DCB (Direct Copper Bondings) substrates are components for electronic circuits and systems which must be connected with each other in function via contact surfaces. Their specific design (ceramics coated with copper) makes the contact very sensitive as the coating may not delaminate due to thermal load nor may the ceramic itself be damaged. Using the green laser wavelength and the corresponding higher absorption rate in copper, long-lasting electric contacts can be created on the sensitive substrate. The DCB substrate remains completely intact.

TRUMPF lasers facilitate the very compact design of modern electronic power and control units. Using the laser precision tool, the internal contacts can be safely welded in a robust plastic housing with one-sided access in a final joining step. Alternative methods such as soldering, spot welding or connectors require a great deal more space for seam points. The laser also makes the most varied types of contactings possible - virtually spatter-free and with no adverse effect on adjacent sensitive components in very confined spaces.

In comparison to screw connections, laser welding external connecting contacts facilitates a much more compact installation of IGBT boards into their surroundings, for example in electric cars. However, it must be ensured when welding these contacting connections that the generated heat input which is sometimes fed into the component's interior, is kept to a minimum. This means that the sensitive electronics are not damaged. This is made possible by the high welding speeds (reduction of distance energy) in combination with the TRUMPF BrightLine Weld technology, which effectively avoids spatter, protecting the component from contamination.