High-speed single-flux-quantum circuit using planarized niobium-trilayer Josephson junction technology

P. I. Bunyk; A. Oliva; V. K. Semenov; M. Bhushan; K. K. Likharev; J. E. Lukens; M. B. Ketchen; W. H. Mallison

doi:10.1063/1.114147

High-speed single-flux-quantum circuit using planarized niobium-trilayer Josephson junction technology

P. I. Bunyk
, A. Oliva
, V. K. Semenov
, M. Bhushan
, K. K. Likharev
, J. E. Lukens
, M. B. Ketchen
, W. H. Mallison

Physics and Astronomy

Stony Brook University
IBM
Nokia

Research output: Contribution to journal › Article › peer-review

63 Scopus citations

Abstract

A simple test circuit of the rapid single-flux-quantum (RSFQ) logic family has been implemented in a planarized all-refractory technology using only two superconducting layers and small Nb/AlO_x/Nb Josephson junctions (nominally 1.5×1.5 μm²) with critical current density j_c≈6 kA/cm². A special layout design of the integrated circuit (including a SFQ pulse generator, Josephson transmission line, and T flip-flop) was used to reduce 3D inductances resulting from absence of the ground plane. For samples with various junction parameters, the maximum frequency of the SFQ pulse train, which could be divided by 2 by the flip-flop, ranged from 200 to 370 GHz.

Original language	English
Pages (from-to)	646
Number of pages	1
Journal	Applied Physics Letters
Volume	66
Issue number	5
DOIs	https://doi.org/10.1063/1.114147
State	Published - 1995

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title = "High-speed single-flux-quantum circuit using planarized niobium-trilayer Josephson junction technology",

abstract = "A simple test circuit of the rapid single-flux-quantum (RSFQ) logic family has been implemented in a planarized all-refractory technology using only two superconducting layers and small Nb/AlOx/Nb Josephson junctions (nominally 1.5×1.5 μm2) with critical current density jc≈6 kA/cm2. A special layout design of the integrated circuit (including a SFQ pulse generator, Josephson transmission line, and T flip-flop) was used to reduce 3D inductances resulting from absence of the ground plane. For samples with various junction parameters, the maximum frequency of the SFQ pulse train, which could be divided by 2 by the flip-flop, ranged from 200 to 370 GHz.",

author = "Bunyk, \{P. I.\} and A. Oliva and Semenov, \{V. K.\} and M. Bhushan and Likharev, \{K. K.\} and Lukens, \{J. E.\} and Ketchen, \{M. B.\} and Mallison, \{W. H.\}",

year = "1995",

doi = "10.1063/1.114147",

language = "English",

volume = "66",

pages = "646",

journal = "Applied Physics Letters",

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T1 - High-speed single-flux-quantum circuit using planarized niobium-trilayer Josephson junction technology

AU - Bunyk, P. I.

AU - Oliva, A.

AU - Semenov, V. K.

AU - Bhushan, M.

AU - Likharev, K. K.

AU - Lukens, J. E.

AU - Ketchen, M. B.

AU - Mallison, W. H.

PY - 1995

Y1 - 1995

N2 - A simple test circuit of the rapid single-flux-quantum (RSFQ) logic family has been implemented in a planarized all-refractory technology using only two superconducting layers and small Nb/AlOx/Nb Josephson junctions (nominally 1.5×1.5 μm2) with critical current density jc≈6 kA/cm2. A special layout design of the integrated circuit (including a SFQ pulse generator, Josephson transmission line, and T flip-flop) was used to reduce 3D inductances resulting from absence of the ground plane. For samples with various junction parameters, the maximum frequency of the SFQ pulse train, which could be divided by 2 by the flip-flop, ranged from 200 to 370 GHz.

AB - A simple test circuit of the rapid single-flux-quantum (RSFQ) logic family has been implemented in a planarized all-refractory technology using only two superconducting layers and small Nb/AlOx/Nb Josephson junctions (nominally 1.5×1.5 μm2) with critical current density jc≈6 kA/cm2. A special layout design of the integrated circuit (including a SFQ pulse generator, Josephson transmission line, and T flip-flop) was used to reduce 3D inductances resulting from absence of the ground plane. For samples with various junction parameters, the maximum frequency of the SFQ pulse train, which could be divided by 2 by the flip-flop, ranged from 200 to 370 GHz.

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DO - 10.1063/1.114147

M3 - Article

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SN - 0003-6951

VL - 66

SP - 646

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 5

ER -

High-speed single-flux-quantum circuit using planarized niobium-trilayer Josephson junction technology

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