KR20080023888A - Antireflective glass for an automobile - Google Patents

Antireflective glass for an automobile Download PDF

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Publication number
KR20080023888A
KR20080023888A KR1020060088000A KR20060088000A KR20080023888A KR 20080023888 A KR20080023888 A KR 20080023888A KR 1020060088000 A KR1020060088000 A KR 1020060088000A KR 20060088000 A KR20060088000 A KR 20060088000A KR 20080023888 A KR20080023888 A KR 20080023888A
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South Korea
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coating
refractive index
glass
glass substrate
reflective
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KR1020060088000A
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Korean (ko)
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이창길
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코리아 오토글라스 주식회사
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Priority to KR1020060088000A priority Critical patent/KR20080023888A/en
Publication of KR20080023888A publication Critical patent/KR20080023888A/en

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
    • C03C17/23—Oxides
    • C03C17/245—Oxides by deposition from the vapour phase
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/70—Properties of coatings
    • C03C2217/73—Anti-reflective coatings with specific characteristics
    • C03C2217/734—Anti-reflective coatings with specific characteristics comprising an alternation of high and low refractive indexes

Abstract

An anti-reflective functional coating glass is provided to show low reflective effects applicable to a safe glass for an automobile by controlling a material kind, a reflective index and a thickness of coating layers on a glass substrate. An anti-reflective functional coating glass has a structure in which at least two coating films having a reflective index different from each other are layered on a glass substrate. In particular, the anti-reflective functional coating glass satisfies the formula: n4 < n3 < n2 < n1, wherein n1 represents a reflective index of the glass substrate(1), n2 represents a reflective index of a first coating film(3) on the glass substrate, n3 represents a reflective index of a second coating film(4) on the glass substrate(1) and n4 represents a reflective index of air. Thereafter, the anti-reflective functional coating glass is able to be formed into a bended shape. Further, a index of refraction of the coating films is 1.53 to 2.73, and a thickness of the coating films is 5 nm or less.

Description

반사방지 기능성 코팅유리 {antireflective glass for an automobile}Anti-reflective functional coated glass {antireflective glass for an automobile}

도 1은 본 발명의 접합 된 상태에서의 단면도1 is a cross-sectional view in the bonded state of the present invention

도 2는 본 발명이 자동차 앞유리로 장착된 개념도2 is a conceptual diagram of the present invention mounted on the windshield of the vehicle

도 3은 본 발명이 자동차 앞유리로 장착시, 코팅층 A(SiO2), B(Si) 일 경우 각 층 두께에 따른 가시광선 투과율 그래프FIG. 3 is a graph showing visible light transmittance according to each layer thickness when the present invention is mounted on a vehicle windshield, and is a coating layer A (SiO 2) or B (Si). FIG.

도 4는 본 발명이 자동차 앞유리로 장착시, 코팅층 A(SiO2), B(Si) 일 경우 각 층 두께에 따른 가시광선 반사율 그래프4 is a graph showing the visible light reflectance according to each layer thickness when the present invention is mounted on the windshield of the vehicle, and the coating layer A (SiO 2), B (Si)

※ 도면의 주요부분에 대한 부호 설명※ Explanation of Signs of Major Parts of Drawings

1. 유리기판1. Glass substrate

2. 플라스틱 재질의 중간막(PVB)2. Plastic Interlayer (PVB)

3. 첫 번째 코팅층 (고굴절률 층)3. First coating layer (high refractive index layer)

4. 두 번째 코팅층 (저굴절률 층)4. Second coating layer (low refractive index layer)

5. 입사각5. Incidence angle

A: 두 번째 층의 두께 (nm)A: thickness of the second layer (nm)

B: 첫 번째 층의 두께 (nm)B: thickness of the first layer (nm)

