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The time and efficiency of charge collection are the key factors of monolithic active pixel sensor devices for minimum ionizing particles tracking detection.In this paper,3D models of pixels with different resistivity epitaxial layers(epi-layers) are built and simulated using Synopsys-Sentaurus.The basic characteristics of detectors are evaluated,including electric potential,electric field,and depleted region.Results indicate that the high resistivity (HR) epi-layer is a better choice.Further,simulation results show that the key collection performance is significantly improved owing to a wider and stronger electric field in the N type HR epi-layer.
The time and efficiency of charge collection are the key factors of monolithic active pixel sensor devices for minimum ionizing particles tracking detection. In this paper, 3D models of pixels with different resistivity epitaxial layers (epi-layers) are built and simulated using Synopsys-Sentaurus . The basic characteristics of detectors are evaluated, including electric potential, electric field, and depleted region. Results indicate that the high resistivity (HR) epi-layer is a better choice. Future, simulation results show that the key collection performance is significantly improved due to a wider and stronger electric field in the N type HR epi-layer.