Perfect Welds (IMAGE) Fraunhofer-Gesellschaft Caption In the new surface welding process the laser produces a perfect seam. Bottom left: Weld seam profile -- the penetration depth is controlled without damaging the bottom surface. Credit Fraunhofer IPM Usage Restrictions The picture may be used for editorial purposes only. It is protected by copyright. The use is free of charge if the reference is mentioned. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.