WO2023211008A1 - Procédé de fabrication de motif d'antenne - Google Patents

Procédé de fabrication de motif d'antenne Download PDF

Info

Publication number
WO2023211008A1
WO2023211008A1 PCT/KR2023/004814 KR2023004814W WO2023211008A1 WO 2023211008 A1 WO2023211008 A1 WO 2023211008A1 KR 2023004814 W KR2023004814 W KR 2023004814W WO 2023211008 A1 WO2023211008 A1 WO 2023211008A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal sheet
antenna pattern
half groove
sheet
manufacturing
Prior art date
Application number
PCT/KR2023/004814
Other languages
English (en)
Korean (ko)
Inventor
노진원
정의진
정을영
임기상
맹주승
Original Assignee
주식회사 아모텍
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
Priority claimed from KR1020220053603A external-priority patent/KR102720898B1/ko
Application filed by 주식회사 아모텍 filed Critical 주식회사 아모텍
Publication of WO2023211008A1 publication Critical patent/WO2023211008A1/fr

Links

Images

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
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • 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
    • H01Q7/06—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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
    • H05K3/4038—Through-connections; Vertical interconnect access [VIA] connections

Definitions

  • the present invention relates to a method of manufacturing an antenna pattern, and more specifically, to a method of manufacturing a loop-shaped antenna pattern that is mounted on a portable terminal and used for wireless power transmission and reception or communication.
  • high-output wireless charging applies a higher voltage to the antenna and substrate for wireless power transmission/reception, which can reduce charging efficiency or, in extreme cases, cause a fire.
  • Coil winding method, pattern printing method, and hybrid method are mainly used to manufacture antennas for wireless power transmission/reception.
  • the conventional manufacturing method cannot precisely form the line spacing (or line width) of the pattern when the thickness of the antenna becomes thick. Accordingly, antennas manufactured using conventional manufacturing methods can suppress heat generation, but have the problem of reduced charging efficiency.
  • the present invention was proposed to solve the above problems, and its purpose is to provide a method of manufacturing an antenna pattern that precisely forms the line spacing (or line width) of the antenna pattern by forming a through hole in a metal sheet through a double etching process. Do it as
  • the method of manufacturing an antenna pattern includes the steps of laminating a carrier sheet to the first side of a metal sheet, exposing the second side of the metal sheet opposite to the first side, Half-etching the second side of the metal sheet to form a first half groove cut in the inner direction of the metal sheet on the second side of the metal sheet, applying a coverlay sheet to the second side of the metal sheet on which the first half groove is formed. lamination, removing the carrier sheet laminated to the first side of the metal sheet, exposing the first side of the metal sheet from which the carrier sheet has been removed, and half-etching the first side of the metal sheet to form the metal sheet. and forming a second half-groove on the first side toward the inside of the metal sheet.
  • the second half groove may be formed so that at least part of the groove overlaps the first half groove.
  • the first half groove and the second half groove may form a through hole penetrating the first and second sides of the metal sheet.
  • the through hole forms the line spacing of the antenna pattern, and the line spacing of the antenna pattern may be equal to the thickness of the metal sheet.
  • the width of the through hole may be less than or equal to the thickness of the metal sheet.
  • the width of the through hole may be 80% or more and 120% or less of the thickness of the metal sheet.
  • a first half groove having a first central axis vertically penetrating the first and second sides of the metal sheet is formed, and in the step of forming the second half groove, the first half groove of the metal sheet is formed.
  • a second half groove may be formed having a second central axis vertically penetrating the first and second surfaces, and the first central axis and the second central axis may be spaced apart.
  • a first half groove having a first central axis vertically penetrating the first and second sides of the metal sheet is formed, and in the step of forming the second half groove, the first half groove of the metal sheet is formed.
  • a second half groove may be formed having a second central axis vertically penetrating the first and second surfaces, and the first central axis and the second central axis may be disposed on the same line.
