Design, production, burn-in and tests of the hybrid circuits of the Upstream Tracker at the LHCb detector

TL;DR

This paper details the design, production, and testing of hybrid circuits for the Upstream Tracker at LHCb, focusing on optimizing electrical performance and radiation hardness for high-energy physics experiments.

Contribution

It introduces a novel design and production process for radiation-hard hybrid circuits tailored for the LHCb detector's front-end electronics.

Findings

Successfully designed hybrids with low resistance power networks

Achieved minimal radiation length for detector integration

Hybrids withstand harsh LHCb operational conditions

Abstract

We present a description of the design process, prototyping and production of the hybrid circuits for the front-end electronics of the Upstream Tracker at LHCb. The multilayer polyamide-based printed circuit boards, or hybrids, are designed to host the front-end ASICs. The ASICs require an optimized power delivery network from 0 to 120MHz, with a maximum of 10^-2 Ohms round-trip resistance, and 100 Ohms differential traces. Hybrids are required to have minimal radiation length, and to withstand the harsh environmental conditions of the data taking through intrinsic radiation hardness characteristics.