TOK is helping protect the environment by supplying products that incorporate exclusive technologies accumulated over many years.
Color filters are essential to the operation of color LCDs. The filter has four colors: red, green, blue and a black matrix. Chrome is normally used to form the black matrix. However, we have eliminated chrome, which is a source of pollution, by replacing it with a black resist.
Normally, an LCD glass substrate is coated using the spin process, a method in which centrifugal force is used to apply photoresist evenly to a substrate. In this process, a substrate must be spun at high speed after a drop of photoresist is placed in the center. However, much of the photoresist simply flies off the substrate and is lost. Additionally, spinning substrates consumes a lot of electric power. Another problem is the growing size of these substrates, which makes them more difficult to spin.
* Spinless® : Registered trademark in Japan, No. 4,731,631
The TR130000 S Spinless® coating machine for 8-generation glass substrates