Chip feeder

Abstract

A chip feeder comprises a base plate, a plurality of screw sleeves are arranged above the base plate, a placing plate is arranged at the upper ends of the screw sleeves, a pressing ring is arranged above the placing plate, a blue film is pasted on the lower wall of the pressing ring, a cut granular chip is pasted on the blue film, the lower wall of the blue film is tightly attached to the placing plate, a rotating air cylinder is installed on the base plate, and a rotating shaft is installed on the rotating air cylinder. The output end of the rotating air cylinder is connected with a rotating disc, inner pull grooves are formed in the rotating disc in a circumferential array mode, an included angle exists between the length direction of each inner pull groove and the radial direction of the position where the rotating disc is located, inner pull rods are arranged in the inner pull grooves in a penetrating mode, L-shaped pieces are arranged at the upper ends of the inner pull rods, and connecting rods are installed at the outer side ends of the L-shaped pieces. The outer side end of the connecting rod is connected with a concave fastener, and the inner wall of the upper end of the concave fastener acts on the upper wall of the pressing ring.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of semiconductor device processing, especially relates to a chip feeder. BACKGROUND

[0002] The eutectic machine is a kind of equipment frequently used in semiconductor device processing, which can fix the crystal grains on the base island of lead frame by eutectic method, and the common crystal grains are filled in the filling crystal grain tray or formed by cutting after pasting a blue film under the wafer, the former is commonly used for the processing of relatively simple semiconductor devices, and the latter is commonly used for the processing of relatively complex semiconductor devices, and the efficiency of the latter is better than that of the former, and the yield is also improved.The latter is fixed on a two-dimensional moving system during eutectic, and is mainly transferred to the eutectic machine by the two-dimensional moving system, and then eutectic operation is carried out.At present, the transfer fixture has the problems of complex positioning operation, low positioning accuracy and poor positioning stability, and due to the poor positioning stability, the crystal grains are easily displaced during transfer, thereby affecting the precision of crystal grain eutectic. SUMMARY

[0003] The utility model provides a kind of chip feeder to solve the deficiency of above-mentioned prior art, solve the problem of poor positioning stability of existing fixture, with strong practicality.

[0004] In order to achieve the purpose of the utility model, the following technologies are adopted:

[0005] A kind of chip feeder, including bottom disc, the upper of bottom disc is equipped with multiple silk cover, the upper end of silk cover is equipped with placement tray, the upper of placement tray is equipped with compression ring, the lower wall of compression ring is pasted with blue film, the chip after cutting is in granular form and is pasted on blue film, and the lower wall of blue film is tightly attached to placement tray, rotating cylinder is installed on bottom disc, the output end of rotating cylinder is connected with rotating disc, the inner pull slot is opened in circumferential array on rotating disc, there is an angle between the length direction of inner pull slot and the radial direction of the position on rotating disc, inner pull rod is arranged in inner pull slot, the upper end of inner pull rod is equipped with L-shaped piece, L-shaped piece is equipped with connecting rod on the outer side end, connecting rod is connected with concave buckle on the outer side end, the upper end inner wall of concave buckle acts on the upper wall of compression ring.

[0006] Further, connecting arm is installed on bottom disc by screw.

[0007] Further, the outer end of the connecting rod is threadedly connected with a pull block, the lower end of the pull block is threadedly connected with a vertically arranged through rod, the lower end of the through rod is provided with an end cap, a spring is sleeved on the through rod, the through rod is arranged through a sleeve plate at the lower end of the concave buckle, the upper end of the pull block is formed with an inclined surface, the lower wall of the placing disc is provided with a protrusion, the lower end of the protrusion is provided with an inclined groove, the outer end of the inclined groove extends upwardly and obliquely, the inclined surface on the pull block acts on the inclined groove, and the inclined surface and the inclined groove have the same inclined direction and inclined angle.

[0008] Further, the protrusion is formed with a convex part, and the connecting rod is arranged through the convex part.

[0009] Further, the pressing ring is provided with a plurality of positioning columns, the upper buckle plate at the upper end of the concave buckle is formed with a U-shaped groove at the inner end thereof in an open manner, and the positioning columns are arranged through the U-shaped groove.