본 발명은 투명한 유리 기판상에 굴절률이 다른 물질을 적어도 2개층 이상 적층하여 저반사 성능을 유리기판에 부여하기 위한 것이다. 특히, 자동차용 안전유리에 관한 것으로 법규사항인 최하 가시광선 투과율(안전유리 70%이상, 앞유리의 경우 75%이상)을 충족함과 동시에 입사각이 고각인 광에 대해서도 저반사 성능을 모두 갖는 반사방지 기능성 코팅유리에 관한 것이다. 기존의 굴절률이 다른 물질로 이루어진 다층 저반사 코팅유리는 평판유리에서는 저반사 효과가 있었지만 곡이 있는 유리와 입사각이 고각인 광에 대해서는 그 효과가 미비하였다. 반사방지 코팅이 된 유리가 자동차용 안전유리 특히 자동차 앞유리로 사용되기 위해서는 코팅 과정이 완료된 후 유리 표면이 곡이 있는 모습으로 성형이 가능하여야 하며 자동차에 정착시 자동차 구조적 특징으로 인해 일정한 장착 각도를 갖기에 입사각이 고각인 가시광선에 대해 저반사 효과가 필수적이었다. 또한 법규사항인 최하 가시광선 투과율(안전유리 70%이상, 앞유리의 경우 75%이상)을 충족하여야 하기에 코팅층의 두께 조절이 매우 중요하다.The present invention provides a low reflection performance to a glass substrate by laminating at least two layers of materials having different refractive indices on a transparent glass substrate. In particular, it is related to safety glass for automobiles, and meets the minimum visible light transmittance (70% or more of safety glass, 75% or more for windshield), which is a legal requirement, and reflects both low reflection performance even for light having high angle of incidence. It relates to an anti-functional coating glass. The conventional multi-layer low reflection coating glass made of materials with different refractive indices had a low reflection effect in flat glass, but the effect was insignificant for curved glass and light having high angle of incidence. In order to be used as the safety glass for automobiles, especially the windshield, the glass with anti-reflective coating should be able to be molded into curved shape after the coating process is completed. The low reflection effect was essential for visible light having a high incident angle. In addition, the thickness control of the coating layer is very important because the minimum visible light transmittance (70% or more of safety glass, 75% or more in the case of windshield) is satisfied.

본 발명에서 고굴절률 물질로 사용되는 Si(실리콘)은 1.0㎛이하의 파장의 빛은 흡수하는 성질이 강해 가시광선 영역을 고려 한다면(약 0.4 ~ 0.75㎛) 반사방지유리코팅 재료로의 사용이 가능하지만, 반사방지 코팅 유리가 자동차용 안전유리로 사용되기 위해서는 법규사항인 최하 가시광선 투과율(안전유리 70%이상 앞유리의 경우 75%이상)을 충족하여야 하기에 사용의 어려움이 있었다. 이를 해결하기 위해 Si(실리콘)을 아주 얇게 코팅하는 방법이 제안되었고 그 두께가 5nm 이하일 때 만족하는 결과를 얻었다. 또한 저굴절률 물질로 함께 사용되는 SiO2는 상대적으로 두껍게 코팅이 되는데 이는 저굴절률 코팅 물질로 사용될 뿐만 아니라 차후 있을 열처리(성형, 강화 등)과정에서 유리의 조성 성분 중 하나인 알칼리 금속 이온이 유리표면 밖으로 분출되어 코팅 면의 면품질을 저하시키는 현상을 막는 차단막 역할도 수행할 수 있다. In the present invention, Si (silicon) used as a high refractive index material has a strong property of absorbing light having a wavelength of 1.0 μm or less, so that it can be used as an antireflective glass coating material considering the visible light region (about 0.4 to 0.75 μm). However, in order to use the anti-reflective coating glass as a safety glass for automobiles, there was a difficulty in using the lowest visible light transmittance (a safety glass of 70% or more and 75% of a windshield or more). In order to solve this problem, a very thin coating method of Si (silicon) has been proposed and obtained satisfactory results when the thickness is 5 nm or less. In addition, SiO2, which is used together as a low refractive index material, is coated with a relatively thick coating, which is not only used as a low refractive index coating material but also an alkali metal ion, which is one of the composition components of the glass, is removed from the surface of the glass during the subsequent heat treatment (molding and tempering) It may also serve as a barrier film that prevents the phenomenon of being ejected to lower the surface quality of the coating surface.