  • the metal sheet is a plate-shaped substrate with a set thickness, and the set thickness may be 70 um or more.
  • the method may further include surface treating the first side of the metal sheet on which the second half groove is formed, and in the surface treatment step, a rust prevention film may be formed on the first side of the metal sheet.
  • the method may further include forming an outline of the antenna pattern by stamping the metal sheet on which the second half groove is formed.
  • the antenna pattern manufacturing method divides the etching process into two steps (i.e., the first half-groove forming step and the second half-groove forming step), thereby improving the antenna pattern compared to the antenna pattern formed by the conventional antenna pattern manufacturing method. It has the effect of reducing line spacing and/or line width by about 50%.
  • the antenna pattern manufacturing method reduces the width of the through hole (i.e., the line spacing or line width of the antenna pattern) by about 50% compared to the conventional method, allowing a line spacing (pitch) of 100um or less even in a metal sheet with a thickness of 3oz (105um) or more. There is an effect of being able to produce an antenna pattern with
  • the antenna pattern manufacturing method allows the production of an antenna pattern with a line spacing of about 80% to 120% of the metal thickness, which increases design freedom and enables performance-optimized design.
  • FIG. 1 is a diagram for explaining a method of manufacturing an antenna pattern according to an embodiment of the present invention.
  • Figure 2 is a flowchart illustrating a method of manufacturing an antenna pattern according to an embodiment of the present invention.
  • 3 and 4 are diagrams for explaining each step of the antenna pattern manufacturing method according to an embodiment of the present invention.
  • 5 and 6 are diagrams for explaining through holes formed in a metal sheet through a first half groove forming step and a second half groove forming step.
  • FIG. 7 and 8 are diagrams for comparing and explaining the conventional antenna pattern manufacturing method and the antenna pattern manufacturing method of the present invention.
  • each layer (film), region, pattern or structure is said to be formed “on” or “under” the substrate, each layer (film), region, pad or pattern.
  • “on” and “under” include both being formed “directly” or “indirectly” through another layer.
  • the standards for the top or bottom of each floor are based on the drawing.
  • the antenna pattern manufacturing method manufactures a loop-shaped antenna pattern 100 using a metal sheet 110.
  • the antenna pattern 100 manufactured through the antenna pattern manufacturing method is an antenna pattern for wireless power transmission/reception (WPC; Wireless Power Consortium), an antenna pattern for near field communication (NFC; Near Field Communication), and an antenna pattern for electronic payment (MST; Magnetic Secure). It can be used as an antenna pattern for transmission, etc.
  • WPC Wireless Power Consortium
  • NFC Near Field Communication
  • MST Magnetic Secure
  • the antenna pattern manufacturing method may be used to manufacture a combo antenna pattern including two or more of WPC, NFC, and MST.
  • one or more antenna patterns 100 manufactured by the antenna pattern manufacturing method according to an embodiment of the present invention may be assembled on a circuit board (FPCB) to form a single antenna or a combo antenna.
  • the antenna pattern 100 may be assembled on the circuit board through a soldering process, ultrasonic welding process, etc.
  • the WPC antenna pattern 100 manufactured by the following antenna pattern manufacturing method may be assembled into a circuit board through a soldering process, an ultrasonic welding process, etc., and a combo antenna may be formed by assembling a shielding sheet, a heat dissipation sheet, etc.
  • the antenna pattern manufacturing method includes a carrier sheet lamination step (S110), a first exposure step (S120), a first half groove forming step (S130), and a coverlay sheet. It includes a lamination step (S140), a carrier sheet removal step (S150), a second exposure step (S160), a second half groove forming step (S170), a surface treatment step (S180), and a stamping step (S190).
  • the carrier sheet 120 is laminated to the first side of the metal sheet 110.
  • the carrier sheet 120 is laminated to the first surface (that is, the upper surface of the metal sheet 110) of the metal sheet 110 having a thickness equal to or greater than the set thickness.
  • a metal sheet 110 having a thickness of approximately 2oz (i.e., approximately 70um) or more is prepared.
