TY  - EJOUR
AU  - Ruiz Daza, Sara
AU  - Ballabriga, Rafael
AU  - Buschmann, Eric
AU  - Campbell, Michael
AU  - Mohr, Raimon Casanova
AU  - Dannheim, Dominik
AU  - Dilg, Jona
AU  - Dorda, Ana
AU  - King, Finn
AU  - Feyens, Ono
AU  - Gadow, Philipp
AU  - Gregor, Ingrid-Maria
AU  - Hansen, Karsten
AU  - He, Yajun
AU  - Huth, Lennart
AU  - Kremastiotis, Iraklis
AU  - Lemoine, Corentin
AU  - Maffessanti, Stefano
AU  - Mendes, Larissa
AU  - Otarid, Younes
AU  - Reckleben, Christian
AU  - Rettie, Sébastien
AU  - Viera, Manuel Alejandro del Rio
AU  - Schlaadt, Judith
AU  - Simancas, Adriana
AU  - Snoeys, Walter
AU  - Spannagel, Simon
AU  - Vanat, Tomas
AU  - Velyka, Anastasiia
AU  - Vignola, Gianpiero
AU  - Wennlöf, Håkan
TI  - The H2M Monolithic Active Pixel Sensor - characterizing non-uniform in-pixel response in a 65 nm CMOS imaging technology
IS  - arXiv:2502.06573
M1  - PUBDB-2025-02221
M1  - arXiv:2502.06573
PY  - 2025
AB  - The high energy physics community recently gained access to the TPSCo 65 nm ISC (Image Sensor CMOS), which enables a higher in-pixel logic density in monolithic active pixel sensors (MAPS) compared to processes with larger feature sizes. To explore this novel technology, the Hybrid-to-Monolithic (H2M) test chip has been designed and manufactured. The design followed a digital-on-top design workflow and ports a hybrid pixel-detector architecture, with digital pulse processing in each pixel, into a monolithic chip. The chip matrix consists of 64×16 square pixels with a size of 35×35 um2, and a total active area of approximately 1.25 um2. The chip has been successfully integrated into the Caribou DAQ system. It is fully functional, and the measured threshold dispersion and noise agree with the expectation from front-end simulations. However, a non-uniform in-pixel response related to the size and location of the n-wells in the analog circuitry has been observed in test beam measurements and will be discussed in this contribution. This asymmetry in the pixel response, enhanced by the 35 um pixel pitch - larger than in other prototypes - and certain features of the readout circuit, has not been observed in prototypes with smaller pixel pitches in this technology.
LB  - PUB:(DE-HGF)25
DO  - DOI:10.3204/PUBDB-2025-02221
UR  - https://bib-pubdb1.desy.de/record/632796
ER  -