CN109168315B - Broadband light-transmitting shielding material composite structure, composite glass and OCA back glue structure - Google Patents

Broadband light-transmitting shielding material composite structure, composite glass and OCA back glue structure Download PDF

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Publication number
CN109168315B
CN109168315B CN201811233144.6A CN201811233144A CN109168315B CN 109168315 B CN109168315 B CN 109168315B CN 201811233144 A CN201811233144 A CN 201811233144A CN 109168315 B CN109168315 B CN 109168315B
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layer
substrate layer
composite structure
oca
shielding material
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CN109168315A (en
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黎亚萍
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Qinhuangdao Bodun Electronics Co ltd
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Qinhuangdao Bodun Electronics Co ltd
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    • 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
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/0086—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a single discontinuous metallic layer on an electrically insulating supporting structure, e.g. metal grid, perforated metal foil, film, aggregated flakes, sintering
    • 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
    • B32B15/02—Layer formed of wires, e.g. mesh
    • 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
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/103—Metal fibres
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/212—Electromagnetic interference shielding

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

Broadband light-transmitting shielding material composite structure, composite glass and OCA gum structure. The problem that high electromagnetic shielding protection efficiency can not be realized in a very good broadband at present is mainly solved. The method is characterized in that: the novel solar cell comprises a first substrate layer, a second substrate layer and a third substrate layer, wherein a metal shielding grid layer is arranged between the first substrate layer and the second substrate layer, and a transparent conductive layer is arranged between the second substrate layer and the third substrate layer. The invention provides a broadband light-transmitting shielding material composite structure, composite glass and an OCA back adhesive structure, fully utilizes the complementary effect of the low-resistance characteristic of a metal shielding grid and the high-resistance characteristic of an ITO material, and combines a PET matrix material into a multilayer integrated structure, so that on the basis of ensuring light transmittance and eliminating moire fringes, a good electromagnetic shielding protection effect is achieved in a broadband, the design and production level of a high-quality transparent shielding material are promoted and improved, and the invention can be widely applied to electromagnetic protection design and reinforcement transformation of various optical windows.

