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Two different depleted monolithic cmos sensors with active pixels ( dmaps ) were used and tested prototypes that have a fully synchronous column-drain readout architecture: lf-monopix and tj-monopix. These chips are a segment of research papers on a suitable implementation of cmos dmaps for the internal tracker hl-lhc atlas. Lf-monopix was built using a 150nm cmos process on a canvas with excellent resistance (> 2 kω cm), while tj-monopix was developed using a modified 180 nm cmos process with a 1 kω cm epi layer for exhaustion. The chips differ in the design of the external interface, the bias circuit, the pixel pitch, the dimensions of the collecting electrode in terms of the pixel size (the design of the large and small electrodes and the placement of the readout electronics inside such an electrode. Both chips were operational after thinning to full micron and concomitant processing of the second side in lf-monopix for full volume depletion.The results of such activities include measurements of their leakage current, noise, threshold dispersion, response to minor ionizing particles and efficiencies in test beam campaigns.In addition, the results of measurements after neutron irradiation with a dose of up to one × 1015 neq are discussed. /Cm2 and phone troubles for tomorrow's developments.

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