Metal coatings for optical applications

Motivation

In optical coating technologies, metals are indispensable coating materials for a multitude of applications. For example, broadband reflectors with the highest reflectivity can only be realized with metal coatings. Semi-transparent metal films can be applied as beamsplitters with low polarisation. In micro-optics, optical dense metal coatings are used as masks or apertures. Further applications take advantage of properties such as good adhesion, corrosion resistance, or a high melting temperature of metals.

 

Competencies

• Highly reflective and durable Al-, Ag-, and Au-layer systems
• Optical dense metal coatings
• Semi-transparent metal coatings
• Black metal coatings
• Solderable coatings
  
• Multitude of available coating materials: Au, Pt, Pd, Ru, W, Ag, Al, Mo, Ta, La, Cu, Ti, Ni, Cr, NiCr, Zr, Hf, Nb,…
• Thickness accuracy: ∆d/d < 1%
• Coatable substrate size up to:

• 500 x 500 mm² possible

• Deposition onto various substrate materials

 

Our offer

• Development of metal coatings and metal-dielectric coatings
• Optimization of coating properties (stress, roughness, optical properties, electrical properties) according to customer specification
• Prototype coatings