Title :
Development of 10-V Josephson series arrays
Author :
Park, Se Il ; Hong, Hyun Kwon
Author_Institution :
Electron. Devices Group, Korea Res. Inst. of Stand. & Sci., Daejon, South Korea
fDate :
4/1/2003 12:00:00 AM
Abstract :
Developed a new fabrication process for 10-V Josephson junction series arrays (JJAs). A plasma nitridation process is employed for reducing the microwave attenuation in the Josephson microstripline. Improvements of microwave attenuation are about 2 dB for test arrays of 2000, 3000, and 4000 Josephson junctions in a single stripline. We obtained stable quantized voltage steps up to 12 V at 76.4 and 86.8 GHz with step amplitudes of more than 5 μA and stability times of more than 5 min. The circuits used 14 648 junctions arranged in 8 parallel paths.
Keywords :
measurement standards; microstrip lines; nitridation; superconducting junction devices; superconducting microwave devices; voltage measurement; 10 V; 76.4 GHz; 86.8 GHz; JJAs; Josephson junction series arrays; Josephson microstripline; microwave attenuation; plasma nitridation process; stability times; stable quantized voltage steps; step amplitudes; test arrays; Attenuation; Circuit stability; Circuit testing; Fabrication; Josephson junctions; Microstrip; Microwave antenna arrays; Plasma stability; Stripline; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2003.809913
