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CN-224232918-U - Etched antenna connection structure for NFC chip

CN224232918UCN 224232918 UCN224232918 UCN 224232918UCN-224232918-U

Abstract

The utility model relates to the technical field of NFC chip labels, in particular to an etching antenna connection structure for an NFC chip, which comprises a flexible substrate, wherein an etching antenna is fixedly connected to the edge of the outer wall of the flexible substrate, two terminals are fixedly connected to the inner ring of the etching antenna, a chip is fixedly connected to the middle part of the flexible substrate, two pins are fixedly connected to one side of the chip, which is close to the terminals, the chip and the pins are mutually connected, a fixing mechanism for reinforcing the joint of the terminals and the pins is arranged on one side of the chip, which is close to the terminals, and a protection mechanism for protecting the etching antenna and the chip is arranged on the top of the flexible substrate. Compared with the prior art, the structure can resist the influence of external forces such as bending, collision and pulling in the use process, prevent the connection part from loosening, breaking or falling off, avoid abnormal communication or failure, and is particularly suitable for flexible label application scenes in long-time, multi-frequency and complex environments such as logistics inventory.

Inventors

  • YU JIANSUI

Assignees

  • 江苏红炭电子科技有限公司

Dates

Publication Date
20260512
Application Date
20250815

Claims (7)

  1. 1. An etching antenna connection structure for NFC chips comprises a flexible substrate (1), an etching antenna (2) is fixedly connected to the edge of the outer wall of the flexible substrate (1), two terminals (3) are fixedly connected to the inner ring of the etching antenna (2), a chip (4) is fixedly connected to the middle part of the flexible substrate (1), two pins (5) are fixedly connected to one side, close to the terminals (3), of the chip (4), the chip (4) and the pins (5) are connected with each other, and the structure is characterized in that a fixing mechanism used for reinforcing the joint of the terminals (3) and the pins (5) is arranged on one side, close to the terminals (3), of the chip (4), and a protection mechanism used for protecting the etching antenna (2) and the chip (4) is arranged on the top of the flexible substrate (1).
  2. 2. The etched antenna connection structure for the NFC chip according to claim 1, characterized in that the fixing mechanism comprises a fixing plate (6) fixedly connected to one side close to the terminal (3), the shape of the fixing plate (6) is in a concave shape, the two sides of the top of the fixing plate (6) are provided with accommodating through grooves (7), the pins (5) are located inside the accommodating through grooves (7), an accommodating frame (8) is fixedly connected to the edge of the inner wall of the accommodating through grooves (7), and conductive adhesive (9) used for fixing the joint of the pins (5) and the terminal (3) is filled in the accommodating frame (8).
  3. 3. The etched antenna connection structure for an NFC chip according to claim 1, wherein the protection mechanism includes an epoxy resin adhesive layer (10) fixedly connected to the tops of the flexible substrate (1) and the chip (4) and used for reinforcing the etched antenna (2), the terminal (3) and the chip (4), a PI film layer (11) for protecting the etched antenna (2), the terminal (3) and the chip (4) is fixedly connected to the top of the epoxy resin adhesive layer (10), and an elastic silica gel pad (12) for preventing the chip (4) from being damaged due to compression is fixedly connected between the chip (4) and the epoxy resin adhesive layer (10).
  4. 4. An etched antenna connection structure for an NFC chip according to claim 3, characterized in that the outer wall edge of the flexible substrate (1) is fixedly connected with a PU adhesive tape (13), and the epoxy adhesive layer (10) and the PI film layer (11) are located inside the PU adhesive tape (13).
  5. 5. Etched antenna connection structure for NFC chips according to claim 1, characterized in that the bottom of the flexible substrate (1) is fixedly connected with an adhesive layer (14) for adhering to the surface of an object, and the bottom of the adhesive layer (14) is provided with a tearing piece (15).
  6. 6. Etched antenna connection structure for NFC chips according to claim 2, characterized in that the conductive glue (9) fills the interior of the receiving through-slot (7) and fills the interior space of the receiving through-slot (7) and the receiving frame (8) and wraps the connection between the terminal (3) and the pin (5).
  7. 7. The etched antenna connection structure for an NFC chip according to claim 5, wherein a side wall of the tear-off tab (15) is fixedly connected with a convenient tear-off tab (16) for tearing off the tear-off tab (15) from the bottom of the adhesive layer (14).

