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Scratch Resistant Coatings
Hafnium Oxide Scratch Resistant Coatings for Optics
Hafnium Oxide (HfO2) also known as Hafnium Dioxide is a low absorption, high index material with high dielectric constant (25) making it desirable for coatings as it produces hard, scratch resistant insulating coatings for Gold and Aluminum coated optical mirrors.
Hafnium Oxide coatings are absorption-free from 300nm to 10um, and have excellent adhesion to gold, silver and aluminum surfaces. HfO2 coatings also adhere well to glass and other oxides. Hafnia films may be deposited by electron-beam evaporation or sputtering. For applications requiring high packing density and improved homogeneity Ion Assisted Deposition (IAD) may be used.
Contact Valley Design for scratch-resistant, HfO2 coating requirements.
Custom optical thinfilm coatings available from Valley Design