Over the last 20 years displays have become thinner and thinner, while screen size and resolution have continously been increased. Technological development continues as consumers push for higher resolutions (4K2K or even 8K4K) and larger display sizes, yet they are willing to pay only moderate prices.
The semiconductor material as part of the so-called thin film transistor (TFT) backplane has a big impact on the performance of the display. Currently used amorphous silicon does no longer fulfill the performance requirements while low temperature polysilicon (LTPS) is expensive and limited in size. IGZO is promising yet its production process is very challenging. All these technologies pose a serious dilemma to the industry, one that Evonik was keen to overcome.