Mechanism design with rotational and positioning calibrations for double-sided structure replication

This study is designing a mechanism with functions of rotational and positioning calibrations. This mechanism was applied to a hot embossing mold used for replications of double-sided structure. The hot embossed product was measured for double sided structures. The rotational and positioning alignment errors for both sides were measured by using a microscope. According to the results, the errors were calibrated wit this mechanism. The positioning and rotational resolutions of this mechanism are 40 μm and 0.5°, respectively. The results show that the mechanism has acceptable calibration accuracy. The average calibration accuracy for X-axis, Y-axis and C-axis were 92.5, 91.75 and 98.67 %, respectively. The small errors were induced by the large temperature difference between upper die and lower die during rapid cooling of a hot embossing process.