Gas Is A Key Material For Display Manufacturing

- Jul 26, 2018-

Since the introduction of active-matrix thin-film transistor (TFT) displays in the 1990s, it has become an integral part of modern life. Its application is far from TV sets and smartphones. It also exists in our daily life. The main communication and information tools in life: watches (wearable devices), electrical appliances, advertising, signs, cars, etc. This article focuses on the specialty gases required to display the manufacturing process blocks and provides an overview of the various gas supply modes.

There are many similarities between TFT display manufacturing and semiconductor device manufacturing. For example, both manufacturing processes require the use of large amounts of gases, such as deposition, etching, cleaning, and doping in process steps, as well as other steps. The gas types are also similar.


Display device layering

There are currently two types of displays on the market: Active Matrix Liquid Crystal Display (AMLCD) and AMOLED. The basic components of the AMLCD and AMOLED display are the same. The display device has 4 layers (Fig. 1): a color filter layer, a thin film transistor switch layer (gas is mainly used for this layer), a shutter layer for controlling color selection, and an RGB (red, green, and blue) color filter.