이화여자대학교

Chang Hyeon Ji Professor

Electronic & Electrical Engineering / Graduate Program in System Health and Engineering / Semiconductor Engineering / College of Medicine

지창현 프로필 사진 
Chang-Hyeon Ji is a Professor in the Department of Electronic and Electrical Engineering and the Graduate Program in Smart Factory at Ewha Womans University. He received his B.S., M.S., and Ph.D. degrees in Electrical Engineering and Computer Science from Seoul National University in 1995, 1997, and 2001, respectively.

His career spans both high-level industrial R&D and academic innovation. Prior to joining Ewha in 2011, Dr. Ji served as a Senior and Chief Research Engineer at the LG Electronics Institute of Technology, where he led the development of microactuators for optical communications and laser display systems. He later expanded his research as a Postdoctoral Fellow at the Georgia Institute of Technology (2006–2011), focusing on integrated power electronics, wireless power transfer, and advanced energy harvesting technologies.

His current research interests lie at the intersection of Power MEMS, Bio-MEMS, Optical MEMS, and Nanofabrication, driving advancements in micro-scale systems and integrated technologies.
  • cji@ewha.ac.kr
  • Asan Engineering Building #531
  • 02-3277-3895
  • Office hours
    • 14:00-18:00
  • Research Interests
    • Microelectromechanical systems, Optical MEMS, Bio MEMS, Power MEMS, Nanofabrication
  • sdg09
  • sdg08
  • sdg07
Research Record
  • 3D-printed scanning micromirror with improved mechanical and thermal properties for LiDAR applications SENSORS AND ACTUATORS A-PHYSICAL, 2025, v.387, 116455
    SCIE Scopus dColl.
  • 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
    SCIE Scopus dColl.
  • Piezoelectric 1D MEMS scanning micromirror fabricated with bulk PZT laminated on stainless steel plate Sensors and Actuators A: Physical, 2024, v.366, 114931
    SCIE Scopus dColl.
  • Single-Crystal PMN-PT-Laminated Piezoelectric Scanning Micromirror for Laser Beam Scanning Applications IEEE Sensors Journal, 2023, v.23 no.18, 21084-21095
    SCIE Scopus dColl.
  • Electromagnetic 2D scanning micromirror fabricated with 3D printed polymer parts for LiDAR applications Sensors and Actuators A: Physical, 2022, v.348, 113997
    SCIE Scopus dColl.
  • Electromagnetic omnidirectional scanning micromirror with multi jet fusion printed structures for smart factory applications Additive Manufacturing, 2022, v.55, 102868
    SCIE Scopus dColl.
  • Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording Journal of Visualized Experiments, 2022, v.2022 no.187, e63460
    SCIE Scopus dColl.
  • Silicon optrode array with monolithically integrated SU-8 waveguide and single LED light source Journal of Neural Engineering, 2022, v.19 no.4, 46013
    SCIE Scopus dColl.
  • Implantable optrode array for optogenetic modulation and electrical neural recording Micromachines, 2021, v.12 no.6, 725
    SCIE Scopus dColl.
  • Low Power Electromagnetic Scanning Micromirror for LiDAR System IEEE Sensors Journal, 2021, v.21 no.6, 7358-7366
    SCIE Scopus dColl.
  • Design optimization of a 6.4 mm-diameter electromagnetic 2D scanning micromirror Optics Express, 2020, v.28 no.21, 31272-31286
    SCIE Scopus dColl.
  • Reliability Analysis of an Epileptic Seizure Detector Powered by an Energy Harvester MICROMACHINES, 2020, v.11 no.1, 45
    SCIE Scopus dColl.
  • MEMS vibrational energy harvesters SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, 2019, v.20 no.1, 124-143
    SCIE Scopus dColl.
  • Multi-wavelength light emitting diode-based disposable optrode array for in vivo optogenetic modulation JOURNAL OF BIOPHOTONICS, 2019, v.12 no.5, UNSP e201800343
    SCIE Scopus dColl.
  • Vacuum packaged electromagnetic 2D scanning micromirror SENSORS AND ACTUATORS A-PHYSICAL, 2019, v.290, 147-155
    SCIE Scopus dColl.
  • Disposable MEMS optrode array integrated with single LED for neurostimulation SENSORS AND ACTUATORS A-PHYSICAL, 2018, v.273, 276-284
    SCIE Scopus dColl.
  • Electromagnetic 2D Scanning Micromirror for High Definition Laser Projection Displays IEEE PHOTONICS TECHNOLOGY LETTERS, 2018, v.30 no.23, 2072-2075
