rod (20) to rotate, the first threaded rod (20) is threadedly connected with a fixing seat (23), the top of the fixing seat (23) is fixed with a bearing plate (24), the top of the bearing plate (24) is fixed with a connecting seat (25) at the back side, the connecting seat (25) is provided with a sliding groove (250), a double-head screw rod (26) is rotatably installed in the sliding groove (250), one end of the connecting seat (25) is provided with a second motor (28) for driving the double-head screw rod (26) to rotate, the two ends of the double-head screw rod (26) are threadedly connected with clamping plates (27), the two opposite end faces of the two clamping plates (27) are provided with first clamping grooves (270) for clamping circuit boards, the top of the bearing plate (24) is further fixed with a supporting plate (29), the top of the supporting plate (29) is fixed with a protrusion (290) at the back side, the front end face of the protrusion (290) is provided with a second clamping groove (291) at the bottom end for clamping a circuit board; The top of the base (1) is provided with a coating part (3), the coating part (3) includes two symmetrical brackets (30), a liftable movable seat (32) is arranged between the two brackets (30), a movable block (35) capable of moving horizontally is slidably installed in the opening of the movable seat (32), a glue dispensing head (36) for spraying silver paste to the circuit board is fixed at the front end face of the movable block (35).

2. The silicon carbide silver sintered silver paste coating apparatus according to claim 1, characterized by: The top of the bracket (30) is provided with an electric cylinder (31), the piston rod end of the electric cylinder (31) is fixedly connected with the top of the movable seat (32) through bolts.

3. The silicon carbide silver sintered silver paste coating apparatus of claim 1, wherein: The opening of the movable seat (32) is rotatably provided with a second threaded rod (33), one end of the movable seat (32) is provided with a third motor (34) for driving the second threaded rod (33) to rotate, the second threaded rod (33) passes through the movable block (35) and is threadedly connected with the movable block (35).

4. The silicon carbide silver sintered silver paste coating apparatus of claim 1, wherein: The top of the movable seat (32) is fixed with guide rods (38) at both ends, the guide rods (38) pass through the brackets (30) and are slidably connected with the brackets (30).

5. The silicon carbide silver sintered silver paste coating apparatus of claim 1, wherein: The feeding pipe (37) is installed at the feeding port of the glue dispensing head (36), and the feeding pipe (37) has bending property.

6. The silicon carbide silver sintered silver paste coating apparatus of claim 1, wherein: The two side plates (10) are fixedly connected with a support rod (22) through bolts, the support rod (22) passes through the fixing seat (23) and is slidably connected with the fixing seat (23).

7. The silicon carbide silver sintered silver paste coating apparatus according to claim 1, characterized by: The supporting plate (29) and the protrusion (290) are an integral structure, and the combined shape of the supporting plate (29) and the protrusion (290) is L-shaped.

8. The silicon carbide silver sintered silver paste coating apparatus according to claim 1, characterized by: The bottom of the clamping plate (27) is fixed with a guide block (271), the top of the bearing plate (24) is provided with two guide grooves (240), and the guide block (271) is slidably connected with the guide grooves (240).

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