Packaging structure

Abstract

The utility model discloses a packaging structure. The packaging structure comprises a substrate, a lens, a chip and an adhesive. The base body comprises a base plate, a pedestal and a limiting frame which are connected in sequence, a filling groove is formed in the inner side wall of the limiting frame, and a sinking groove is defined by the limiting frame and the end face of the pedestal; the end of the lens is placed in the sinking groove, and the peripheral side of the lens abuts against the inner side wall of the limiting frame. The chip is installed on the substrate and located on the side, close to the substrate, of the lens. And the bonding glue is filled in the filling groove and is used for bonding the pedestal, the limiting frame and the lens. According to the scheme, the adverse effect of yellowing or cracking of the adhesive can be reduced, the lens is prevented from loosening or falling off, the service life of packaging is prolonged, the structure is simple, and assembling is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to UV packaging technical field, concretely relates to a packaging structure. BACKGROUND

[0002] At present, the packaging mode of UV LED (ultraviolet light emitting diode) is mostly die bonding, dam dispensing, covering quartz glass or sapphire glass.

[0003] Publication No. CN215342652U discloses a kind of UV LED packaging structure, including substrate, UV LED chip and light-transmitting cover;Substrate is equipped with through-hole;The upper side of substrate is equipped with conductive layer, and the lower side is equipped with bottom conductive layer;Conductive layer is equipped with round hole;UVLED chip is arranged on conductive layer;UV LED chip upper side is equipped with light-transmitting cover;Light-transmitting cover is composed of light-transmitting film and dam, specifically, glue layer is equipped between light-transmitting film and dam, to be bonded by glue.

[0004] However, glue is prone to yellowing or cracking phenomenon under UV light long time irradiation, and the adhesion is reduced, which causes the lens (light-transmitting film) to loosen or fall off, shortens the packaging life, and affects product performance. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the above technical deficiencies, and proposes a kind of packaging structure, solves the technical problem that the adhesive between the lens and substrate of packaging in prior art is prone to yellowing or cracking phenomenon under UV light long time irradiation, and the adhesion is reduced, which causes the lens to loosen or fall off, shortens the packaging life, and affects product performance.

[0006] To achieve the above technical purpose, the utility model takes the following technical scheme:

[0007] The utility model provides a kind of packaging structure, comprising:

[0008] Base body, including substrate, pedestal and limiting frame connected in sequence, the inner side wall of limiting frame is equipped with filling slot, and with the end surface of pedestal is enclosed to form sunken groove;

[0009] Lens, its end rests in the sunken groove, and its circumferential side is supported on the inner side wall of limiting frame;

[0010] Chip, installation is in substrate, and located in the lens side close to substrate;And

[0011] Adhesive, filling in the filling slot, and bonding pedestal, limiting frame and lens.

[0012] In some embodiments, the filling grooves and the adhesive layers are provided in plurality, and the plurality of filling grooves are arranged along the circumference of the lens, and the plurality of adhesive layers are filled in the plurality of filling grooves respectively.

[0013] In some embodiments, the end edge of the lens is provided with a plurality of corners along the circumference thereof, and the plurality of corners of the lens are rested on the sinking grooves.

[0014] The plurality of filling grooves are located at the plurality of corners of the lens.

[0015] In some embodiments, the packaging structure further comprises an auxiliary adhesive layer located between the sinking grooves and the lens.

[0016] In some embodiments, the lens is a polygonal lens, and the auxiliary adhesive layer and the filling grooves are located at two sides adjacent to the lens.

[0017] In some embodiments, the auxiliary adhesive layer is provided in plurality, and the plurality of auxiliary adhesive layers are arranged along the circumference of the lens.

[0018] In some embodiments, the pedestal is arranged in a ring shape to form a dam, and the dam is arranged around the outer periphery of the chip.

[0019] The limiting frame is fixed to the dam and located at the outer end edge of the dam, and the sinking grooves are located at the inner side of the limiting frame and arranged in a ring shape.

[0020] In some embodiments, the depth of the filling groove, the thickness of the adhesive layer and the thickness of the part of the lens rested on the sinking groove are consistent.

[0021] In some embodiments, the adhesive layer is an inorganic silicon adhesive layer.

[0022] In some embodiments, the pedestal and the limiting frame are integrally arranged.

