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Education
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B.S. Mechanical Engineering, National Taiwan University, 2000-2004
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M.S.
Electrical Engineering, National Taiwan University, 2004-2006
- Ph.D. Electrical Engineering, California Institute of Technology, 2008-2013 (expected)
Research
Parylene Interface Packaging for retinal implant
- Multi-Channel Chip Connection Technology
- Develop the novel parylene interface technology that can align with IC chips and discrete components and provide electrical connection to them.
- Utilize squeegee technique to attain high-density channel connection, SU8 layer to solve the unfilled conductive epoxy problems, and laser to fix the shortage issues.
- Chip Pattern Technique
- Greatly enhance adhesion area from 2% to 94% and cover the unnecessary pads to avoid shortage happening underneath during squeegee as well to increase connection yield.
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- Dry Mechanical Liftoff Technology
- Apply SU-8 as a sacrificial mask to directly pattern metals on parylene-C film.
Adhesion-Enhancement Treatment for Parylene Deposition
- Use physical and chemical treatments to enhance the adhesion for parylene and quantify the effectiveness by peeling force, soaking undercut rate, and vertical attack bubble density.
Publications
Conference
- Jay Han-Chieh Chang, Ray Huang, Yu-Chong Tai, (2011), "High-Density IC Chip Integration with Parylene Pocket," NEMS ’11, Kaohsiung, Taiwan.
- Jay Han-Chieh Chang, Ray Huang, Yu-Chong Tai, (2011), "High-Density 256-Channel Chip Integration with Flexible Parylene Pocket," Transducer ’11, Beijing, China, June 5-9, 2011
- Jay Han-Chieh Chang, Bo Lu, Yu-Chong Tai, (2011), "Adhesion-Enhancement Surface Treatment for Parylene Deposition," Transducer ’11, Beijing, China, June 5-9, 2011
- Bo Lu, Jay Han-Chieh Chang, Yu-Chong Tai, (2011), "Time-dependent cell membrane damage under mechanical tension: experiments and modeling," Transducers 2011, Beijing, China, June 5-9, 2011.
- Jay Han-Chieh Chang, Dongyang Kang, Yu-Chong Tai, (2012), "HIGH YIELD PACKAGING FOR HIGH-DENSITY MULTI-CHANNEL CHIP INTEGRATION ON FLEXIBLE PARYLENE SUBSTRATE," MEMS ’12, Paris, France, January 29-February 2, 2012
- Jay Han-Chieh Chang, Dongyang Kang, Yu-Chong Tai, (2012), "Dry Mechanical Liftoff Technology for Metallization on Parylene-C Film using SU-8," NEMS ’12, Kyoto, Japan, March 5-8, 2012
- Dongyang Kang, Jay Han-Chieh Chang, Young-Hyun Kim, Yu-Chong Tai, (2012), "In Situ Heating to Improve Adhesion for Parylene-on-Parylene Deposition," NEMS ’12, Kyoto, Japan, March 5-8, 2012
Journal
Activities and Experience
- President of Association of Caltech Taiwanese (ACT), 2009-2010
- Manager of ACT softball team, 2010-2011
Current Research
(a) Schematic representation of the fabricated monolithic surgical device connected with the chip and ASICs. Multi-electrode array will be connected with optic nerves and fixed by retinal tack (d); integrated ASICs will be placed on eyeball. (b) Backside of the ASICs area. (c) A close-up view of the chip integration.
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