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Integrated LTCC packaging for use in biomedical devices.

Arthur L Chlebowski1, Eric Y Chow, Casey Ellison

  • 1Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA. achlebow@purdue.edu

Bio-Medical Materials and Engineering
|November 2, 2012
PubMed
Summary

Low temperature co-fired ceramics (LTCC) offer biocompatible and radio-transparent packaging for implantable devices. Integrating inductor coils into LTCC packaging enhances wireless power and telemetry for miniaturized medical implants.

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Electrical Engineering

Background:

  • Increasing use of implantable devices necessitates advanced materials for enhanced functionality and miniaturization.
  • Biocompatibility and radio transparency are critical requirements for implantable device packaging to enable wireless communication and power.
  • Existing materials often present limitations in meeting these combined requirements.

Purpose of the Study:

  • To investigate the use of Low Temperature Co-fired Ceramics (LTCC) as a novel packaging material for implantable devices.
  • To integrate inductor coils for wireless telemetry and powering directly into the LTCC package walls.
  • To optimize the miniaturization of implantable devices while maximizing passive component size and performance.

Main Methods:

  • Fabrication of an LTCC-based package incorporating integrated inductor coils.
  • Characterization of the fabricated inductors for inductance and quality factor at specific frequencies.
  • Performance comparison using a power-link figure of merit against existing literature devices.

Main Results:

  • Successfully designed and fabricated LTCC packages with integrated inductors.
  • Achieved inductors with approximately 20 mH inductance and a quality factor of 7.8 at 2 MHz.
  • Demonstrated superior performance compared to similar devices in the literature based on the power-link figure of merit.

Conclusions:

  • LTCC is a viable material for implantable device packaging, offering biocompatibility and radio transparency.
  • Integrating inductor coils within LTCC packaging is an effective strategy for miniaturization and enhanced wireless capabilities.
  • The developed LTCC-based inductors show promising performance for wireless telemetry and remote powering in medical implants.