Fraunhofer has thoroughly investigated and developed a unique laser bonding process for joining of dissimilar materials. Biocompatible polymers such as polyurethane or polymide can be laser bonded to titanium or stainless steel. Laser heating has high spatial and temporal control to maintain the critical specific bonding temperature required to establish chemical bonds between the materials and to avoid degradation of the polymers.
In cooperation with Wayne State University in Detroit, joint characteristics such as strength, hermeticity, bio-compatibility and long-term joint degradation in bodily fluid conditions for implant applications were successfully tested.
- Bonding of dissimilar materials
- Localized joining for heat sensitive components
- Hermetic sealing of joints
- Bio-compatible joints
- Very small joint widths (<0.2 mm) possible