[0010] The above technical scheme has the following advantages:

[0011] The utility model discloses a positioning stability of blue film is improved to improve the positioning stability of crystal grain, and also improve the precision after the crystal grain is fixed. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the utility model will be described in further detail below in conjunction with the drawings.

[0013] Figure 1 The three-dimensional structure of one of the embodiments is shown Figure 1 .

[0014] Figure 2 The three-dimensional structure of one of the embodiments is shown Figure 2 .

[0015] Figure 3 The three-dimensional structure of one of the embodiments is shown Figure 3 .

[0016] Figure 4 The enlarged view of A is shown.

[0017] Figure 5 The enlarged view of B is shown. DETAILED DESCRIPTION

[0018] As Figures 1-5As shown, a chip feeder includes a base plate 2, a connecting arm 1 is installed on the base plate 2 by screws, the other end of the connecting arm 1 is installed on a two-dimensional moving system which is briefly composed of two linear mechanisms whose movement directions are perpendicular to each other, the feeder and the die on it can be transferred into a co-crystallization machine through the two-dimensional moving system, and then co-crystallization operation is performed. A plurality of wire sleeves 21 are arranged above the base plate 2, the upper end of each wire sleeve 21 is provided with a placement disc 22, a pressing ring 54 is arranged above the placement disc 22, a blue film 55 is attached to the lower wall of the pressing ring 54, the chips cut into granular shape are attached to the blue film 55, and the lower wall of the blue film 55 is tightly attached to the placement disc 22. The blue film is attached to the lower wall of the pressing ring, and it has been attached to the back side of the wafer when the die is cut. Since the die is attached to the adhesive side of the blue film 55, the positioning effect of the blue film 55 needs to be improved to achieve the stability of the positioning of the blue film.

[0019] A rotating air cylinder 3 is installed on the base plate 2, which serves as a driving source to perform positioning and clamping operation of the pressing ring 54. The output end of the rotating air cylinder 3 is connected with a rotating disc 30, a plurality of inner pulling grooves 31 are arranged in a circumferential array on the rotating disc 30, the length direction of each inner pulling groove 31 forms an angle with the radial direction of the position where the inner pulling groove 31 is located on the rotating disc 30, and an inner pulling rod 4 is arranged in each inner pulling groove 31. When the rotating disc 30 rotates, the inner pulling rod 4 can be pulled to perform positioning operation through the inner pulling groove 31 arranged in an inclined posture on the rotating disc 30. The upper end of the inner pulling rod 4 is provided with an L-shaped piece 40, the outer side end of the L-shaped piece 40 is provided with a connecting rod 41, the outer side end of the connecting rod 41 is connected with a concave buckle, and the upper end inner wall of the concave buckle acts on the upper wall of the pressing ring 54.

[0020] In the preferred embodiment, a pulling block 26 is further connected with the outer side end of the connecting rod 41 by threads, a vertically arranged penetrating rod 27 is connected with the lower end of the pulling block 26 by threads, an end cap 28 is arranged at the lower end of the penetrating rod 27, a spring 29 is sleeved on the penetrating rod 27, the penetrating rod 27 penetrates through a sleeve plate 5 arranged at the lower end of the concave buckle, an inclined surface is formed at the upper end of the pulling block 26, a convex block 23 is arranged at the lower wall of the placement disc 22, a convex part 25 is formed on the convex block 23, the connecting rod 41 penetrates through the convex part 25 to limit and guide the movement of the connecting rod 41 through the convex part 25. An inclined groove 24 is arranged at the lower end of the convex block 23, the outer side end of the inclined groove 24 extends upwardly and obliquely, the inclined surface on the pulling block 26 acts on the inclined groove 24, and the inclined direction and the inclined angle of the inclined surface are the same as those of the inclined groove 24. When the concave buckle moves inwardly under the pulling force, the pulling block 26 can be pulled, so that the inclined surface of the pulling block 26 acts on the inclined groove 24, and the concave buckle moves downwardly as a whole, so that the upper end of the concave buckle acts on the pressing ring 54 to achieve the purpose of fixing the blue film 55.

