ITO coated windows

For an optimum combination of high transmission and best properties, MTC offers shielded windows, which are usually used for visual display instruments or electronic housings.

Depending on the application, you can choose between different designs and materials to achieve the best values for e.g. transmission, electrical conductivity, breakage resistance or scratch resistance.

  • Very good shielding effectiveness
  • ITO-coating can be applied both on glass or on plastic
  • A transmission up to 99% can be achieved

More details about shielded windows

ITO (Indium Tin Oxide) coatings can be applied on glass as well as on plastic.

  • On plastic ITO is applied under vacuum at lower temperature. Surface conductivities up to < 10 Ohm-square can be reached.
  • On glass a higher temperature can be used and therefore surface resistance can be reduced to < 2,5 Ohm-square.

ITO coated windows are mainly applied for:

  • EMI/RFI shielding
  • (protection against electro static discharge)
  • heated optical filters for displays
  • active components for touch-screens

Light transmission, absorption and reflection are determined by the properties and the colour of the base material. The thickness of the coating is choosen in relation to the wave length in the application to guarantee the best light transmission. Standard coatings are choosen for optimum light transmission. Generally they are between 525 und 600 nm.

Typical transmission of a 20 Ohm-square coating is 84 %.

Silver busbar will be used to create a contact area from the coating to the surface of the substrate.

  • Multi-layer coating according to MIL SPEC 675 B (less than 0,6% rest of reflection)
  • Single-layer coating according to DIN 58197 (less than 1,5% rest of reflection)
  • Chemical etching:

  5% anti reflecion (called GW 80)
  9% anti reflection (called GW 100)
13% anti reflection (called GW 120)

  • Multi-layer coating according to MIL SPEC 675 B (less than 0,6% rest of reflection)
  • Single-layer coating according to DIN 58197 (less than 1,5% rest of reflection)Chemical etching (very diffuse)
  • Chemical etching (very diffuse)
  • Anti-scratch, anti-reflection coating by spraying

Due to additional  "index-match-coating" a transmission up to 99% can be reached.