WO2021092713A1 - Matériau composite de blindage électromagnétique et son procédé de préparation - Google Patents

Matériau composite de blindage électromagnétique et son procédé de préparation Download PDF

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Publication number
WO2021092713A1
WO2021092713A1 PCT/CN2019/116956 CN2019116956W WO2021092713A1 WO 2021092713 A1 WO2021092713 A1 WO 2021092713A1 CN 2019116956 W CN2019116956 W CN 2019116956W WO 2021092713 A1 WO2021092713 A1 WO 2021092713A1
Authority
WO
WIPO (PCT)
Prior art keywords
copper foil
foil layer
electromagnetic shielding
composite material
layer
Prior art date
Application number
PCT/CN2019/116956
Other languages
English (en)
Chinese (zh)
Inventor
陈红辉
Original Assignee
常德鑫睿新材料有限公司
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 常德鑫睿新材料有限公司 filed Critical 常德鑫睿新材料有限公司
Priority to PCT/CN2019/116956 priority Critical patent/WO2021092713A1/fr
Publication of WO2021092713A1 publication Critical patent/WO2021092713A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • 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
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields

Definitions

  • the invention relates to the technical field of electromagnetic shielding, in particular to a composite material for electromagnetic shielding and a preparation method thereof.
  • Electromagnetic shielding is the main technology to suppress electromagnetic interference.
  • the competition in the shielding material market is becoming increasingly fierce.
  • shielding composite materials have received increasing attention from researchers.
  • Many countries have invested a lot of manpower and material resources to conduct in-depth research on electromagnetic shielding materials.
  • the technical problem to be solved by the present invention is to provide a composite material for electromagnetic shielding, which has better shielding effectiveness at low frequencies and expands the application range of electromagnetic shielding materials.
  • a composite material for electromagnetic shielding comprising a first copper foil layer and a second copper foil layer arranged at intervals, and an amorphous alloy layer formed between the first copper foil layer and the second copper foil layer, wherein
  • the thickness of the first copper foil layer and the second copper foil layer is 3-6 ⁇ m
  • the amorphous alloy layer is made of Fe 40 Ni 38 Mo 4 B 18 amorphous ribbon doped with ferromagnetic powder material, and its thickness is 30-100 ⁇ m.
  • the thickness of the first copper foil layer and the second copper foil layer are 5-6 ⁇ m, respectively.
  • the thickness of the amorphous alloy layer is 80-100 ⁇ m.
  • the surfaces of the first copper foil layer and the second copper foil layer are respectively wrapped with a silver foil layer, and the thickness of the silver foil layer is 0.1-0.5 ⁇ m.
  • the invention also provides a method for preparing the composite material for electromagnetic shielding.
  • a preparation method of a composite material for electromagnetic shielding includes the following steps:
  • Step S1 providing a first copper foil layer and a second copper foil layer
  • Step S2 fixing the first copper foil layer and the second copper foil layer as required, so that the distance between the two meets the design requirements of the thickness of the amorphous alloy layer;
  • Step S3 using a plasma spraying process to spray an amorphous alloy material between the first copper foil layer and the second copper foil layer to form an amorphous alloy layer.
  • the electromagnetic shielding composite material of the present invention adopts a sandwich sandwich design.
  • the center layer is made of Fe 40 Ni 38 Mo 4 B 18 amorphous strips doped with ferromagnetic powder materials, and the outer two layers are made of copper foil, which has strong conductivity, Good flame retardancy, good shielding effect, etc.
  • a composite material for electromagnetic shielding comprising a first copper foil layer and a second copper foil layer arranged at intervals, and an amorphous alloy layer formed between the first copper foil layer and the second copper foil layer, wherein
  • the thickness of the first copper foil layer and the second copper foil layer is 3-6 ⁇ m
  • the amorphous alloy layer is made of Fe 40 Ni 38 Mo 4 B 18 amorphous ribbon doped with ferromagnetic powder material, and its thickness is 30-100 ⁇ m.
  • the thickness of the first copper foil layer and the second copper foil layer are 5-6 ⁇ m, respectively.
  • the thickness of the amorphous alloy layer is 80-100 ⁇ m.
  • the surfaces of the first copper foil layer and the second copper foil layer are respectively wrapped with a silver foil layer, and the thickness of the silver foil layer is 0.1-0.5 ⁇ m.
  • the invention also provides a method for preparing the composite material for electromagnetic shielding.
  • a preparation method of a composite material for electromagnetic shielding includes the following steps:
  • Step S1 providing a first copper foil layer and a second copper foil layer
  • Step S2 fixing the first copper foil layer and the second copper foil layer as required, so that the distance between the two meets the design requirements of the thickness of the amorphous alloy layer;
  • Step S3 using a plasma spraying process to spray an amorphous alloy material between the first copper foil layer and the second copper foil layer to form an amorphous alloy layer.
  • the electromagnetic shielding composite material of the present invention adopts a sandwich sandwich design.
  • the center layer is made of Fe 40 Ni 38 Mo 4 B 18 amorphous strips doped with ferromagnetic powder materials, and the outer two layers are made of copper foil, which has strong conductivity, Good flame retardancy, good shielding effect, etc., especially when the surface of the copper foil layer is covered with a silver foil layer, the shielding effect is better.
  • its shielding effectiveness reaches 80dB, which expands the application range of electromagnetic shielding materials.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