  • a metal sheet 110 made of copper (Cu) used for the general antenna pattern 100 is prepared.
  • an amorphous solid or semi-solid resin made of polymers such as polyimide (PI), polyethylene terephthalate (PET), or organic compounds and their derivatives is prepared as the carrier sheet 120.
  • the carrier sheet 120 is laminated to the first side of the metal sheet 110 through a roll to roll process.
  • the second surface of the metal sheet 110 is exposed.
  • an exposure film (photoresist film) 130 is laminated on the second side of the metal sheet 110 on which the carrier sheet 120 is laminated.
  • a photoresist may be applied to the second side of the metal sheet 110 on which the carrier sheet 120 is laminated.
  • an antenna pattern mask is laminated (or placed) on the second side of the metal sheet 110 on which the exposure film 130 is laminated, and the metal sheet 110 is exposed through an exposure device. UV light is shined on the second side of . Accordingly, the exposure film 130 laminated on the second surface of the metal sheet 110 is cured into the same shape as the antenna pattern 100 of the antenna pattern mask.
  • the first half groove 112 is formed in the metal sheet 110 by etching the second surface of the metal sheet 110 that has undergone the first exposure step.
  • the second surface of the metal sheet 110 on which the exposure film 130 is laminated is etched.
  • the second surface of the metal sheet 110 on which the exposure film 130 is laminated is etched through an etching process such as wet etching or dry etching. Accordingly, a first half groove 112 is formed in the metal sheet 110 from the second surface of the metal sheet 110 toward the inside of the metal sheet 110.
  • the cured exposure film 130 is removed after the first half groove 112 is formed.
  • coverlay sheet lamination step (S140) the coverlay sheet 140 is laminated to the second side of the metal sheet 110 on which the first half groove 112 is formed.
  • coverlay sheet lamination step (S140) the coverlay sheet 140 is laminated to the second side of the metal sheet 110 on which the first half groove 112 is formed.
  • the coverlay sheet 140 is an example of a sheet formed of a material such as PI, PET, or thermosetting resin.
  • the carrier sheet 120 is removed from the metal sheet 110 on which the coverlay sheet 140 is laminated to the first side.
  • the carrier sheet removal step (S150) the carrier sheet 120 laminated to the second side of the metal sheet 110 is removed.
  • the first side of the metal sheet 110 is exposed.
  • the exposure film 130 is laminated on the first side of the metal sheet 110 on which the carrier sheet 120 is laminated.
  • the photoresist may be applied to the first side of the metal sheet 110 on which the coverlay sheet 140 is laminated.
  • the antenna pattern mask is stacked (or placed) on the first side of the metal sheet 110 on which the exposure film 130 is laminated, and the first surface of the metal sheet 110 is exposed through an exposure device. Shine UV light on the cotton. Accordingly, the exposure film 130 laminated on the first surface of the metal sheet 110 is cured into the same shape as the antenna pattern 100 of the antenna pattern mask.
  • the first side of the metal sheet 110 is etched to form a second half groove 114 in the metal sheet 110.
  • the first side of the metal sheet 110 that has undergone the second exposure step is etched to form a second half groove 114 in the metal sheet 110.
  • the first side of the metal sheet 110 on which the exposure film 130 is laminated is etched.
  • the first side of the metal sheet 110 on which the exposure film 130 is laminated is etched through an etching process such as wet etching or dry etching. Accordingly, a second half groove 114 is formed in the metal sheet 110 from the first surface of the metal sheet 110 toward the inside of the metal sheet 110.
  • the second half groove 114 is formed so that at least part of the first half groove 112 overlaps with the first half groove forming step (S130). Accordingly, the first half groove 112 and the second half groove 114 form a through hole 116 penetrating the metal sheet 110, and the through hole 116 is formed by the metal sheet 110.
  • the line spacing of the antenna pattern 100 is formed.
  • the central axis (A) of the first half groove 112 and the central axis (B) of the second half groove 114 vertically penetrate the first and second surfaces of the metal sheet 110. ) are coincident (i.e., disposed on the same line), and the through hole 116 is formed in an “8” shape that penetrates the metal sheet 110 vertically.
  • the central axis A of the first half groove 112 and the central axes B of the second half grooves 114 are offset from each other in the horizontal direction in the drawing, and the through hole 116 may be formed in an inclined “8” shape that penetrates the metal sheet 110 diagonally.
