UV adhesive tape
By setting a light-shielding coating in the UV tape to control the adhesive distribution, the problem of the tape completely losing its adhesiveness after UV light irradiation is solved, thus achieving product stability and efficient production in subsequent processes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNSHAN QIUTI PHOTOELECTRIC TECH CO LTD
- Filing Date
- 2025-04-09
- Publication Date
- 2026-05-19
AI Technical Summary
Existing UV tapes completely lose their adhesiveness after being exposed to UV light, causing the product to deflect or shift in subsequent processes, affecting process stability and production efficiency. Furthermore, the product is prone to sliding or falling off after being de-adhesive, reducing the yield rate.
A light-shielding coating is placed between the adhesive layer and the substrate layer of the UV tape to block and absorb UV light transmission, so that the adhesive layer at the location of the light-shielding coating retains some adhesiveness after UV irradiation. The adhesiveness distribution of the tape can be controlled by designing light-shielding coatings of different shapes (strips, dots, grids).
This improves the stability of products in subsequent processes, reduces positional deviations, increases production efficiency, and ensures accurate picking and high yield rates by automated equipment.
Smart Images
Figure CN224258544U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a UV tape, and more particularly to a UV tape that can maintain its adhesiveness in a specific area after being irradiated with UV light. Background Technology
[0002] COB (Chip On Board) is a semiconductor packaging technology that directly adheres and encapsulates bare chips onto a circuit board. It is widely used in LED displays, camera modules, optical sensors, and other fields. To ensure the stability of the chips during processes such as dicing, granulation, dispensing, and packaging, UV tape is typically used as a temporary fixing material.
[0003] In related technologies, UV tapes completely lose their adhesiveness after UV curing, causing angular deviations or displacements of products during subsequent processes such as granulation and dispensing, resulting in production abnormalities and affecting process stability and production efficiency. Furthermore, traditional UV tapes are prone to slipping or falling after unsealing, making automated picking operations difficult and reducing yield. Utility Model Content
[0004] In view of this, the purpose of this utility model is to provide a UV tape that can still maintain its adhesiveness in a specific area after being irradiated with UV light.
[0005] This utility model provides a UV tape for fixing optical devices, including a substrate layer and an adhesive layer disposed on the surface of the substrate layer, wherein the adhesive layer is made of UV adhesive;
[0006] A light-shielding coating is provided between the adhesive layer and the substrate layer. The light-shielding coating is used to block and absorb UV light transmission so that the adhesive layer at the location of the light-shielding coating retains some adhesiveness after UV irradiation.
[0007] In one embodiment, the light-shielding coating is strip-shaped, and the light-shielding coating forms at least two light-shielding strips parallel to the tearing direction of the tape on the adhesive layer.
[0008] In one embodiment, the light-shielding coating is dotted, and the light-shielding coating forms multiple evenly distributed light-shielding dots on the adhesive layer.
[0009] In one embodiment, the light-shielding coating is mesh-shaped, and the light-shielding coating forms a mesh-shaped light-shielding area on the adhesive layer.
[0010] In one embodiment, the light-shielding coating is formed of black ink.
[0011] In one embodiment, the UV tape further includes a release film layer that covers the surface of the adhesive layer.
[0012] In one embodiment, the light-shielding coating is disposed in the edge region of the adhesive layer.
[0013] In one embodiment, the adhesive layer is made of acrylic adhesive.
[0014] In one embodiment, the substrate layer is made of PET or PI.
[0015] In one embodiment, two adhesive layers are provided, which are respectively disposed on both sides of the substrate layer, and at least one light-shielding coating is provided between the adhesive layer and the substrate layer.
[0016] The present invention provides a UV tape in which a light-shielding coating is provided between the adhesive layer and the substrate layer. The light-shielding coating is used to block and absorb UV light transmission, so that the adhesive layer at the position of the light-shielding coating retains some adhesiveness after UV irradiation, thereby improving the stability of the product in subsequent processes, reducing positional displacement, and improving production efficiency. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of the UV tape provided in the first embodiment of the present invention.
[0019] Figure 2 This is a schematic diagram of the light-shielding coating provided in the first embodiment of the present invention.
[0020] Figure 3 This is a schematic diagram of the light-shielding coating provided in the second embodiment of the present invention.
[0021] Figure 4 This is a schematic diagram of the light-shielding coating provided in the third embodiment of the present invention.
[0022] Figure label:
[0023] 1. Substrate layer; 2. Adhesive layer; 3. Release film layer; 21. Light-shielding strip; 22. Light-shielding point; 23. Light-shielding area. Detailed Implementation
[0024] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.
[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0026] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0027] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.
[0028] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.