투명한 유리 기판 위에 적어도 2개 이상의 굴절률이 다른 물질로 이루어진 코팅층들이 가시광선 영역의 빛을 흡수 또는 광학적으로 간섭하여 반사되는 빛의 양을 감소시켜 저반사 효과를 나타내는 반사방지 코팅유리에 관한 것으로 각각의 코팅층은 유리의 굴절률 (약 1.53)을 기준으로 고굴절률, 저굴절률로 정의했다. 본 발명의 기본원리는 코팅층을 이루는 코팅막에서의 가시광선 영역의 빛의 흡수와 코팅막 표면에서의 반사된 빛들의 광학적 간섭으로 인한 상호간 상쇄이다. 이러한 요소들을 제어하기 위한 인자들로는 코팅층을 아루는 물질, 굴절률, 유리기판 상에 형성된 코팅 막의 두께가 있다. 코팅 막을 형성하는 물질의 굴절률의 값을 n, 코팅막의 두께를 d라 각각 정의하면 이 두 값의 곱 nd를 광학적 두께(optical thickness)라 한다. 기본적으로 코팅 막의 광학적 두께가 제어하고자 하는 빛의 파장의 1/4이 되면 반사방지 성능을 갖는다. 반사방지 코팅유리가 자동차 안전유리에 적용되기 위해서는 코팅이 이루어진 뒤 열처리(성형,강화 등)가 가능하여야 하며 최하 가시광선 투과율이 70%가 넘어야 한다. 특히, 자동차 앞유리로 사용이 될 경우에는 최하 가시광선 투과율이 75%가 넘어야 하며 입사각이 고각(약 60°)인 광에 대해서도 반사방지 성능이 있어야 한다. Si(실리콘)의 경우 가시광선 영역의 빛을 흡수하는 성질이 강해 가시광선 투과율을 요구하는 반사방지 제품에는 사용이 제한적 이었지만 본 발명에서는 그 두께를 아주 얇게 코팅하는 방법을 사용함으로써 기존의 문제점을 해결하였다.The present invention relates to an antireflective coating glass in which coating layers made of at least two different refractive indices on a transparent glass substrate reduce the amount of reflected light by absorbing or optically interfering light in the visible region, and exhibiting a low reflection effect. The coating layer was defined as high refractive index and low refractive index based on the refractive index (about 1.53) of the glass. The basic principle of the present invention is mutual cancellation due to the absorption of light in the visible region and the optical interference of the reflected light on the surface of the coating film. Factors for controlling these factors include the material covering the coating layer, the refractive index, and the thickness of the coating film formed on the glass substrate. When the value of the refractive index of the material forming the coating film is defined as n and the thickness of the coating film is defined as d, respectively, the product nd of these two values is called optical thickness. Basically, when the optical thickness of the coating film is 1/4 of the wavelength of light to be controlled, it has antireflection performance. In order to apply anti-reflective coating glass to automobile safety glass, it must be heat-treated (molding, strengthening, etc.) after coating is applied, and the lowest visible light transmittance must be over 70%. In particular, when used as a windshield, the lowest visible light transmittance should exceed 75% and antireflection performance should be provided even for light having a high angle of incidence (about 60 °). In the case of Si (silicon), the absorption of light in the visible region is strong, so the use of the anti-reflective products requiring visible light transmittance is limited, but the present invention solves the existing problem by using a very thin coating method. It was.

평판상에 굴절률이 다른 물질을 다층 코팅하여 반사방지 성능을 보여왔던 기존 방법으로는 반사방지 성능을 갖는 자동차 안전유리 제적에 한계가 있었다 .이는 자동차용 안전유리의 곡이 있는 외형과 가시광선 투과율 등의 법적인 문제와 자동차 장착각도에 따른 고입사각 등의 변수가 있기 때문이다. 본 발명은 상기 문제점을 해결하였으며 본 발명이 자동차 안전유리로 사용이 될 경우 자동차 대쉬보드 위의 물체들이 차량 앞유리로 반사되는 것을 차감시켜 운전자들에게 눈부심 방지 및 향상된 시야를 제공할 수 있으며 특히, 고령 운전자들에게 적합하다.Existing methods that have exhibited anti-reflective performance by coating multi-layered materials with different refractive indices on the flat plate had limitations on the removal of automotive safety glass with anti-reflective performance, such as curved shape and visible light transmittance of automobile safety glass. This is because there are variables such as legal problems and high angle of incidence depending on the angle of vehicle mounting. The present invention has solved the above problems and when the present invention is used as an automobile safety glass, it is possible to provide the driver with anti-glare and improved visibility by subtracting the reflection of objects on the automobile dashboard to the vehicle windshield. Suitable for older drivers.