Description

Broadband light-transmitting shielding material composite structure, composite glass and OCA back glue structure
Technical Field
The invention relates to the field of electromagnetic shielding material design and preparation, in particular to a broadband light-transmitting shielding material composite structure.
Background
Among the electromagnetic shielding materials, the materials are selected according to different purposes. Electromagnetic shielding materials with good electrical conductivity and magnetic permeability may be selected, as required for conventional shielding. But the transparent shielding material is needed to be selected according to the special shielding requirements of various optical windows, such as personnel lighting windows, displays, optical sensors and the like. Metals have been the preferred choice for shielding materials as good conductors, but due to the opaque nature of metals, the light transmission requirements cannot be met. Screen structures have been commonly used as light-transmitting shielding materials in the early days. In recent years, with the continuous increase of requirements for light transmittance index, material dimension specification and the like, many companies and research institutions at home and abroad develop researches on novel transparent conductive shielding materials. The existing mainstream transparent shielding materials or structures mainly comprise three types of silk screens, film layers and grids. The shielding silk screen material is the most traditional transparent shielding material, but is low in light transmittance and poor in visual effect, and is commonly used for low-end products and occasions with low requirements on light transmittance; although the transparent conductive film layer material has good light transmission performance, the electromagnetic shielding performance is not high as compared with the metal difference by one to two orders of magnitude; the metal mesh material is a novel transparent shielding material which appears along with the development of a precision machining process, is most widely applied to high-end transparent electromagnetic shielding products, but has poor shielding efficiency in a high frequency band due to the fact that the shielding efficiency of the metal mesh material is reduced along with the increase of frequency due to the mesh structure characteristics of the metal mesh material. The above single materials have inherent disadvantages, and it is difficult to achieve high electromagnetic shielding effectiveness in a wide frequency band.
Disclosure of Invention
In order to overcome the defects of the background technology, the invention provides a broadband light-transmitting shielding material composite structure, which mainly solves the problem that higher electromagnetic shielding protection efficiency can not be realized in a broadband very good at present.
The technical scheme adopted by the invention is as follows:
the broadband light-transmitting shielding material composite structure comprises a first substrate layer, a second substrate layer and a third substrate layer, wherein a metal shielding grid layer is arranged between the first substrate layer and the second substrate layer, and a transparent conductive layer is arranged between the second substrate layer and the third substrate layer.
The first substrate layer, the second substrate layer and the third substrate layer are ethylene terephthalate film layers.
The metal shielding grid layer adopts a non-directional random grid with a line width smaller than 10 mu m and a mesh number larger than 180.
The transparent conductive layer is an indium tin oxide transparent conductive layer.
The ITO transparent conductive layer is made of ITO material with surface resistance smaller than 5 ohms, and the light transmittance is larger than 80%.
The composite glass comprises glass substrate layers arranged up and down, wherein a composite structure is arranged between the upper glass substrate layer and the lower glass substrate layer, and the composite structure is the broadband light-transmitting shielding material composite structure.
The utility model provides a OCA gum structure, includes first protection film layer, second protection film layer, OCA gum layer, the second protection film layer is located OCA gum layer bottom, first protection film layer with be equipped with composite structure between the OCA gum layer, composite structure is foretell broadband printing opacity shielding material composite structure.
The beneficial effects of the invention are as follows: the invention provides a broadband light-transmitting shielding material composite structure, composite glass and an OCA back adhesive structure, fully utilizes the complementary effect of the low-resistance characteristic of a metal shielding grid and the high-resistance characteristic of an ITO material, and combines a PET matrix material into a multilayer integrated structure, so that on the basis of ensuring light transmittance and eliminating moire fringes, a good electromagnetic shielding protection effect is achieved in a broadband, the design and production level of a high-quality transparent shielding material are promoted and improved, and the invention can be widely applied to electromagnetic protection design and reinforcement transformation of various optical windows.
Drawings
FIG. 1 is a schematic cross-sectional view of one embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view of a composite glass of the present invention.
Fig. 3 is a schematic cross-sectional view of an OCA adhesive-backed structure of the present invention.
Fig. 4 is a schematic diagram of a metal random grid structure according to an embodiment of the present invention.
Fig. 5 is a graph showing the shielding effectiveness results of a metal random mesh in the range of 10 kHz-26.5 GHz.
FIG. 6 is a graph showing the result of shielding effectiveness of an ITO conductive film layer in the range of 10 kHz-26.5 GHz.
Fig. 7 is a graph comparing the results of the composite structure and single material shielding effectiveness calculations.
Detailed Description
The invention is further described below with reference to the accompanying drawings: the broadband light-transmitting shielding material composite structure comprises a first substrate layer 1, a second substrate layer 2 and a third substrate layer 3, wherein a metal shielding grid layer 4 is arranged between the first substrate layer and the second substrate layer, and a transparent conductive layer 5 is arranged between the second substrate layer and the third substrate layer.
The first substrate layer 1, the second substrate layer 2 and the third substrate layer 3 are ethylene terephthalate film layers. The light transmittance of the polyethylene terephthalate (PET) material can reach 90 percent; the alloy has excellent physical and mechanical properties in a wider temperature range and high tensile strength; the electrical insulation property is excellent at high temperature and high frequency, and the creep resistance, fatigue resistance, friction resistance and dimensional stability are good.
The metal shielding grid layer adopts a non-directional random grid with a line width smaller than 10 mu m and a mesh number larger than 180. The aperiodic arrangement of the random grid can eliminate moire interference fringes, and has excellent light transmission performance and low-frequency electromagnetic shielding effect. As a preferable scheme, the metal shielding grid layer in the broadband light-transmitting shielding material composite structure adopts a non-directional random grid with the line width of 8 mu m, the thickness of 2 mu m and the specification of 200 meshes.
The transparent conductive layer is an indium tin oxide, ITO, transparent conductive layer.
The ITO transparent conductive layer is made of ITO material with surface resistance smaller than 5 ohms, and the light transmittance is larger than 80%. The conductivity of the material can be calculated according to the following surface resistance formula.
The electromagnetic shielding effectiveness of the broadband light-transmitting shielding material composite structure can be calculated by adopting a quasi-periodic structure electromagnetic field numerical simulation method, and the comparison result with the metal grid and the ITO material is shown in fig. 7. It can be seen that the electromagnetic shielding effectiveness of the broadband light-transmitting shielding material composite structure exceeds 67dB in the range of 10 kHz-26.5 GHz.
The ITO transparent conductive layer in the broadband light-transmitting shielding material composite structure is made of ITO material with 3 ohm surface resistance and 600nm thickness, and the conductivity is 5 multiplied by 106S/m according to the formula (1). The electromagnetic shielding effectiveness of the single type of material can be calculated using the following formula, and the results are shown in fig. 6.
The composite glass comprises glass substrate layers 6 arranged up and down, wherein a composite structure is arranged between the upper glass substrate layer and the lower glass substrate layer, and the composite structure is the broadband light-transmitting shielding material composite structure.
An OCA back adhesive structure comprises a first protective film layer 71 and a second protective film layer 72,
OCA gum layer 73, second protection film layer 72 is located OCA gum layer 73 bottom, first protection film layer 71 with be equipped with composite construction between the OCA gum layer, composite construction is foretell broadband printing opacity shielding material composite construction.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The embodiments described with reference to the drawings are exemplary and intended to be illustrative of the invention and should not be construed as limiting the invention. The examples should not be construed as limiting the invention, but any modifications based on the spirit of the invention should be within the scope of the invention.

