CN110137679B - NFC antenna device and manufacturing method thereof - Google Patents
NFC antenna device and manufacturing method thereof Download PDFInfo
- Publication number
- CN110137679B CN110137679B CN201910393480.5A CN201910393480A CN110137679B CN 110137679 B CN110137679 B CN 110137679B CN 201910393480 A CN201910393480 A CN 201910393480A CN 110137679 B CN110137679 B CN 110137679B
- Authority
- CN
- China
- Prior art keywords
- coil
- fpc board
- contact point
- nfc antenna
- fpc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 47
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 18
- 239000000758 substrate Substances 0.000 claims abstract description 16
- 239000004411 aluminium Substances 0.000 claims abstract 4
- 239000000463 material Substances 0.000 claims description 19
- 239000003292 glue Substances 0.000 claims description 6
- 239000013039 cover film Substances 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 239000010408 film Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000003475 lamination Methods 0.000 abstract 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 14
- 239000005020 polyethylene terephthalate Substances 0.000 description 14
- -1 Polyethylene terephthalate Polymers 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Details Of Aerials (AREA)
Abstract
The invention discloses an NFC antenna and a manufacturing method thereof, and belongs to the technical field of antennas. The device includes ferrite layer, coil pack and the FPC subassembly that the lamination set up in proper order, and the coil pack includes PET substrate layer and sets up the aluminium coil on the substrate layer, and aluminium coil's both ends are provided with the coil contact. The FPC assembly comprises a double-sided FPC board and two connecting wires arranged on the FPC board, wherein two ends of the two connecting wires are respectively provided with an inner contact point connected with an aluminum coil and an outer contact point connected with an external circuit, and the main body of the structure of the FPC board is a square structure with two inner contact points as diagonal points. According to the NFC antenna device, the size of the FPC is reduced, and the coil layer is made of the aluminum coil, so that the production cost of the NFC antenna device is reduced.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to an NFC antenna and a manufacturing method thereof.
Background
Conventional NFC (NEAR FIELD communication) antennas are usually formed by bonding a ferrite layer and a double-sided FPC board (Flexible Printed Circuit Board, flexible circuit board), wherein the double-sided FPC board is formed by laminating an insulating cover film on a double-sided substrate after forming a coil pattern by etching, the size of the double-sided FPC board is larger and almost equal to that of the ferrite layer, and the coil layer is made of a coil made of copper or silver, which results in higher production cost.
Disclosure of Invention
In view of the above, the present invention aims to solve the existing technical problems, and provide an NFC antenna with low cost and optimized structure and a manufacturing method thereof.
In order to achieve the above object, according to one aspect of the present invention, there is provided an NFC antenna, including a ferrite layer, a coil assembly and an FPC assembly, which are sequentially stacked from bottom to top, the coil assembly including a base material layer and an aluminum coil disposed on the base material layer, coil contacts being disposed at two ends of the aluminum coil, the ferrite layer being bonded to a side of the base material layer on which the aluminum coil is not disposed; the FPC assembly comprises an FPC board and two connecting wires arranged on the FPC board, the FPC board is a double-sided FPC board, two ends of the connecting wires are respectively provided with an inner contact point connected with the aluminum coil and an outer contact point connected with an external circuit, the inner contact point is connected with the coil contact, and an insulating covering film is attached to the outer layer of the FPC board, which is provided with the two connecting wires.
Further, the aluminum coil is arranged on the base material layer in a square spiral shape with gradually reduced side length.
Further, coil contacts at both ends of the aluminum coil are located near the same corner of the base material layer.
Further, the main structure of the FPC board is a square structure with two inner contact points as diagonal points.
Further, one corner of the square structure of the main body of the FPC board is aligned with the corner of the substrate layer where the coil contact is located, and the side length of the square structure of the main body of the FPC board is smaller than one half of the length of the short side of the substrate layer.
Further, the material of the substrate layer is PET (Polyethylene terephthalate, polyethylene terephthalate plastic).
Further, conductive glue is also coated between the inner contact point and the coil contact.
On the other hand, the invention also provides a manufacturing method of the NFC antenna, which comprises the following steps:
A1: preparing a PET plate as a base material layer, etching a square spiral aluminum coil with gradually reduced side length on the PET plate, and arranging coil contacts at two ends of the aluminum coil;
A2: manufacturing a double-sided FPC board, etching two connecting wires on the same surface of the FPC board, respectively arranging an inner contact point connected with the aluminum coil and an outer contact point connected with an external circuit at two ends of the two connecting wires, attaching an insulating cover film on the outer side of the FPC board, which is etched with the two connecting wires, and connecting the FPC board in a pressing mode;
a3: coating conductive glue between the coil contact on the aluminum coil and an inner contact point on the FPC board, pressing the side, with the aluminum coil, of the PET board formed in the step A1 and the side, with the inner contact point, of the FPC board formed in the step A2 at a certain temperature, and connecting the inner contact point on the FPC board with the coil contact on the aluminum coil;
a4: and C, sticking ferrite on one side, far away from the aluminum coil, of the PET plate formed after the step A3 is completed, and bonding the ferrite and the PET plate through double faced adhesive tape.
