WO2015122574A1 - Méthode de fabrication d'antenne nfc pour terminal portable - Google Patents

Méthode de fabrication d'antenne nfc pour terminal portable Download PDF

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Publication number
WO2015122574A1
WO2015122574A1 PCT/KR2014/004783 KR2014004783W WO2015122574A1 WO 2015122574 A1 WO2015122574 A1 WO 2015122574A1 KR 2014004783 W KR2014004783 W KR 2014004783W WO 2015122574 A1 WO2015122574 A1 WO 2015122574A1
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WO
WIPO (PCT)
Prior art keywords
forming
nfc antenna
case
circuit
plating layer
Prior art date
Application number
PCT/KR2014/004783
Other languages
English (en)
Korean (ko)
Inventor
박인성
장승준
이성형
Original Assignee
주식회사 유텍솔루션
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 주식회사 유텍솔루션 filed Critical 주식회사 유텍솔루션
Publication of WO2015122574A1 publication Critical patent/WO2015122574A1/fr

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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
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • 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
    • H01Q7/04—Screened antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna

Definitions

  • the present invention relates to a method for manufacturing an NFC antenna for a mobile terminal, and more particularly, to a method for manufacturing an NFC antenna for a mobile terminal capable of forming an NFC antenna directly on a case of a mobile terminal or a battery pack case for a mobile terminal.
  • NFC Near Field Communication
  • RFID radio frequency identification
  • Such NFC is widely used not only for payment but also for transmitting goods information or travel degree for visitors, traffic access control locks in supermarkets or general stores.
  • the conventional NFC antenna manufacturing method for a mobile terminal uses an NFC antenna having a loop-shaped circuit pattern formed on a separate substrate such as a flexible printed circuit board (FPCB). It is made by attaching to the case of the portable terminal or the case of the battery pack for the portable terminal, it is very inconvenient to attach the NFC antenna manufactured separately from the portable terminal to the portable terminal again, which makes the manufacturing process complicated. There is a problem that the manufacturing cost rises.
  • FPCB flexible printed circuit board
  • the present invention is to solve the above problems, a mobile terminal that can form the NFC antenna in the case of the portable terminal or the battery pack case for the portable terminal directly without the need to reattach the NFC antenna prepared separately to the portable terminal Provides a method for manufacturing NFC antenna for.
  • NFC antenna manufacturing method for a mobile terminal comprises a case preparation step of preparing a mobile terminal case or a battery pack case for a mobile terminal; Forming a hydrophobic film on the entire surface of the case by immersing the case in an aqueous hydrophobic material solution; Irradiating a laser to the NFC antenna circuit pattern region of the case after the hydrophobic film forming step to remove the hydrophobic film on the surface of the circuit pattern region and to roughen the surface roughness of the circuit pattern region; An NFC antenna circuit forming step of forming a circuit forming plating layer on the circuit pattern region by electroless plating after the laser irradiation step; And a ferrite sheet attaching step of attaching a ferrite sheet to the case to cover the circuit forming plating layer after the NFC antenna circuit forming step.
  • the case preparation step the step of injection molding the case so that a groove is formed in the NFC antenna terminal forming region of the case, the NFC antenna manufacturing method for a mobile terminal, before the NFC antenna circuit forming step In the groove may further include an NFC antenna terminal forming step of inserting the NFC antenna terminal forming pin into the groove.
  • the NFC antenna circuit forming step the first seed forming step of forming a paradium seed in the circuit pattern region; A circuit forming step of forming a circuit forming copper plating layer in the circuit pattern region after the first seed forming step; A second seed forming step of forming a paradium seed on the circuit forming copper plating layer after the circuit forming step; And a circuit protection layer forming step of forming a circuit protection nickel plating layer on the circuit forming copper plating layer on which the paradium seed is formed after the secondary seed forming step.
  • the case is immersed in a palladium aqueous solution having a palladium concentration of 60 to 200 ppm to form palladium seed in the circuit pattern region, and the secondary seed forming step is to dig the case. It is preferable to form a paradium seed in the said circuit formation copper plating layer by immersing in the aqueous paradium solution which consists of 20-40 ppm of radium concentrations.
