MoC-2-1 Robust Position Measurement System for Precision Alignment of Roll-to-Roll Printing Using Alignment Patterns and Quantity of Light

抄録

Printed electronics is technology that produces electronic devices and circuits by printing functional ink on a web, which is flexible material like film. It is suitable for large-scaled and high-speed mass production, and is a next-generation process technology that can make electronic devices of flexible material. As precise measurement of positions of the web is required in order to commercialize such process of printed electronics, the measurement system with an optical encoder with the precision of micrometers has been proposed through the preceding research of this paper. However, in the preceding research, there is a limitation of not perceiving the phenomenon of the entire web being moved in the lateral when it happens. In this paper, a measurement system for the lateral positions of web, which utilizes the differences in the amount of light reflected from the alignment patterns depending on the web positions of the lateral direction, has been proposed. According to the proposed method, the noise caused by the printing quality degradation of the alignment patterns can generate measurement error. To reduce it, high measurement precision was obtained by adapting Hilbert transform method robust against noise.