Chip removal device for removing a tape chip

Abstract

The present invention discloses a chip removing device for removing a tape chip, comprising a placement table having a dropping hole, a support frame having a support arm, and a cutting cutter that slides on the support arm and slides along a direction approaching or separating from the dropping hole. A retraction groove and a rectangular cutter body are provided on the cutting cutter, and the rectangular cutter body has four edge blades and a corner cutting portion. The present invention can avoid the adsorption of the cut tape by the cutter body and avoid the phenomenon of paste overflow during cutting.

Description

Technical Field

[0001] The present invention relates to the technical field of chip packaging, and particularly to a chip removing device for removing a tape chip.

Background Art

[0002] Flip Chip technology, also known as "Flip Chip Packaging" or "Flip Chip Packaging Method", is a kind of chip packaging technology. This packaging technology is different from the conventional method of placing a chip on a substrate and connecting the chip and the connection points on the substrate using wire bonding technology. Instead, long solder joints are installed at the chip connection points, and then the chip is turned over and directly connected to the substrate through the solder joints. Currently, Flip Chip technology is commonly used in microprocessor packaging and has become a mainstream packaging technology such as in graphics, special applications, and computer chip sets. In particular, typical examples of Flip Chip technology are Chip On Glass (COG) and Chip On Film (COF) packaging.

[0003] Among the above packaging processes, Chip On Film packaging is a grain soft film framing technology for fixing an integrated circuit (IC) on a substrate. A soft film added circuit board is used as a packaging chip carrier to connect the chip and the flexible substrate circuit, and a packaging gel is installed on the upper side of the flexible substrate adjacent to the chip for packaging.

[0004] During the bonding process of the chip and the flexible substrate, generally, first, a tape on which the flexible substrate is placed is placed on the operating table, and the tape is adsorbed by the vacuum suction holes provided on the operating table. Then, the tape is pressed by a molding machine and a jig to clamp and fix the tape on the operating table. After that, the chip is bonded onto the flexible substrate.

[0005] After bonding the chip onto the flexible substrate, it is necessary to test the chip. After the test is completed, it is necessary to remove the chips that do not meet the requirements from the tape. However, in the prior art, when removing, the flexible substrate around the corresponding chip is directly cut from the tape by stamping. In the above method, the flexible substrate attached to the chip is likely to be adsorbed onto the cutting cutter. At the same time, during the actual use process, since an adhesive is applied on the flexible substrate, it is necessary to apply two layers of adhesive to the thick product of the flexible substrate. One of them is an aluminum foil, and the other is an adhesive tape. When cutting a product with two layers of adhesive by the existing method, the situation of glue overflow is likely to occur. In the prior art, when the blade in contact with the tape during the descending process of the cutter body contacts the simultaneously cut tape, the extrusion of the tape occurs, and due to such extrusion, the gel overflows and the situation of glue overflow occurs.

Summary of the Invention

[0006] An object of the present invention is to provide a chip removal device for removing tape chips in order to solve the drawbacks in the prior art, effectively reduce the formation of negative pressure in the retraction groove, avoid the adsorption of the cut tape by the cutting cutter body, and effectively avoid the phenomenon of glue overflow during the cutting process.

[0007] The chip removal device for removing tape chips provided by the present invention is a placement table used for placing the tape and having a drop hole penetrating through the placement table, a support arm provided on the placement table and extending above the drop hole, a cutting cutter sliding on the support arm, the cutting cutter sliding along a direction approaching or separating from the drop hole opposite to the position of the drop hole, and the cutting cutter being adapted to the drop hole. On the cutting cutter, a retraction groove opening toward the placement table and a rectangular cutter body surrounding the retraction groove are provided. The rectangular cutter body has four edge blades sequentially connected end to end and a corner cutting part formed at the position where two adjacent edge blades intersect. The edge blades are arc-shaped and curved in a direction away from the placement table.

[0008] In the chip removing device for removing the tape chip described above, preferably, a plurality of spraying passages communicating with the retraction groove are provided on the cutting cutter.

