Chang Hyeon Ji Professor
Electronic & Electrical Engineering/Semiconductor Engineering/College of Medicine/ Graduate Program in System Health and Engineering
Chang-Hyeon Ji received the B.S. and M.S. degrees in electrical engineering and the Ph.D. degree in electrical engineering and computer science from Seoul National University, Seoul, Korea, in 1995, 1997, and 2001, respectively. He was with the LG Electronics Institute of Technology, Seoul, from 2001 to 2006 as a Senior and Chief Research Engineer, where he developed microactuators for various types of applications, including optical communication and raster scanning laser display system. From 2006 to 2011, he was a Postdoctoral Fellow at the Georgia Institute of Technology, Atlanta, where he researched micro power generators and energy harvesters, and through-wafer interconnection technology for integrated power electronics. In 2011, he joined the faculty of the Department of Electronics Engineering, Ewha Womans University, Seoul, where he is currently working as an Associate Professor. His current research interests include power microelectromechanical systems (MEMS), bio-MEMS, and nanofabrication technology.
- Asan Engineering Building #531
- 02-3277-3895
- Office hours
- 14:00-18:00
Research Record
- Large deflection angle resonant 1D scanning micromirror fabricated with multi jet fusion 3D printed parts INTERNATIONAL JOURNAL OF OPTOMECHATRONICS, 2024, v.18 no.1, 2371289
- Piezoelectric 1D MEMS scanning micromirror fabricated with bulk PZT laminated on stainless steel plate Sensors and Actuators A: Physical, 2024, v.366, 114931
- Single-Crystal PMN-PT-Laminated Piezoelectric Scanning Micromirror for Laser Beam Scanning Applications IEEE Sensors Journal, 2023, v.23 no.18, 21084-21095
- Electromagnetic 2D scanning micromirror fabricated with 3D printed polymer parts for LiDAR applications Sensors and Actuators A: Physical, 2022, v.348, 113997
- Electromagnetic omnidirectional scanning micromirror with multi jet fusion printed structures for smart factory applications Additive Manufacturing, 2022, v.55, 102868
- Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording Journal of Visualized Experiments, 2022, v.2022 no.187, e63460
- Silicon optrode array with monolithically integrated SU-8 waveguide and single LED light source Journal of Neural Engineering, 2022, v.19 no.4, 46013
- Implantable optrode array for optogenetic modulation and electrical neural recording Micromachines, 2021, v.12 no.6, 725
- Low Power Electromagnetic Scanning Micromirror for LiDAR System IEEE Sensors Journal, 2021, v.21 no.6, 7358-7366
- Design optimization of a 6.4 mm-diameter electromagnetic 2D scanning micromirror Optics Express, 2020, v.28 no.21, 31272-31286
- Reliability Analysis of an Epileptic Seizure Detector Powered by an Energy Harvester MICROMACHINES, 2020, v.11 no.1, 45
- MEMS vibrational energy harvesters SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, 2019, v.20 no.1, 124-143
- Multi-wavelength light emitting diode-based disposable optrode array for in vivo optogenetic modulation JOURNAL OF BIOPHOTONICS, 2019, v.12 no.5, UNSP e201800343
- Vacuum packaged electromagnetic 2D scanning micromirror SENSORS AND ACTUATORS A-PHYSICAL, 2019, v.290, 147-155
- Disposable MEMS optrode array integrated with single LED for neurostimulation SENSORS AND ACTUATORS A-PHYSICAL, 2018, v.273, 276-284
- Electromagnetic 2D Scanning Micromirror for High Definition Laser Projection Displays IEEE PHOTONICS TECHNOLOGY LETTERS, 2018, v.30 no.23, 2072-2075
- High-reflectivity electromagnetic two-axis microscanner using dielectric multi-layer reflective surface Sensors and Actuators, A: Physical, 2018, v.276, 186-195
- Impact-based piezoelectric energy harvester as a power source for a neural activity monitoring circuit International Journal of Grid and Distributed Computing, 2018, v.11 no.3, 51-62
- Impact-based piezoelectric vibration energy harvester Applied Energy, 2018, v.214, 139-151
- Electromagnetic linear vibration energy harvester using sliding permanent magnet array and ferrofluid as a lubricant Micromachines, 2017, v.8 no.10
