Hwang, Il-Han Yoon, Eui-Sung Lee, Jong-Hyun 2024-01-21T03:03:21Z 2024-01-21T03:03:21Z 2021-09-01 2006-06 1057-7157 https://pubs.kist.re.kr/handle/201004/135475 A reaction force actuator (RFA) was fabricated to translate a microstage with nanostep movement, and its performance was experimentally evaluated using an optical fiber based built-in microinterferometer. The proposed RFA consists of a shuttle mass, movable electrode, fixed electrode, springs, and spring anchor, all of which reside on the movable substrate. The RFA placed on the platform is free to move when the driving force is larger than the static friction. The fixed electrodes are gold-wired to the external electrodes on the platform covered with a dielectric layer for electrical isolation. When external voltage is applied to the electrodes, the springs experience deflections, and the electrostatic force and restoring force react on the movable substrate through the spring anchor and the fixed electrode, respectively. If the driving voltage is large enough that the resultant force overcomes the friction from the platform, the RFA including the movable substrate can make a displacement with no physical collision between the movable and fixed electrodes. In order to suppress the drift motion due to external noise, electrostatic pressure was applied between the movable substrate and the platform on which a 100-mu m-thick dielectric thin film is positioned. The nanomotion of the fabricated actuator was evaluated with various voltages using an optical fiber interferometer. The minimum step movement 1.21 +/- 0.24 mn was experimentally obtained at the driving voltage of 18 V, and the estimated total displacement was 450 mn at the highest affordable driving voltage of 85 V. English IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC A micromachined reaction force actuator (RFA) for a nanomanipulator preparation Article 10.1109/JMEMS.2006.872236 1 JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, v.15, no.3, pp.492 - 497 JOURNAL OF MICROELECTROMECHANICAL SYSTEMS 15 3 492 497 scie scopus 000238311000005 2-s2.0-33745151443 Engineering, Electrical & Electronic Nanoscience & Nanotechnology Instruments & Instrumentation Physics, Applied Engineering Science & Technology - Other Topics Instruments & Instrumentation Physics Article interferometer microelectromechanical systems (MEMS) microactuator nanostep reaction force