We report on the development of commercially fabricated multi-chroic antenna coupled Transition Edge Sensor (TES) bolometer arrays for Cosmic Microwave Background (CMB) polarimetry experiments. The orders of magnitude increase in detector count for next-generation CMB experiments requires a new approach in detector wafer production to increase fabrication throughput. We describe collaborative efforts with a commercial superconductor electronics fabrication facility (SeeQC, Inc.) to fabricate antenna coupled TES bolometer detectors. We have successfully fabricated an operational dual-polarization, dichroic sinuous antenna-coupled TES detector array on a 150 mm diameter wafer. The fabricated detector arrays have average yield of 95\% and excellent uniformity across the wafer. Both RF characteristics and TES bolometer properties are suitable for CMB observations. We successfully fabricated different types of TES bolometers optimized for frequency-multiplexing readout, time-domain multiplexing readout, and microwave SQUID multiplexing readout. We also demonstrated high production throughput. We discuss the motivation, design considerations, fabrication processes, test results, and how industrial detector fabrication could be a path to fabricate hundreds of detector wafers for future CMB polarimetry experiments.
@article{arxiv.1912.12782,
title = {Commercially fabricated antenna-coupled Transition Edge Sensor bolometer detectors for next generation Cosmic Microwave Background polarimetry experiment},
author = {Aritoki Suzuki and Nicholas Cothard and Adrian T. Lee and Michael D. Niemack and Christopher Raum and Mario Renzullo and Trevor Sasse and Jason Stevens and Patrick Truitt and Eve Vavagiakis and John Vivalda and Benjamin Westrook and Daniel Yohannes},
journal= {arXiv preprint arXiv:1912.12782},
year = {2020}
}
Comments
7 pages, 5 figures, Proceedings for LTD-18, Accepted for publication in JLTP