Tokyo Ohka Kogyo Co., Ltd. manufactures and sells chemical products and process equipment in Japan and internationally. The company offers g/i-Line, KrF excimer laser, ArF excimer laser, and EUV photoresists; wet etching and deep dry etching resist; developer and rinse, and stripping solution; thinner; adhesion enhancing, DSA, reflective multilayer, and file formation materials. It provides semiconductor packaging manufacturing products, including lift-off, bump formation, redistribution layer resist, as well as photosensitive liquid repellent coating materials, protective coating materials, and adhesives; CMOS sensors and driving support system; transparent materials and photosensitive permanent films; and display and black resist. In addition, the company offers Sievewill, a life science research tool that traps cells and allows solutions to pass through; photo patternable permanent materials for structure fabrication/photo patternable adhesives materials; optical materials, such as NIL and hydrophilic coating materials; and high functional materials comprising porous polyimide film and mmWave absorber. Further, it is involved in the provision of insurance agency services. The company was incorporated in 1940 and is headquartered in Kawasaki, Japan.