And look at 0.1mm ultra-thin flexible AMOLED screen

The 0.3mm ultra-thin OLED screen at the beginning of this month of TDK Corporation of Japan makes people admire, and now ITRI of Taiwan Industrial Technology Research Institute has developed 6-inch flexible AMOLED screen, the thickness reaches astonishing 0.1mm.

The AMOLED screen adopts FlexUPD multi-purpose flexible electronic substrate technology, displaying images as usual in a folded state, with a winding radius of 5 cm or less, and reaching 15,000 winding lives. Before this, Sony introduced a flexible OLED screen that can perform 1000 windings.

According to the Taiwan Institute of Industrial Technology, FlexUPD is currently the simplest and cheapest paper display production technology. This technology will soon be widely used, and AUO has planned to use it on its own flexible eBook reader. .

It is reported that this technology is inspired by the production of moist cakes (a thin, paper-like pancake in Taiwan) because currently flexible display panel production technology requires a flexible substrate to be bonded to a hard, flat, rigid base. The electronic components and various panels are fabricated and placed layer by layer on the flexible substrate, and the completed flexible display panel is removed from the base after the wiring is completed. The reason for doing this is because in the process of manufacturing the delicate display component, the position and flatness of the flexible substrate need to be accurately fixed, and the error can only be calculated in micrometers so that the electronic components do not misalign.

This requires that the flexible substrate be firmly integrated with the base and that it can be easily detached from the base, which becomes a problem in production. However, the Taiwan Institute of Industry and Technology has been inspired by the process of making cakes: “As if a layer of easy-to-tear intermediate material was added between the cake and the pan, the cake could be smoothly removed from the pan without damage.”

The cake is very thin, and the craftsman will skillfully apply the soft dough on the hot plate and shape it instantly. The moist cake will not stick to the pan and can be quickly removed. In addition to the material itself, the other key is the producer in the furnace. A layer of oil is applied before the dough is applied on the board.

FlexUPD is an imitation of this technology: through the addition of a special layer of material called a "departure layer" in the production process, the conflicting requirements in the production of flexible displays are met. At the time of production, the release layer fixes the flexible substrate and the base by adhesive so as to facilitate accurate alignment in production; and after all the processes are completed, only a simple cutting process is required, and the flexible panel and the base can be easily put. separate. In the production process of the flexible display panel, the effect of the release layer is similar to that of a paper cup.