Passive UHF temperature-resistant voltage-resistant flexible anti-metal tag with temperature measurement function

Abstract

The utility model discloses a passive UHF temperature-resistant pressure-resistant flexible anti-metal tag with a temperature measurement function, which belongs to the technical field of anti-metal tag design, and comprises a polyimide adhesive tape surface material, an FPC flexible circuit board, an electromagnetic sheet, a mylar aluminum foil and release paper which are arranged from top to bottom, a chip is welded on the FPC flexible circuit board, and the chip is provided with a temperature measurement module; a through hole is formed in the electromagnetic sheet and is used for placing and protecting the chip from external pressure; the electromagnetic sheets are connected to form a bridge, the upper portion and the lower portion of the label are effectively isolated, reflection of electromagnetic waves by a metal environment is reduced, the label can still normally and effectively work on the metal surface, the chip is arranged in the hole of the electromagnetic sheet in a hole avoiding mode, and UV glue is added in the hole for potting and curing. The impact resistance of the tag chip can be improved, and a certain compression resistance effect is achieved.

Description

Technical Field

[0001] The utility model relates to a passive UHF temperature-resistant and pressure-resistant flexible anti-metal tag with a temperature measurement function, in particular to an ultra-thin flexible ultra-high frequency anti-metal electronic tag whose chip adopts an RFID temperature sensing chip, and belongs to the technical field of anti-metal tag design. Background Art

[0002] With the continuous popularization of RFID technology and the continuous development of 5G technology, in some special industrial environments, especially in application scenarios where temperature monitoring and management are required, with the characteristics of long-distance transmission of UHF RFID, especially in some special environments, such as metal, curved surface; pressure-resistant environment, temperature-resistant environment, etc. The above complex application environment has high requirements for tags. Therefore, it is necessary to design a passive UHF temperature-resistant and pressure-resistant flexible anti-metal tag with temperature measurement function to meet the needs of market applications. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the utility model provides a passive UHF temperature-resistant and pressure-resistant flexible anti-metal tag with temperature measurement function, that is, an electronic tag with ultra-high frequency long-distance transmission, temperature measurement function, high temperature resistance, pressure resistance, flexibility and metal resistance.

[0004] The purpose of the utility model is achieved through the following technical scheme: a passive UHF temperature-resistant and pressure-resistant flexible anti-metal tag with temperature measurement function, including a polyimide tape surface material, an FPC flexible circuit board, an electromagnetic sheet, Mylar aluminum foil and release paper arranged from top to bottom, the FPC flexible circuit board is welded with a chip, and the chip has a temperature measurement module; the electromagnetic sheet is provided with a through hole for placing and protecting the chip from external pressure.

[0005] White polyimide (PI) tape is used as the surface material and is set on the surface of the electronic tag. It can be printed with content, has strong adhesion, is acid and alkali resistant, and can withstand temperatures up to 260°C.

[0006] The upper and lower surfaces of the electromagnetic sheet are both provided with acrylic adhesive layers, through which the FPC flexible circuit board and the Mylar aluminum foil are adhered. The acrylic adhesive layer adopts high temperature resistant acrylic adhesive.

[0007] The chip adopts DFN packaging, which has high stability. The chip complies with ISO / IEC 18000-6CEPC Class1GEN2 protocol or optional GB / T 29768 protocol. The chip has a temperature measurement module and supports SM7 national encryption. Its operating frequency covers 920~925MHz and can adapt to 902~928MHz. The chip patch uses high temperature resistant solder paste for welding and high temperature resistant epoxy resin glue for packaging protection.

[0008] The electromagnetic sheet is provided with a through hole filled with UV glue to form a buffer structure.

[0009] The electromagnetic sheet is a high-wave-transmitting composite material with low dielectric constant and low electromagnetic loss. The electromagnetic sheet is used as a base material of the label and has good temperature resistance.

[0010] The Mylar aluminum foil is a double-layer insulating material with a special structure, composed of a high-pressure polyethylene film and an aluminum foil, and has good insulation, oxygen barrier, shielding and high temperature resistance properties; the Mylar aluminum foil serves as the metal ground of the label.

[0011] There is a back adhesive layer between the Mylar aluminum foil and the release paper, and the back adhesive layer adopts VHB tape. VHB tape is an acrylic material as a whole, which has excellent durability, solvent resistance, UV resistance, and excellent temperature resistance. In addition to these, it has high cohesive strength, good adhesion, high creep resistance and other advantages.

