Electronics, Volume 12, Issue 24
2023 December-2 - 161 articles
Cover Story: A macro–micro dual-drive positioning system was developed for Scanning Beam Interference Lithography (SBIL), which uses a dual-frequency laser interferometer as the position reference and exhibits the characteristics of long travel, heavy load, and high accuracy. The macro-motion system adopts a friction-driven structure and a feedforward PID control algorithm, and the stroke can reach 1800 mm. The micro-motion system adopts a flexible hinge–plus-PZT driving method and a PID control algorithm based on neural networks, which achieves sufficient positioning accuracy of this system at the nanometer level. Additionally, the sources and effects of errors during the motion process were assessed in detail. Finally, the experimental results show that the workbench can locate at the nanoscale within the full range of travel, which can satisfy the SBIL exposure requirement. View this paper - Issues are regarded as officially published after their release is announced to the table of contents alert mailing list .
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