Structure for accelerating curing of UV glue

Abstract

The invention provides a structure for accelerating UV glue curing, and the structure is characterized in that the structure comprises a substrate which is coated with UV glue and is used for curing a packaging structure; the UV glue is dispensed on the substrate and is used for fixing the device after curing; and the mirror surface layer is arranged on the substrate and is used for reflecting a UV lamp light source and accelerating curing. The coating of the UV glue area on the substrate is replaced by the mirror reflection silver layer, so that the internal curing degree of the cured glue is better, and the glue curing rate is increased.

Description

Technical Field

[0001] The invention relates to the technical field of ultraviolet radiation curing, and in particular to a structure for accelerating UV glue curing. Background Art

[0002] The electronic chip packaging industry needs glue when producing products. For example, ultraviolet glue (UV glue) or optical glue (Optically Clear Adhesive, OCA) is needed in the bonding curing or exposure and development process, and protective glue is needed in the coating process. Among them, the glue is cured or reacted under the ultraviolet light irradiation of the UV irradiation device (UV curing equipment).

[0003] UV curing is ultraviolet curing. UV is the abbreviation of ultraviolet light. Curing refers to the process of converting a substance from a low molecule to a high molecule. It is a process in which the photoinitiator in the liquid UV material is stimulated to become a free radical or cation under UV radiation by using the medium and short waves (300-800 nanometers) of UV ultraviolet light, thereby initiating the polymerization of the high molecular material (resin) containing active functional groups into an insoluble and infusible solid coating.

[0004] In order to increase the curing rate, in addition to upgrading the UV lamp from a halogen lamp to a mercury lamp, and upgrading the LED point light source to a line light source or a surface light source, the low curing rate is still a problem that needs to be solved. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a structure for accelerating UV glue curing, characterized in that the structure comprises:

[0006] Substrate, coated with UV glue for curing the packaging structure;

[0007] UV glue, applied on the substrate, used to fix the device after curing;

[0008] The mirror layer is arranged on the substrate and is used to reflect the UV light source to accelerate curing.

[0009] In one embodiment of the present invention, the mirror layer is a silver layer formed by chemical reduction.

[0010] In another embodiment of the present invention, the mirror layer is disposed on a region of the substrate coated with UV glue.

[0011] In another embodiment of the present invention, the structure further comprises an ultraviolet light source, the spectrum of the ultraviolet light source is continuous in the wavelength range of 300nm-800nm, and the main wavelengths of the ultraviolet light source are 360nm and 385nm.

[0012] In another embodiment of the present invention, the ultraviolet light source is a metal halide lamp, a mercury lamp or an LED lamp.

[0013] In another embodiment of the present invention, the ultraviolet light source is a point light source, a line light source or a surface light source.

[0014] In another embodiment of the present invention, the UV glue forms an insoluble and infusible solid coating film after curing.

[0015] The present invention achieves the following beneficial effects by changing the coating of the substrate glue-coated area to chemically reduced silver and improving the reflectivity of the light source through specular reflection:

[0016] (1) The operation is simple. The curing rate can be increased by 50% to 80% without any change in the curing process.

[0017] (2) The diffuse reflection of the light source is changed into specular reflection, so that the curing degree inside the curing colloid is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of an embodiment of the present invention is shown; and

[0019] Figure 2 A schematic diagram of an embodiment of the present invention is shown. Specific embodiments

[0020] In the following description, the present invention is described with reference to various embodiments. However, those skilled in the art will recognize that various embodiments may be implemented without one or more specific details or with other replacement and / or additional methods, materials or components. In other cases, well-known structures, materials or operations are not shown or described in detail to avoid obscuring the inventive point of the present invention. Similarly, for the purpose of explanation, specific quantities, materials and configurations are set forth to provide a comprehensive understanding of embodiments of the present invention. However, the present invention is not limited to these specific details.

