The OLED (Organic Light Emitting Diodes) display emits light by conducting electricity to the RGB organic light emitting materials that are sandwiched between the electrodes.
Since OLEDs are self-emissive displays, they don't require backlight units like LCD displays. OLEDs have many outstanding characteristics such as thin and flexible form factor, lightweight, high image quality.
In particular, flexible OLED displays, which use flexible substrates such as polyimide instead of glass, are foldable or rollable, so demand is increasing mainly for mobile devices.
Flexible substrate formation
Varnish * is coated on the carrier glass and heat treated to form a flexible substrate (PI). ＊Varnish: Polyamic acid solution (precursor of PI)
Coater Line (SK-P Series)
A backplane consisting of TFTs (thin film transistor circuit) and banks (partition wall for an organic light emitting layer) is formed on a flexible substrate.
Substrates, which will serve as the base material, are cleaned to remove adhered micron-sized particles (dust) and organic residues.
Cleaning Processor (TS Series)
A thin film is formed (deposited) on the substrate as a layer of circuit material.