ITO coating
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.
Application
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
Product properties
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.
Antireflection possibilities with mineral glass
- 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)
Antireflection possibilities with plastic substrates
- 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.