Improved radiation tolerance of MAPS using a depleted epitaxial layer

Tracking performance of Monolithic Active Pixel Sensors (MAPS) developed at IPHC (Turchetta, et al., 2001) [1] have been extensively studied (Winter, et al., 2001; Gornushkin, et al., 2002) [2], [3]. Numerous sensor prototypes, called MIMOSA,11Standing for Minimum Ionising particle MOS Active pixel sensors. were fabricated and tested since 1999 in order to optimise the charge collection efficiency and power dissipation, to minimise the noise and to increase the readout speed.