Thin film coatings are extremely thin layers of materials (such as TiO2, SiO2, MgF2, gold, aluminum etc…), which can be applied to the surface of a substrate like glass, metal or germanium, to effect a change in its optical properties. Effects such as reflection, refraction, anti reflection and conductivity can be produced and modified by expert calibration of the number of layers and the respective thicknesses of the thin film coatings in relation to the incidental wavelengths of light.

Conductive Coatings (ITO Coatings)

Reynard Corporation provides thin film conductive coatings (ITO and Gold) to the commercial, aerospace and military markets. These transparent thin film conductive coatings can be applied to our own high quality optical components and substrates, or to a substrate supplied by the customer.

Conductive Coating Applications

Conductive or ITO coatings are used in applications where it is necessary to dissipate electrical charges while not losing the optical properties of the particular substrate or optical component. Thin film conductive coatings are widely used on aircraft windows, automotive windshields, and solar cell arrays. The transparent conductive coatings are also used for static elimination, holography, heaters and EMI / RFI shielding.

Examples of Our Thin Film Conductive Coatings

• Indium Tin Oxide (ITO) Transparent Conductive Coating:

  This transparent conductive film can be applied to glass or plastic optical elements. Ohms per square will be approximately 35 and the transmission will be approximately 85%, with a reflectance rate of less than 8%. This film can withstand a temperature range from -50 to 175 degrees C.

• Protective Gold Transparent Conductive Coating:

  This coating is composed of dielectric materials on both sides with a gold coating to improve transmission and durability. Visible transmission is approximately 75% and resistance around 20%, with a reflectance rate of 8%. Temperature range is from -50 to 200 degrees C.

Conductive Coating Process

At Reynard Corporation we have over 28,000 square feet of manufacturing space where we engineer and manufacture the very highest quality optical components. Our thin film coating facility has 21 vacuum chambers, ranging from an 18" bell jar to a 54" fully automatic box coater, all in a 4000 square foot Class 1000 clean room. Processes include electron beam, ion assisted and resistance source deposition. We have the capability to coat virtually any size and shape up to and including substrates 50" in diameter.

Available substrates include:

• Alon
• BK-7 (borosilicate crown glass)
• Calcium Fluoride (CaF2)
• Fused Silica
• Germanium (GE)
• KRS5 ( Thallium Bromo-Iodide)
• Sapphire
• Magnesium Fluoride (MgF2)
• Silicon (Si)
• Zinc Selenide (ZnSe)
• Zinc Sulfide (ZnS)
• Or as provided by the customer.

Coating materials for conductive applications typically include Indium Tin Oxide (ITO) and may also use hybrid coatings such as thin gold.

Stock Components with Conductive Coatings or Custom Coating Services

Our thin film conductive coatings can be engineered and customized for your particular application, and we also have one of the largest and most comprehensive selection of standard and stock precision optical components in the world. Reynard Corporation is the leading global supplier of optical components to the aerospace, commercial and military markets. We take pride in meeting and exceeding our customers' expectations in concept, design, engineering, and fabrication.

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Reynard Corporation operates per Military Specification Mil-I-45208A.

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