Semiconductor device manufacturing: process – Having magnetic or ferroelectric component
Reexamination Certificate
2005-06-14
2005-06-14
Coleman, W. David (Department: 2823)
Semiconductor device manufacturing: process
Having magnetic or ferroelectric component
C505S110000, C505S874000
Reexamination Certificate
active
06905887
ABSTRACT:
A solid state dc-SQUID includes a superconducting loop containing a plurality of Josephson junctions, wherein an intrinsic phase shift is accumulated through the loop. In an embodiment of the invention, the current-phase response of the dc-SQUID sits in a linear regime where directional sensitivity to flux through the loop occurs. Changes in the flux passing through the superconducting loop stimulates current which can be quantified, thus providing a means of measuring the magnetic field. Given the linear and directional response regime of the embodied device, an inherent current to phase sensitivity is achieved that would otherwise be unobtainable in common dc-SQUID devices without extrinsic intervention.
REFERENCES:
patent: 5157466 (1992-10-01), Char et al.
patent: 5767043 (1998-06-01), Cantor et al.
patent: 5880069 (1999-03-01), Nakao et al.
patent: 5962866 (1999-10-01), DiIorio et al.
patent: 6476413 (2002-11-01), Jia et al.
patent: 6624122 (2003-09-01), Holesinger et al.
patent: WO02/069411 (2002-09-01), None
D. Dimos, P. Chaudhari, J. Mannhart, and F.K. LeGoues, “Oreintation Dependence of Grain-Boundary Critical Currents in YBa2Cu3O7 Bicrystals” Physcal Review Letters, vol. 61, No. 2, pp 219-224.
A. Di Chiara et al., “YBa2Cu3O7-x grain boundary Josephson junctions with a MgO seed layer”, IEEE Transactions on Applied Superconductivity, vol. 7, No. 2, Jun. 1997, pp 3327-3330.
C. Bruder, A. van Otterlo, and G. T. Zimanyi, “Tunnel junctions of Unconventional Superconductors”, Physical Review B 51, p. 12904 (1995).
H. Hilgenkamp, J. Mannhart, and B. Mayer, “Implications of dx2-y2 symmetry and faceting for the transport properties of grain boundaries in high-TCsuperconductors”, Physical Review B 53, pp. 14586-14593 (1996).
E. ll'ichev, V. Zakosarenko, R. P. J. Ijsselsteijn, V. Schultze, H.-G. Meyer, H. E. Hoenig, H. Hilgenkamp, and J. Mannhart, “Nonsinusoidal Current-Phase Relationship of Grain Boundary Josephson junctions in High-Tc Superconductors”, Physical Review Letters 81, pp. 894-897 (1998).
E. ll'ichev, M. Grajcar, R. Hlubina, R.P.J. IJsselsteijn, H.E. Hoenig, H.G. Meyer, A. Golubov, M.H.S. Amin, A.M. Zagoskin, A.N. Omelyanchouk, and M.Yu. Kupriyanov, “Degenerate ground state in a mesoscopic YBa2Cu3O7−xgrain boundary Josephson junction”, Los Alamos National Laboratory preprint server cond-mat/0102404 v2, (2001), last accessed Dec. 18, 2002.
S. Nicoletti, H. Moriceau, J.C. Villegier, D. Chateigner, B. Bourgeaux, C. Cabanel, and J. Y. Laval, “Bi-epitaxial YBCO grain boundary Josephson junctions on SrTiO3and sapphire substrates”, Physica C 269, pp. 255-267 (1996).
R.R. Schulz B. Chesca, B. Goetz, C.W. Schneider, A. Schmehi, H. Bielefeldt, H. Hilgenkamp, J. Mannhart, and C.C. Tsuei, “Design and realization of an all d-wave dc-superconducting quantum interference device”, Applied Physics Letters 76, pp. 912-914 (2000).
F. Tafuri, F. Carillo, F. Lombardi, F. Miletto Granozio, F. Ricci, U. Scotti di Uccio, A. Barone, G. Testa, E. Sarnelli, J.R. Kirtley, “Feasibility of Biepitaxial YbaCuO Josephson Junctions for Fundamental Studies and Potential Circuit Implementation”, Los Alamos National Laboratory preprint server condmat/0010128 (2000), accepted for publication Phys. Rev. B, last accessed Dec. 18, 2002.
Y. Tanaka and S. Kashiwaya, “Theory of Josephson effects in anisotropic superconductor”, Physical Review B 56, pp. 892-912 (1997).
C. C. Tsuei and J. R. Kirtley, “Pairing symmetry in cuprate superconductors”, Reviews of Modern Physics 72, Issue 4, pp. 969-1016 (2000).
D. J. Van Harlingen , “Phase-sensitive tests of the symmetry of the pairing state in the high-temperature superconductors-Evidence for dx2-y2symmetry”, Reviews of Modern Physics 67, 515-535 (1995).
D. Koelle, R. Kleiner, F. Ludwig, E. Dantsker and John Clarke, “High-transition-temperature superconducting quantum interference devices”, Reviews of Modern Physics 71, pp. 631-686 (1999).
H. Hilgenkamp, “Josephson devices with intrinsic π-phase shifts” abstract from “Structure and Arrangement of Vortices in Superconductors”, Conference Prague Czech Republic, Apr. 3-7, 2002.
Amin Mohammad H. S.
Duty Timothy
Hilton Jeremy P.
Omelyanchouk Alexander
Rose Geordie
Coleman W. David
D-Wave Systems Inc.
Jones Day
Lovejoy Brett
LandOfFree
High sensitivity, directional dc-SQUID magnetometer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High sensitivity, directional dc-SQUID magnetometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High sensitivity, directional dc-SQUID magnetometer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3474107