253 citations · 455 across the 11 of their papers we have counts for
9 papers · 1 filter
Elimination of Flux Trapping in Superconducting Circuits in Ambient Magnetic Fields
Rohan T. Kapur, Alex Wynn, Sergey K. Tolpygo +10
Superconductor digital electronics and quantum computing with superconducting qubits are promising next-generation computing technologies. When cooled down or operated in the prese…
Mitigation of Magnetic Flux Trapping in Superconducting Electronics Using Moats
Rohan T. Kapur, Sergey K. Tolpygo, Alex Wynn +7
Magnetic flux (vortex) trapping remains a major obstacle to very large scale integration in superconducting electronics. Moats -- etched regions in circuit layers placed in ground…
Extremely Large Area (88 mm X 88 mm) Superconducting Integrated Circuit (ELASIC)
Rabindra N. Das, Vladimir Bolkhovsky, Alex Wynn +9
Superconducting integrated circuit (SIC) is a promising "beyond-CMOS" device technology enables speed-of-light, nearly lossless communications to advance cryogenic (4 K or lower) c…
Wafer-Scale Characterization of a Superconductor Integrated Circuit Fabrication Process, Using a Cryogenic Wafer Prober
Joshua T. West, Arthur Kurlej, Alex Wynn +3
Using a fully automated cryogenic wafer prober, we measured superconductor fabrication process control monitors and simple integrated circuits on 200 mm wafers at 4.4 K, including…
Planarized Fabrication Process With Two Layers of SIS Josephson Junctions and Integration of SIS and SFS π-Junctions
Sergey K. Tolpygo, Vladimir Bolkhovsky, Ravi Rastogi +6
We present our new fabrication Process for Superconductor Electronics (PSE2) that integrates two (2) layers of Josephson junctions in a fully planarized multilayer process on 200-m…
Superconductor Electronics Fabrication Process with MoN Kinetic Inductors and Self-Shunted Josephson Junctions
Sergey K. Tolpygo, Vladimir Bolkhovsky, D. E. Oates +6
Recent progress in superconductor electronics fabrication has enabled single-flux-quantum (SFQ) digital circuits with close to one million Josephson junctions (JJs) on 1-cm chi…
Developments Toward a 250-nm, Fully Planarized Fabrication Process With Ten Superconducting Layers And Self-Shunted Josephson Junctions
Sergey K. Tolpygo, Vladimir Bolkhovsky, Ravi Rastogi +5
We are developing a superconductor electronics fabrication process with up to nine planarized superconducting layers, stackable stud vias, self-shunted Nb/AlOx-Al/Nb Josephson junc…
Properties of Unshunted and Resistively Shunted Nb/AlOx-Al/Nb Josephson Junctions With Critical Current Densities from 0.1 mA/μm^2 to 1 mA/μm^2
Sergey K. Tolpygo, Vladimir Bolkhovsky, Scott Zarr +5
We investigated current-voltage characteristics of unshunted and externally shunted Josephson junctions (JJs) with high critical current densities, Jc, in order to extract their ba…
Advanced Fabrication Processes for Superconducting Very Large Scale Integrated Circuits
Sergey K. Tolpygo, Vladimir Bolkhovsky, T. J. Weir +4
We review the salient features of two advanced nodes of an 8-Nb-layer fully planarized process developed recently at MIT Lincoln Laboratory for fabricating Single Flux Quantum(SFQ)…