ITO & TCOs

Liquid-crystal displays, the multitude of organic light-emitting diode (OLED) variants, and most other flat-panel display technologies rely on transparent conductive oxides (TCOs) such as indium tin oxide (ITO) to transport current and to serve as the anode for each light-emitting element.

 

Knowing the thickness of the layers that form the display is an important advantage in any thin-film process. For LCDs, determining thickness requires a way to measure the polyimide and liquid-crystal layers in addition to the ITO layer. For OLEDs, a thickness measurement must examine the emitting, injecting, and encapsulation layers.
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ITO Coating

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Actual thickness measured using Filmetrics

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