Element comprising transparent substrate and wear-resistant layer with matched reflectivity, and method of manufacture
A transparent element, reflectivity technology, applied in the direction of optical elements, coatings, sputtering plating, etc., can solve the problems of residual stress warping, difficulties, etc.
Pending Publication Date: 2022-03-01
SCHOTT AG
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Problems solved by technology
It can be particularly difficult when applying large thicknesses of hard material coatings, e.g. more than 1 μm, sometimes even more than 2 μm, since in this case residual stresses in the layer can lead to particularly strong warping
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[0076] The invention is not limited to the embodiments described below, but many variations are possible within the scope of the claims. These embodiments relate essentially in particular to a layer system with five layers. However, the invention can also be implemented with a different number of layers. Without being limited to a specific embodiment, it is generally preferred that the layer system comprises at least three layers, particularly preferably at least four layers. It is generally also preferred, in the layer sequence, to have a refractive index n 1 and refractive index n 2 layers alternate. Optionally, one or more further layers having a different refractive index may also be part of the stack. But preferably, alternating with each other have refractive index n 1 and n 2 The layers of are directly adjacent to each other, as is the case in the following examples.
[0077] figure 1 The dependence is shown on the reflectivity of a material having a refractive...
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Abstract
The invention relates to a wear-resistant transparent element (60), in particular a scratch-resistant and / or impact-resistant transparent element, comprising: a substrate (7), preferably a glass or glass ceramic substrate, which is transparent in the visible spectral range of wavelengths of 380 nm to 780 nm, preferably in the wavelength range of 400 nm to 700 nm; and a layer system (70) arranged on the surface (700) of the transparent substrate (7) and having at least two successive layers. The layer system has a layer (71) having a refractive index n1 and a further layer (72) having a refractive index n2, preferably adjoining the layer (71) having a refractive index n1. The refractive index n1 is larger than the refractive index n2. The refractive index n2 has a value of at least 1.60. According to the invention, the element (60) has a reflectivity of at least 2% in the wavelength range of 380 nm to 780 nm, preferably in the range of 400 nm to 700 nm, based on the surface (600) of the element (60), these layers (71, 72) are each formed from an inorganic compound, and the refractive index difference n1-n2 is at least 0.05.
Description
technical field [0001] The present invention generally relates to a transparent element comprising a transparent substrate with a wear-reducing or abrasion-resistant coating, such as a scratch-resistant coating and / or a hard-point damage-resistant coating. The invention relates in particular to a transparent element comprising a transparent substrate with a wear-reducing or wear-resistant multilayer coating, i.e. for example a multilayer scratch-resistant coating and / or a multilayer coating resistant to damage by hard sharp objects, which is different from existing Compared with existing technologies, the reflectivity is reduced and the chromaticity is reduced. Background technique [0002] It is known to increase the wear resistance of glass by applying coatings made of high hardness materials. Different coating materials are used for this depending on the relevant requirements and the substrate material used. For example, such a coating can be configured as an anti-scrat...
Claims
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IPC IPC(8): C03C17/34
CPCC03C17/3435C03C2217/78C03C2218/153C03C2218/156C03C2218/155C23C14/0652C23C14/0676G02B1/14C23C14/0036G02B1/115G02B5/28C23C14/35G02B6/0011
Inventor T·达姆C·亨恩
Owner SCHOTT AG