    SCIE Scopus dColl.
  • High-reflectivity electromagnetic two-axis microscanner using dielectric multi-layer reflective surface Sensors and Actuators, A: Physical, 2018, v.276, 186-195
    SCIE Scopus dColl.
  • 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
    Scopus dColl.
  • Impact-based piezoelectric vibration energy harvester Applied Energy, 2018, v.214, 139-151
    SCIE Scopus dColl.
  • Electromagnetic linear vibration energy harvester using sliding permanent magnet array and ferrofluid as a lubricant Micromachines, 2017, v.8 no.10
    SCIE Scopus dColl.
  • Piezoelectric vibration energy harvester using indirect impact Transactions of the Korean Institute of Electrical Engineers, 2017, v.66 no.10, 1499-1507
    Scopus KCI dColl.
  • Electromagnetic biaxial vector scanner using radial magnetic field OPTICS EXPRESS, 2016, v.24 no.14, 15813-15821
    SCIE Scopus dColl.
  • Electromagnetically actuated biaxial scanning micromirror fabricated with silicon on glass wafer Microsystem Technologies, 2016, 2016, 1-11
    SCIE Scopus dColl.
  • 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
    Scopus dColl.
  • 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
    Scopus dColl.
  • Electromagnetic biaxial microscanner with mechanical amplification at resonance OPTICS EXPRESS, 2015, v.23 no.13, 16792-16802
    SCIE Scopus dColl.
  • 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
    Scopus dColl.
  • 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
    Scopus dColl.
  • Low-frequency vibration energy harvester using a spherical permanent magnet with controlled mass distribution Smart Materials and Structures, 2015, v.24 no.6
    SCIE Scopus dColl.
  • Macro fiber composite-based low frequency vibration energy harvester SENSORS AND ACTUATORS A-PHYSICAL, 2015, v.226, 126-136
    SCIE Scopus dColl.
  • Piezoelectric Vibration Energy Harvester Using Indirect Impact of Springless Proof Mass Journal of Physics: Conference Series, 2015, v.660 no.1
    Scopus dColl.
  • Realistic Circuit Model of an Impact-Based Piezoelectric Energy Harvester JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE, 2015, v.15 no.5, 463-469
    SCIE KCI Scopus dColl.
  • Suppression of surface crystallization on borosilicate glass using RF plasma treatment APPLIED SURFACE SCIENCE, 2014, v.316, 484-490
    SCIE Scopus dColl.
  • Two-dimensional optical scanner with monolithically integrated glass microlens JOURNAL OF MICROMECHANICS AND MICROENGINEERING, 2014, v.24 no.5, Article ID 055009
    SCIE Scopus dColl.
  • [학술지논문] 3D-printed scanning micromirror with improved mechanical and thermal properties for LiDAR applications SENSORS AND ACTUATORS A-PHYSICAL, 2025, v.387 no.. , 116455-.
    SCIE
  • [학술지논문] High-Temperature-Resistant Polymer-Based 3-D-Printed Electromagnetic Scanning Micromirror IEEE Sensors Letters, 2024, v.8 no.9 , 1-4
    Scopus
  • [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
    SCIE
  • [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
    SCIE
  • [학술지논문] Single-Crystal PMN-PT-Laminated Piezoelectric Scanning Micromirror for Laser Beam Scanning Applications IEEE SENSORS JOURNAL, 2023, v.23 no.18 , 21084-21095
    SCIE
  • [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
    SCI
  • [학술지논문] Electromagnetic omnidirectional scanning micromirror with multi jet fusion printed structures for smart factory applications ADDITIVE MANUFACTURING, 2022, v.55 no.0 , 102868-102868
    SCI
  • [학술지논문] Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording JOVE-JOURNAL OF VISUALIZED EXPERIMENTS, 2022, v.0 no.187 , 63460-63460
    SCIE
  • [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
    SCIE
  • [학술지논문] Implantable Optrode Array for Optogenetic Modulation and Electrical Neural Recording MICROMACHINES, 2021, v.12 no.6 , 1-10
    SCIE
  • [학술지논문] Low Power Electromagnetic Scanning Micromirror for LiDAR System IEEE SENSORS JOURNAL, 2021, v.21 no.6 , 7358-7366
    SCIE
  • [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
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Courses