Claims (4)

1. Broadband light-transmitting shielding material composite structure, its characterized in that: the novel transparent conductive film comprises a first substrate layer (1), a second substrate layer (2) and a third substrate layer (3), wherein a metal shielding grid layer (4) is arranged between the first substrate layer and the second substrate layer, a transparent conductive layer (5) is arranged between the second substrate layer and the third substrate layer, the metal shielding grid layer is formed by randomly selecting a non-directional grid with a line width smaller than 10 mu m and a mesh number larger than 180, the first substrate layer (1), the second substrate layer (2) and the third substrate layer (3) are ethylene glycol terephthalate film layers, and the transparent conductive layer is an indium tin oxide transparent conductive layer.
2. The broadband light-transmitting and shielding material composite structure according to claim 1, wherein: the transparent conductive layer is made of ITO material with the surface resistance smaller than 5 ohms, and the light transmittance is larger than 80%.
3. A composite glass, characterized in that: comprising glass substrate layers (6) arranged on the upper side and the lower side, wherein a composite structure is arranged between the upper side and the lower side of the glass substrate layers, and the composite structure is a broadband light-transmitting shielding material composite structure according to any one of claims 1-2.
4. OCA gum structure, its characterized in that: the novel broadband light-transmitting shielding material comprises a first protective film layer (71), a second protective film layer (72) and an OCA back adhesive layer (73), wherein the second protective film layer (72) is arranged at the bottom of the OCA back adhesive layer (73), a composite structure is arranged between the first protective film layer (71) and the OCA back adhesive layer, and the composite structure is the broadband light-transmitting shielding material composite structure according to any one of claims 1-2.
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CN109996431B (en) * 2019-05-05 2023-11-10 江苏铁锚玻璃股份有限公司 High-performance shielding glass and preparation method thereof
CN112867379B (en) * 2021-01-08 2022-07-12 中国科学院宁波材料技术与工程研究所 Transparent ultra-wideband electromagnetic shielding device
CN113795132B (en) * 2021-08-13 2024-04-05 深圳市志凌伟业光电有限公司 Electromagnetic shielding member and display

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CN107589783A (en) * 2017-08-14 2018-01-16 苏州维业达触控科技有限公司 A kind of electromagnetic shielding panel and the screening arrangement comprising the electromagnetic shielding panel
CN209462878U (en) * 2018-10-23 2019-10-01 秦皇岛波盾电子有限公司 Broadband light transmission shields Material cladding structure and compound glass and OCA gum structure

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JP2008210898A (en) * 2007-02-23 2008-09-11 Mitsui Chemicals Inc Electromagnetic wave shielding film and window glass using the same
JP2009295980A (en) * 2008-06-02 2009-12-17 Dongjin Semichem Co Ltd Electromagnetic wave shielding filter and its manufacturing method, and display device
JP2011054833A (en) * 2009-09-03 2011-03-17 Gunze Ltd Electromagnetic wave-shielding material, and method of manufacturing the same
JP2012164885A (en) * 2011-02-08 2012-08-30 Gunze Ltd Electromagnetic wave shield material, manufacturing method thereof, and plasma display panel equipped therewith
JP2012164884A (en) * 2011-02-08 2012-08-30 Gunze Ltd Electromagnetic wave shield material and plasma display panel equipped therewith
CN202193728U (en) * 2011-08-12 2012-04-18 蚌埠玻璃工业设计研究院 Novel electromagnetic shielding coated glass
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CN107144898A (en) * 2017-06-29 2017-09-08 中国建筑材料科学研究总院 Optics regulation and control electromagnetic shielding glass and preparation method thereof
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CN209462878U (en) * 2018-10-23 2019-10-01 秦皇岛波盾电子有限公司 Broadband light transmission shields Material cladding structure and compound glass and OCA gum structure

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