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Tokyo Ohka Kogyo Co., Ltd. was founded in 1940. Tokyo Ohka Kogyo (TOK) plays an important but small (perhaps even a micro) role. Serving companies in the microprocessing industry, TOK manufactures photoresists (light-sensitive resins that can imprint patterns onto silicon wafers) used during the production of semiconductors, printed circuit boards, and flat panel plasma and liquid crystal displays (LCD). The company operates through several subsidiaries located in Japan, the US, Europe, and Asia. In addition to its photoresist operations, which make up about half of its overall sales, TOK also operates a chemicals division and a photoresist-related equipment division.

Toppan Photomasks, Inc. was founded in 1985 and is based in Round Rock, Texas. Toppan Photomasks, Inc. company’s photomasks are quartz or glass plates that contain precision images of integrated circuits and are used as masters by semiconductor manufacturers to optically transfer these images onto semiconductor wafers. The company, through its wholly owned subsidiary, BindKey Technologies, Inc., develops electronic design automation software that is used by integrated circuit (IC) design engineers to design an IC, which can then be transferred onto photomasks. Its customers include integrated device manufacturers, semiconductor foundries, and fabless semiconductor companies. The company has collaboration with Applied Materials, Inc. for the joint development of advanced photomasks supporting 90nm and 65nm technology.

Towa Intercon Technology, Inc. company makes equipment used in the back end of semiconductor production. After front-end equipment deposits precise layers of materials onto silicon wafers and then etches circuit patterns into these layers, back-end gear gets chips ready for use by cutting apart the wafers and packaging the resulting chips into molded plastic housings. Towa Intercon makes specialized sawing systems that divide wafers into individual chips through a process called singulation. The company also markets chip package molding devices from Japan-based semiconductor equipment maker TOWA. Towa Intercon is a wholly owned subsidiary of TOWA.

Trio-Tech International, Inc. was founded in 1958 and is headquartered in Van Nuys, California. Trio-Tech International (TTI) provides third-party semiconductor testing and burn-in services primarily through its laboratories in Southeast Asia. The Company also designs, manufactures and markets equipment and systems to be used in the process of testing semiconductors at its facilities in California and Southeast Asia, and distributes semiconductor processing and testing equipment manufactured by other vendors. The Company operates in three segments: testing services, manufacturing, distribution and real estate. In April 2009, Trio-Tech International Pte., Ltd. set up a new entity, SHI International Pte., Ltd. (SHI), in which Trio-Tech International Pte., Ltd. holds 55% of the ownership interest. On April 7, 2009, SHI entered into a share purchase agreement, pursuant to which SHI acquired from Erni Susanto Susi, Dwi Kartikarini and PT SAS International shares of PT SAS Heavy Industry (SASHI). SASHI engages in engineering and fabrication work for oil and gas companies.

Ultratech, Inc. was founded in 1979 and is headquartered in San Jose, California. Ultratech, Inc. develops, manufactures, and markets photolithography and laser thermal processing equipment. It offers step-and-repeat photolithography systems based on one-to-one imaging technology to semiconductor device manufacturers for applications involving line geometries of 0.75 microns or greater and to nanotechnology manufacturers. The company's steppers are also used to manufacture semiconductors that are used in various applications, such as telecommunications, automotive control systems, power systems, and consumer electronics. In addition, it offers LSA100, a laser-based thermal annealing tool used by the semiconductor industry for various process steps, including activation of implanted impurities, dielectric film formation, formation of silicides, and stabilization of copper grain structure. Ultratech sells its products to advanced packaging, thin film head, ink jet printer/accelerometer, semiconductor, and various other nanotechnology manufacturers in North America, Europe, Japan, Taiwan, and the rest of Asia.

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