In the contour welding process, the lid is welded to a package. Both parts appear blue to the human eye. The lid however is rendered transparent for the IR laser beam, whereas the package absorbs the laser beam.
Sensitive electronic components are also found in sport. The Foot Pad is used in the context of endurance training. This is equipped with GPS and allows data to be transferred to a receiver, such as a watch. In this way, users can record their running times and distances, and display this data using a computer. As the Foot Pad is used outdoors, it has to be completely sealed from the environment.