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Laser fabrication and characterization of adhesive-free joints for encapsulation of biomedical implant devices

: Newaz, G.; Georgiev, D.G.; Mian, A.; Auner, G.; Herfurth, H.; Witte, R.

Laurencin, C.T. ; Materials Research Society -MRS-:
Nanoscale materials science in biology and medicine : Symposium held November 28 - December 2, 2004, Boston, Massachusetts, U.S.A.
Warrendale, Pa.: MRS, 2005 (Materials Research Society Symposium Proceedings 845)
ISBN: 1-558-99793-8
ISSN: 0272-9172
Symposium AA "Nanoscale Materials Science in Biology and Medicine" <2004, Boston/Mass.>
Materials Research Society (Fall Meeting) <2004, Boston/Mass.>
Conference Paper
Fraunhofer ILT ()

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, polyimide/titanium-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.