The exploitation of the physics reach at the next generation electron-positron colliders requires outstanding flavour tagging performance, impacting on the vertex detector characteristics:
- state-of-the-art granularity for resolutions at the few micron level shall be guaranteed while preserving a high event rate capability;
- minimum multiple scattering at the innermost radius calls for a material budget at the level of 0.15% X0 per layer;
- “compact” detectors requires advanced integration and packaging technologies, innovative cooling and assembly solutions.
Monolithic active pixel silicon detectors will expectedly play a major role. At the moment, no architecture nor technology exists fulfilling all of the requirements. However, several solutions are being explored, capitalizing on the experience of the first large area, high performance vertex detectors under construction or commissioning.
The talk will discuss possible options on silicon sensors and associated electronics for future vertex detectors, with a view on the use of this technology also for large area trackers. As exemplary illustration, I will present the status and outlook of the INFN project on the design of fully-depleted CMOS monolithic sensors.