[0009] In the chip removing device for removing the tape chip described above, preferably, the spraying passage has an air outlet provided at the bottom of the retraction groove and an air inlet provided opposite to the air outlet. The air inlet is provided on the side of the cutting cutter separated from the retraction groove.

[0010] In the chip removing device for removing the tape chip described above, preferably, a groove body is provided on the side of the placement table separated from the support frame. The dropping hole has a retraction outlet provided at the bottom of the groove body, and the dimension of the groove body is larger than the dimension of the dropping hole.

[0011] In the chip removing device for removing the tape chip described above, preferably, the groove body is elliptical, and the major axis of the ellipse coincides with the length direction of the dropping hole.

[0012] In the chip removing device for removing the tape chip described above, preferably, a rectangular sliding hole adapted to the cutting cutter is provided on the support frame. The cutting cutter has a sliding part slidably fitted into the rectangular sliding hole. The sliding part has four sliding surfaces connected end to end, and two adjacent sliding surfaces are connected by a chamfered part.

[0013] In the chip removing device for removing the tape chip described above, preferably, the cutting cutter further has a stroke limiting portion provided on the sliding portion, and the stroke limiting portion is provided so as to limit falling out from the rectangular sliding hole.

[0014] In the chip removing device for removing the tape chip described above, preferably, the support frame is fixed on the placement table and integrally formed with the placement table.

[0015] In the chip removing device for removing the tape chip described above, preferably, an antistatic protection plate is provided on the placement table, and a protection cover is provided on the side of the support frame facing the placement table.

[0016] In the chip removing device for removing the tape chip described above, preferably, the protection cover includes a horizontal plate and vertical connecting plates provided on both opposite sides of the horizontal plate. The vertical connecting plates are fixed on the support frame, and a pair of limiting portions are provided opposite to each other on the horizontal plate, and a limiting groove is formed between the pair of limiting portions.

Advantages of the Invention

[0017] Compared with the prior art, in the present invention, the edge blade in this embodiment is arc-shaped and curved in the direction away from the placement table. During the cutting process, the corner cutting portion first contacts the tape. After the corner cutting portion contacts the tape, since the edge blade is arc-shaped, there is still a gap between the edge blade and the tape to be cut. Due to the existence of this gap, the evacuation groove is always in communication with the outside, and the rectangular cutter body is gradually combined with the tape during the descending process, effectively reducing the formation of negative pressure in the evacuation groove, and further effectively avoiding the adsorption of the tape cut by the cutting cutter body.

[0018] Also, during the descent process of the rectangular cutter body, the four corners first contact the tape and cut it, and then the inner part of the edge blade gradually contacts the tape and cuts it. Therefore, such a method can effectively avoid the phenomenon of glue overflow.

Brief Description of the Drawings

[0019]

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Explanation of Reference Signs

[0020] 1 Placement table 10 Drop hole 11 Groove body 12 Anti-static protection plate 2 Support frame 21 Support arm 22 Rectangular sliding hole 23 Protection cover 231 Horizontal plate 232 Vertical connecting plate 233 Limiting part 3 Cutting cutter 31 Retraction groove 32 Rectangular cutter body 321 Edge blade 322 Corner cutting part 33 Spraying passage 331 Air outlet 332 Air inlet 34 Sliding part 341 Sliding surface 342 Chamfered part 35 Stroke limiting part

Embodiment for Carrying out the Invention

[0021] The following embodiments described with reference to the accompanying drawings are exemplary and are used only for the purpose of interpreting the present invention and are not to be construed as limiting the present invention.

[0022] Embodiment of the present invention: As shown in FIGS. 1 to 11, a chip removing device for removing a tape chip includes a mounting table 1, a support frame 2, and a cutting cutter 3. The mounting table 1 is used for mounting a tape, has a drop hole 10 penetrating through the mounting table 1, and when a tape with chips attached is mounted on the mounting table 1 and the tape is punched when the chips on the tape are exactly at the position of the drop hole 10, the tape with chips attached is cut and leaks out from the drop hole 10.

[0023] The support frame 2 is provided on the placement table 1 and has a support arm 21 extending above the drop hole 10, and the support arm 21 is used to fix and support the cutting cutter 3.