  • the circuit forming step may include: forming a metal thin film plating layer on the circuit pattern region; After the metal thin film forming step, the soft etching step to fine-tune the edge of the metal thin film plating layer; And a copper plating layer forming step of forming the circuit forming copper plating layer on the metal thin film plating layer after the soft etching step.
  • the case is immersed in an aqueous copper sulfate solution for 10 to 20 minutes to form a metal thin film copper plating layer in the circuit pattern region, and the soft etching step is immersed in the soft etching solution for 20 to 40 seconds.
  • the edge of the metal thin copper plating layer is finely formed, and the copper plating layer forming step may be performed by immersing the case in copper sulfate aqueous solution for 180 to 240 minutes to form the circuit forming copper plating layer on the metal thin copper plating layer.
  • the method of manufacturing an NFC antenna for a mobile terminal may further include an ultrasonic degreasing step of removing dust generated in the laser irradiation step between the laser irradiation step and the NFC antenna circuit forming step.
  • an NFC antenna may be directly formed on a case of a mobile terminal or a battery pack case for a mobile terminal without the need to reattach the NFC antenna separately prepared to the portable terminal as in the prior art.
  • the manufacturing process for providing the NFC antenna in the mobile terminal can be simplified, thereby reducing the manufacturing cost.
  • FIG. 1 is a view schematically showing a method for manufacturing an NFC antenna for a mobile terminal according to the present invention
  • FIG. 2 is a photograph showing an example of an NFC antenna for a mobile terminal
  • FIG 3 is a photograph showing a state in which the NFC antenna circuit pattern is formed on the inner surface of the rear case of the mobile terminal by the manufacturing method according to the present invention.
  • FIG. 1 is a view schematically showing a method for manufacturing an NFC antenna for a mobile terminal according to the present invention.
  • the NFC antenna manufacturing method for a mobile terminal is a case preparation step (S10), hydrophobic film forming step (S20), laser irradiation step (S30), NFC antenna circuit forming step (S40), ferrite Sheet attaching step (S50) is included.
  • the case preparing step (S10) is a step of preparing a case which is a part of a mobile terminal to form an NFC antenna, the case is preferably a case forming the appearance of the case or the battery pack for a mobile terminal of the mobile terminal. Do.
  • the method of manufacturing an NFC antenna for a portable terminal relates to a method for directly forming an NFC (Near Field Communication) antenna, that is, an antenna for short range wireless communication, in a portable terminal. Therefore, there is a need for a part of the portable terminal to form the NFC antenna, the present invention uses a case of the appearance of the portable terminal or the case of the battery pack for the portable terminal as the part.
  • the NFC antenna is preferably formed on the inner side of the rear case forming the rear appearance of the mobile terminal.
  • the case is a part constituting a part of the portable terminal, the shape can be made in a complex and various, so the case is preferably manufactured by injection molding that can be easily mass-produced in a complex and various shapes.
  • the material of the case is a thermoplastic resin such as PC (Polycarbonate) resin, polyester resin, ABS (Acrylonitrile-Butadiene-Styrene) resin, PC / ABS resin mixture, polyamide resin, modified polyphenylene ether resin , Liquid crystal polymer, engineering plastic, PC / GF (Poly-carbonate + Glassfiber) and the like can be used.
  • the hydrophobic film forming step (S20) is a step of forming a hydrophobic film on the entire surface of the case by immersing the case in an aqueous hydrophobic material solution
  • the laser irradiation step (S30) after the hydrophobic film forming step (S20) NFC of the case Irradiating a laser to the antenna circuit pattern region to remove the hydrophobic film on the surface of the circuit pattern region and at the same time roughening the surface roughness of the circuit pattern region
  • the NFC antenna circuit forming step (S40) is the laser irradiation step (S30) Thereafter, forming a circuit forming plating layer in the circuit pattern region by electroless plating, and attaching the ferrite sheet (S50) covers the circuit forming plating layer after the NFC antenna circuit forming step (S40). In this step, a ferrite sheet is attached to the case.
