A cutting module in LED packaging

Abstract

The present invention provides a cutting module in LED packaging, comprising a cutting film and a plurality of LED boards compounded on the surface of the cutting film; a tape is also arranged between the LED board and the cutting film; a plurality of exhaust grooves are arranged on one side where the cutting film and the tape are compounded, and the plurality of exhaust grooves divide the cutting film into a plurality of exhaust convex points; the width of the exhaust grooves is 1.6 to 2.0 mm; the height of the exhaust convex points is 0.04 to 0.06 mm, and the top cross-sectional area of ​​the exhaust convex points is smaller than the bottom cross-sectional area. The present invention arranges exhaust convex points and exhaust grooves on the surface of the cutting film, so that it is not easy to generate bubbles, and the bubbles are discharged through the exhaust grooves by squeezing, thereby improving the product yield. The actual application of production shows that the product yield is improved from the original 97.8% to 99.85% by using the cutting module of the present invention for cutting.

Description

Technical Field

[0001] The invention belongs to the technical field of LED preparation, and in particular relates to a cutting module in LED packaging. Background Art

[0002] As the market demand for LED products continues to expand, LED packaging technology plays an important role. The process flow of LED packaging is usually: solid crystal-wire bonding-sealing glue-baking-cutting-binning-packaging. Solid crystal is to use silver glue (insulating glue) to bond the chip and the bracket together; wire bonding is to use gold wire to weld the chip and the bracket together to form a conductive circuit; sealing glue is to use glue to encapsulate the semi-finished products with solid crystal and wire bonding; baking is to fully solidify the oxygen-containing resin and perform thermal aging on the LED at the same time; cutting is to cut the entire bracket into single materials; binning is to test the optoelectronic parameters and external dimensions of the LED that has been packaged and aged, and divide the finished materials into different bins according to the set requirements.

[0003] There is an important link in the LED packaging process - cutting. This cutting link is to cut the entire LED board into single LED particles. The cutting process is convenient for particle collection. The back tape of the entire LED board will be pasted before cutting, and several LED boards will be bonded together through the cutting film during cutting. Since the back tape contacts the cutting film when preparing the material during the cutting operation process, bubbles will be generated in the middle part, and the bubbles are not easy to get rid of, resulting in flying materials during cutting, affecting the product yield. Summary of the invention

[0004] The object of the present invention is to provide a cutting module for LED packaging. The cutting module of the present invention solves the problem of bubbles generated by the back tape and the cutting film during material preparation.

[0005] The present invention provides a cutting module in LED packaging, comprising a cutting film and a plurality of LED boards compounded on the surface of the cutting film;

[0006] An adhesive tape is also provided between the LED board and the cutting adhesive film;

[0007] The cutting film is provided with a plurality of exhaust grooves on one side thereof combined with the adhesive tape, and the plurality of exhaust grooves divide the cutting film into a plurality of exhaust convex points;

[0008] The width of the exhaust groove is 1.6-2.0 mm; the height of the exhaust protrusion is 0.04-0.06 mm;

[0009] The cross-sectional area of ​​the top of the exhaust protrusion is smaller than the cross-sectional area of ​​the bottom.

[0010] Preferably, the bottom width of the exhaust protrusion is 0.05-0.08 mm, and the bottom length is 0.08-0.1 mm.

[0011] Preferably, the top width of the exhaust protrusion is 0.02-0.05 mm, and the top length is 0.03-0.06 mm.

[0012] Preferably, the exhaust grooves are staggered vertically and horizontally to divide the cutting film into a plurality of exhaust protrusions.

[0013] Preferably, the tape is a high temperature resistant polyethylene tape;

[0014] The thickness of the adhesive tape is 0.05-0.5 mm.

[0015] Preferably, the cutting film is a high temperature resistant polyethylene cutting film.

[0016] Preferably, the number of the LED boards is 4 to 50.

[0017] Preferably, the plurality of LED panels are evenly and symmetrically distributed on the surface of the cutting film.

[0018] Preferably, the dicing film with exhaust convex points is obtained by pressing a mold provided with convex points.

[0019] Preferably, the spacing distance between adjacent LED panels is 5 to 20 cm.