  • 2026-1st

    • Electromaganetics Ⅱ

      • Subject No 33752Class No 01
      • 3Year ( 3Credit , 3Hour) Mon 3~3 (ENG ) , Wed 2~2 (161)
        • Syllabus(File)

    • Design and Fabrication of Micro-Electro-Mechanical Systems

      • Subject No G16631Class No 01
      • Year ( 3Credit , 3Hour) Tue 5~6 (ENG A521)
        • Syllabus(File)

  • 2025-2nd

    • Electromagnetics Ⅰ

      • Subject No 34300Class No 01
      • 2Year ( 3Credit , 3Hour) Tue 3~3 (ENG ) , Thu 2~2 (159)
        • Syllabus(File)

    • Electromagnetics Ⅰ

      • Subject No 34300Class No 02
      • 2Year ( 3Credit , 3Hour) Wed 3~3 (ENG A) , Fri 2~2 (101)
      • Exchange students are not allowed
        • Syllabus(File)

    • Advanced Micro and Nano Systems Engineering

      • Subject No G16405Class No 01
      • Year ( 3Credit , 3Hour) Wed 5~6 (ENG A521)
        • Syllabus(File)

  • 2025-1st

    • Electromaganetics Ⅱ

      • Subject No 33752Class No 01
      • 3Year ( 3Credit , 3Hour) Mon 3~3 (ENG A) , Wed 2~2 (101)
        • 영문계획안

    • Advanced Topics in Microsensors and Actuators

      • Subject No G16643Class No 01
      • Year ( 3Credit , 3Hour) Tue 5~6 (ENG A521)
        • 영문계획안

    • Smart Factory Capstone Design

  • 2024-2nd

    • Electromagnetics Ⅰ 강의 계획서 상세보기

      • Subject No 34300Class No 01
      • 2Year ( 3Credit , 3Hour) Tue 3~3 (ENG A) , Thu 2~2 (101)
        • Syllabus(File)

    • Design and Fabrication of Micro-Electro-Mechanical Systems

      • Subject No G16631Class No 01
      • Year ( 3Credit , 3Hour) Wed 5~6 (ENG A521)
        • Syllabus(File)

    • Smart Factory Capstone Design

  • 2024-1st

    • Electromaganetics Ⅱ

      • Subject No 33752Class No 01
      • 3Year ( 3Credit , 3Hour) Wed 3~3 (ENG A) , Fri 2~2 (101)
        • Syllabus(File)

    • Advanced Micro and Nano Systems Engineering

      • Subject No G16405Class No 01
      • Year ( 3Credit , 3Hour) Wed 5~6 (ENG A521)
        • Syllabus(File)

    • Smart Factory Capstone Design

  • 2023-2nd

    • Electromagnetics I

    • Advanced topics in microsensors and actuators

      • Subject No G16643Class No 01
      • Year ( 3Credit , 3Hour) Mon 5~6 (ENG A-521)
      • Class Hour Changed
        • Syllabus(File)

    • Smart Factory Capstone Design

  • 2023-1st

    • Electromaganetics II

    • Advanced micro and nano systems engineering

      • Subject No G16405Class No 01
      • Year ( 3Credit , 3Hour) Wed 5~6 (ENG A521)
        • Syllabus(File)

    • Smart Factory Capstone Design

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Academic Background

Seoul Nat'l Univ. 공학박사(전기.컴퓨터공학)

Seoul Nat'l Univ. 공학석사(전기공학)

Seoul Nat'l Univ. 공학사(전기공학)

Work Experience

Department Chair, Department of Electronics Engineering 2015-02-01 ~ 2017-01-31

Georgia Institute of Tech., Postdoctoral fellow 2006-07-17 ~ 2011-01-21

LG전자기술원 선임 및 책임연구원 2001-10-08 ~ 2006-07-01

2013-01-01 ~ 2022-12-31

2023-01-01 ~ 2024-12-31

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