Description

Etched antenna connection structure for NFC chip Technical Field The utility model relates to the technical field of NFC chip tags, in particular to an etched antenna connection structure for an NFC chip. Background Near Field Communication (NFC) is a short-distance wireless communication technology and is widely applied to the fields of entrance guard identification, mobile payment, product anti-counterfeiting, logistics information statistics and the like. In order to implement NFC communication functions, it is generally necessary to provide an etched antenna on the tag substrate and electrically connect with the NFC chip, so as to complete energy reception and data signal transmission. The connection between the existing NFC chip and the etched antenna is generally electrically connected only through conductive adhesive or soldering tin and other materials, a special fixing structure is lacked, in the flexible tag application, the NFC chip is small in size and fine in bonding pad, the etched antenna terminal is generally located on the surface of a flexible substrate, and a connection area is structurally fragile. Because the connection mode mainly depends on adhesion or lamination fixation, and lacks a further limiting mechanism, if external force effects such as bending, collision and pulling are encountered in the process of checking and using a large amount of materials, the connection part is extremely easy to loose, break or fall off, so that NFC label communication is abnormal or completely invalid. The connection mode lacking structural support is difficult to meet the reliability requirement under long-time and multi-frequency use scenes, and particularly has great technical defects in the fields of logistics checking and the like needing to be subjected to complex environment test. Disclosure of utility model The utility model aims to provide an etched antenna connection structure for an NFC chip, which aims to solve the problems that the NFC tag is abnormal in communication or completely invalid due to the fact that the connection structure is electrically connected only through conductive adhesive or soldering tin and the like and lacks a special fixing structure, and if external forces such as bending, collision and pulling are encountered, the connection part is very easy to loosen, break or fall off. Based on the above object, the utility model provides an etching antenna connection structure for an NFC chip, which comprises a flexible substrate, wherein an etching antenna is fixedly connected to the edge of the outer wall of the flexible substrate, two terminals are fixedly connected to the inner ring of the etching antenna, a chip is fixedly connected to the middle part of the flexible substrate, two pins are fixedly connected to one side of the chip, which is close to the terminals, the chip and the pins are mutually connected, a fixing mechanism for reinforcing the connection part of the terminals and the pins is arranged on one side of the chip, which is close to the terminals, and a protection mechanism for protecting the etching antenna and the chip is arranged on the top of the flexible substrate. Preferably, the fixing mechanism comprises a fixing plate fixedly connected to one side close to the terminal, the fixing plate is concave, the two sides of the top of the fixing plate are provided with through grooves, the pins are located inside the through grooves, an accommodating frame is fixedly connected to the edge of the inner wall of the through grooves, and conductive adhesive used for fixing the joints of the pins and the terminal is filled in the accommodating frame. Preferably, the protection mechanism comprises an epoxy resin adhesive layer fixedly connected to the tops of the flexible substrate and the chip and used for reinforcing the etched antenna, the terminal and the chip, a PI film layer used for protecting the etched antenna, the terminal and the chip is fixedly connected to the top of the epoxy resin adhesive layer, and an elastic silica gel pad used for preventing the chip from being damaged due to compression is fixedly connected between the chip and the epoxy resin adhesive layer. Preferably, the outer wall edge of the flexible substrate is fixedly connected with a PU adhesive tape, and the epoxy resin adhesive layer and the PI film layer are positioned in the PU adhesive tape. Preferably, the bottom of the flexible substrate is fixedly connected with an adhesive layer used for being adhered to the surface of an object, and a tearing sheet is arranged at the bottom of the adhesive layer. Preferably, the conductive adhesive fills the interior of the accommodating through groove, fills the interior space of the accommodating through groove and the accommodating frame, and wraps the connection part between the terminal and the pin. Preferably, the side wall of the tearing piece is fixedly connected with a convenient tearing piece for tearing off the tearing piece