Chaojun Cheng, Ph.D.

Senior Research And Development Engineer at MicroPort Endovastec
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Contact Information
us****@****om
(386) 825-5501
Location
Irvine, California, United States, US
Languages
  • English Full professional proficiency
  • Chinese Native or bilingual proficiency

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Experience

    • China
    • Medical Equipment Manufacturing
    • 1 - 100 Employee
    • Senior Research And Development Engineer
      • Jul 2023 - Present

    • United States
    • Hospitals and Health Care
    • 700 & Above Employee
    • Postdoctoral Fellow
      • Aug 2022 - Jun 2023

      Project: A cuff lead used to deliver drug or electrical stimuli to sciatic nerve. This cuff lead contains a self-curling head, fluid channels, catheter adaptor, suture holes, and catheters that lead to external electronic device. • Design, fabricate, and test the cuff lead. • Developed a parallel fabrication method which reduced fabrication duration by 95%. • Select bio-compatible materials (silicone rubber and plastic) for each component. • Assess the impact of design and material changes over fabrication and performance. • Improved reliability by replacing brittle agar gel with rubbery crosslinked sodium alginate. • Draft fabrication and implantation protocols and teach external collaborators. • Work with electrical engineer and veterinary surgeon to collect feedbacks and improve design. Show less

    • United States
    • Higher Education
    • 700 & Above Employee
    • Research Assistant
      • Jan 2017 - Aug 2022

      Project: In this lab, we are developing a novel neural implant that can safely deliver direct current (DC) to suppress neural activities.• Designed a microfluidic valve electrically actuated with Nitinol wire which consumes 50% less energy and provides 25x contrast ratio of valve’s impedance.• Designed an ionic transistor as a non-mechanical control of ion concentration in microfluidics which improves reliability by eliminating moving part in device.• Designed an ionic current sensor which enables accurate long-term measurement (<2% error) of electrical current in a complex microfluidic channel network.• Designed a microfluidic chip with embedded microvalves and sensor which was the first working prototype of the safe DC neural stimulator.• Developed an in vivo rat model which requires 90% less electrical current to test the neural stimulator. Show less

    • Teaching Assistant
      • Aug 2019 - Jun 2020

      Course: Neural Implants and Interfaces.Duties: Grading, organizing TA sessions, lecturing, and providing MATLAB help to students.

  • Wenzhou city gas
    • Wenzhou, Zhejiang, China
    • Quality Control and Safety Engineer
      • May 2010 - Dec 2013

      Natural Gas Construction Office, Technology and Safety Control Department. • Selected equipment and material from external vendors for construction work. • Quality and safety control of pipeline construction. • Trained new employees about the quality and safety standards in gas pipeline. Natural Gas Construction Office, Technology and Safety Control Department. • Selected equipment and material from external vendors for construction work. • Quality and safety control of pipeline construction. • Trained new employees about the quality and safety standards in gas pipeline.

Education

  • The Johns Hopkins University
    Doctor of Philosophy - PhD, Mechanical Engineering
    2017 - 2022
  • Columbia University in the City of New York
    Master of Science - MS, Mechanical Engineering
    2013 - 2015
  • Chongqing University
    Bachelor of Engineering - BE, Heating, Ventilation, Air Conditioning and Refrigeration Engineering Technology/Technician
    2006 - 2010

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