The research objectives of the network project are the development of germanium (Ge) detectors of unprecedented qualities for multi-detector arrays and for the European spectroscopy community as a whole to proceed to new frontiers in the eld of nuclear structure physics by means of high-precision spectroscopy experiments. The investigation of new phenomena in atomic nuclei requires the study of their structure under extreme conditions at the boundary of stability, where the excitation energy, the spin or the ratio of protons and neutrons (isospin) take extreme values. The most powerful means to study nuclear structure under extreme conditions is the high-precision spectroscopy. Many interesting research topics, especially the investigation of the isospin degree of freedom requires the use of highly eÆcient and highly granulated arrays. The prerequisite for the construction of such arrays is the development of tracking detectors. They consist of high-fold segmented Ge detectors and front-end electronics, based on new digital signal processing techniques, which allow to extract energy, timing and spatial information for a by pulse shape analysis of the Ge detector signals. Utilizing the segmentation and the pulse shape analysis, the track of a in a Ge detector can be reconstructed in three dimensions.