- Piezoelectric vibration energy harvester using indirect impact Transactions of the Korean Institute of Electrical Engineers, 2017, v.66 no.10, 1499-1507
- Electromagnetic biaxial vector scanner using radial magnetic field OPTICS EXPRESS, 2016, v.24 no.14, 15813-15821
- Electromagnetically actuated biaxial scanning micromirror fabricated with silicon on glass wafer Microsystem Technologies, 2016, 2016, 1-11
- Thermal stability simulation of MEMS micro scanner multi-physics simulations coupled with experimental verifications SIMULTECH 2016 - Proceedings of the 6th International Conference on Simulation and Modeling Methodologies, Technologies and Applications, 2016, 2016, 84-88
- Biaxial vector-graphic scanning micromirror using radial magnetic field 2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2015, 2015, 21-25 JUN 2015, 843-846
- Electromagnetic biaxial microscanner with mechanical amplification at resonance OPTICS EXPRESS, 2015, v.23 no.13, 16792-16802
- Electromagnetically actuated 2-axis scanning micromirror with large aperture and tilting angle for lidar applications 2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2015, 2015, 21-25 JUN 2015, 839-842
- Indirect impact based piezoelectric energy harvester for low frequency vibration 2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2015, 2015, 21-25 JUN 2015, 1913-1916
- Low-frequency vibration energy harvester using a spherical permanent magnet with controlled mass distribution Smart Materials and Structures, 2015, v.24 no.6
- Macro fiber composite-based low frequency vibration energy harvester SENSORS AND ACTUATORS A-PHYSICAL, 2015, v.226, 126-136
- Piezoelectric Vibration Energy Harvester Using Indirect Impact of Springless Proof Mass Journal of Physics: Conference Series, 2015, v.660 no.1
- Realistic Circuit Model of an Impact-Based Piezoelectric Energy Harvester JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE, 2015, v.15 no.5, 463-469
- Suppression of surface crystallization on borosilicate glass using RF plasma treatment APPLIED SURFACE SCIENCE, 2014, v.316, 484-490
- Two-dimensional optical scanner with monolithically integrated glass microlens JOURNAL OF MICROMECHANICS AND MICROENGINEERING, 2014, v.24 no.5, Article ID 055009
- [학술지논문] High-Temperature-Resistant Polymer-Based 3-D-Printed Electromagnetic Scanning Micromirror IEEE Sensors Letters, 2024, v.8 no.9 , 1-4
- [학술지논문] Large deflection angle resonant 1D scanning micromirror fabricated with multi jet fusion 3D printed parts INTERNATIONAL JOURNAL OF OPTOMECHATRONICS, 2024, v.18 no.1 , 1-25
- [학술지논문] Piezoelectric 1D MEMS scanning micromirror fabricated with bulk PZT laminated on stainless steel plate SENSORS AND ACTUATORS A-PHYSICAL, 2024, v.366 no.0 , 114931-114931
- [학술지논문] Single-Crystal PMN-PT-Laminated Piezoelectric Scanning Micromirror for Laser Beam Scanning Applications IEEE SENSORS JOURNAL, 2023, v.23 no.18 , 21084-21095
- [학술지논문] Electromagnetic 2D scanning micromirror fabricated with 3D printed polymer parts for LiDAR applications SENSORS AND ACTUATORS A-PHYSICAL, 2022, v.348 no.1 , 113997-113997
- [학술지논문] Electromagnetic omnidirectional scanning micromirror with multi jet fusion printed structures for smart factory applications ADDITIVE MANUFACTURING, 2022, v.55 no.0 , 102868-102868
- [학술지논문] Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording JOVE-JOURNAL OF VISUALIZED EXPERIMENTS, 2022, v.0 no.187 , 63460-63460
- [학술지논문] Silicon optrode array with monolithically integrated SU-8 waveguide and single LED light source JOURNAL OF NEURAL ENGINEERING, 2022, v.19 no.4 , 046013-046013
- [학술지논문] Implantable Optrode Array for Optogenetic Modulation and Electrical Neural Recording MICROMACHINES, 2021, v.12 no.6 , 1-10
- [학술지논문] Low Power Electromagnetic Scanning Micromirror for LiDAR System IEEE SENSORS JOURNAL, 2021, v.21 no.6 , 7358-7366
- [학술지논문] Design optimization of a 6.4mm-diameter electromagnetic 2D scanning micromirror OPTICS EXPRESS, 2020, v.28 no.21 , 31272-31286
- [학술지논문] Reliability Analysis of an Epileptic Seizure Detector Powered by an Energy Harvester MICROMACHINES, 2020, v.11 no.1 , 45-45
- [저역서] Smart sensors and systems - Technology advancement and application demonstrations Springer International Publishing, 2020, 204