  • an “8” shaped through hole 116 is formed as a groove is formed at the ends of the two metal sheets 110 adjacent to the hole 116, but the present invention is not limited thereto.
  • a groove may be formed at one end of the two metal sheets 110 adjacent to the through hole 116 to form a “B” shaped through hole 116.
  • the cured exposure film 130 is removed after the second half groove 114 is formed.
  • the conventional antenna pattern manufacturing method forms through holes 16 that form the line spacing of the antenna pattern 100 in the metal sheet 10 through one-time etching.
  • the width W1 of the through hole 16 increases in proportion to the thickness T of the metal sheet 10, and the width W1 of the through hole 16 formed through the conventional etching process is That is, the line spacing of the antenna pattern 100 is formed to be about twice (200%) the thickness (T) of the metal sheet 110.
  • the thickness T of the metal sheet 10 is about 2 oz (approximately 70 um)
  • the width W1 of the through hole 16 formed by the conventional antenna pattern manufacturing method that is, the antenna
  • the line spacing or line width of the pattern 100 is formed to be approximately 140 um.
  • the width W1 of the through hole 16 formed by the conventional antenna pattern manufacturing method is formed to be approximately 210um.
  • the antenna pattern manufacturing method involves an etching process in two steps (i.e., a first half groove forming step (S130) and a second half groove forming step (S170) to form the through hole 116. )), the width of the through hole 116 formed in the metal sheet 110 (i.e., the line spacing or line width of the antenna pattern 100) can be formed to be less than or equal to the thickness of the metal sheet 110.
  • the width of the through hole 116 (i.e., the line spacing or line width of the antenna pattern 100) may be formed to be about 80% to 120% of the thickness of the metal sheet 110, including errors during the manufacturing process.
  • the thickness T of the metal sheet 110 i.e., the antenna pattern 100
  • the width (W2, that is, the line spacing or line width of the antenna pattern 100) of the through hole 116 is formed to be approximately 70 um.
  • the thickness (T) of the metal sheet 110 i.e., the antenna pattern 100
  • the width (W2, i.e., the antenna) of the through hole 116 formed by the conventional antenna pattern manufacturing method is about 100 um.
  • the method of manufacturing an antenna pattern divides the etching process into two steps (i.e., the first half-groove forming step (S130) and the second half-groove forming step (S170)), thereby replacing the conventional antenna.
  • the width of the through hole 116 formed in the metal sheet 110 i.e., the line spacing or line width of the antenna pattern 100
  • the antenna pattern manufacturing method reduces the width of the through hole 116 (i.e., the line spacing or line width of the antenna pattern 100) by about 50% compared to the prior art, thereby reducing the thickness to 3oz (105um). ) or more, there is an effect of producing an antenna pattern 100 with a line spacing (pitch) of 100 um or less.
  • the antenna pattern manufacturing method enables the manufacturing of the antenna pattern 100 with a line spacing of approximately 80% to 120% of the metal thickness, thereby increasing design freedom and enabling performance-optimized design.
  • the first side of the metal sheet 110 is surface treated.
  • an organic material is applied through an Organic Solderability Preservative (OSP) process to form a rust prevention film 118 on the first side of the metal sheet 110.
  • OSP Organic Solderability Preservative
  • a plating layer may be formed by plating tin (Sn) or nickel (Ni) on the first side of the metal sheet 110 in order to prevent oxidation of the metal sheet 110 along with the OSP process.
  • stamping step (S190) an outline of the antenna pattern 100 is formed on the metal sheet 110 through a stamping process.
  • the metal sheet 110 is stamped using the stamping device 200 to form an outline of the antenna pattern 100.
  • the antenna pattern manufacturing method can manufacture the antenna pattern 100 having a line spacing of 80% or more and 120% or less of the thickness of the metal sheet 110.
  • the antenna pattern 100 manufactured through the above-described process is used as an antenna for wireless power transmission/reception (WPC; Wireless Power Consortium), near field communication (NFC; Near Field Communication), electronic payment (MST; Magnetic Secure Transmission), etc. It can work.
  • WPC Wireless Power Consortium
  • NFC Near Field Communication
  • MST Magnetic Secure Transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Details Of Aerials (AREA)