[0023] Compared with the prior art, the packaging structure provided by the utility model can rest the lens on the sinking grooves of the pedestal and limit the lens in the limiting frame to avoid accidental running of the lens when the lens is installed, and then inject the adhesive layer into the filling grooves of the limiting frame. At this time, the adhesive layer can directly connect the limiting frame, the pedestal and the lens on one hand to expand the bonding site, and on the other hand can be partially filled in the gap between the limiting frame and the lens, so as to at least eliminate the gap between the part of the limiting frame in the filling grooves and the lens, make the side wall of the lens and the limiting frame abut more tightly, increase the friction force between the lens and the limiting frame, and even when the adhesive layer is yellow or cracked and the adhesion is reduced, the lens is not easy to separate from the limiting frame. In this way, the present scheme can reduce the adverse effects of yellowing or cracking of the adhesive layer, avoid loosening or falling off of the lens, prolong the service life of the packaging, and has the advantages of simple structure and convenient assembly. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the packaging structure provided in an embodiment of the present utility model;

[0025] Figure 2 yes Figure 1 Cross-sectional view of the matrix and lens on plane AA;

[0026] Figure 3 yes Figure 1 Schematic diagram of the matrix;

[0027] Figure 4 yes Figure 1 Top view of the matrix and lens;

[0028] Figure 5 yes Figure 1 Cross-sectional view of the matrix on the BB plane;

[0029] Figure 6 yes Figure 2 Enlarged view of point C in the middle;

[0030] Figure 7 yes Figure 1 A cross-sectional view of the matrix on plane AA.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Substrate; 2. Stand; 21. Sinking groove; 22. Dam; 3. Limiting frame; 3a. Filling groove; 4. Lens; 41. Corner; 5. Chip; 6. Adhesive; 7. Auxiliary adhesive layer. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0034] To address the technical problem in existing technologies where the adhesive between the lens and the substrate is prone to yellowing or cracking under prolonged UV light exposure, resulting in reduced adhesion, lens loosening or detachment, shortened package life, and impact on product performance, this invention provides a packaging structure that reduces the adverse effects of adhesive yellowing or cracking, prevents lens loosening or detachment, extends package life, and is simple in structure and easy to assemble.

[0035] Please see Figures 1 to 3 , Figures 1 to 3The utility model provides a packaging structure's structure schematic drawing in one embodiment of the utility model, and the packaging structure includes base body, lens 4, chip 5 and adhesive 6, the base body includes the substrate 1, pedestal 2 and spacing frame 3 who connects gradually, and the inner side wall of spacing frame 3 is equipped with filling groove 3a, and with the end surface of pedestal 2 is enclosed and forms the sunken groove 21, the end of lens 4 rests in sunken groove 21, and its circumferential side is in abutment on the inner side wall of spacing frame 3, chip 5 is installed in substrate 1, and is located in the side of lens 4 close to substrate 1, and adhesive 6 is filled in filling groove 3a, and is bonded pedestal 2, spacing frame 3 and lens 4.

[0036] The utility model provides a packaging structure when installing lens 4, first lens 4 rests on the sunken groove 21 of pedestal 2, and lens 4 is limited in spacing frame 3 to avoid lens 4 accidental running, and then injects adhesive 6 in the filling groove 3a of spacing frame 3. At this time, adhesive 6 can be directly connected spacing frame 3, pedestal 2 and lens 4 on one hand, expand bonding site, on the other hand can be partially filled in the gap between spacing frame 3 and lens 4, to eliminate the gap between spacing frame 3 in filling groove 3a part and lens 4 at least, so that lens 4 and the side wall of spacing frame 3 are more tightly contacted, increase the friction between lens 4 and spacing frame 3, even when adhesive 6 yellow change or crack and adhesive property reduce, lens 4 is not easy to separate from spacing frame 3. Thus, the present scheme can reduce the adverse effects of adhesive 6 yellow change or crack, avoid lens 4 loose or fall off, prolong the service life of packaging, and simple structure, convenient to assemble.

[0037] In one embodiment, please refer to Figures 3 to 5 , filling groove 3a and adhesive 6 are equipped with multiple, multiple filling grooves 3a are arranged along the circumference of lens 4, and multiple adhesive 6 are filled in multiple filling grooves 3a.

[0038] In the embodiment, multiple filling grooves 3a are arranged along the circumference of lens 4, and adhesive 6 is filled in each filling groove 3a, which further expands the bonding capacity between lens 4, spacing frame 3 and pedestal 2, making lens 4 more stable. Specifically, in the present scheme, filling groove 3a is provided with four.

[0039] In one embodiment, please refer to Figure 4 , the end edge of lens 4 is provided with multiple corners 41 along the circumference thereof, and the multiple corners 41 of lens 4 are all rested on the sunken groove 21; multiple filling grooves 3a are located at the multiple corners 41 of lens 4.