- [학술발표] 3D-printed Piezoelectric Vibration Energy Harvester The 11th Asia-Pacific Conference of Transducers and Micro-Nano Technology, APCOT 2024, 싱가폴, 2024-06-26 Proceedings of the 11th Asia-Pacific Conference of Transducers and Micro-Nano Technology, APCOT 2024, 2024
- [학술발표] Microfabricated optical probes for neurostimulation 11th IEEE CPMT Symposium Japan (ICSJ 2022), 일본, 2022-11-09 ICSJ 2022 Proceedings, 2022
- [학술발표] 3D Printed Biaxial Scanning Micromirror for Biomedical Applications 2020 International Conference on Electronics, Information, and Communication (ICEIC), 스페인, 2020-01-22 Proceedings of the 2020 International Conference on Electronics, Information, and Communication, 2020
Courses
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2025-1st
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Electromaganetics Ⅱ
- Subject No 33752Class No 01
- 3Year ( 3Credit , 3Hour) Mon 3~3 (ENG A) , Wed 2~2 (101)
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Advanced Topics in Microsensors and Actuators
- Subject No G16643Class No 01
- Year ( 3Credit , 3Hour) Tue 5~6 (ENG A521)
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Smart Factory Capstone Design
- Subject No G18163Class No 01
- Year ( 3Credit , 3Hour)
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2024-2nd
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Electromagnetics Ⅰ 강의 계획서 상세보기
- Subject No 34300Class No 01
- 2Year ( 3Credit , 3Hour) Tue 3~3 (ENG A) , Thu 2~2 (101)
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Design and Fabrication of Micro-Electro-Mechanical Systems
- Subject No G16631Class No 01
- Year ( 3Credit , 3Hour) Wed 5~6 (ENG A521)
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Smart Factory Capstone Design
- Subject No G18163Class No 01
- Year ( 3Credit , 3Hour)
-
-
2024-1st
-
Electromaganetics Ⅱ
- Subject No 33752Class No 01
- 3Year ( 3Credit , 3Hour) Wed 3~3 (ENG A) , Fri 2~2 (101)
-
Advanced Micro and Nano Systems Engineering
- Subject No G16405Class No 01
- Year ( 3Credit , 3Hour) Wed 5~6 (ENG A521)
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Smart Factory Capstone Design
- Subject No G18163Class No 01
- Year ( 3Credit , 3Hour)
-
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2023-2nd
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Electromagnetics I
- Subject No 34300Class No 01
- 2Year ( 3Credit , 3Hour) Tue 3~3 (ENG A) , Thu 2~2 (101)
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Advanced topics in microsensors and actuators
- Subject No G16643Class No 01
- Year ( 3Credit , 3Hour) Mon 5~6 (ENG A-521)
- Class Hour Changed
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Smart Factory Capstone Design
- Subject No G18163Class No 01
- Year ( 3Credit , 3Hour)
-
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2023-1st
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Electromaganetics II
- Subject No 33752Class No 01
- 3Year ( 3Credit , 3Hour) Tue 4~4 (ENG ) , Fri 5~5 (161)
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Advanced micro and nano systems engineering
- Subject No G16405Class No 01
- Year ( 3Credit , 3Hour) Wed 5~6 (ENG A521)
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Smart Factory Capstone Design
- Subject No G18163Class No 01
- Year ( 3Credit , 3Hour)
-
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2022-2nd
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Electromagnetics I
- Subject No 34300Class No 01
- 2Year ( 3Credit , 3Hour) Tue 6~6 (ENG ) , Thu 4~4 (161)
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Design and Fabrication of Micro-Electro-Mechanical Systems
- Subject No G16631Class No 01
- Year ( 3Credit , 3Hour) Wed 5~6 (ENG A521)
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2022-1st
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Electromaganetics II
- Subject No 33752Class No 01
- 3Year ( 3Credit , 3Hour) Mon 3~3 , Wed 2~2
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Advanced micro and nano systems engineering
- Subject No G16405Class No 01
- Year ( 3Credit , 3Hour) Thu 5~6 (-)
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Academic Background
Seoul Nat'l Univ. 공학박사(전기.컴퓨터공학)