Tokyo Ohka Kogyo technologies and products contribute to the manufacturing of displays and panels for devices that have become a part of our daily lives, such as smartphones, tablet PCs, and flat-screen TVs. In recent years, panel production has been in constant demand for innovations in reduced weight, thinner profile, and higher image quality. In addition, research and development of cutting-edge technologies such as “wearable displays” and “flexible displays” is progressing at a rapid pace. The synergy between our materials technology and coating technology, which boasts high uniformity as well as high precision, enables us to achieve both higher resolution and more economical displays.

Main Manufacturing Processes for Liquid Crystal Displays (LCDs)

Array Processes

Process Film Deposition

The Thin Film Transistor (TFT) is a thin, uniform layer of material that is deposited on a large surface area glass substrate. The process is carried out using sputtering equipment for the metal film and CVD equipment for the insulating and semiconductor films.

Process Film Deposition

Process Photolithography

Photoresist, a material that reacts to light, is quickly and evenly applied to the entire glass substrate. The next step is to use an exposure device to apply light and copy the TFT pattern formed on the mask according to the designed circuit. During the development process, the photoresist in the exposed area is dissolved by the developing solution, leaving only the TFT pattern intact.
We provide high-definition photoresists for TFTs and transparent materials with high reliability.

Process Photolithography

Process Etching/Resist Stripping

Parts of the pattern not covered by resist are removed to form the circuit. After etching, the photoresist is no longer needed and is removed. We offer a wide range of high purity thinners and stripping solutions.

Process Etching/Resist Stripping

Color Filter Processes

Process Black Matrix Formation/Color Pattern Formation

This is the process of making the color filter board for displaying colors.
First the black and then the RGB color layers are formed. We offer photoresists optimized for various applications, including those for forming black matrices.

Process Black Matrix Formation/Color Pattern Formation

Related Products

Process Liquid Crystal Filling/Assembly

Liquid crystal material is deposited between the TFT substrate and the color filter substrate, and they are bonded together.
The polarizer and backlight are then bonded together to complete the liquid crystal display.

Organic EL Displays

We provide photoresists for Organic Light Emitting Diode (OLED) displays,
which are expected to be the mainstay of next-generation displays.

Touch Panels

In addition to providing black resists for touch panels and insulating materials suitable for the manufacture of touch panels, we also develop and supply UV curing systems that can satisfy both heat resistance and dry-etch resistance as well as releasability.

Process Liquid Crystal Filling/Assembly

OLED Display Related Products

Touch Panel Related Products

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