TY  - CONF
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, Paul 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  - Wennloef, Hakan Lennart Olov
TI  - The H2M Monolithic Active Pixel Sensor — characterizing non-uniform in-pixel response in a 65 nm CMOS imaging technology
JO  - Journal of Instrumentation
VL  - 20
IS  - 06
SN  - 1748-0221
CY  - London
PB  - Inst. of Physics
M1  - PUBDB-2025-00664
M1  - arXiv:2502.06573
SP  - C06037 
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 μm2, and a total active area of approximately 1.25 mm2. 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 μm 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.
T2  - Eleventh International Workshop on Semiconductor Pixel Detectors for Particles and Imaging 
CY  - 18 Nov 2024 - 22 Nov 2024, Strasbourg (France)
Y2  - 18 Nov 2024 - 22 Nov 2024
M2  - Strasbourg, France
LB  - PUB:(DE-HGF)16 ; PUB:(DE-HGF)8
DO  - DOI:10.1088/1748-0221/20/06/C06037
UR  - https://bib-pubdb1.desy.de/record/623232
ER  -