[0029] First Embodiment
[0030] Please refer to Figures 1 to 2The first embodiment of this utility model provides a UV tape, comprising a substrate layer 1, an adhesive layer 2, and a release film layer 3. The adhesive layer 2 is disposed on both sides of the substrate layer 1 and is made of UV adhesive. The UV adhesive undergoes a curing reaction after being irradiated with UV light, resulting in a reduction or loss of its adhesiveness. A light-shielding coating is disposed between the adhesive layer 2 and the substrate layer 1, with at least one light-shielding coating between them. This light-shielding coating blocks and absorbs UV light transmission, ensuring that the adhesive layer 2 at the location of the light-shielding coating retains some adhesiveness after UV irradiation. The release film layer 3 covers the surface of the adhesive layer 2 to prevent contamination or premature adhesion during storage or use, thereby improving the stability of the tape. It is understandable that in actual use, when the product is pasted on the light-shielding coating of adhesive layer 2, after being irradiated by UV lamp, other areas lose their adhesiveness, while the adhesive layer corresponding to the light-shielding coating position retains its adhesiveness. This ensures that the product will not lose its fixing force after adhesive layer 2 is detached (UV cured), which can effectively prevent the product from shifting or falling off in subsequent processes (such as dispensing and encapsulation).
[0031] Since UV tape needs to be peeled off along the tearing direction during use, if the light-shielding strip 21 is arranged in an improper direction (such as a random direction), it may cause uneven tearing of the tape, affecting normal peeling. Therefore, in this embodiment, the light-shielding coating is strip-shaped, and the light-shielding coating forms two light-shielding strips 21 on the adhesive layer 2. Both light-shielding strips 21 are parallel to the tearing direction of the tape, thereby ensuring that the peeling force of the tape is evenly distributed and avoiding local tearing or residue.
[0032] Furthermore, if the width of the light-shielding tape 21 is too narrow, excessive UV light may penetrate, causing the adhesive layer 2 to cure too quickly and fail to provide sufficient adhesion, potentially leading to the product sliding or falling off after detachment. Conversely, if the width of the light-shielding tape 21 is too wide, the adhesive layer 2 may retain strong adhesion even after UV irradiation, affecting pickup efficiency and even making subsequent processing difficult. In this embodiment, by controlling the width of the light-shielding tape 21 to 2-3 mm, the adhesive layer 2 can maintain a moderate fixing force after detachment without becoming too sticky and causing pickup difficulties.
[0033] Furthermore, the light-shielding coating is formed of black ink, which has a high light-shielding rate and can effectively absorb or block UV light, absorbing the UV light that shines through and preventing it from transmitting to the adhesive layer 2 at the position of the light-shielding strip 21. Compared with transparent or light-colored coatings, black ink can minimize the transmission of UV light and improve the stability of the light-shielding effect.
[0034] Preferably, the light-shielding coating is applied to the edge area of the adhesive layer 2, allowing the edge area to retain some adhesiveness. This provides continued holding force after unbonding, ensuring the product remains relatively stable during granulation, dispensing, or encapsulation processes. The product will not move or tilt due to complete unbonding, improving process accuracy. Simultaneously, it ensures the adhesive layer 2 in the central area is fully cured after UV irradiation, facilitating easy removal of the product from the tape.
[0035] Preferably, the adhesive layer 2 is made of acrylic adhesive, which is a UV-curing adhesive with good tack control capabilities. After UV irradiation, the degree of crosslinking of the acrylic adhesive can be precisely controlled by the UV irradiation intensity and time to ensure that the tape can meet specific tack requirements after untackling, such as complete loss of tack or partial retention of tack.
[0036] Because UV tapes require good mechanical strength and weather resistance to ensure they do not deform or break during manufacturing and use, affecting product positioning accuracy, the substrate layer 1 must meet requirements for high strength, heat resistance, and dimensional stability. Therefore, in this embodiment, the substrate layer 1 is made of PET or PI material. Both PET (polyethylene terephthalate) and PI (polyimide) are high-strength, high-heat-resistant materials, ensuring that the UV tape is not easily broken or deformed during use, ensuring accurate alignment of the product after unbonding, improving production consistency, and both have good surface treatment properties, enabling good bonding with acrylic adhesive and ensuring adhesion stability.
[0037] The specific steps for using a UV tape provided in this embodiment are as follows:
[0038] S1. Take out the UV tape, peel off the release film on one side to expose the adhesive layer, and stick the product that needs to be fixed (such as chip, optical component, etc.) onto the adhesive layer.
[0039] S2. The adhesive layer continuously adheres to the product, ensuring that the product completes a series of processes on the UV tape, such as cutting, sorting, and dispensing.
[0040] S3. Use a 365nm or 395nm UV light source to irradiate the tape, so that the adhesive layer not covered by the light-shielding area is cured, and the adhesion is reduced or disappeared, while the adhesive layer in the light-shielding area still retains some adhesion.
[0041] S4. The adhesive layer within the shaded area provides some residual tack, ensuring that the product does not immediately lose its holding force after UV debonding, thus ensuring that automated equipment can pick it up accurately.
