Engineer Electrical
Resume:
Woo-Hyuck Choi
University of Illinois at Urbana-Champaign, MC-712
** ***** ***** **********, **-5
Urbana, IL 61801
******@********.***
********.*.****@*****.***
JOB OBJECTIVE
To work as a Process Engineer, and practice my knowledge and past experiences.
SUMMARY
Woo-Hyuck's current research activities include electrochemical enabled MEMS-base microelectrodes of chemical and biological sensors, micro/nanofabrication such as thermal and sputtering film deposition, electroplating, photolithography, wet/dry etching, devices for in-situ monitoring of environmental and biological samples. Ultrasonically levitated droplet is investigated through optical and electrochemical detections. Previously, Woo-Hyuck worked at Semiconductor R&D Center in Samsung Electronics as a Technology Development Engineer for 3D (wafer level) 128 giga bit NAND flash memory development. Before joining Samsung Electronics, Woo-Hyuck worked at Micro and Nano Devices Center in University of Alabama in Huntsville as a research assistant for an Optical MEMS Device.
EDUCATION
Ph.D. Electrical Engineering (Fabrication), University of Cincinnati
Dissertation: Needle-type Sensor for In Situ 2D/3D Multi-Analyte Mapping (GPA:3.86)
2007-2010
M.S.E Electrical Engineering (Optics), University of Alabama-Huntsville
Thesis: Capacitive Transduction Techniques for the Liquid Crystal-Based Chemical and Biological Sensor
2003-2006
B.E. Electrical Engineering, Kyung Hee University, Korea (Military service, 3 years: 1997-1999)
1995-2002
SKILLS
Semiconductor Processes: Thin film deposition (Electroplating, Thermal/CVD), Wet/Dry Etching, Metrology (SEM, AFM, Surface profiler, Microscopic Inspection), Photolithography (Mask Design, Mask aligner), Wafer level 3D integration (SiO2 Deposition, CMP, Bonding, Cleaving)
Computational Tool: Labview, CFD-ACE, LASI (Mask design), MATLAB, Origin
PROFESSIONAL EXPERIENCE
Technology Development Engineer, Samsung Semiconductor R&D Center (2006-2007)
Project: 3D NAND Flash Memory Research and Development (32nm/128 Giga bit)
Developed process architectures of wafer bonded NAND flash memory
Inspected and analyzed the structure of NAND Flash Memory with SEM, TEM and high resolution microscope
Monitored processes using process architecture program as a Grave Yard (GY) for a week every one and half month
Analyzed electrical data of fabricated 3D NAND flash memory
Accomplished over 90 % yield rate for 3D SRAM project using wafer bonding technology
Confirmed wafer bonding material for 1st tier
Developed process for 2nd tier laser annealing of 3D NAND flash memory
Presented Wafer Bonding Technology to 20 collaborated teams in two weeks
Be trained Six Sigma for green belt
Awarded the best project team from Samsung entry level training as a team leader
RESEARCH EXPERIENCE
Postdoctoral Research Associate, University of Illinois at Urbana-Champaign (2011-present)
Developing electrochemical monitoring for levitated droplet using ultrasonic waves
Re-design the Electrochemical sensor structure to improve sensor signals
Investigating the biological activities of molecules in the micro-liter volume droplet
Building H/W of automated temperature and humidity control system and S/W (Labview)
Simplifying procedure and building batch processes for a glass substrate
Reducing defects by changing the substrate material
Developing double metal layer masks for HF-based glass wafer etching
Mentored and supervised undergraduate research assistants
Research Assistant, University of Cincinnati (2007-2010)
Developed fabrication of PR-buffered vertical RIE etching techniques
Developed electroplating processes for IrOx and Co films
Built a portable measurement setup using Labview signal conditioning system
Characterized electrical properties and analyzed data of electrochemical sensors
Microprofiling of biofilm in waste water treatment system and around near plant root
Improved yield ratio from 5% to 80% by re-design process architecture
Mentored and supervised undergraduate students for the senior projects
Research Assistant, University of Alabama-Huntsville (2003-2006)
Built numerical modeling and performed analysis for electromagnetic wave of the inter-digitated capacitors using MATLAB
Developed process architectures of Liquid Crystal (LC)-based device
Investigated capacitive transduction techniques for the liquid crystal-based sensor for chemical and biological element detection
Analyze electrical characteristic of device
Reduced defects from 20 short per device to 0 short
TEACHING EXPERIENCE
Teaching Assistant, University of Cincinnati (2008)
Graded students’ homework and exams for Microelectronics and DSP
Tutored and provided students with individualized attention regarding the course materials
Mathematics and English Tutor (1995-2003)
Taught Geometry, Algebra, Calculus, English to high school students
PUBLICATIONS
Woo-Hyuck Choi, Woohyoung Lee and Ian Papautsky, “Fabrication of Needle-type PH and Phosphate Sensor,” Journal of Micro/Nanolithography, MEMS, and MOEMS.(In Press)
Woohyoung Lee, Jin-Hwan Lee, Woo-Hyuck Choi, Ahmed Hosni, Ian Papautsky, Paul L. Bishop, “Environmental micro-sensor design, construction and use: microelectrodes and multi-analyte MEMS sensor arrays,” Meas. Sci. and Technol. , vol. 7, no. 12, 2011.
Woo-Hyuck Choi, Jodi R. Shann, and Ian Papautsky, “Multi-analyte Needle-type Sensor for Measurement of PH, Phosphate, and Redox Potential in soil,” in Proc. IEEE Conf. Sensors, Hawaii, USA, November 1-4, 2010. (the best paper at IEEE Sensors 2010 in Hawaii)
Woo-Hyuck Choi, Woohyoung Lee, Paul L Bishop, and Ian Papautsky, “Integrated Dissolved Oxygen-Compensated Needle-type Sensor for Phosphate Analysis of Biological and Environmental Samples,” in Proc. µTAS, Jeju, Korea, November 1-5, 2009.
Woo-Hyuck Choi and Ian Papautsky, “PH Compensated Needle Type Sensor for Dissolved Oxygen and Phosphate Analysis of Biological and Environmental Samples;” in Proc. UKC(United State Korea Conference), North Carolina, USA, July 16-20, 2009.
A.Abu-Abed, Robert Lindquist, and Woo-Hyuck Choi, “Capacitive Transduction for Liquid Crystal-Based Sensors, Part I: Ordered System,” IEEE Sensors, vol. 7, no. 12, 2007.
R. G. Lindquist, A. Abu-Abed, and Woo-Hyuck Choi, “Liquid Crystal Sensors with Capacitive Transduction,” in Proc. IEEE Conf. Sensors, Daegu, Korea, October 22-25, 2006, pp. 1341–1344.
AWARDS & HONORS
University Graduate Scholarship at UC, 2007-2010 (full academic years)
University Graduate Research Fellowship (by University Research Council) at UC, 2009
Institute for Nanoscale Science and Technology Grant at UC, 2007& 2009
Academic Scholarship at Kyung Hee University, 2001
PROFESSIONAL MEMBERSHIPS
Institute of Electrical and Electronics Engineers (IEEE)
Korean-American Scientists and Engineers Association (KSEA)
American Physical Society (APS)
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