Protective layer for optical coatings with enhanced...

Details Protective layer for optical coatings with enhanced... Protective layer for optical coatings with enhanced...

C - Chemistry, Metallurgy

03

C

C03C 17/34 (2006.01) C03C 17/36 (2006.01)

Patent

CA 2550446

An oxidizable metal silicide or metal aluminide is used as one of the outer layers of an optical coating to provide a corrosion and scratch resistant barrier. This layer is initially deposited in an unoxidized or partially oxidized state. In this chemical state it provides corrosion protection to the layers underneath. The metal compound or intermetallic layer has hardness properties greater than most metals and therefore provides significant scratch protection.

Pour créer un écran résistant à la corrosion et au rayage, on utilise un siliciure de métal oxydable ou un aluminure de métal pour l'une des couches extérieures du revêtement optique. Cette couche est d'abord déposée dans un état non oxydé ou partiellement oxydé. A l'état chimique, cette couche protège les couches sous-jacentes contre la corrosion. Le composé métallique ou la couches intermétallique, qui possède des caractéristiques de dureté supérieures à celles de la plupart des métaux, assure une protection efficace contre le rayage.

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