CLICTD: A monolithic HR-CMOS sensor chip for the CLIC silicon tracker

TL;DR

The CLICTD chip is a monolithic HR-CMOS sensor designed for the CLIC silicon tracker, featuring elongated pixels with integrated time and energy measurement capabilities, optimized for prompt charge collection and high-resolution tracking.

Contribution

This work introduces a novel monolithic HR-CMOS pixel sensor with integrated time and energy measurement tailored for high-energy physics tracking applications.

Findings

Successful fabrication in 180 nm CMOS process

First laboratory measurement results demonstrate functionality

Integrated time and energy measurement in each pixel

Abstract

The CLIC Tracker Detector (CLICTD) is a monolithic pixelated sensor chip produced in a $180$ nm imaging CMOS process built on a high-resistivity epitaxial layer. The chip, designed in the context of the CLIC tracking detector study, comprises a matrix of ${16\times128}$ elongated pixels, each measuring ${300\times30}$ $\mu$m$^2$. To ensure prompt charge collection, every elongated pixel is segmented in eight sub-pixels, each containing a collection diode and a separate analog front-end. A simultaneous $8$-bit time measurement with $10$ ns time bins and $5$-bit energy measurement with programmable range is performed in the on-pixel digital logic. The main design aspects as well as the first results from laboratory measurements with the CLICTD chip are presented.