[0020] The present invention provides a cutting module in LED packaging, comprising a cutting film and a plurality of LED boards compounded on the surface of the cutting film; a tape is also arranged between the LED board and the cutting film; a plurality of exhaust grooves are arranged on one side where the cutting film and the tape are compounded, and the plurality of exhaust grooves divide the cutting film into a plurality of exhaust bumps; the width of the exhaust grooves is 1.6 to 2.0 mm; the height of the exhaust bumps is 0.04 to 0.06 mm, and the top cross-sectional area of ​​the exhaust bumps is smaller than the bottom cross-sectional area. The present invention arranges exhaust bumps and exhaust grooves on the surface of the cutting film, and optimizes the shape and size of the exhaust grooves and exhaust bumps according to the adhesive properties, so that it is not easy to generate bubbles. Even if bubbles are generated during material preparation, the bubbles can be discharged through the exhaust grooves by squeezing, thereby improving the product yield. The actual application of production shows that the product yield is increased from the original 97.8% to 99.85% by using the cutting module of the present invention for cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 Cut module components for existing LEDs;

[0023] Among them, a is an LED plate, b is LED particles on the LED plate, c is an LED plate with tape attached to the back, and d is an existing cutting film;

[0024] Figure 2 It is a schematic diagram of the structure after the existing LED cutting module is assembled, and the circles in the figure represent the bubbles generated;

[0025] Figure 3 is a schematic diagram of the structure of the cutting film in the present invention,

[0026] Among them, 1-1 is the exhaust convex point, and 1-2 is the exhaust groove;

[0027] Figure 4 It is a schematic diagram of the combined structure of the cutting module in the present invention;

[0028] Figure 5 It is a schematic cross-sectional structure diagram of the combined structure of the cutting module in the present invention;

[0029] Among them, 1 is a cutting film, 1-1 is an exhaust bump, 1-2 is an exhaust groove, 2 is an adhesive tape, and 3 is an LED plate. DETAILED DESCRIPTION

[0030] The present invention provides a cutting module in LED packaging, comprising a cutting film and a plurality of LED boards compounded on the surface of the cutting film;

[0031] An adhesive tape is also provided between the LED board and the cutting adhesive film;

[0032] A plurality of exhaust grooves are provided on one side where the cutting film and the tape are combined, and the plurality of exhaust grooves divide the cutting film into a plurality of exhaust convex points;

[0033] The width of the exhaust groove is 1.6-2.0 mm; the height of the exhaust protrusion is 0.04-0.06 mm;

[0034] The cross-sectional area of ​​the top of the exhaust protrusion is smaller than the cross-sectional area of ​​the bottom.

[0035] In the present invention, the cutting module includes a cutting film and a plurality of LED boards compounded on the surface of the cutting film. In the present invention, in order to facilitate the collection of particles, the present invention preferably pastes a back tape on the back of the LED board. Therefore, in the present invention, the adhesive surface of the cutting film is in contact with the back tape.

[0036] This creates a problem of bubbles being generated between the backing tape and the dicing film, and once bubbles are generated, it is difficult to remove them.

[0037] Therefore, the present application designs the adhesive surface of the cutting adhesive film to have a structure with exhaust grooves. The specific implementation scheme is as follows: when producing the cutting adhesive film, a mold with multiple protrusions is used for pressing to obtain a cutting adhesive film with multiple exhaust protrusions. The gaps between the exhaust protrusions are interconnected to form exhaust grooves, or in other words, the multiple exhaust grooves divide the adhesive surface of the cutting adhesive film into multiple exhaust protrusions. In the present invention, the preparation method of the cutting adhesive film is a mold pressing method well known to those skilled in the art, and will not be repeated here.

[0038] In the present invention, there is no special restriction on the shape of the exhaust protrusions, and the exhaust protrusions may be any three-dimensional shape with a certain height, as long as interconnected exhaust grooves can be formed between the exhaust protrusions.

[0039] In the present invention, the exhaust convex point preferably has a top area smaller than the bottom area, that is, the exhaust convex point is thin at the top and thick at the bottom. Such a shape design can prevent bubbles from being easily generated between the cutting film and the back tape, or in other words, the generated bubbles are more easily discharged through squeezing. In the present invention, the top of the exhaust convex point refers to the end in contact with the back tape, and the bottom of the exhaust convex point refers to the end away from the back tape. In the present invention, the change trend of the exhaust convex point from thick to thin from the bottom to the top can be uniform or uneven, but it is necessary to ensure that the exhaust groove formed always remains connected and not easy to stick.

[0040] In the present invention, the height of the exhaust convex point is preferably 0.04-0.06mm, more preferably 0.05mm; the bottom surface shape of the exhaust convex point can be a quadrilateral such as a square, rectangle or rhombus, as well as a circle or an ellipse; wherein the square and rectangle can be a square or rectangle with a certain angle chamfer, which can be achieved by designing the shape of the convex point on the surface of the pressing mold. In the present invention, the bottom surface width / diameter / minor axis of the exhaust convex point is preferably 0.05-0.08mm, more preferably 0.06-0.07mm, and the bottom surface length / diameter / major axis of the exhaust convex point is preferably 0.08-0.1mm, more preferably 0.09-0.1mm.

