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DontechPerformance Enhancing Thin Film Coatings and Services

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Dontech specializes in the provision of high-quality thin film coatings technology, offering various advanced techniques such as DC and AC magnetron sputtering, ion-enhanced E-beam evaporation, and chemical vapor deposition (CVD). These optical coatings are suitable for a wide range of rigid and flexible substrates, including various types of glass, PET plastic, and crystalline materials. Functional coating technologies encompass antireflective coatings, transparent conductive coatings for EMI RFI shielding, heat-reflecting films (IR blocking), heaters, and dichroic filters such as band-pass, long-pass, and circular polarizers. The coatings enhance the optical, electrical, and environmental properties of the materials for performance improvement. Dontech's engineering and technical support team is well-versed in precision optics and high-performance display markets, often acting as an extension of the customer's engineering departments, providing support from concept through to final system delivery. Additionally, Dontech offers toll coating services, applying coatings to customer-supplied substrates, and provides a wide range of testing capabilities to ensure product compliance with industry and custom specifications.

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Common Coatings

1 to 100+ layer coating stacks with individual layer thickness ranging from 100 to 4,000 angstroms can be applied to a broad range of materials.

  • Antireflective Coatings – Single layer and multilayer; designed for UV, visible, NIR, MIR, and FIR (out to 25 microns) for substrates with and index from 1.47 to 4.0 and Angle of Incidence (AOI) from 0 to 60 degrees
  • Non-Conductive Oxides – (e.g., SiO2, TiO2, AlO2)
  • Metallic Coatings – (e.g., Silver, gold, copper, chromium, nickel, nichrome, stainless steel, palladium, platinum, titanium)
  • Mirrors
    • Dielectrically enhanced metallic
    • Dichroic
  • Transparent Conductive Oxides – (e.g., ITO, AZO)
    • < 1 ohm/sq to >100 ohms/sq
    • Dielectrically enhanced
  • Dichroic Filters
    • Narrow Band Pass
    • Short Wave Pass
    • Long Pass
    • Band Rejection
    • Beamsplitters
  • Other – Developmental

Common Substrates

Crystalline Substrates

  • Fused Quartz
  • Sapphire
  • Silicon (Si)
  • Zinc Sulfide (ZnS)
  • Zinc Selenide (ZnSe)

Glass Substrates – Options include annealed, tempered, and chemically strengthened

  • Aluminosilicate
  • Borosilicate
  • Boro-aluminosilicate
  • Borosilicate-crown (N-BK7)
  • Fused Silica
  • Soda Lime

Plastic Substrates

  • Acrylic
  • Allyl Diglycol Carbonate (ADC)
  • Cellulose Triacetate (TAC)
  • Polarizers (linear & circular)
  • Polycarbonate (PC)
  • Polyethylene Terephthalate (PET)