[0024] The cutting cutter 3 is provided to slide on the support arm 21, and the cutting cutter 3 slides along a direction approaching or separating from the drop hole 10 facing the position of the drop hole 10, and the cutting cutter 3 is adapted to the drop hole 10. The cutting cutter 3 can penetrate the drop hole 10, the dimension of the drop hole 10 is slightly larger than the dimension of the cutting cutter 3, and the cutting cutter 3 can slide up and down along the drop hole 10. In this way, when the cutting cutter 3 descends, the cut chips can be dropped through the drop hole 10.

[0025] As shown in FIGS. 7 to 9, the cutting cutter 3 includes a retraction groove 31 opening toward the placement table 1 and a rectangular cutter body 32 surrounding the retraction groove 31. The rectangular cutter body 32 has four edge blades 321 sequentially connected end to end and a corner cutting portion 322 formed at a position where two adjacent edge blades 321 intersect. The edge blade 321 is arc-shaped and curves in a direction away from the placement table 1.

[0026] By sequentially connecting the four edge blades 321 end to end to cut the four edges of the chip respectively, the cutting of the tape with the chip attached is achieved. In this embodiment, the edge blade 321 is arc-shaped and curves in a direction away from the placement table 1. During the cutting process, the corner cutting portion 322 first contacts the tape. After the corner cutting portion 322 contacts the tape, since the edge blade 321 is arc-shaped, there is still a gap between the edge blade 321 and the tape to be cut. Due to the existence of this gap, the retraction groove 31 is always in communication with the outside, and the rectangular cutter body 32 gradually combines with the tape during the descending process, effectively reducing the formation of negative pressure in the retraction groove 31 and further effectively avoiding the adsorption to the cut tape.

[0027] If the side of the rectangular cutter body 32 close to the placement table 1 is flat, that is, if the cutting positions of all the edge blades 321 are in the same plane, during the descending process of the entire rectangular cutter body 32, at the moment of adsorption to the tape, negative pressure is likely to be formed in the retraction groove 31, and as a result, adsorption of the cut tape occurs.

[0028] During the actual use process, after the tape with the chip attached is positioned on the placement table 1, the chip faces downward and just opposes the position of the dropping hole 10, and the chip is positioned within the dropping hole 10. Of course, due to the existence of the retraction groove 31, when the tape with the chip attached is positioned on the placement table, the chip may face upward, and during the descending process of the cutting cutter 3, the retraction groove 31 may just cover the chip. At this time, it should be understood that the depth of the retraction groove 31 is not less than the thickness of the chip.

[0029] Also, during the descending process of the rectangular cutter body 32, first the four corners contact and cut the tape, and then the inner part of the edge blade 321 gradually contacts and cuts the tape. By such a method, the phenomenon of paste overflow can be effectively avoided. If all the four edge blades 321 in contact with the tape when the rectangular cutter body 32 drops contact the cut tape simultaneously on a plane, extrusion of the tape will occur, and due to such extrusion, the gel will overflow, resulting in the situation of paste overflow.

[0030] In the prior art, during the cutting process, when cutting on one side, a lot of gel remains at the edge of the cut, and the cut edge becomes dirty. However, in this embodiment, since the corner cutting part 322 at the edge cuts first and then gradually moves, the appearance of the paste overflow problem can be avoided.

[0031] Furthermore, by making the cutter body arc-shaped, the damage to the cutter can be effectively reduced. By adopting the arc-shaped design, the impact force during punching and cutting is reduced. When the cutter body punches on the entire plane, the impact force on the tape becomes larger, which is not conducive to stable support during the use process.

[0032] In the above embodiment, the edge blade 321 is in the shape of an arc that curves in a direction away from the placement table 2. In another embodiment, the edge blade 321 may be relatively inclined, and the distance between the edge blade 321 and the placement table is not equal.

[0033] The material of the rectangular cutter body 32 is tungsten steel 90HRA. Compared with the high-speed steel HRC60 of the prior art, tungsten steel 90HRA can more effectively avoid the adsorption of the tape and weaken the frictional effect.