Claims (9)

유리 기판 위에 적어도 2개층 이상의 코팅 막이 존재하며 각각의 코팅막은 서로 다른 굴절률을 갖는 물질들로 구성되어 있으며 고굴절률 물질 층과 저굴절률 물질 층이 순차적으로 유리기판 위에 적층 되어 있는 구조를 갖는 반사방지 기능성 코팅유리At least two coating layers are present on the glass substrate, and each coating layer is composed of materials having different refractive indices, and has a structure in which a high refractive index material layer and a low refractive index material layer are sequentially stacked on the glass substrate. Coated glass 제 1항에 있어서, 유리 기판의 굴절률(n1), 유리기판 상의 첫 번째 코팅막 매질의 굴절률(n2), 두 번째 코팅막 매질의 굴절률(n3), 공기의 굴절률(n4)라 하면 다음과 같은 특징을 갖는 반사방지 기능성 코팅유리The method of claim 1, wherein the refractive index n1 of the glass substrate, the refractive index n2 of the first coating film medium on the glass substrate, the refractive index n3 of the second coating film medium, and the refractive index n4 of air are as follows. Anti-reflective functional coated glass n4 < n3 < n1 < n2n4 <n3 <n1 <n2 제 1항에 있어서, 고굴절률 코팅막은 1.53~2.73의 굴절률을 가지며 5nm이하의 두께로 이루어진 반사방지 기능성 코팅유리The antireflection functional coating glass according to claim 1, wherein the high refractive index coating film has a refractive index of 1.53 to 2.63 and a thickness of 5 nm or less. 제 3항에 있어서, 고굴절률 코팅막은 Si(실리콘) 또는 주석(Sn), 아연(Zn), 규소/주석(Si/Sn), 알루미늄(Al), 지르코늄(Zr), 세륨(Ce), 니오븀(Nb), 텅스텐(W), 비스무스(Bi) 등의 산화물로 이루어진 군으로부터 선택 되어진 적어도 하나이상의 물질로 이루어진 것을 특징으로 하는 반사방지 기능성 코팅유리The method of claim 3, wherein the high refractive index coating film is Si (silicon) or tin (Sn), zinc (Zn), silicon / tin (Si / Sn), aluminum (Al), zirconium (Zr), cerium (Ce), niobium (Nb), tungsten (W), bismuth (Bi) and the like antireflection functional coating glass, characterized in that made of at least one material selected from the group consisting of 제 1항에 있어서, 저굴절률 코팅막은 1.35 ~ 1.53의 굴절률을 가지며 200nm이하의 두께로 이루어진 반사방지 기능성 코팅유리The antireflection functional coating glass according to claim 1, wherein the low refractive index coating film has a refractive index of 1.35 to 1.53 and a thickness of 200 nm or less. 제 5항에 있어서, 저굴절률 코팅막은 SiO2, SiOxNy(실리콘 옥시나이트라이드), SiOxCy(실리콘 옥시카바이드)로 이루어진 군으로부터 선택 되어진 적어도 하나 이상의 물질로 이루어진 것을 특징으로 하는 반사방지 기능성 코팅유리The anti-reflective coating glass according to claim 5, wherein the low refractive index coating film is made of at least one material selected from the group consisting of SiO2, SiOxNy (silicon oxynitride), and SiOxCy (silicon oxycarbide). 유리기판 위의 코팅막들은 스퍼터링 방법에 의해 형성되며 산화물층은 산소-아르곤 코팅챔버 분위기하에서 질화물층은 질소분위기의 코팅챔버에서 이루어지는 반사방지 기능성 코팅유리The coating films on the glass substrate are formed by the sputtering method, and the oxide layer is formed in the oxygen-argon coating chamber atmosphere, and the nitride layer is formed in the coating chamber of the nitrogen atmosphere. 유리 평판 위에 적어도 2개층 이상의 코팅 막이 존재하며 각각의 코팅막은 서로 다른 굴절률을 갖는 물질들로 구성되어 있으며 고굴절률 물질 층과 저굴절률 물질 층이 순차적으로 유리기판 위에 적층 되어 있는 구조로 차후 곡이 있는 모습으로 성형이 가능한 반사방지 기능성 코팅유리At least two coating layers exist on the glass plate, and each coating layer is composed of materials having different refractive indices, and a high refractive index material layer and a low refractive index material layer are sequentially stacked on the glass substrate. Anti-reflective functional coated glass that can be molded into shape 제 8항에 있어서, 코팅막과 함께 성형이 된 유리는 자동차용 앞유리로 사용되기 위해 접합이 가능하며 입사각이 고각(50 ~ 70°)인 광에 대해서도 저반사 성능이 있는 반사방지 기능성 코팅유리The antireflection functional coating glass according to claim 8, wherein the glass molded together with the coating film can be laminated to be used as a windshield for automobiles and has a low reflection performance even for light having a high angle of incidence (50 to 70 °).
KR1020060088000A 2006-09-12 2006-09-12 Antireflective glass for an automobile KR20080023888A (en)

