Abstract
Products with printed electronics technology can be easily found around us. It is a technology used in various fields such as RFID, flexible displays, and solar panels. Such products feature multi-layer structures rather than using a single pattern layer for printing. A product with excellent performance can be obtained only when overlay printing is performed well in a multi-layer structure. Therefore, to improve overlay accuracy, the effect of film deformation should be considered and compensated. However, deformation of the film is caused by tension applied to the film or heat during the drying process. In this paper, the deformation of the film is compensated by analyzing the register error after printing in the screen overlay printing process, one of the roll-to-roll process technologies. The tendency of film deformation is compensated by measuring the register error by comparing the reference register mark with the additional overprinted register mark, and analyzing the repetitive register error that occurs during overprinting. And it is verified that the overlay accuracy is improved through screen printing to which this compensation system is applied.
