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Published on: September 27, 2018
Micro package of short term wireless implantable microfabricated systems
Leping Bu1, Peng Cong, Hung-I Kuo
1Case Western Reserve University, Cleveland OH 44106, USA. fw680@hotmail.com
Summary
This study developed micro-packaging for short-term implantable biomedical systems. Thin, multi-layer coatings ensure tissue compatibility and device longevity for over 30 days.
Area of Science:
- Biomedical Engineering
- Materials Science
- Microelectromechanical Systems (MEMS)
Background:
- Biomedical implantable systems require robust packaging to ensure biocompatibility and longevity within the host body.
- Microfabricated systems with wireless capabilities present unique packaging challenges, demanding thin, reliable encapsulation.
Purpose of the Study:
- To investigate and develop micro-packaging techniques for short-term (30-90 days) implantable biomedical systems.
- To evaluate the performance and reliability of novel packaging materials and methods for wireless MEMS devices.
Main Methods:
- Designed and fabricated a MEMS implantable telemetry model system for packaging evaluation.
- Utilized medical-grade silicone for outer coating and multilayer polymeric/nanometer-thin films for inner coatings.
- Evaluated electrical performance (leakage resistance) in 40°C saline and analyzed coating failure modes.
Main Results:
- Developed a packaging solution with a total coating thickness under 0.6 mm.
- Identified and addressed failure modes of polymeric coatings, proposing improved techniques.
- Verified the expected performance of the developed multi-layer packaging method through experimental testing.
Conclusions:
- Thin, multi-layer packaging materials are effective for short-term implantable wireless MEMS systems.
- The developed packaging method ensures an expected device lifetime exceeding 30 days in physiological conditions.
