The new high precision laser welding system LPKF PrecisionWeld 3000 allows new layout options for microfluidic components. It creates a precise joint between upper and lower part. These fine weld seams have a width of only 100 µm. The positioning repeatability of 30 µm is highlighted by the name of the system. The LPKF Precision Weld surpasses existing technologies like transmission laser welding (contour- and quasisimultaneous welding) with the addition of the new clear-clear method LPKF ClearJoining. Clear-Clear welding of two laser transparent partners without additives.