[0041] In the present invention, the shape of the top of the exhaust convex point is preferably a quadrilateral such as a square, rectangle or rhombus, a circle or an ellipse, wherein the square and rectangle can be a square or rectangle with a certain angle chamfer, which can be achieved by designing the shape of the convex point on the surface of the pressing mold. In the present invention, the width / diameter / minor axis of the top of the exhaust convex point is preferably 0.02-0.05 mm, more preferably 0.03-0.04 mm; the length / diameter / major axis of the top of the exhaust convex point is preferably 0.03-0.06 mm, more preferably 0.04-0.05 mm.

[0042] In the present invention, the width of the exhaust groove is preferably 1.6-2.0 mm, more preferably 1.7-1.9 mm, and most preferably 1.8 mm. The exhaust grooves are preferably staggered vertically and horizontally.

[0043] In the present invention, there is no special restriction on the number of the exhaust grooves and exhaust protrusions, and they can be set accordingly according to the actual requirements of the size of the cut film.

[0044] In the present invention, the material of the cutting film is preferably high temperature resistant polyethylene (PE).

[0045] The material of the tape is preferably high temperature resistant polyethylene, and the thickness of the tape is preferably 0.05-0.5 mm, more preferably 0.1-0.4 mm, and most preferably 0.1-0.2 mm. The tape is adhered to the back of the LED board, so the area of ​​the tape is the same as the area of ​​the LED board.

[0046] In the present invention, the LED board is an LED board commonly used by technicians in this field. The LED boards are preferably evenly and symmetrically distributed on the surface of the cutting film, and are preferably arranged in rows and columns perpendicular to each other to facilitate overall cutting. There is no special restriction on the number of the LED boards, and they can be distributed according to the actual cutting capacity and production needs. Preferably, 4 to 50 LED boards are preferably distributed in a cutting module in the present invention, more preferably 8 to 20, and most preferably 8 to 12. In the present invention, the distance between adjacent LED boards is preferably 5 to 20 cm, more preferably 10 to 15 cm.

[0047] Example

[0048] The cutting module used in this embodiment is as follows: Figure 4 As shown, two rows of LED boards are distributed on the surface of the cutting film, and 4 LED boards are evenly distributed in each row, for a total of 8 LED boards. A 0.1 mm thick high temperature resistant PE tape is adhered to the back of each LED board.

[0049] The convex shape of the cutting film surface is as follows Figures 3 to 5As shown, the bottom is a square with a side length of 0.08 mm, the top is a diamond with a side length of 0.04 mm, the exhaust grooves are crisscrossed vertically and horizontally, and the width is uniform, and the groove width is 1.8 mm.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A cutting module in an LED package, comprising a cutting film and a plurality of LED boards composited on the surface of the cutting film; An adhesive tape is also provided between the LED board and the cutting adhesive film; The cutting film is provided with a plurality of exhaust grooves on one side thereof combined with the adhesive tape, and the plurality of exhaust grooves divide the cutting film into a plurality of exhaust convex points; The width of the exhaust groove is 1.6-2.0 mm; the height of the exhaust protrusion is 0.04-0.06 mm; The cross-sectional area of ​​the top of the exhaust protrusion is smaller than the cross-sectional area of ​​the bottom; The bottom surface of the exhaust convex point is in the shape of a square, a rectangle, a diamond, a circle or an ellipse, and the top surface of the exhaust convex point is in the shape of a square, a rectangle, a diamond, a circle or an ellipse.

2. The cutting module in the LED package according to claim 1, characterized in that: The bottom width of the exhaust convex point is 0.05-0.08 mm, and the bottom length is 0.08-0.1 mm.

3. The cutting module in the LED package according to claim 1, characterized in that: The top width of the exhaust convex point is 0.02-0.05 mm, and the top length is 0.03-0.06 mm.

4. The cutting module in the LED package according to claim 1, characterized in that: The exhaust grooves are staggered vertically and horizontally to divide the cutting film into a plurality of exhaust convex points.

5. The cutting module in the LED package according to claim 1, characterized in that: The adhesive tape is a high temperature resistant polyethylene tape; The thickness of the adhesive tape is 0.05-0.5 mm.

6. The cutting module in the LED package according to claim 1, characterized in that: The cutting film is a high temperature resistant polyethylene cutting film.

7. The cutting module in the LED package according to claim 1, characterized in that: The number of the LED boards is 4 to 50.

8. The cutting module in the LED package according to claim 1, characterized in that: The plurality of LED panels are evenly and symmetrically distributed on the surface of the cutting film.

9. The cutting module in the LED package according to claim 1, characterized in that: The cutting film is obtained by pressing a mold provided with convex points.

10. The cutting module in the LED package according to claim 1, characterized in that: The spacing between adjacent LED panels is 5 to 20 cm.

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