  This white paper presents a single-layer mask, found at
https://github.com/Boulder-Cryogenic-Quantum-Testbed/simple-resonator-mask. It
is designed for fabrication of superconducting microwave resonators towards 1:1
comparisons of dielectric losses from the metal-substrate interface.
Finite-element electromagnetic simulations are used to determine participation
ratios of the four major regions of the on-chip devices, as well as to confirm
lack of crosstalk between neighboring devices and demonstrate coupling
tunability over three orders of magnitude. This mask is intended as an
open-source community resource for facilitating precise and accurate
comparisons of materials in the single-photon, millikelvin regime.