[0040] In the embodiment, the multiple corners 41 of lens 4 are all rested on the sunken groove 21 of pedestal 2, making lens 4 more stable, and the corners 41 of lens 4 are covered by adhesive 6, increasing the adhesive force of lens 4 and reducing the risk of lens 4 falling off. Specifically, in the present scheme, the corners 41 of lens 4 are provided with four.

[0041] In one of the embodiments, please refer to Figure 6 The packaging structure further comprises an auxiliary adhesive layer 7, which is located between the sunken groove 21 and the lens 4.

[0042] In this embodiment, the auxiliary adhesive layer 7 is also arranged between the sunken groove 21 and the lens 4 of the pedestal 2, that is, when the lens 4 is assembled, the auxiliary adhesive layer 7 is first coated on the sunken groove 21 to preliminarily fix the lens 4 on the pedestal 2, and then the adhesive 6 is injected into the filling groove 3a to further improve the bonding strength between the lens 4 and the pedestal 2 and realize multi-point connection, thereby reducing the adverse effects of yellowing or cracking of the adhesive.

[0043] In one of the embodiments, the lens 4 is a polygonal lens 4, and the auxiliary adhesive layer 7 and the filling groove 3a are located on two adjacent sides of the lens 4.

[0044] In this embodiment, the auxiliary adhesive layer 7 and the filling groove 3a are arranged on different sides of the lens 4 to improve the stability of the bonding of the lens 4. It should be noted that, in order to prolong the yellowing and cracking period of the adhesive 6 and the auxiliary adhesive layer 7, the adhesive 6 and the auxiliary adhesive layer 7 are both made of inorganic silica gel to improve their anti-yellowing and anti-cracking performance. In addition, in another embodiment, the adhesive 6 can be set as a type of foaming adhesive, so that the volume of the adhesive 6 increases after solidification, further pressing the lens 4 against the limiting frame 3 to increase the friction therebetween. The specific composition and principle of the foaming adhesive are prior art and will not be described here.

[0045] In one of the embodiments, the auxiliary adhesive layer 7 is provided in multiple, and the multiple auxiliary adhesive layers 7 are arranged along the circumference of the lens 4.

[0046] In this embodiment, the auxiliary adhesive layer 7 is also arranged in multiple along the circumference of the lens 4, further improving the connection strength between the lens 4 and the pedestal 2 and reducing the risk of lens 4 falling off. Specifically, in this scheme, the auxiliary adhesive layer 7 is provided in two and located on opposite sides of the lens 4.

[0047] In one of the embodiments, please refer to Figure 3 and Figure 7 The pedestal 2 is arranged in a ring shape to form a dam 22, and the dam 22 is annularly arranged at the outer periphery of the chip 5; the limiting frame 3 is fixed to the dam 22 and located at the outer edge of the dam 22, and the sunken groove 21 is located on the inner side of the limiting frame 3 and arranged in a ring shape.

[0048] In the embodiment, the chip 5 is surrounded in the dam 22, and the lens 4 is placed on the annular sunken groove 21 of the dam 22, so that the sealing performance of the chip 5 is improved. At this time, the depth of the filling groove 3a can be appropriately increased to accommodate thicker adhesive 6, so as to increase the bonding capacity between the lens 4 and the limiting frame 3 and the pedestal 2, and the thicker adhesive 6 is not easy to penetrate ultraviolet rays, so as to prolong the yellowing or cracking period of the adhesive 6; meanwhile, when the thickness of the adhesive 6 is increased, the gap between the lens 4 and the pedestal 2 caused by the excessive thickness of the adhesive layer in the prior art does not occur, so that the lens 4 can be tightly attached to the pedestal 2 at all times, and foreign matters are effectively prevented from entering due to the excessive gap between the lens 4 and the pedestal 2 when the adhesive layer cracks. In this way, the adverse effects of the yellowing or cracking of the adhesive 6 can be reduced, the lens 4 is prevented from loosening or falling off, the sealing performance of the chip 5 is ensured, the service life of the package is prolonged, and the structure is simple.

[0049] In one of the embodiments, the depth of the filling groove 3a, the thickness of the adhesive 6 and the thickness of the part of the lens 4 placed on the sunken groove 21 are consistent.

[0050] In the embodiment, the depth of the filling groove 3a, the thickness of the adhesive 6 and the thickness of the outer edge of the lens 4 are consistent, so that the adhesive 6 can just cover the outer edge of the lens 4, the bonding capacity of the lens 4 is enhanced, and the adhesive is prevented from overflowing.

