A cell chip; in which the cells are micropatterned on a culture plate, is expected to apply various cell-based assays, such as drug screening, cell transfection, cell differentiation studies, and fundamental cell biological studies, because it can facilitate the observation of cell responses, including high-throughput screening. To develop such a cell chip, the formation of equal cell patterns on the culture plate is a key technology. Several cell patterning techniques for accelerating or inhibitingcell attachments have been reported, such as lithography, photo-reactive polymers, microcontact printing, and so on. However, these techniques involve the use of especial devices for microfabrication or surface modification and complicated processes in chip preparation. Therefore, a simple technique that can form the cell pattern on the culture plate will have advantages over previous methods.
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