  • NFC antenna manufacturing method for a mobile terminal in order to form an NFC antenna directly on the portable terminal without the need to attach the NFC antenna formed on a separate substrate to the portable terminal as in the prior art, a case which is a part of the portable terminal Directly forming the circuit forming plating layer to form the NFC antenna circuit by electroless plating (NFC antenna circuit forming step (S40)), for this purpose, the hydrophobic film forming step (S20) before the NFC antenna circuit forming step (S40) And the laser irradiation step (S30).
  • the circuit of the fine NFC antenna may be directly formed on the case surface using only electroless plating. Can be.
  • the electroless plating solution penetrates only the circuit pattern region to form a circuit forming plating layer only on the surface thereof, whereas the laser is not irradiated on the surface of the case and covered with a hydrophobic film. This is because the surface of the electroless plating solution does not penetrate and no plating layer is formed.
  • the hydrophobic film on the surface of the circuit pattern region is removed at the same time as the laser irradiation step (S30) and the surface roughness is roughened, even if the case is made of a plastic material which is difficult to electrolessly plate (generally a mobile terminal)
  • the portable terminal case or the battery pack case for the portable terminal, which is a part of the product, is made of a plastic material that is easily injection molded.)
  • a circuit forming plating layer can be formed in the circuit pattern region.
  • the aqueous solution of hydrophobic material may be a thioacetal compound aqueous solution, a polyfluorocarbon aqueous solution, an oxyethylated sorbitan monolaurate aqueous solution, or the like, and the ferrite sheet is a magnetic absorber for improving the operational reliability of the NFC antenna.
  • FIG. 2 is a photograph showing an example of an NFC antenna for a mobile terminal, and is a photograph schematically showing a state in which an NFC antenna is provided on an inner side surface of a rear case of the portable terminal.
  • the NFC antenna 1 when the NFC antenna 1 is provided on the inner side of the rear case 2 of the mobile terminal, when the rear case 2 is coupled to the mobile terminal, the NFC antenna 1 is coupled to the mobile terminal.
  • An NFC antenna terminal 4 is formed to allow the main body 3 of the portable terminal and the NFC antenna 1 to be electrically connected to each other.
  • Two NFC antenna terminals 4 are formed at one end and the other end of the NFC antenna circuit 5 having a loop circuit pattern.
  • the NFC antenna terminal 4 is formed from the ferrite sheet 7 so that the rear case 2 is easily contacted with the contact terminal 6 of the main body 3 of the mobile terminal when the rear case 2 is coupled to the main body 3 of the mobile terminal. It can be protruding.
  • the case preparation step (S10) is injection molding step of injection molding the case so that a groove is formed in the NFC antenna terminal forming region of the case Includes
  • NFC antenna manufacturing method for a mobile terminal according to the present invention may further comprise the NFC antenna terminal forming step of inserting the NFC antenna terminal forming pin into the groove. Then, the NFC antenna terminal can be easily formed in the case.
  • the terminal forming step is preferably performed between the hydrophobic film forming step (S20) and the NFC antenna circuit forming step (S40) to be made before the NFC antenna circuit forming step (S40). Then, in the NFC antenna circuit forming step (S40), since the electroless plating is performed while the terminal forming pin is inserted into the groove, the circuit forming plating layer formed during the electroless plating is inserted into the groove. It may also be formed on the forming pin. When the circuit forming plating layer is formed on the terminal forming pin during the electroless plating, the electrical connection between the NFC antenna terminal and the NFC antenna circuit can be made automatically, and the terminal forming pin inserted into the groove is formed in the circuit. It can be firmly fixed while being integral with the plating layer.
  • the method of manufacturing an NFC antenna for a mobile terminal according to the present invention is such that the terminal forming step may be simultaneously performed in the injection molding step, wherein the injection molding step is coupled to the NFC antenna terminal forming area of the case.
  • the NFC antenna circuit forming step S40 includes a first seed forming step, a circuit forming step, a second seed forming step, and a circuit protection layer forming step.
  • the first seed forming step is a step of forming a palladium (Pd) seed in the circuit pattern region
  • the circuit forming step is a circuit in the circuit pattern region where the palladium seed is formed after the first seed formation step Forming a copper plating layer
  • the secondary seed forming step is a step of forming a paradium seed in the copper plating layer after the circuit forming step
