Power distribution over the wafer-scale monolithic pixel detector — MOSAIX for ALICE ITS3

• Published in: Journal of instrumentation Vol. 20; no. 2; p. C02015
• Main Authors: Aglieri Rinella, G., Bugiel, S., Dobrijevic, D., Lemoine, C., Snoeys, W., Vicente Leitao, P.
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.02.2025
• Subjects: Data transfer (computers); Large detector systems for particle and astroparticle physics; Network design; Particle tracking detectors (Solid-state detectors); Very low-energy charged particle detectors; Voltage distributions
• ISSN: 1748-0221
• DOI: 10.1088/1748-0221/20/02/C02015

For the LS3 ALICE ITS3 upgrade the detector material budget reduction has been pushed to the limit by proposing a system composed almost exclusively of silicon wafer thinned down to 50μm. This improves performance, but adds complexity to the ASIC design. It requires a wafer-scale module with embedded power delivery network and on-chip data transfer, which were usually done through flexible printed circuit cable.This contribution covers different aspects of the power delivery network design for a wafer-scale detector. It describes the difficulties, shows possible solutions and presents the power scheme design of the full-size ITS3 sensor prototype MOSAIX.