[0051] In one of the embodiments, the pedestal 2 and the limiting frame 3 are integrally arranged.

[0052] In the embodiment, the pedestal 2 and the limiting frame 3 are integrally arranged, so that the pedestal 2 and the limiting frame 3 can be integrally formed when the dam 22 process is performed, and the convenience is improved.

[0053] In order to better understand the utility model, the following will be combined with Figures 1 to 7 The technical scheme of the utility model is described in detail as follows:

[0054] The packaging structure provided by the utility model is used for installing the lens 4, the lens 4 is placed on the sunken groove 21 of the dam 22 first, the lens 4 is limited in the limiting frame 3 to prevent the lens 4 from running accidentally, and then the adhesive 6 is injected into the filling groove 3a of the limiting frame 3. At this time, the adhesive 6 can be directly connected with the limiting frame 3, the dam 22 and the lens 4 on one hand, and can be partially filled in the gap between the limiting frame 3 and the lens 4 on the other hand, so as to at least eliminate the gap between the part of the filling groove 3a of the limiting frame 3 and the lens 4, the side wall of the lens 4 and the limiting frame 3 are more tightly abutted, the friction between the lens 4 and the limiting frame 3 is increased, and the lens 4 is not easy to separate from the limiting frame 3 even when the adhesive 6 is yellowed or cracked and the adhesion is reduced.

[0055] In addition, the depth of the filling groove 3a can be appropriately increased to accommodate thicker adhesive 6, thereby increasing the bonding capacity between the lens 4 and the limiting frame 3 and the dam 22, and the thicker adhesive 6 is not easy to penetrate ultraviolet rays, prolonging the yellowing or cracking period of the adhesive 6; at the same time, when the thickness of the adhesive 6 is increased, the gap between the lens 4 and the dam 22 caused by the excessive thickness of the adhesive layer in the prior art does not occur, so that the lens 4 can be always closely attached to the dam 22, effectively avoiding the introduction of foreign matters from the outside when the adhesive layer cracks due to the excessive gap between the lens 4 and the dam 22. In this way, the present scheme can reduce the adverse effects of the yellowing or cracking of the adhesive 6, avoid the loosening or falling of the lens 4, and ensure the sealing performance of the chip 5, prolong the service life of the package, and the structure is simple.

[0056] The specific embodiments of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any various other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A packaging structure, characterized in that, include: The substrate includes a base plate, a platform, and a limiting frame connected in sequence. The inner sidewall of the limiting frame is provided with a filling groove, and together with the end face of the platform, a recessed groove is formed. The lens has its end resting in the recessed groove and its periphery abutting against the inner wall of the limiting frame. The chip is mounted on the substrate and located on the side of the lens closest to the substrate; and Adhesive is used to fill the filling groove and bond the base, the limiting frame, and the lens. The filling groove and the adhesive are provided in multiple ways, and the multiple filling grooves are arranged at intervals along the circumference of the lens, and the multiple adhesives are respectively filled in the multiple filling grooves.

2. The packaging structure according to claim 1, characterized in that, The lens has multiple corner portions spaced circumferentially along its end edge, and each of the multiple corner portions of the lens rests in the recessed groove. The plurality of filling grooves are respectively located at the plurality of corners of the lens.

3. The packaging structure according to claim 1, characterized in that, The encapsulation structure also includes an auxiliary adhesive layer, which is located between the recessed groove and the lens.

4. The packaging structure according to claim 3, characterized in that, The lens is a polygonal lens, and the auxiliary adhesive layer and the filling groove are located on two adjacent sides of the lens.

5. The packaging structure according to claim 3, characterized in that, The auxiliary adhesive layer is provided in multiple layers, and the multiple auxiliary adhesive layers are arranged at intervals along the circumference of the lens.

6. The packaging structure according to claim 1, characterized in that, The platform is arranged in a ring shape to form a dam, and the dam is arranged around the outer periphery of the chip; The limiting frame is fixed to the dam and located at the outer edge of the dam. The sinking trough is located inside the limiting frame and is arranged in a ring shape.

7. The packaging structure according to claim 1, characterized in that, The depth of the filling groove, the thickness of the adhesive, and the thickness of the portion of the lens resting in the sinking groove are all the same.

8. The packaging structure according to claim 1, characterized in that, The adhesive is an inorganic silicone adhesive.

9. The packaging structure according to claim 1, characterized in that, The pedestal and the limiting frame are integrally formed.

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