[0021] In a more preferable embodiment, the compression ring 54 is provided with a plurality of positioning columns 53, the upper buckle plate 51 at the upper end of the concave buckle is open-shapedly formed with a U-shaped groove 52 at the inner end, and the positioning columns 53 are arranged in the U-shaped groove 52, so that the positioning precision of the compression ring 54 and the blue film 55 can be improved.

[0022] In general, when the blue film 55 and the compression ring 54 are positioned, the following operation is performed.

[0023] First, the compression ring 54 with the blue film 55 is placed on the placing disc 22, and during the placing, each positioning column 53 needs to be aligned with each U-shaped groove 52.

[0024] After the placing, the rotating cylinder 3 is started, and the rotating disc 30 on the rotating cylinder 3 is driven to rotate, the inner pulling rod 4 is synchronously moved inward through the inner pulling groove 31 on the rotating disc 30, and the pulling block 26 and the concave buckle are moved inward through the connecting rod 41, when the pulling block 26 is moved inward, the inclined groove 24 acts on the inclined surface of the pulling block 26, so that the concave buckle is moved downward, and the upper buckle plate 51 at the upper end of the concave buckle acts on the compression ring 54, and then the blue film 55 is fixed through the compression ring 54 and the placing disc 22, at the same time, the positioning columns 53 are arranged in the U-shaped grooves 52, so that the purpose of accurately positioning the crystal grains is achieved.

[0025] Finally, the crystal grains are transferred to the eutectic machine through the two-dimensional moving system, and the eutectic operation is performed.

[0026] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and obviously, those skilled in the art can make various modifications and changes to the present application without departing from the spirit and scope of the present application. Thus, if the modifications and changes of the present application belong to the scope of the claims of the present application and the equivalent technology, the present application also intends to include these modifications and changes.

Claims

1. An on-chip feeder, characterized by, The bottom disc (2) is provided with a plurality of silk sleeves (21), the upper end of the silk sleeve (21) is provided with a placing disc (22), the upper side of the placing disc (22) is provided with a compression ring (54), the lower wall of the compression ring (54) is pasted with a blue film (55), the cut chip in granular form is pasted on the blue film (55), and the lower wall of the blue film (55) is tightly attached to the placing disc (22). The bottom disc (2) is provided with a plurality of silk sleeves (21), the upper end of the silk sleeve (21) is provided with a placing disc (22), the upper side of the placing disc (22) is provided with a compression ring (54), the lower wall of the compression ring (54) is pasted with a blue film (55), the cut chip in granular form is pasted on the blue film (55), and the lower wall of the blue film (55) is tightly attached to the placing disc (22).

2. The on-chip feeder according to claim 1, wherein The bottom disc (2) is provided with a plurality of silk sleeves (21), the upper end of the silk sleeve (21) is provided with a placing disc (22), the upper side of the placing disc (22) is provided with a compression ring (54), the lower wall of the compression ring (54) is pasted with a blue film (55), the cut chip in granular form is pasted on the blue film (55), and the lower wall of the blue film (55) is tightly attached to the placing disc (22).

3. The on-chip feeder according to claim 1, wherein The bottom disc (2) is provided with a plurality of silk sleeves (21), the upper end of the silk sleeve (21) is provided with a placing disc (22), the upper side of the placing disc (22) is provided with a compression ring (54), the lower wall of the compression ring (54) is pasted with a blue film (55), the cut chip in granular form is pasted on the blue film (55), and the lower wall of the blue film (55) is tightly attached to the placing disc (22).

4. The on-chip feeder according to claim 3, wherein The bottom disc (2) is provided with a plurality of silk sleeves (21), the upper end of the silk sleeve (21) is provided with a placing disc (22), the upper side of the placing disc (22) is provided with a compression ring (54), the lower wall of the compression ring (54) is pasted with a blue film (55), the cut chip in granular form is pasted on the blue film (55), and the lower wall of the blue film (55) is tightly attached to the placing disc (22).

5. The on-chip feeder according to claim 3, wherein The bottom disc (2) is provided with a plurality of silk sleeves (21), the upper end of the silk sleeve (21) is provided with a placing disc (22), the upper side of the placing disc (22) is provided with a compression ring (54), the lower wall of the compression ring (54) is pasted with a blue film (55), the cut chip in granular form is pasted on the blue film (55), and the lower wall of the blue film (55) is tightly attached to the placing disc (22).

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