  • the circuit protection layer forming step is a second seed forming step, Forming a circuit protection nickel plating layer on the circuit forming copper plating layer on which the palladium seed is formed.
  • the first seed forming step is a step for facilitating the formation of an electroless copper plating layer for forming a circuit of the NFC antenna in the circuit pattern region. It can be made by immersion in an aqueous solution of radium or an aqueous solution of palladium chloride. As such, when the case irradiated with the laser only in the circuit pattern region is immersed in the palladium aqueous solution, palladium seed may be formed only in the circuit pattern region.
  • the secondary palladium seed forming step is to facilitate the formation of a circuit protection nickel plating layer on the circuit-forming copper plating layer, it may be made by immersing the case in which the palladium seed is formed in the copper plating layer in an electroless nickel plating solution. .
  • an electroless nickel plating layer is further formed on the circuit pattern region in which the electroless copper plating layer is formed so as to improve the conductivity and corrosion resistance of the copper plating layer forming the circuit of the NFC antenna so that the function as the NFC antenna can be made smoothly. It's a step. This may be made possible by the step of forming the secondary palladium seed between the circuit forming step and the circuit protection layer forming step.
  • the primary seed forming step is a step of physically forming a paradium seed on the surface roughened by laser irradiation, the palladium concentration of the aqueous solution of palladium in the primary seed forming step is made of 60 ⁇ 200ppm
  • the secondary seed forming step is a step of chemically forming a paradium seed in the copper plating layer, it is preferable that the palladium concentration of the aqueous solution of palladium in the secondary seed forming step is made of 20 ⁇ 40ppm.
  • the circuit forming step is a step of forming a copper plating layer forming a circuit of the NFC antenna, it may be made including a metal thin film forming step, soft etching step and copper plating layer forming step.
  • the metal thin film forming step is a step of forming a metal thin film plating layer in the circuit pattern region on which the palladium seed is formed
  • the soft etching step is a step of making a fine edge of the metal thin film plating layer after the metal thin film forming step
  • the circuit forming copper plating layer is formed on the metal thin plated layer having a fine edge.
  • the metal thin film forming step and the soft etching step may be further performed to form a fine NFC antenna circuit.
  • the metal thin film forming step may be performed by immersing the case where the paradium seed is formed only in the circuit pattern region in the copper sulfate aqueous solution for 10 to 20 minutes, and the soft etching step is 20 ⁇ 20 ⁇ the case in which the metal thin film copper plating layer is formed in the soft etching solution. It may be made by immersing for 40 seconds, the copper plating layer forming step may be made by immersing the case in which the edge of the metal thin film copper plating layer is fine in the copper sulfate aqueous solution for 180 to 240 minutes. In another embodiment, the metal thin film forming step may be immersed in an electroless nickel aqueous solution to form a metal thin nickel plated layer.
  • NFC antenna manufacturing method for a mobile terminal according to the present invention between the laser irradiation step (S30) and the NFC antenna circuit forming step 40, the ultrasonic degreasing step of removing dust generated in the laser irradiation step (S30). It may further include.
  • FIG 3 is a photograph showing a state in which the NFC antenna circuit pattern is formed on the inner surface of the rear case of the mobile terminal by the manufacturing method according to the present invention.
  • the method of manufacturing an NFC antenna for a portable terminal may directly form a terminal 4 and a circuit 5 constituting the NFC antenna 1 on a case 2 which is a part of the portable terminal.
  • the NFC antenna circuit (5) consisting of a fine loop circuit pattern can also be directly formed on the surface of the case (2).
  • the NFC antenna manufacturing method forms an NFC antenna on a case of a portable terminal or a battery pack case for a portable terminal directly without the need to reattach the NFC antenna prepared separately to the portable terminal.
  • the present invention may be modified in various forms. Therefore, the present invention is not limited to the embodiments disclosed in the present specification, and all forms changeable by those skilled in the art to which the present invention pertains will belong to the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Set Structure (AREA)