[0042] Second Embodiment
[0043] Please refer to Figure 3The difference between the UV tape provided in the first embodiment of this utility model and the first embodiment described above is that, in this embodiment, the light-shielding coating is dotted, and the light-shielding coating forms multiple evenly distributed light-shielding dots 22 on the adhesive layer 2, so that the UV light transmission area is distributed at intervals, thereby achieving the effect of local curing and local stickiness maintenance.
[0044] The strip-shaped light-shielding tape 21 may create large uncured areas, resulting in excessively strong adhesion in some areas and affecting the accurate picking by automated equipment. The light-shielding points 22, however, allow UV light to act more evenly on the adhesive layer 2, avoiding the uneven adhesion distribution caused by the long strip light-shielding tape 21, and ensuring that the tape retains controllable fixing properties after UV removal. This is suitable for processes with lower adhesion requirements but still needing some fixing force, such as:
[0045] Optical component assembly: Components such as lenses and sensors that require precise positioning can remain stable after the angle is adjusted by utilizing the tiny residual adhesiveness of the dotted light-shielding layer.
[0046] Chip packaging: Used to fix the chip in place so that it does not rotate or shift position during pick-up and bonding, thereby improving yield.
[0047] Third Embodiment
[0048] Please refer to Figure 4 The difference between the UV tape provided in the first embodiment of this utility model and the first embodiment described above is that, in this embodiment, the light-shielding coating is mesh-shaped, and the light-shielding coating forms a mesh-shaped light-shielding area 23 on the adhesive layer 2.
[0049] The grid-like light-shielding area 23 can be evenly distributed across the entire surface of the adhesive layer 2, making the change in adhesion after unbonding more uniform and controllable. Compared to the strip-like light-shielding tape 21 (which only provides fixing force in a specific direction), the grid-like structure can provide residual adhesion in multiple directions, ensuring the stability of the product in the X / Y axis direction and more effectively preventing the product from lateral slippage or rotation after unbonding.
[0050] In addition, the grid structure can evenly distribute the residual adhesive after unbonding, ensuring that the product does not completely lose its fixing force after unbonding, but can still be easily picked up. Compared to dotted light-blocking coatings (which only form fixing points in local areas), grid-like light-blocking can form staggered fixing areas across the entire tape surface, making it suitable for automated equipment that requires high-precision picking.
[0051] Furthermore, the spacing, line width, and shading ratio of the mesh structure are all adjustable, allowing for precise control of the adhesive properties of the UV-cured layer. Those skilled in the art can adjust the mesh size to suit different adhesive requirements.
[0052] Large grid (larger spacing) → Suitable for processes with lower adhesion requirements, such as semiconductor chip sorting, ensuring that the de-adhesive products can be easily picked up.
[0053] Small grid (smaller spacing) → Suitable for processes with higher adhesion requirements, such as flexible electronic packaging, to ensure that moderate holding force is still provided after debonding to prevent devices from slipping due to gravity.
[0054] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.
Claims
1. A UV tape for fixing optical components, characterized in that, It includes a substrate layer (1) and an adhesive layer (2) disposed on the surface of the substrate layer (1), the adhesive layer (2) being made of UV adhesive; A light-shielding coating is provided between the adhesive layer (2) and the substrate layer (1). The light-shielding coating is used to block and absorb UV light transmission so that the adhesive layer (2) at the location of the light-shielding coating retains some adhesiveness after UV irradiation.
2. The UV tape as described in claim 1, characterized in that, The light-shielding coating is strip-shaped, and the light-shielding coating forms at least two light-shielding strips (21) parallel to the tearing direction of the tape on the adhesive layer (2).
3. The UV tape as described in claim 1, characterized in that, The light-shielding coating is dotted, and the light-shielding coating forms multiple evenly distributed light-shielding dots (22) on the adhesive layer (2).
4. The UV tape as described in claim 1, characterized in that, The light-shielding coating is mesh-shaped, and the light-shielding coating forms a mesh-shaped light-shielding area (23) on the adhesive layer (2).
5. The UV tape according to any one of claims 2-4, characterized in that, The light-shielding coating is formed from black ink.
6. The UV tape as described in claim 5, characterized in that, The UV tape also includes a release film layer (3), which covers the surface of the adhesive layer.
7. The UV tape as described in claim 5, characterized in that, The light-shielding coating is disposed in the edge region of the adhesive layer (2).
8. The UV tape as described in claim 1, characterized in that, The adhesive layer (2) is made of acrylic adhesive.
9. The UV tape as described in claim 1, characterized in that, The substrate layer (1) is made of PET or PI.
10. The UV tape as described in claim 1, characterized in that, There are two adhesive layers (2), which are respectively disposed on both sides of the substrate layer (1), and at least one light-shielding coating is disposed between the adhesive layer (2) and the substrate layer (1).