[0034] In order to more effectively avoid the adsorption of the tape after cutting, the cutting cutter 3 is further provided with a plurality of spraying passages 33 communicating with the retraction groove 31. An air pump is connected to the spraying passage 33, and air is sprayed into the retraction groove 31 through the air pump, so that the tape adsorbed on the cutting cutter 3 can be further cut.

[0035] As shown in FIG. 4, the spraying passage 33 has an air outlet 331 provided at the bottom of the retraction groove 31 and an air inlet 332 provided opposite to the air outlet 331. The air inlet 332 is provided on the side of the cutting cutter 3 separated from the retraction groove 31.

[0036] Furthermore, in order to make the tape after cutting fall better, a groove body 11 is provided on the side of the placement table 1 separated from the support frame 2. The dropping hole 10 has a retraction outlet provided at the bottom of the groove body 11, and the size of the groove body 11 is larger than the size of the dropping hole 10.

[0037] By providing the groove body 11 and setting the size of the groove body 11 to be larger than that of the dropping hole 10, the tape after cutting can quickly reach the wider groove body 11 after being pushed out through the dropping hole 10, making the tape after cutting fall better and reducing the influence of the tape being adsorbed on the cutting cutter 3 on the use of the cutting cutter 3.

[0038] The groove body 11 is elliptical, and the major axis of the ellipse coincides with the length direction of the dropping hole 10. Since the dropping hole 10 is adapted to the rectangular cutter body 32, the dropping hole 10 is also rectangular and has a length direction and a width direction. The groove body 11 has an elliptical structure with a rectangular cross-section, and the major axis direction of the ellipse is the same as the length direction of the dropping hole 10.

[0039] As shown in FIGS. 6 to 10, a rectangular sliding hole 22 adapted to the cutting cutter 3 is provided on the support frame 2. The cutting cutter 3 has a sliding portion 34 that is slidably fitted into the rectangular sliding hole 22. The sliding portion 34 has four sliding surfaces 341 connected end to end, and two adjacent sliding surfaces 341 are connected by a chamfered portion 342.

[0040] By providing the chamfered portion 342, the sliding between the sliding portion 34 and the support arm 21 becomes smoother. In this embodiment, the chamfered portion 342 is used to connect the planes of two adjacent sliding surfaces 341, and the entire sliding portion 34 has an octagonal shape. Of course, the chamfered portion 342 may be arc-shaped to connect two adjacent sliding surfaces 341. By making it arc-shaped, the friction during the sliding process can be more effectively reduced. Of course, in another embodiment, the entire sliding surface 341 may be cylindrical to further reduce the relative friction during the sliding process.

[0041] Furthermore, in order to better limit the stroke during the sliding process of the cutting cutter 3, the cutting cutter 3 further has a stroke limiting portion 35 provided on the sliding portion 34. The stroke limiting portion 35 is provided to limit the falling out from the rectangular sliding hole 32.

[0042] The rectangular cutter body 32 is integrally formed with the sliding portion 34. The stroke limiting portion 35 is provided at one end of the sliding portion 34 separated from the rectangular cutter body 32. The stroke limiting portion 35 abuts against the upper surface of the support arm 21 and is used to avoid excessive downward sliding of the cutting cutter 3 in the vertical direction. Thereby, the protection of the cutting cutter 3 is achieved.

[0043] In this embodiment, the support frame 2 is fixed on the placement table 1 and integrally formed with the placement table 1. By integrally forming the support frame 2 with the placement table 1, the whole device can be made more stable, and when the cutting cutter 3 slides on the support arm 21, it can slide more smoothly. Also, due to the integral forming, the distance between the support arm 21 and the placement table 1 becomes smaller, the sliding stroke of the cutting cutter 3 can be reduced, and the wear during the sliding process of the cutting cutter 3 can be further reduced.

[0044] The placement table 1 further has an anti-static protection plate 12, and a protection cover 23 is provided on the side of the placement table 1 on the support frame 2 facing the placement table 1.