Abstract

La présente invention concerne une méthode de fabrication d'une antenne NFC pour un terminal portable et, en particulier, une méthode de fabrication d'une antenne NFC pour un terminal portable, capable de former directement l'antenne NFC sur le boîtier du terminal portable ou le boîtier de la batterie du terminal portable. La méthode de fabrication d'une antenne NFC pour un terminal portable, selon la présente invention, comprend : une étape de préparation de boîtier permettant de préparer le boîtier du terminal portable ou le boîtier de la batterie pour le terminal portable ; une étape de formation de film hydrophobe permettant de former un film hydrophobe sur toute la surface du boîtier en trempant le boîtier dans une solution aqueuse de matériau hydrophobe ; une étape d'exposition à un rayonnement laser permettant d'exposer au rayonnement d'un laser une région de motif de circuit d'antenne NFC du boîtier après l'étape de formation de film hydrophobe de façon à enlever le film hydrophobe sur la surface de la région de motif de circuit et simultanément, dépolir la surface de la région de motif de circuit ; une étape de formation de circuit d'antenne NFC permettant de former une couche de placage de formation de circuit dans la région de motif de circuit par dépôt autocatalytique après l'étape d'exposition au rayonnement laser ; et une étape de fixation de feuille de ferrite permettant d'attacher une feuille de ferrite au boîtier de façon à recouvrir la couche de placage de formation de circuit après l'étape de formation de circuit d'antenne NFC.
PCT/KR2014/004783 2014-02-12 2014-05-28 Méthode de fabrication d'antenne nfc pour terminal portable WO2015122574A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020140016291A KR101392881B1 (ko) 2014-02-12 2014-02-12 휴대단말기용 ｎｆｃ 안테나 제조방법
KR10-2014-0016291 2014-02-12

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WO2015122574A1 true WO2015122574A1 (fr) 2015-08-20

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Publication number Priority date Publication date Assignee Title
KR101595026B1 (ko) 2014-05-16 2016-02-26 권석근 Nfc 안테나용 에프피씨비(fpcb) 및 이의 제조 방법

Citations (3)

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Publication number Priority date Publication date Assignee Title
KR101281194B1 (ko) * 2010-08-23 2013-07-02 현동훈 안테나가 인쇄된 휴대폰 케이스 및 그 제조방법
KR101290670B1 (ko) * 2013-06-03 2013-07-29 구본술 도금 신뢰성 향상 기능을 갖는 내장형 안테나 제조방법
KR101312170B1 (ko) * 2012-09-24 2013-09-26 김병삼 발수 마스킹층과 레이저 에칭법을 이용한 휴대 단말기용 안테나의 제조방법 및 이를 이용하여 제작된 휴대 단말기용 안테나.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101356356B1 (ko) 2012-09-19 2014-01-27 김병삼 레이저 에칭법을 이용한 휴대 단말기용 안테나의 제조방법 및 이를 이용하여 제작된 휴대 단말기용 안테나.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101281194B1 (ko) * 2010-08-23 2013-07-02 현동훈 안테나가 인쇄된 휴대폰 케이스 및 그 제조방법
KR101312170B1 (ko) * 2012-09-24 2013-09-26 김병삼 발수 마스킹층과 레이저 에칭법을 이용한 휴대 단말기용 안테나의 제조방법 및 이를 이용하여 제작된 휴대 단말기용 안테나.
KR101290670B1 (ko) * 2013-06-03 2013-07-29 구본술 도금 신뢰성 향상 기능을 갖는 내장형 안테나 제조방법

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