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RESEARCH CREDENTIALS OF JASON CHEN FANG HAO
Dear visitor,
Research has always been the thing I want to do in life. I got a research scholarship from NUS to do a FULL TIME MASTERS degree in research. Basically, my MASTERS research is a continuation from my FINAL YEAR PROJECT. Due to some financial constraints and other personal matters, I was unable to continue to do my pHD from Masters immediately but I will do it probably after 2 years. I hope some day, I can do research somehow and somewhere...I hope you will know more about me through this webpage.
ACADEMIC QUALIFICATIONS:
BACHELOR OF ENGINEERING (ELECTRICAL) 2ND CLASS HONOURS WITH A MINOR IN MANAGEMENT OF INFORMATION SYSTEMS - NATIONAL UNIVERSITY OF SINGAPORE (1996-2000)
MASTERS OF ENGINEERING- NATIONAL UNIVERSITY OF SINGAPORE (2000-2002)
PROFESSIONAL MEMBERSHIPS
IEEE, member (pending)
ISML ALUMNI, member
NATIONAL UNIVERSITY OF SINGAPORE ALUMNI, member
RESEARCH LABORATORIES
INFORMATION STORAGE MATERIALS LABORATORY (ISML) is where I received my research training and exposure. It is funded by TEMASEK LABORATORIES and NATIONAL UNIVERSITY OF SINGAPORE DEPARTMENT OF ELECTRICAL ENGINEERING . ISML houses a NANOTECHNOLOGY FACILITY (NTF), a facility room containing characterization equipment, a research scholars' corner and a general office for lab technicians and engineers.
NTF is a large class 1000 cleanroom that houses state-of-the art nanotechnology equipment such as 10-targets sputtering machine, MBE (molecular beam epitaxy), photolithography machine, thermal evaporator, electron beam photolithography (housed in a special cleanroom of class 100). NTF is co-managed by ISML and Silicon Nano Devices Laboratory.
Characterization equipment includes AFM, SEM , wirebonder, VSM and cryostat.
ISML has many links with international well known laboratories such as DSI (Data Storage Institute, Singapore), and Cambridge University,.
RESEARCH INTERESTS and PROJECTS
My research interests includes magnetic tunnel junctions (MTJs) and exchange biasing.
During my final year undergraduate days, my research was determining the optimum oxidation conditions via reactive etching method for MTJs. These MTJs comprise of permalloy (NiFe) and cobalt (Co) as the magnetic electrodes and aluminium oxide as the tunneling barrier of about 10 to 20 angstroms. Photolithography techniques were employed to pattern the MTJs devices at submicron level, Sputtering and Evaporation deposition techniques were used to manufactured the MTJs.
At Masters Level, my research focuses on the usage of exchange biasing to stabilize and enhance the performance of MTJs. Exchange field using antiferromagnetic material such as FeMn was used as the pinning layer for the MTJs. Ways to enhance the exchange field in the MTJs were investigated to see if they are suitable for MTJs. Techniques such as in-situ magnetic field deposition, post deposition magnetic annealing were researched to see if they have any enhancement effects on the MTJs and.or detrimental effects on the performance of the MTJs devices. In this projects, I have learned to create, design and manufacture a magnetic annealing chamber (mini) for the thin films.
Shadow mask techniques were employed to fabricate the exchange biased MTJs and non-exchange biased MTJs for comparison.
Future research plans include doing simulation for exchange biased effects on MTJs, utilizing other antiferromagnetic materials for pinning and seed layer.
RESEARCH SUPERVISORS
I have the privilege of working under:
1) Asst Professor Vivian Ng (ISML principal investigator; professor in NUS ECE Dept)
2) Asst Professor Adeyeye Kunle (ISML principal investigator; professor in NUS ECE Dept)
3) A/Prof Wang Jian Ping (Ex-DSI Group Manager; professor in University of Minnesota)
4) Prof Bhatia Singh( Temasek Professor; IBM Research professor in USA)
RESEARCH PUBLICATIONS
1) “Effects of in-situ magnet application and post deposition magnetic annealing on sputtered Fe50Mn50/ Ni80Fe20” , V. Ng, F.H. Chen and A.O.Adeyeye, Journal of Magnetism and Magnetics Materials, Vol. 260, Issue 1-2, p52-58, (2003).
2) “Effects of in-situ magnet application and post deposition magnetic annealing on sputtered Ni80Fe20/ Fe50Mn50/Ni80Fe20 trilayers”, F.H. Chen, V. Ng and A.O. Adeyeye, Journal of Applied Physics (special edition for 47th annual conference on magnetism and magnetics materials), Vol. 93, No. 10, p.6605-6607, (2003).
3) “Effects of temperature, in-situ magnetic field deposition and post deposition magnetic annealing on Ni80Fe20/Fe50Mn50/Ni80Fe20/Al2O3/Co and Ni80Fe20/Al2O3/Co magnetic tunnel junctions”, F.H. Chen and V. Ng, IEEE Transaction on Magnetics, Vol.41, No.1, (Jan 2005).
4) Masters of Engineering Thesis on “Effects of in-situ magnet application and post deposition magnetic annealing on exchange biased structures and magnetic tunnel junctions”, National University of Singapore, 2002/2003.
5) Bachelor of Engineering Thesis on “Fabrication and Measurements of magnetic tunnel junctions”, National University of Singapore, 2000.
CONFERENCES ATTENDED
1) INTERNATIONAL CONFERENCE ON MATERIALS (ICMAT) , 2001 (Singapore)
2) 47th CONFERENCE ON MAGNETICS AND MAGNETICS MATERIALS, 2002 (Florida, USA)
RESEARCH TRAININGS
I was trained to use the following equipments:
1) Multitargets sputtering machines-DC and RF power
2) Thermal Evaporator
3) Optical Photolithography technique and machine
4) VSM
5) Atomic Force Microscopy
6) Scanning Electron Microscopy
7) X-Ray Diffraction Machine
8) Cryostat
9) WireBonder
I have also fabricated a Mini MAGNETIC ANNEALER from scratch.
I am familiar with the design of masks for shadow mask and optical lithography techniques
I am familiar with simple simulation software
RESEARCH RELATED JOBS
Beside research, I was a graduate tutor and Lab demonstrator with the Department of Electrical Engineering.
I taught 2nd year undergraduates modules such as Engineering Maths 2, Electronics 2 and conducted 2nd year experiments.
RELATED MODULES I STUDIED
FUNDAMENTALS OF SEMICONDUCTOR PROCESSES- MASTERS LEVEL
MAGNETIC RECORDING- MASTERS LEVEL
MAGNETIC MEDIA TECHNOLOGY- FINAL YEAR
MAGNETIC RECORDING SYSTEM - FINAL YEAR<
SILICON DEVICE PROCESSING-3rd YEAR
QUANTUM MECHANICS 2 -CROSS FACULTY (PHYSICS MODULE)
Updated 06/01/2005
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