[0045] The anti-static protection plate 12 faces the position of the protection cover 23, and both are formed of anti-static materials. After the tape is placed on the placement table 1, the tape is located on the anti-static protection plate 12, and the anti-static protection plate 12 can effectively prevent the tape from contacting the metal placement table 1 and thereby generating static electricity.

[0046] The protection cover 23 wraps the cutting cutter 3, and a through hole adapted to the rectangular cutter body 32 is formed on the protection cover 23. By providing the protection cover 23, it can effectively avoid the cut chips after cutting from being brought into the rectangular sliding hole 22 together with the rectangular cutter body 32 and affecting the sliding of the cutting cutter 3 in the rectangular sliding hole 22.

[0047] As shown in FIG. 11, the protection cover 23 includes a horizontal plate 231 and vertical connecting plates 232 provided on both opposite sides of the horizontal plate 231. The vertical connecting plates 232 are fixed on the support frame 2, a pair of limiting portions 233 are provided oppositely on the horizontal plate 231, and a limiting groove 2312 adapted to the tape is formed between the pair of limiting portions 233.

[0048] The embodiments of the present invention have been described in detail above. However, the above description is used to facilitate understanding of the content of the present invention and is not intended to limit the present invention. The present invention may include those solutions that can be changed and improved without departing from the spirit of the present invention. Furthermore, the present invention shall include equivalents of the present invention.

Claims

1. A placement table used for placing a tape, the placement table having a drop hole penetrating the placement table, a support arm provided on the placement table and extending above the drop hole, a cutting cutter that slides on the support arm, the cutting cutter sliding along a direction approaching or separating from the drop hole facing the position of the drop hole, and the cutting cutter being adapted to the drop hole, and comprising a cutting cutter, a retraction groove opening toward the placement table and a rectangular cutter body surrounding the retraction groove are provided on the cutting cutter, the rectangular cutter body having four edge blades sequentially connected end to end and a corner cutting portion formed at a position where two adjacent edge blades intersect, the edge blades being arc-shaped and curved in a direction away from the placement table, a chip removing device for removing a tape chip, characterized in that.

2. A plurality of spraying passages communicating with the retraction groove are provided on the cutting cutter, the chip removing device for removing a tape chip according to claim 1, characterized in that.

3. The spraying passage has an air outlet provided at the bottom of the retraction groove and an air inlet provided opposite to the air outlet, and the air inlet is provided on a side separated from the retraction groove on the cutting cutter, the chip removing device for removing a tape chip according to claim 2, characterized in that.

4. A groove body is provided on a side separated from the support frame on the placement table, the drop hole having a retraction outlet provided at the bottom of the groove body, and the dimensions of the groove body being larger than the dimensions of the drop hole, the chip removing device for removing a tape chip according to claim 1, characterized in that.

5. The groove body is elliptical, and the major axis of the ellipse coincides with the length direction of the drop hole, the chip removing device for removing a tape chip according to claim 4, characterized in that.

6. A rectangular sliding hole adapted to the cutting cutter is provided on the support frame, the cutting cutter having a sliding portion slidably fitted into the rectangular sliding hole, the sliding portion having four sliding surfaces connected end to end, and two adjacent sliding surfaces being connected by a chamfered portion, the chip removing device for removing a tape chip according to claim 1, characterized in that.

7. The cutting cutter further has a stroke limiting part provided on the sliding part, and the stroke limiting part is provided so as to limit the falling out from the rectangular sliding hole. The chip removing device for removing the tape chip according to claim 6, characterized in that.

8. The support frame is fixed on the mounting table and integrally formed with the mounting table. The chip removing device for removing the tape chip according to claim 1, characterized in that.

9. An antistatic protection plate is provided on the mounting table, and a protection cover is provided on the side of the support frame facing the mounting table. The chip removing device for removing the tape chip according to claim 1, characterized in that.

10. The protection cover includes a horizontal plate and vertical connecting plates provided on both opposite sides of the horizontal plate. The vertical connecting plates are fixed on the support frame, and a pair of limiting parts provided opposite to each other on the horizontal plate are provided. A limiting groove is formed between the pair of limiting parts. The chip removing device for removing the tape chip according to claim 9, characterized in that.

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