Further, in the step A1, the line width of the aluminum coil is 0.6-1.3mm, and the line spacing is 0.5-1.0mm.
Further, the temperature condition described in step A3 is 80-120 degrees.
By adopting the technical scheme, the invention achieves the following technical effects:
the structure of the FPC board used by the NFC antenna is a square structure with two inner contact points as diagonal points, the side length of the square structure of the main body of the FPC board is smaller than one half of the short side length of the base material layer, the size of the FPC board is obviously smaller than that of the base material layer, and the coil layer is made of aluminum coils, so that the production cost of the NFC antenna device is reduced.
Drawings
Fig. 1 is a schematic exploded view of a structure of an NFC antenna.
Fig. 2 is a schematic structural view of the FPC assembly.
Fig. 3 is a front view of the NFC antenna.
In the accompanying drawings: 1-ferrite layer, 2-coil assembly, 21-substrate layer, 22-aluminum coil, 23-coil contact, 3-FPC assembly, 31-FPC board, 32-connecting wire, 33-inner contact, 34-outer contact, 35-insulating cover film, 4-double faced adhesive tape.
Detailed Description
Embodiments of the present invention are further described below with reference to the accompanying drawings.
Referring to fig. 1 to 3, there is provided an NFC antenna including a ferrite layer 1, a coil assembly 2, and an FPC assembly 3 sequentially stacked from bottom to top. The coil block 2 includes a base material layer 21 and an aluminum coil 22 provided on the base material layer 21, the aluminum coil 22 being provided on the base material layer 21 in a square spiral shape with a side length gradually reduced. The aluminum coil 22 is provided with coil contacts 23 at both ends, and the two coil contacts 23 are located near the same corner of the base material layer 21.
In this embodiment, the material of the base material layer 21 is PET, the ferrite layer 1 is ferrite, and the ferrite layer 1 is bonded to the side of the base material layer 21 on which the aluminum coil 22 is not provided.
The FPC assembly 3 includes an FPC board 31 and two connection wires 32 provided on the FPC board 31, both ends of the two connection wires 32 being respectively provided with an inner contact point 33 connected with the aluminum coil 22 and an outer contact point 34 connected with an external circuit. The FPC board 31 is a double-sided FPC board 31, the main structure of the FPC board 31 is a square structure, the side length of the square structure is smaller than one half of the short side length of the substrate layer, the inner contact point 33 is disposed at a pair of corners of the square structure of the main body of the FPC board 31, and a protruding portion is further disposed at an upper portion of the square structure of the main body of the FPC board 31 for providing the outer contact point 34. One corner of the square structure of the main body of the FPC board 31 is aligned with the corner of the base material layer 21 where the coil contact 23 is located. Conductive glue (not shown) is applied between the inner contact points 33 and the coil contacts 23, and the FPC board 31 is attached with an insulating cover film 35 on the outer layer provided with two connection wires 32.
Referring to fig. 1-3, the present embodiment further provides a method for manufacturing an NFC antenna, including the following steps:
A1: a PET plate is prepared as a base material layer 21, a square spiral aluminum coil 22 with a side length gradually decreasing is etched on the PET plate, the line width of the aluminum coil 22 is 0.6-1.3mm, the line spacing is 0.5-1.0mm, and coil contacts 23 are arranged at two ends of the aluminum coil 22.
A2: two connecting wires 32 are etched on the same surface of the FPC board 31, two ends of the two connecting wires 32 are respectively provided with an inner contact point 33 connected with the aluminum coil 22 and an outer contact point 34 connected with an external circuit, and insulating cover films 35 are attached to the outer sides of the two connecting wires 32 etched on the FPC board 31 and connected with the FPC board 31 in a pressing mode.
A3: a conductive glue (not shown) is applied between the coil contact 23 on the aluminum coil 22 and the inner contact point 33 on the FPC board 31, the side of the PET board formed in step A1 with the aluminum coil 22 and the side of the FPC board 31 formed in step A2 with the inner contact point 33 are pressed together at a temperature of 80-120 degrees, and the inner contact point 33 on the FPC board 31 is connected with the coil contact 23 on the aluminum coil 22.
A4: and (3) sticking ferrite on one side of the PET plate far away from the aluminum coil 22 after the step A3 is finished, and bonding the ferrite and the PET plate through a double faced adhesive tape 4.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (7)
1. The NFC antenna is characterized by comprising a ferrite layer, a coil assembly and an FPC assembly which are sequentially laminated from bottom to top, wherein the coil assembly comprises a substrate layer and an aluminum coil arranged on the substrate layer, coil contacts are arranged at two ends of the aluminum coil, and the ferrite layer is adhered to one side of the substrate layer, on which the aluminum coil is not arranged; the FPC assembly comprises an FPC board and two connecting wires arranged on the FPC board, the FPC board is a double-sided FPC board, two ends of the two connecting wires are respectively provided with an inner contact point connected with the aluminum coil and an outer contact point connected with an external circuit, the inner contact point is connected with the coil contact, and an insulating covering film is adhered to the outer layer of the FPC board, which is provided with the two connecting wires;
the main body structure of the FPC board is a square structure taking two inner contact points as diagonal points;
one corner of the square structure of the main body of the FPC board is aligned with the corner of the substrate layer where the coil contact is located, and the side length of the square structure of the main body of the FPC board is smaller than one half of the short side length of the substrate layer;
And conductive glue is further coated between the inner contact point and the coil contact point.
