Copper antenna tag anti-oxidation structure and electronic tag

Abstract

The utility model belongs to the technical field of radio frequency tags, and particularly relates to a copper antenna tag anti-oxidation structure and an electronic tag. The film comprises a base material layer; the antenna layer is arranged on the base material layer; the anti-oxidation layer covers the antenna layer, and the anti-oxidation layer is provided with a hollow hole corresponding to a chip installation position of the antenna layer; the chip is arranged in the hollow hole; the protection glue covers the chip and the hollow hole. The utility model is used for solving the problem that a copper oxide film is easy to form before the copper antenna is packaged to influence the performance. The anti-oxidation layer directly covers the antenna layer to protect the antenna layer, the antenna layer is prevented from being exposed in air, the hollowed-out hole is formed in the corresponding position of the anti-oxidation layer, the chip is placed in the hollowed-out hole, the antenna layer is prevented from making contact with the air in a large range, the chip is further covered with the protection glue, and therefore the chip can be prevented from being damaged. The antenna layer is further completely protected, the antenna layer is prevented from being in contact with the outside, and the protection effect is good.

Description

Technical Field

[0001] This utility model belongs to the field of radio frequency tag technology, specifically relating to an anti-oxidation structure for copper antenna tags and electronic tags. Background Technology

[0002] Printed copper antenna tags are a type of electronic tag. Their core component is an antenna made of copper. Copper antennas utilize copper's excellent conductivity to receive and transmit signals. Using copper to make antennas can effectively reduce signal loss during transmission, improve tag reading performance, and at the same time, reduce tag manufacturing costs to some extent, and are easy to process and design.

[0003] However, because copper is a reactive metal, if it is directly exposed to the air and comes into contact with oxygen and moisture in the air for a long time, it is prone to oxidation, forming a copper oxide film. The copper oxide film will reduce the conductivity of the copper circuit and affect the reading performance of the tag.

[0004] In the general production process, the printed copper antenna still needs to undergo a chip packaging process to form an electronic tag. Before this process is completed, the copper antenna is in contact with air for a long time, which makes it easy for copper oxide film to form on the copper antenna, affecting the tag performance. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an anti-oxidation structure for copper antenna tags and electronic tags, so as to solve the problem that copper antennas are prone to forming copper oxide film before packaging, which affects performance.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A copper antenna tag anti-oxidation structure, comprising:

[0007] Substrate layer;

[0008] An antenna layer is disposed on the substrate layer;

[0009] An anti-oxidation layer is provided on the antenna layer, and the anti-oxidation layer has a cutout hole corresponding to the chip mounting position of the antenna layer;

[0010] The chip is disposed in the cutout hole;

[0011] Protective adhesive is applied to the chip and the cutout holes.

[0012] Compared with existing technologies, the above technical solutions have the following beneficial effects:

[0013] An anti-oxidation layer is directly applied over the antenna layer to protect it and prevent it from being exposed to air. Holes are made in the corresponding positions of the anti-oxidation layer to hold the chip, thus preventing the antenna layer from being exposed to air over a large area. Furthermore, a protective adhesive is applied to the outside of the chip to further protect the antenna layer completely and prevent it from coming into contact with the outside, resulting in good protection.

[0014] Based on the above technical solution, the embodiments of this application can be further improved as follows:

[0015] In one embodiment, the outer contour of the protective adhesive is not smaller than the outer contour of the perforated hole.

[0016] In one embodiment, the thickness of the anti-oxidation layer does not exceed the thickness of the chip, the bottom of the protective adhesive fills to the bottom of the cutout hole, and the top of the protective adhesive covers the top of the chip.

[0017] In one embodiment, the outer contour of the anti-oxidation layer is larger than the outer contour of the antenna layer and smaller than the outer contour of the substrate layer.

[0018] In one embodiment, the perforation is a circular or polygonal perforation.

[0019] This embodiment also provides an electronic tag that includes the above-described anti-oxidation structure.

[0020] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0021] 1. The perforated holes in the anti-oxidation layer do not affect the subsequent chip processing, while providing timely and effective anti-oxidation.

[0022] 2. The outer surface of the chip and the cutout holes are covered with protective adhesive, which further isolates the antenna layer and provides good protection for the chip. Attached Figure Description

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a top-view structural diagram of the present invention.

[0025] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction.

[0026] Figure label:

[0027] 1. Substrate layer; 2. Antenna layer; 3. Anti-oxidation layer; 4. Hole; 5. Chip; 6. Protective adhesive; Detailed Implementation

[0028] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0029] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0030] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Example 1

[0033] like Figure 1-2 As shown, the present invention provides a copper antenna tag anti-oxidation structure, which includes: a substrate layer 1, an antenna layer 2, an anti-oxidation layer 3, a chip 5, and a protective adhesive 6.

