Development of QTAT online electronic circuit patterning system

Katsuhiko Wakasugi, Satoshi Wakimoto, Takayuki Akamichi, Akira Nakada, Hiroshi Kubota, Tsuneo Inokuchi, Shinji Suzuki, Sou Aikawa, Kouji Kosaka, Kazumitsu Nakamura, Tatsuo Morimoto

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)


    An arbitrary pattern exposure system has been developed by employing a liquid crystal display (LCD) with 1600 × 1200 pixels for the formation of projection images in place of a conventional reticle. The minimum pattern size becomes 11.5 μm, which corresponds to the aperture size of each pixel on the LCD. For the purpose of quick turnaround time (TAT), the exposure system was directly connected to the circuit design system with the transmission control protocol/internet protocol network. From the experimental results on patterning of a typical electronic circuit data with the area of 46 × 46 mm, it was confirmed that the TAT from the output of design data to the finish of the exposure becomes less than 28 min. By using this system, reduction of the production cost in the printed wiring boards fabrication is expected.

    Original languageEnglish
    Pages (from-to)487-493
    Number of pages7
    JournalIEEE Transactions on Semiconductor Manufacturing
    Issue number4
    Publication statusPublished - 2005 Nov


    • Liquid crystal display (LCD)
    • Lithography
    • Printed circuits

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Industrial and Manufacturing Engineering
    • Electrical and Electronic Engineering


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