[0021] In addition, it should be understood that the embodiments shown in the drawings are illustrative representations and are not necessarily drawn to the correct scale. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as expressing or implying relative importance. In this specification, reference to "one embodiment" or "the embodiment" means that a particular feature, structure or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention. The phrase "in one embodiment" appearing in various places in this specification does not necessarily refer to the same embodiment.

[0023] like Figure 1 As shown, in one embodiment of the present invention, the frame is a silver layer of the substrate. By replacing the traditional substrate coating with a silver layer generated by chemical reduction, the diffuse reflection of the substrate surface is changed to mirror reflection, so that the internal curing degree of the cured colloid is better.

[0024] The present invention mainly provides a structure for accelerating UV glue curing, characterized in that the structure comprises:

[0025] Substrate, coated with UV glue for curing the packaging structure;

[0026] UV glue, disposed on the substrate, for fixing the device after curing;

[0027] The mirror layer is arranged between the substrate and the UV adhesive and is used to reflect the light irradiated by the UV light source onto the mirror layer to accelerate curing.

[0028] By providing a mirror layer, such as Figure 2 The mirror layer is a silver layer formed by chemical reduction. By forming a smooth mirror surface, the UV light source is reflected to accelerate the internal curing of the UV glue.

[0029] The spectrum of the ultraviolet light source is continuous in the wavelength range of 300nm-800nm, and the main wavelengths of the ultraviolet light source are 360nm and 385nm.

[0030] When UV glue is exposed to UV radiation, the photoinitiator in the liquid UV material is stimulated to become a free radical or a cation, thereby initiating the polymerization of the polymer material (resin) containing active functional groups into an insoluble and infusible solid coating film.

[0031] Therefore, how to accelerate the curing rate of UV glue is the main technical problem solved by the present invention.

[0032] The ultraviolet light source is a metal halide lamp, a mercury lamp or an LED lamp. By strengthening the irradiation of the light source, the curing rate of the UV glue is accelerated.

[0033] The UV light source is a point light source, a line light source or a surface light source. By selecting different light source coverage, the curing rate of the UV glue can be further accelerated.

[0034] The present invention mainly improves the substrate coating by replacing the substrate coating with a mirror-reflecting silver layer, thereby replacing the diffusely-reflecting light source inside the UV glue with a mirror-reflecting light source, thereby accelerating the curing inside the UV glue.

[0035] The present invention achieves the following beneficial effects by changing the coating of the substrate glue-coated area to chemically reduced silver and improving the reflectivity of the light source through specular reflection:

[0036] (1) The operation is simple. The curing rate can be increased by 50% to 80% without any change in the curing process.

[0037] (2) The diffuse reflection of the light source is changed into specular reflection, so that the curing degree inside the curing colloid is better.

[0038] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A structure for accelerating UV adhesive curing, characterized in that: The structure comprises: Substrate, coated with UV glue for curing the packaging structure; UV glue, arranged on the substrate, for fixing the device after curing; The mirror layer is arranged between the substrate and the UV glue, and is used for reflecting the light irradiated by the UV light source on the mirror layer to accelerate the curing.

2. The accelerated UV glue curing structure according to claim 1, characterized in that: The mirror layer is a silver layer formed by chemical reduction.

3. The accelerated UV glue curing structure according to claim 1, characterized in that: The mirror layer is arranged on the area on the substrate coated with UV glue.

4. The accelerated UV glue curing structure according to claim 1, characterized in that: The structure also includes an ultraviolet light source, the spectrum of which is continuous in the wavelength range of 300nm-800nm, and the main wavelengths of which are 360nm and 385nm.

5. The structure for accelerating UV adhesive curing as claimed in claim 4, characterized in that: The ultraviolet light source is a metal halide lamp, a mercury lamp or an LED lamp.

6. The accelerated UV glue curing structure according to claim 5, characterized in that: The ultraviolet light source is a point light source, a line light source or a surface light source.

7. The accelerated UV adhesive curing structure according to claim 1, characterized in that: The UV glue forms an insoluble and infusible solid coating film after curing.

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