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KR20180045500A (en) * 2016-10-26 2018-05-04 (주)엘지하우시스 Anti-reflective construction glass
WO2018147666A1 (en) * 2017-02-10 2018-08-16 주식회사 케이씨씨 Low-reflection coating glass
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US11767250B2 (en) 2017-11-30 2023-09-26 Corning Incorporated Systems and methods for vacuum-forming aspheric mirrors
US11768369B2 (en) 2017-11-21 2023-09-26 Corning Incorporated Aspheric mirror for head-up display system and methods for forming the same
US11772491B2 (en) 2017-09-13 2023-10-03 Corning Incorporated Light guide-based deadfront for display, related methods and vehicle interior systems
US11772361B2 (en) 2020-04-02 2023-10-03 Corning Incorporated Curved glass constructions and methods for forming same
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US9284214B2 (en) 2009-12-07 2016-03-15 Hytc Co., Ltd. Method for producing coating solution for use in solar collector modules and coating composition produced by the same
WO2011071269A2 (en) 2009-12-07 2011-06-16 주식회사 에이치와이티씨 Method for preparing a coating solution for increasing the light transmittance of solar cell module glass, and coating solution composition prepared by the method
US11597672B2 (en) 2016-03-09 2023-03-07 Corning Incorporated Cold forming of complexly curved glass articles
US11331886B2 (en) 2016-06-28 2022-05-17 Corning Incorporated Laminating thin strengthened glass to curved molded plastic surface for decorative and display cover application
US11338556B2 (en) 2016-06-28 2022-05-24 Corning Incorporated Laminating thin strengthened glass to curved molded plastic surface for decorative and display cover application
US11607958B2 (en) 2016-07-05 2023-03-21 Corning Incorporated Cold-formed glass article and assembly process thereof
US11850942B2 (en) 2016-07-05 2023-12-26 Corning Incorporated Cold-formed glass article and assembly process thereof
US11384001B2 (en) 2016-10-25 2022-07-12 Corning Incorporated Cold-form glass lamination to a display
KR20180045500A (en) * 2016-10-26 2018-05-04 (주)엘지하우시스 Anti-reflective construction glass
US11586306B2 (en) 2017-01-03 2023-02-21 Corning Incorporated Vehicle interior systems having a curved cover glass and display or touch panel and methods for forming the same
US11899865B2 (en) 2017-01-03 2024-02-13 Corning Incorporated Vehicle interior systems having a curved cover glass and a display or touch panel and methods for forming the same
WO2018147666A1 (en) * 2017-02-10 2018-08-16 주식회사 케이씨씨 Low-reflection coating glass
US11261128B2 (en) 2017-02-10 2022-03-01 Kcc Glass Corporation Low-reflection coating glass
US11685684B2 (en) 2017-05-15 2023-06-27 Corning Incorporated Contoured glass articles and methods of making the same
US11332011B2 (en) 2017-07-18 2022-05-17 Corning Incorporated Cold forming of complexly curved glass articles
US11459268B2 (en) 2017-09-12 2022-10-04 Corning Incorporated Tactile elements for deadfronted glass and methods of making the same
US11713276B2 (en) 2017-09-12 2023-08-01 Corning Incorporated Tactile elements for deadfronted glass and methods of making the same
US11919396B2 (en) 2017-09-13 2024-03-05 Corning Incorporated Curved vehicle displays
US11660963B2 (en) 2017-09-13 2023-05-30 Corning Incorporated Curved vehicle displays
US11772491B2 (en) 2017-09-13 2023-10-03 Corning Incorporated Light guide-based deadfront for display, related methods and vehicle interior systems
US11745588B2 (en) 2017-10-10 2023-09-05 Corning Incorporated Vehicle interior systems having a curved cover glass with improved reliability and methods for forming the same
US11768369B2 (en) 2017-11-21 2023-09-26 Corning Incorporated Aspheric mirror for head-up display system and methods for forming the same
US11767250B2 (en) 2017-11-30 2023-09-26 Corning Incorporated Systems and methods for vacuum-forming aspheric mirrors
US11550148B2 (en) 2017-11-30 2023-01-10 Corning Incorporated Vacuum mold apparatus, systems, and methods for forming curved mirrors
US11718071B2 (en) 2018-03-13 2023-08-08 Corning Incorporated Vehicle interior systems having a crack resistant curved cover glass and methods for forming the same
US11518146B2 (en) 2018-07-16 2022-12-06 Corning Incorporated Method of forming a vehicle interior system
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