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Laser Fabrication and Characterization of Adhesive-Free Joints for Encapsulation of Biomedical Implant Devices
WAYNE STATE UNIV DETROIT MI COLL OF ENGINEERING
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Laser-fabricated joints of sub-millimeter widths between biocompatible, dissimilar materials have the potential for applications as encapsulation of miniature implant biomedical devices. In this work, we briefly describe the laser joining method of a very promising system, polyimidetitanium-coated borosilicate glass, and present and discuss results from characterization of such laser joints by means of mechanical failure tensile tests, optical microscopy, X-ray photoelectron spectroscopy XPS and raman spectroscopy. Our results suggest the formation of strong chemical bonds between Ti-containing species and certain polymeric functional groups. Mechanical tensile strength failure test showed that such joint experience only limited, disappearing with time degradation as a result of soaking in physiological solutions.
APPROVED FOR PUBLIC RELEASE