TOKYO OHKA KOGYO CO., LTD. (TOK) provides chemical products, such as photoresist, and equipment for semiconductors and displays.

  • tok's microprocessing technology that creates inspiration
  • tok's new challenge creates a chance in the future
  •  what is "nano"? tok making life more convenient and confortable out of sight

Business Domain

Photolithography technology is TOK's core technology used in semiconductors and Liquid Crystal Displays.

Semiconductor Manufacturing Field

Microprocess technology, such as photoresist, is supporting advancement in the electronics field.

Semiconductor Packaging MEMS Manufacturing Field

TOK's unique packaging / MEMS manufacturing technologies widely support the manufacturing of more compact electronics.


Proposing a new semiconductor manufacturing technology, i.e., multi-layer stacking.

LCD Manufacturing Field

Providing the products and the optimal solutions for many kinds of Panel manufacturing.

New Business Field

Offering high-value-added products for new business field, such as solar panels and nanoimprint-related materials.