[0012] The utility model has the following beneficial effects: the utility model has a reasonable and simple structure, is easy to manufacture and manufacture, and is convenient to use. Through the utility model, a bridge antenna design is adopted to divide the tag antenna into two parts, namely the front FPC antenna and the back Mylar aluminum foil antenna metal ground, which are connected through the intermediate substrate electromagnetic sheet to form a bridge, effectively isolating the upper part of the tag from the lower part, reducing the reflection of electromagnetic waves by the metal environment. The tag can still work normally and effectively on the metal surface. And the electromagnetic sheet itself is a high-transmittance composite material with low dielectric constant and low electromagnetic loss, which can well achieve the impedance matching of the tag, thereby achieving the requirements of anti-interference and anti-metal. The materials used in the overall structure of the tag are all able to effectively withstand high temperatures, are flexible and bendable, and by opening a hole in the electromagnetic sheet to avoid the position, the chip of the tag is placed in the hole of the electromagnetic sheet, and UV glue is added to the hole for potting and curing. After curing, the UV glue has a certain effect of stabilizing the structure, and because it has a certain elasticity, it can improve the impact resistance of the tag chip and achieve a certain pressure resistance effect. The tag chip has a temperature measurement function, and finally realizes a passive UHF temperature-resistant and pressure-resistant flexible anti-metal tag with temperature measurement function. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0015] In the figure: 1. Polyimide tape surface material; 2. FPC flexible circuit board; 3. Acrylic adhesive layer; 4. Electromagnetic sheet; 5. Mylar aluminum foil; 6. Back adhesive layer; 7. Release paper; 8. Chip; 9. Through hole. DETAILED DESCRIPTION

[0016] The utility model will be further described below in conjunction with the accompanying drawings and the accompanying description.

[0017] A passive UHF temperature-resistant and pressure-resistant flexible anti-metal tag with temperature measurement function, comprising from top to bottom a polyimide tape surface material 1, an FPC flexible circuit board 2, an electromagnetic sheet 4, a Mylar aluminum foil 5, a backing adhesive layer 6 and a release paper 7; the FPC flexible circuit board 2 is used as a tag antenna, and a DFN packaged chip 8 is welded on the tag antenna through the SMT patch process and high-temperature resistant solder paste, and the surface of the chip 8 is sealed with epoxy resin glue to ensure its firmness. The electromagnetic sheet 4 is used as a bridge substrate of the tag to isolate the tag antenna on the front and the Mylar aluminum foil 5 on the back. The upper and lower surfaces of the electromagnetic sheet 4 are provided with acrylic adhesive layers 3, and the FPC flexible circuit board 2 and the Mylar aluminum foil 5 are pasted through the acrylic adhesive layers 3. The electromagnetic sheet 4 is provided with a through hole 9 for placing and protecting the chip 8 from external forces, and filling and encapsulating UV glue to form a buffer structure. The upper and lower acrylic adhesive layers 3 of the electromagnetic sheet 4 are used to paste and stabilize the design structure of the tag, and are specifically a high-temperature resistant acrylic pressure-sensitive adhesive, which can withstand a maximum temperature of 200°C and can be used in an environment of 150°C for a long time. The surface of the label adopts polyimide tape surface material 1, the bottom of the label adopts VHB adhesive as the backing layer, and the lowest layer of release paper 7 serves as the carrier of the entire label. When the label is torn, the release paper 7 is discarded.

[0018] The above description is only a preferred embodiment of the present invention. Any modification, equivalent replacement, improvement, etc. made to the above embodiment based on the technical essence of the present invention shall be included in the protection scope of the present invention.

Claims

1. A passive UHF temperature-resistant and pressure-resistant flexible anti-metal tag with temperature measurement function, characterized in that: The invention comprises a polyimide tape surface material (1), an FPC flexible circuit board (2), an electromagnetic sheet (4), a Mylar aluminum foil (5) and a release paper (7) arranged from top to bottom. The FPC flexible circuit board (2) is welded with a chip (8), and the chip (8) has a temperature measurement module. The electromagnetic sheet (4) is provided with a through hole (9) for accommodating and protecting the chip (8) from external pressure.

2. The passive UHF temperature-resistant and pressure-resistant flexible anti-metal tag with temperature measurement function according to claim 1 is characterized in that: The upper and lower surfaces of the electromagnetic sheet (4) are both provided with acrylic adhesive layers (3), and the FPC flexible circuit board (2) and the Mylar aluminum foil (5) are adhered via the acrylic adhesive layers (3).

3. The passive UHF temperature-resistant and pressure-resistant flexible anti-metal tag with temperature measurement function according to claim 1 is characterized in that: The chip (8) adopts a DFN packaging form, and the chip (8) operating frequency coverage range is 920-925 MHz.

4. The passive UHF temperature-resistant and pressure-resistant flexible anti-metal tag with temperature measurement function according to claim 1 is characterized in that: The electromagnetic sheet (4) is provided with a through hole (9) filled with UV glue to form a buffer structure.

5. The passive UHF temperature-resistant and pressure-resistant flexible anti-metal tag with temperature measurement function according to claim 1 is characterized in that: The electromagnetic sheet (4) is a high-wave-transmittance composite material with low dielectric constant and low electromagnetic loss, and the electromagnetic sheet serves as a base material of the label.

6. The passive UHF temperature-resistant and pressure-resistant flexible anti-metal tag with temperature measurement function according to claim 1 is characterized in that: The Mylar aluminum foil (5) is a double-layer insulating material, consisting of a high-pressure polyethylene film and an aluminum foil, and the Mylar aluminum foil serves as a metal ground of the label.

7. The passive UHF temperature-resistant and pressure-resistant flexible anti-metal tag with temperature measurement function according to claim 1 is characterized in that: A back adhesive layer (6) is provided between the Mylar aluminum foil (5) and the release paper (7), and the back adhesive layer (6) is made of VHB tape.

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