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

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Panel Manufacturing Field


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

Realizing both LCD’s high resolution and economic efficiency by synergy effects from the combination of sophisticated materials technology developed over the years and coating technology with excellent uniformity


  • Photoresists
    • TFR series (High-sensitivity positive type for TFT)
    • TFR-DI series (High-sensitivity i-line positive type for TFT)
    • CFPR BK series (Black resist for color filter BM forming)
    • PMER P7100 series (High-sensitivity positive type for STN)
  • Other materials
    • TPAR series (High-reliability transparent materials)
    • MOF INK (Overcoat for transparent electrodes)
    • Thinner, Stripping solution, OAP, CFPR rinse
    • TPSR series (Materials for Photo Spacer)

For Organic EL

  • Photoresists
    • TELR-N series (Negative type for cathode separators)
    • TELR-P series (Positive type for insulating layers)

For Touch Panel

  • Photoresists
    • WTP BK series(Black resist for touch panel)
  • Other materials
    • Insulator products
    • Overcoat products