COB packaging bonding pad windowing structure

Abstract

The utility model discloses a COB packaging bonding pad windowing structure which comprises a substrate, a windowing boss is arranged on the substrate, a paster groove is arranged in the windowing boss, a plurality of LED light sources are arranged in the paster groove, a layer of packaging glue is wrapped outside the plurality of LED light sources, and a stabilizing structure is arranged between the packaging glue and the paster groove. The windowing boss is provided with a light reflecting structure, so that the connection stability between the packaging adhesive and the PCB can be improved, the stability of the COB light source is improved, meanwhile, the light reflecting structure is arranged, the illumination brightness is improved, the light source is utilized to the maximum extent, the illumination effect is more concentrated, the structure is simple, and the use is convenient.

Description

Technical Field

[0001] The utility model relates to a COB packaging pad structure, in particular to a COB packaging pad windowing structure. Background Art

[0002] In the COB packaging technology, bare chips are soldered onto a PCB board, and multiple bare chips are bonded to the PCB board using a packaging adhesive. The current stability effect of the packaging adhesive and the PCB board is not ideal, and the existing windowing structure does not have a reflective structure, so the brightness of the concentrated light source cannot be maximized.

[0003] Therefore, the existing COB packaging pad structure needs to be further improved. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a COB packaging pad windowing structure, which can improve the stability of the encapsulation adhesive and the illumination brightness.

[0005] To achieve the above purpose, the utility model adopts the following scheme:

[0006] A COB packaging pad windowing structure includes a substrate, on which a windowing boss is provided. A patch groove is arranged inside the windowing boss, and a plurality of LED light sources are arranged in the patch groove. A layer of packaging adhesive is wrapped outside the plurality of LED light sources. A stabilizing structure is arranged between the packaging adhesive and the patch groove, and a reflective structure is arranged on the windowing boss.

[0007] Further, the stabilizing structure includes a filling inner groove arranged on the lower surface of the patch groove for filling the packaging adhesive.

[0008] Further, the reflective structure is arranged around the inner edge of the patch groove.

[0009] Further, the reflective structure includes an inclined surface arranged on the inner edge of the patch groove, and a reflective material is coated on the inclined surface.

[0010] Further, the reflective material is a white oil layer.

[0011] Further, the reflective material is a fluorescent agent layer.

[0012] Further, the thickness of the fluorescent agent layer is 2 - 5 μm.

[0013] Further, the inclined surface is inclined at 30°.

[0014] In summary, the beneficial effects of the utility model compared with the prior art are:

[0015] The utility model solves the deficiencies existing in the existing COB package pad structure. Through the structural arrangement of the utility model, the following advantages are achieved: it can improve the connection stability between the encapsulation glue and the PCB board, improve the stability of the COB light source. At the same time, a reflective structure is provided to improve the illumination brightness, maximize the utilization of the light source, make the illumination effect more concentrated, and the structure is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the utility model;

[0017] Figure 2 is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 is Figure 2 a partial enlarged view of part A of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0020] Please refer to Figures 1-3 , the present utility model provides a COB package pad opening structure, including a substrate 1, a window opening boss 101 is arranged on the substrate 1, a patch groove 102 is arranged in the window opening boss 101, a plurality of LED light sources 103 are arranged in the patch groove 102, a layer of encapsulation glue 104 is wrapped outside the plurality of LED light sources 103, a stabilizing structure 100 is arranged between the encapsulation glue 104 and the patch groove 102, and a reflective structure 200 is arranged on the window opening boss 101;

[0021] The plurality of LED light sources 103 are welded in the patch welding area of the patch groove 102, and the plurality of LED light sources 103 are wrapped by filling encapsulation materials in the patch groove 102;

[0022] After filling, the encapsulation glue 104 enters the stabilizing structure 100 and is not easy to fall off after forming, improving the firmness and service life;

[0023] The reflective structure 200 can make the light source more concentrated and avoid the occurrence of light scattering, improving the utilization rate of the light source.

[0024] The stabilizing structure 100 of the present utility model includes a filling inner groove 105 provided on the lower surface of the patch groove 102 for filling the encapsulation glue 104.

[0025] When encapsulating, the encapsulation glue 104 will fill into the filling inner groove 105 and form an inverted hook structure after molding, preventing the overall encapsulation glue 104 from easily falling off.

[0026] The reflective structure 200 of the present utility model is arranged around the inner edge of the patch groove 102.

[0027] The reflective structure 200 of the present utility model includes an inclined surface 201 provided on the inner edge of the patch groove 102, and a reflective material is coated on the inclined surface 201.

[0028] The reflective material of the present utility model is a white oil layer.

[0029] The reflective material of the present utility model is a fluorescent agent layer.

[0030] The thickness of the fluorescent agent layer of the present utility model is 2 - 5 μm.

[0031] The inclined surface 201 of the present utility model is inclined at 30°.

[0032] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A COB package pad window structure, comprising a substrate (1), characterized in that: The substrate (1) is provided with a window boss (101), a patch groove (102) is provided in the window boss (101), a plurality of LED light sources (103) are provided in the patch groove (102), a layer of packaging glue (104) is wrapped outside the plurality of LED light sources (103), a stabilizing structure (100) is provided between the packaging glue (104) and the patch groove (102), and a reflective structure (200) is provided on the window boss (101).

2. A COB package pad window structure according to claim 1, characterized in that: The stabilizing structure (100) comprises a filling inner groove (105) arranged on the lower surface of the patch groove (102) and used for filling the packaging glue (104).

3. A COB package pad window structure according to claim 2, characterized in that: The reflective structure (200) is arranged around the inner edge of the patch groove (102).

4. A COB package pad window structure according to claim 3, characterized in that: The reflective structure (200) comprises an inclined surface (201) arranged at the inner edge of the patch groove (102), and a reflective material is coated on the inclined surface (201).

5. A COB package pad window structure according to claim 4, characterized in that: The reflective material is a white oil layer.

6. A COB package pad window structure according to claim 4, characterized in that: The reflective material is a fluorescent agent layer.

7. A COB package pad window structure according to claim 6, characterized in that: The thickness of the fluorescent agent layer is 2-5 um.

8. A COB package pad window structure according to claim 4, characterized in that: The inclined surface (201) is inclined at 30°.

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