[0034] The substrate layer 1 can be selected from paper substrate or other materials according to the actual situation. The antenna layer 2 is a copper antenna layer 2. The copper antenna is printed on the substrate layer 1 by flexographic printing or screen printing to form the antenna layer 2. Then it is cured on the substrate layer 1 by infrared hot air curing or sintering curing.

[0035] The anti-oxidation layer 3 is applied to the antenna layer 2 by overprinting. The anti-oxidation layer 3 has a cutout hole 4 corresponding to the chip 5 mounting position of the antenna layer 2, which facilitates the subsequent packaging of the chip 5.

[0036] Chip 5 is disposed in the cutout hole 4 and is bonded to the antenna layer 2.

[0037] The protective adhesive 6 covers the chip 5 and the cutout hole 4. Specifically, the protective adhesive 6 can be a UV protective adhesive 6, which can be rapidly cured under ultraviolet light to form a protective layer.

[0038] An anti-oxidation layer 3 is directly covered on top of the antenna layer 2 to protect the antenna layer 2 and prevent it from being exposed to the air. At the same time, a hollow hole 4 is opened at the corresponding position of the anti-oxidation layer 3 to place the chip 5, which prevents the antenna layer 2 from being exposed to the air over a large area. Furthermore, a protective adhesive 6 is covered on the outside of the chip 5 to further completely protect the antenna layer 2 and prevent it from contacting the outside, resulting in good protection.

[0039] Specifically, the outer contour of the anti-oxidation layer 3 is larger than the outer contour of the antenna layer 2 and smaller than the outer contour of the substrate layer 1, ensuring that the anti-oxidation layer 3 completely covers the antenna layer 2.

[0040] To ensure the protective effect of the protective adhesive 6, the outer contour of the protective adhesive 6 is not smaller than the outer contour of the hollow hole 4. That is, the protective adhesive 6 not only covers the hollow hole 4, but also extends outward to connect with the anti-oxidation layer 3, completely covering the hollow hole 4 and preventing the antenna from coming into contact with the outside air from the hollow hole 4.

[0041] Furthermore, the thickness of the anti-oxidation layer 3 does not exceed the thickness of the chip 5. Since the thickness of the chip 5 is greater than that of the anti-oxidation layer 3, the chip 5 is higher than the surface of the anti-oxidation layer 3. The bottom of the protective adhesive 6 fills the bottom of the hollow hole 4, completely filling the gap between the hollow hole 4 and the chip 5. Secondly, the top of the protective adhesive 6 covers the top of the chip 5. The protective adhesive 6 can completely cover the top of the chip 5, preventing the chip 5 from contacting the outside air and playing a protective role.

[0042] Regarding the size of the cutout hole, firstly, it needs to be large enough to accommodate the chip 5; secondly, it needs to ensure that the protective adhesive 6 applied later can completely cover the cutout hole 4 and the chip 5, and completely fill the gap between the cutout hole 4 and the chip 5. In this embodiment, due to the influence of equipment precision, the diameter of the cutout hole 4 is 2-3mm. Specifically, the lower limit of the size of the cutout hole 4 needs to match the printing precision and the precision of paper shrinkage when heated. Therefore, the diameter of the cutout hole 4 needs to be no less than 2mm. The upper limit needs to match the process capability of the subsequent adhesive application equipment. Therefore, the diameter of the cutout hole 4 needs to be no greater than 3mm.

[0043] The cutout 4 can be in various forms, such as circular or polygonal, and the specific shape is not limited, as long as it can accommodate the chip 5.

[0044] Example 2

[0045] This embodiment discloses an electronic tag that includes the anti-oxidation structure in Embodiment 1. The specific effects are as described in Embodiment 1, and will not be repeated here.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-oxidation structure for a copper antenna tag, characterized in that, include: Substrate layer; An antenna layer is disposed on the substrate layer; An anti-oxidation layer is provided on the antenna layer, and the anti-oxidation layer has a cutout hole corresponding to the chip mounting position of the antenna layer; The chip is disposed in the cutout hole; Protective adhesive is applied to the chip and the cutout holes.

2. The anti-oxidation structure of the copper antenna tag according to claim 1, characterized in that, The outer contour of the protective adhesive is not smaller than the outer contour of the hollow hole.

3. The anti-oxidation structure of the copper antenna tag according to claim 2, characterized in that, The thickness of the anti-oxidation layer does not exceed the thickness of the chip, the bottom of the protective adhesive fills to the bottom of the hollow hole, and the top of the protective adhesive covers the top of the chip.

4. The anti-oxidation structure of the copper antenna tag according to claim 1, characterized in that, The outer contour of the anti-oxidation layer is larger than the outer contour of the antenna layer, but smaller than the outer contour of the substrate layer.

5. The anti-oxidation structure of the copper antenna tag according to claim 4, characterized in that, The perforated hole is circular or polygonal.

6. An electronic tag, characterized in that, Includes the anti-oxidation structure as described in any one of claims 1-5.

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