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CMOS monolithic active pixel sensors for minimum ionizing particle tracking using non-epitaxial silicon substrate

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15 Author(s)
Dulinski, W. ; Lab. d''Electronique et de Phys. des Systemes Instrumentaux, Strasbourg, France ; Berst, J.-D. ; Besson, A. ; Claus, G.
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Nonepitaxial, high resistivity silicon has been used as a substrate for implementation of CMOS monolithic active pixel sensors (MAPS) designed for high precision minimum ionizing particle tracking. The readout electronics circuitry is integrated directly on top of such a substrate using a standard commercial CMOS process. In this paper, measurements of these devices using a high-energy particle beam are presented. Efficient and performing MIP tracking is demonstrated for both small (20 μm) and large (40 μm) pixel readout pitch. Radiation hardness that satisfies many future particle physics applications is also proven. These results show that the use of epitaxial substrate for MAPS fabrication is not mandatory, opening a much larger choice of possible CMOS processes in the future.

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Nuclear Science, IEEE Transactions on  (Volume:51 ,  Issue: 4 )