L'invention concerne un matériau composite de blindage électromagnétique et un procédé de préparation associé. Ledit matériau composite de blindage électromagnétique comprend une première couche de feuille de cuivre et une seconde couche de feuille de cuivre disposées à un intervalle, et une couche d'alliage amorphe formée entre la première couche de feuille de cuivre et la seconde couche de feuille de cuivre, l'épaisseur de la première couche de feuille de cuivre et de la seconde couche de feuille de cuivre étant comprise entre 3 et 6 µm, et la couche d'alliage amorphe est préparée à l'aide d'un matériau en bande non cristallin de Fe40Ni38Mo4B18 dopé avec un matériau de poudre de fer magnétique et a une épaisseur comprise entre 30 et 100 µm. Ledit matériau composite de blindage électromagnétique présente des performances de blindage relativement bonnes à basses fréquences et augmente la portée d'application des matériaux de blindage électromagnétique.
PCT/CN2019/116956 2019-11-11 2019-11-11 Matériau composite de blindage électromagnétique et son procédé de préparation WO2021092713A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/116956 WO2021092713A1 (fr) 2019-11-11 2019-11-11 Matériau composite de blindage électromagnétique et son procédé de préparation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/116956 WO2021092713A1 (fr) 2019-11-11 2019-11-11 Matériau composite de blindage électromagnétique et son procédé de préparation

Publications (1)

Publication Number Publication Date
WO2021092713A1 true WO2021092713A1 (fr) 2021-05-20

Family

ID=75911558

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/116956 WO2021092713A1 (fr) 2019-11-11 2019-11-11 Matériau composite de blindage électromagnétique et son procédé de préparation

Country Status (1)

Country Link
WO (1) WO2021092713A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101252823A (zh) * 2008-03-06 2008-08-27 西安交通大学 一种制备pcb电路用抗电磁干扰屏蔽器件的方法
CN103171184A (zh) * 2011-12-20 2013-06-26 北京有色金属研究总院 一种低频强磁场屏蔽材料
CN106937522A (zh) * 2017-04-05 2017-07-07 合肥美凯电子有限公司 一种新型电磁屏蔽膜
WO2018081394A1 (fr) * 2016-10-31 2018-05-03 3M Innovative Properties Company Composites à perte diélectrique élevée pour des applications d'interférence électromagnétique (emi)

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101252823A (zh) * 2008-03-06 2008-08-27 西安交通大学 一种制备pcb电路用抗电磁干扰屏蔽器件的方法
CN103171184A (zh) * 2011-12-20 2013-06-26 北京有色金属研究总院 一种低频强磁场屏蔽材料
WO2018081394A1 (fr) * 2016-10-31 2018-05-03 3M Innovative Properties Company Composites à perte diélectrique élevée pour des applications d'interférence électromagnétique (emi)
CN106937522A (zh) * 2017-04-05 2017-07-07 合肥美凯电子有限公司 一种新型电磁屏蔽膜

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