Low-background temperature sensors fabricated on parylene substrates

TL;DR

This paper presents the development of ultra-low radioactivity temperature sensors on parylene substrates, demonstrating their functionality, reliability, and suitability for low-background physics experiments such as dark matter detection.

Contribution

It introduces a novel fabrication method for low-radioactivity temperature sensors on parylene, suitable for sensitive physics experiments.

Findings

Sensors function reliably and robustly

Sensors are highly radio-pure

Proof-of-concept for low-background electronic circuits

Abstract

Temperature sensors fabricated from ultra-low radioactivity materials have been developed for low-background experiments searching for neutrinoless double-beta decay and the interactions of WIMP dark matter. The sensors consist of electrical traces photolithographically-patterned onto substrates of vapor-deposited parylene. They are demonstrated to function as expected, to do so reliably and robustly, and to be highly radio-pure. This work is a proof-of-concept study of a technology that can be applied to broad class of electronic circuits used in low-background experiments.