2. An NFC antenna according to claim 1 wherein the aluminium coil is arranged in a square spiral shape with progressively smaller sides on the substrate layer.
3. An NFC antenna according to claim 1 or claim 2 wherein the coil contacts at both ends of the aluminium coil are located at the same corner adjacent the substrate layer.
4. An NFC antenna according to claim 1 wherein the substrate layer is PET.
5. A method of manufacturing an NFC antenna according to any one of claims 1 to 4, comprising the steps of:
A1: preparing a PET plate as a base material layer, etching a square spiral aluminum coil with gradually reduced side length on the PET plate, and arranging coil contacts at two ends of the aluminum coil;
A2: manufacturing a double-sided FPC board, etching two connecting wires on the same surface of the FPC board, respectively arranging an inner contact point connected with the aluminum coil and an outer contact point connected with an external circuit at two ends of the two connecting wires, attaching an insulating cover film on the outer side of the FPC board, which is etched with the two connecting wires, and connecting the FPC board in a pressing mode;
a3: coating conductive glue between the coil contact on the aluminum coil and an inner contact point on the FPC board, pressing the side, with the aluminum coil, of the PET board formed in the step A1 and the side, with the inner contact point, of the FPC board formed in the step A2 at a certain temperature, and connecting the inner contact point on the FPC board with the coil contact on the aluminum coil;
a4: and C, sticking ferrite on one side, far away from the aluminum coil, of the PET plate formed after the step A3 is completed, and bonding the ferrite and the PET plate through double faced adhesive tape.
6. The method of manufacturing an NFC antenna according to claim 5, wherein in step A1, the line width of the aluminum coil is 0.6-1.3mm and the line spacing is 0.5-1.0mm.
7. The method of manufacturing an NFC antenna according to claim 5, wherein the temperature condition in step A3 is 80-120 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910393480.5A CN110137679B (en) | 2019-05-13 | 2019-05-13 | NFC antenna device and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910393480.5A CN110137679B (en) | 2019-05-13 | 2019-05-13 | NFC antenna device and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110137679A CN110137679A (en) | 2019-08-16 |
| CN110137679B true CN110137679B (en) | 2024-04-19 |
Family
ID=67573325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910393480.5A Active CN110137679B (en) | 2019-05-13 | 2019-05-13 | NFC antenna device and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110137679B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114497985B (en) * | 2022-02-24 | 2024-08-16 | 深圳市卓睿通信技术有限公司 | NFC antenna and terminal |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101444905B1 (en) * | 2014-01-13 | 2014-09-26 | 일신전자 주식회사 | Antenna for near field communication |
| CN105490009A (en) * | 2016-02-03 | 2016-04-13 | 深圳市信维通信股份有限公司 | Orthogonal winding type patch NFC antenna and antenna system |
| CN105826664A (en) * | 2015-09-07 | 2016-08-03 | 维沃移动通信有限公司 | Method for making antenna and antenna structure |
| CN106252827A (en) * | 2016-09-19 | 2016-12-21 | 武汉天喻聚联网络有限公司 | A kind of modified form radio-frequency antenna and production technology thereof |
| CN208423179U (en) * | 2018-06-21 | 2019-01-22 | 深圳市信维通信股份有限公司 | A kind of NFC antenna structure |
| CN209981458U (en) * | 2019-05-13 | 2020-01-21 | 湖南韩顺电子科技有限公司 | NFC antenna |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9912058B2 (en) * | 2014-10-21 | 2018-03-06 | Infineon Technologies Ag | Hybrid antenna, antenna arrangement and method for manufacturing an antenna arrangement |
-
2019
- 2019-05-13 CN CN201910393480.5A patent/CN110137679B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101444905B1 (en) * | 2014-01-13 | 2014-09-26 | 일신전자 주식회사 | Antenna for near field communication |
| CN105826664A (en) * | 2015-09-07 | 2016-08-03 | 维沃移动通信有限公司 | Method for making antenna and antenna structure |
| CN105490009A (en) * | 2016-02-03 | 2016-04-13 | 深圳市信维通信股份有限公司 | Orthogonal winding type patch NFC antenna and antenna system |
| CN106252827A (en) * | 2016-09-19 | 2016-12-21 | 武汉天喻聚联网络有限公司 | A kind of modified form radio-frequency antenna and production technology thereof |
| CN208423179U (en) * | 2018-06-21 | 2019-01-22 | 深圳市信维通信股份有限公司 | A kind of NFC antenna structure |
| CN209981458U (en) * | 2019-05-13 | 2020-01-21 | 湖南韩顺电子科技有限公司 | NFC antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110137679A (en) | 2019-08-16 |
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