Development and test of micro-cables for thin silicon detector modules in a prostate probe

Recent progress in the development of micro-cables for very densely packed silicon pad detector modules to be used in a Compton Prostate Probe is reported. The purpose of this development is to optimize the packaging and interconnection of 1mm thick silicon sensors with their readout electronics in such a way that the assembly thickness is dominated by the sensor thickness. The sensor-chip interconnections are based on aluminum polyimide micro-cables. Development of micro-cables demonstrate that TAB technology can replace wire bonding technology, which does not allow optimally dense packaging, with TAB bonded modules which have electronically equally good performance. That gives us a motivation for the development of a detector-cable and chipcable assembly TABed to a very thin PCB module by a two layer detector cable achieving a total height of only 1.2mm.