High-Quality Factor Superconducting Flexible Resonators Embedded in Thin-Film Polyimide HD-4110

作者：Zou Simin^*; Cao Yang; Gupta Vaibhav; Yelamanchili Bhargav; Sellers John A; Ellis Charles D; Tuckerman David B; Hamilton Michael C

来源：IEEE Transactions on Applied Superconductivity, 2017, 27(7): 1700405.

DOI：10.1109/TASC.2017.2732281

• Flexible
• loss tangent
• microstrip
• niobium
• polyimide
• resonators
• superconducting

We present the design, fabrication procedure, and measurement results of Nb superconducting microstrip transmission line resonators fabricated using thin-film polyimide HD-4110, including both nonembedded and embedded versions. These resonators were used to characterize the microwave dielectric loss tangent of 20 mu m thick polyimide HD-4110 at deep cryogenic temperatures. We observed high-quality factors (Q) up to 21 040 at 1.2 K in the frequency range of 2-21 GHz for nonembedded resonators, indicating that the dielectric loss tangent can be less than 5x10(-5). Embedded resonators with an additional 20 mu m thick encapsulation layer also exhibited Q values as high as similar to 19 200. Dielectric and conductor (quasiparticle) loss have been compared between the two types of resonators. This study provides information applicable to the design of future high-density, flexible, multilayer superconducting cables, which are of great interest for potential applications in cryogenic electronics systems, including quantum computers.

• 出版日期2017-10
• 单位Microsoft