Indium tin oxide (ITO), an important material used as a transparent conductive oxide in thin-film transistor liquid-crystal display fabrication, was patterned by a nonlithographic process. First, a substrate coated with photoresist was patterned by a projection photoablation process using wavelength KrF excimer laser radiation. ITO was then deposited by sputtering and patterned by lift-off. The resulting ITO pattern was clean even though it was patterned without the conventional steps of photoresist development and ITO etching. This process technology provides a faster and more economical patterning capability compared to conventional photolithography and etch processes used in the display industry.
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© 2007 American Institute of Physics.
2007
American Institute of Physics
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