Coating, composed of an optically effective layer system, for substrates, whereby the layer system has a high anti-reflective effect, and method for manufacturing the coating

摘要

A coating for applying to a front side of a substrate, which side is facing an observer, comprises a four-layer system which is optically effective and has a high anti-reflective effect. A first layer of this system is applied onto the front side of the substrate and is, preferably, a highly-refracting TiO2 layer, the second layer is applied to the first layer and is a low-refracting Al2O3 layer, a third layer of the system is applied to the second layer and is, preferably, a high-refracting TiO2, while the fourth layer applied to the third layer is, preferably, a low-refracting SiO2 layer. The layers can be formed by either a pyrolytic method, a plasma-supported chemical vapor deposition method, a sputtering method or a chemical vapor deposition method. Preferably, they are formed by a DC-reactive sputtering method with a magnetron.