OLED Encapsulation

Organic light emitting diode (OLED) devices are extremely sensitive to moisture and oxygen and therefore must be protected with a high performance encapsulating layer. OLEDs require very low permeability levels- for example, water vapor transmission rates (WTVR) <10−5 g/m2•day.

Such low levels of permeability require extremely low pin-hole density. Atomic layer deposition is the only technique that can achieve this level with a film as thin as several hundred of angstroms. Sundew’s ALD-Cap has been used to protect OLED devices with more than x 10-7 lower permeability to gas and water vapor than parylene, as well as other electronic devices exposed to harsh environmental conditions.

Advantages and Benefits

  • 100% conformal
  • Ceramic films
  • Extremely low-permeability barrier to gases, moisture, and more
  • Flexible
  • Superior uniformity
  • Thin coating (200-500 nm)
  • Low temperature deposition (down to 70° C)
  • Atomic level control of film properties