Abstract

La présente invention concerne un procédé de fabrication de motif d'antenne dans lequel : une demi-rainure est formée dans chacune d'une première surface et d'une deuxième surface d'une feuille métallique par le biais d'une gravure primaire ; et la demi-rainure formée sur la première surface et la deuxième surface de la feuille métallique forme un trou traversant à travers la feuille métallique de façon à former un espacement de ligne (ou une largeur de ligne) d'un motif d'antenne qui soit inférieur à l'épaisseur du motif d'antenne, augmentant ainsi le degré de liberté dans une conception de motifs d'antenne et permettant une conception d'optimisation des performances.
PCT/KR2023/004814 2022-04-29 2023-04-10 Procédé de fabrication de motif d'antenne WO2023211008A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2022-0053603 2022-04-29
KR1020220053603A KR102720898B1 (ko) 2022-04-29 안테나 패턴 제조 방법

Publications (1)

Publication Number Publication Date
WO2023211008A1 true WO2023211008A1 (fr) 2023-11-02

Family

ID=88519295

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2023/004814 WO2023211008A1 (fr) 2022-04-29 2023-04-10 Procédé de fabrication de motif d'antenne

Country Status (1)

Country Link
WO (1) WO2023211008A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070113770A (ko) * 2006-05-26 2007-11-29 (주)창성 양면 회로 형성 알에프아이디 태그용 자성 시트 적용안테나 구조 및 그 제조방법
KR20090043077A (ko) * 2007-10-29 2009-05-06 강승오 알에프아이디 안테나 및 그 제조방법
KR20100072790A (ko) * 2008-12-22 2010-07-01 송민규 휴대폰용 루프 안테나 제조 방법
WO2011059151A1 (fr) * 2009-11-13 2011-05-19 충주대학교 산학협력단 Antenne a boucle transparente pour etiquette rfid et son procede de fabrication
KR101263321B1 (ko) * 2012-09-19 2013-05-15 에이큐 주식회사 엔에프시용 단면 루프안테나 제조방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070113770A (ko) * 2006-05-26 2007-11-29 (주)창성 양면 회로 형성 알에프아이디 태그용 자성 시트 적용안테나 구조 및 그 제조방법
KR20090043077A (ko) * 2007-10-29 2009-05-06 강승오 알에프아이디 안테나 및 그 제조방법
KR20100072790A (ko) * 2008-12-22 2010-07-01 송민규 휴대폰용 루프 안테나 제조 방법
WO2011059151A1 (fr) * 2009-11-13 2011-05-19 충주대학교 산학협력단 Antenne a boucle transparente pour etiquette rfid et son procede de fabrication
KR101263321B1 (ko) * 2012-09-19 2013-05-15 에이큐 주식회사 엔에프시용 단면 루프안테나 제조방법

Also Published As

Publication number Publication date
KR20230153772A (ko) 2023-11-07

Similar Documents

Publication Publication Date Title
WO2012091373A2 (fr) Procédé de fabrication de carte de circuit imprimé
WO2020204578A1 (fr) Élément rayonnant d'antenne et antenne
WO2012169866A2 (fr) Carte de circuit imprimé et procédé pour sa fabrication
WO2022103159A1 (fr) Module d'antenne et terminal de communication sans fil le comprenant
WO2018048165A1 (fr) Ensemble d'électrodes empilées et batterie rechargeable souple comprenant ledit ensemble
AU2019255870B2 (en) Antenna module including dielectric material and electronic device including antenna module
WO2014088357A1 (fr) Carte de circuit imprimé et procédé de fabrication de cette dernière
WO2018110897A2 (fr) Carte à circuits imprimés à couches multiples et dispositif électronique l'intégrant
EP2915415A1 (fr) Carte de circuit imprimé
WO2023211008A1 (fr) Procédé de fabrication de motif d'antenne
WO2024005451A1 (fr) Procédé de fabrication de motif d'antenne
WO2024005449A1 (fr) Procédé de fabrication de motif d'antenne et motif d'antenne ainsi fabriqué
US20210002779A1 (en) Collector plate
WO2023210994A1 (fr) Motif d'antenne
CN107529293A (zh) 一种移动终端、多层pcb电路板及其制造方法
WO2023085580A1 (fr) Procédé de préparation de carte de circuit imprimé souple
KR102720898B1 (ko) 안테나 패턴 제조 방법
WO2022250418A1 (fr) Module d'antenne et dispositif électronique le comprenant
WO2018182327A1 (fr) Prise de vérification de boîtier pour semi-conducteur et procédé de fabrication associé
WO2022108226A1 (fr) Module d'antenne utilisant un motif de section transversale
WO2021158041A1 (fr) Module de câble et son procédé de fabrication
WO2024005450A1 (fr) Diagramme d'antenne et son procédé de fabrication
WO2019132509A1 (fr) Module d'antenne et terminal portable le comprenant
WO2019177357A1 (fr) Module de réception d'énergie sans fil et dispositif électronique portable le comprenant
WO2019164118A1 (fr) Carte de circuit imprimé

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23796657

Country of ref document: EP

Kind code of ref document: A1