Time performance of Analog Pixel Test Structures with in-chip operational amplifier implemented in 65 nm CMOS imaging process
Abstract
In the context of the CERN EP R&D on monolithic sensors and the ALICE ITS3 upgrade, the Tower Partners Semiconductor Co (TPSCo) 65 nm process has been qualified for use in high energy physics, and adopted for the ALICE ITS3 upgrade. An Analog Pixel Test Structure (APTS) featuring fast per pixel operational-amplifier-based buffering for a small matrix of four by four pixels, with a sensor with a small collection electrode and a very non-uniform electric field, was designed to allow detailed characterization of the pixel performance in this technology. Several variants of this chip with different pixel designs have been characterized with a (120 GeV/) positive hadron beam. This result indicates that the APTS-OA prototype variants with the best performance achieve a time resolution of 63 ps with a detection efficiency exceeding 99% and a spatial resolution of 2 m, highlighting the potential of TPSCo 65nm CMOS imaging technology for high-energy physics and other fields requiring precise time measurement, high detection efficiency, and excellent spatial resolution.
Cite
@article{arxiv.2407.18528,
title = {Time performance of Analog Pixel Test Structures with in-chip operational amplifier implemented in 65 nm CMOS imaging process},
author = {Gianluca Aglieri Rinella and Luca Aglietta and Matias Antonelli and Francesco Barile and Franco Benotto and Stefania Maria Beolè and Elena Botta and Giuseppe Eugenio Bruno and Francesca Carnesecchi and Domenico Colella and Angelo Colelli and Giacomo Contin and Giuseppe De Robertis and Florina Dumitrache and Domenico Elia and Chiara Ferrero and Martin Fransen and Alex Kluge and Shyam Kumar and Corentin Lemoine and Francesco Licciulli and Bong-Hwi Lim and Flavio Loddo and Magnus Mager and Davide Marras and Paolo Martinengo and Cosimo Pastore and Rajendra Nath Patra and Stefania Perciballi and Francesco Piro and Francesco Prino and Luciano Ramello and Arianna Grisel Torres Ramos and Felix Reidt and Roberto Russo and Valerio Sarritzu and Umberto Savino and David Schledewitz and Mariia Selina and Serhiy Senyukov and Mario Sitta and Walter Snoeys and Jory Sonneveld and Miljenko Suljic and Triloki Triloki and Andrea Turcato},
journal= {arXiv preprint arXiv:2407.18528},
year = {2025}
}