公开(公告)号：EP0843826A1

公开(公告)日：1998-05-27

申请号：EP96919158.0

申请日：1996-06-05

申请人： Micontech, Inc.

发明人： YOU, Hong, K.

IPC分类号： G01R33 ,  H01L39

CPC分类号： H01L39/225 ,  G01R33/0358 ,  Y10S505/846

摘要： The disclosed complex SQUID circuit achieves a high signal gain and high sensitivity for detecting a weak magnetic field. It is characterized by concentric loops (60, 62, 64, 66, 68, 70) of superconducting material, each loop incorporating preferably a pair of Josephson Junctions (76), the Josephson Junctions (76) all aligned in a diameter generally transverse to the diameter defined by the connectors (78, 80) interconnecting the loops (60, 62, 64, 66, 68, 70).

公开(公告)号：EP0446923B1

公开(公告)日：1997-10-15

申请号：EP91103947.7

申请日：1991-03-14

申请人： Research Development Corporation of Japan ,  HITACHI, LTD.

发明人： Nakane, Hideaki ,  Cubillos, Juan Casas ,  Goto, Eiichi

IPC分类号： G01R33/035

CPC分类号： G01R33/0358 ,  Y10S505/846

公开(公告)号：EP0799425A1

公开(公告)日：1997-10-08

申请号：EP95942019.0

申请日：1995-12-14

申请人： FORSCHUNGSZENTRUM JÜLICH GMBH

发明人： ZHANG, Yi ,  WOLF, Walter ,  BOUSACK, Herbert ,  SOLTNER, Helmut

IPC分类号： G01R33 ,  A61B5

CPC分类号： G01R33/0358 ,  G01R33/022 ,  Y10S505/846

摘要： The invention concerns a gradiometer comprising two SQUIDs, each of which contains a SQUID loop. The object of the invention is to provide a gradiometer of this type wherein increased measuring accuracy of the magnetic field or of the magnetic field gradient is attained in a comparatively simple manner. To this end the gradiometer comprises SQUIDs disposed relative to one another such that the SQUID loops lie in a plane at a distance of a basic length from one another and a flat flux concentrator (FT1, FT2), parallel to this plane, surrounds the two SQUID loops. A flux concentrator is further provided which is mirror-symmetrical laterally to the base line interconnecting the centres of the two SQUID loops. Advantageously a given desired basic length can be set by suitable structural measures without increasing the inductance and thereby reducing the gradiometer signal.

公开(公告)号：EP0697602A3

公开(公告)日：1997-08-13

申请号：EP95108604.0

申请日：1995-06-06

申请人： International Business Machines Corporation

发明人： Kirtley, John Robert ,  Ketchen, Mark Benjamin

IPC分类号： G01R33/035

CPC分类号： G01R33/0206 ,  G01R33/0358 ,  Y10S505/846

摘要： The present invention provides a miniature three-axis instrument (70) for measuring the actual magnetic field vector. The novel instrument of the invention has three magnetometers (72,74,76) on a single chip (71) configured such that their pickup elements are coplanar, colinear and in fairly close proximity to each other. The tip of the chip, with the three pickup elements (72,74,76), is fashioned to allow as close an approach to the surface to be scanned as is possible with current single magnetometer scanning microscopes. The different positions of the pickup elements on the chip is compensated for digitally after data acquisition. The z-axis magnetometer (72) has a planar pickup coil structure as is known in the art while the x-axis and y-axis sensing elements (74,76) have a novel multi-turn, thin-film structure in the form of a planar solenoid which is another novel aspect of the present invention.

公开(公告)号：EP0704060B1

公开(公告)日：1997-03-05

申请号：EP94917554.1

申请日：1994-06-15

申请人： FORSCHUNGSZENTRUM JÜLICH GMBH

发明人： ZHANG, Yi

IPC分类号： G01R33/035

CPC分类号： G01R33/0354 ,  Y10S505/846

摘要： A RF-SQUID consists of a superconductive ring (2) with a Josephson junction (5) and coupled to an electric resonant circuit (1) formed by a superconductive microwave resonator. The object of the invention is to create a RF-SQUID magnetometer with an improved field sensitivity which may be produced from high-temperature superconductive materials. For that purpose, the microwave resonator is designed as a closed superconductive circuit (1). Because of the closed circuit, a μ resonator is obtained for the first time, which functions besides as a pick-up coil. In comparison with a design having a μ/2 resonator, magnetic flow collection is considerably increased.

公开(公告)号：EP0474235B1

公开(公告)日：1996-12-04

申请号：EP91115024.1

申请日：1991-09-05

申请人： DAIKIN INDUSTRIES, LIMITED

发明人： Ueda, Tomoaki

IPC分类号： G01R33/035

CPC分类号： G01R33/0356 ,  Y10S505/846

公开(公告)号：EP0704060A1

公开(公告)日：1996-04-03

申请号：EP94917554.0

申请日：1994-06-15

申请人： FORSCHUNGSZENTRUM JÜLICH GMBH

发明人： ZHANG, Yi

IPC分类号： G01R33 ,  H01L39

CPC分类号： G01R33/0354 ,  Y10S505/846

摘要： A RF-SQUID consists of a superconductive ring (2) with a Josephson junction (5) and coupled to an electric resonant circuit (1) formed by a superconductive microwave resonator. The object of the invention is to create a RF-SQUID magnetometer with an improved field sensitivity which may be produced from high-temperature superconductive materials. For that purpose, the microwave resonator is designed as a closed superconductive circuit (1). Because of the closed circuit, a lambda resonator is obtained for the first time, which functions besides as a pick-up coil. In comparison with a design having a lambda /2 resonator, magnetic flow collection is considerably increased.

公开(公告)号：EP0503108B1

公开(公告)日：1995-12-27

申请号：EP91103700.0

申请日：1991-03-11

申请人： SIEMENS AKTIENGESELLSCHAFT

发明人： Uhl, Dieter, Dipl.-Ing. (FH) ,  Seifert, Heinrich, Dr.

IPC分类号： G01R33/035

CPC分类号： G01R33/0358 ,  Y10S505/846

公开(公告)号：EP0413388B1

公开(公告)日：1995-11-29

申请号：EP90202174.0

申请日：1990-08-10

申请人： Philips Patentverwaltung GmbH ,  Philips Electronics N.V.

发明人： Lüdeke, Kai-Michael

IPC分类号： G01R33/035

CPC分类号： G01R33/0354 ,  Y10S505/846

公开(公告)号：EP0663599A1

公开(公告)日：1995-07-19

申请号：EP93916252.5

申请日：1993-08-02

申请人： DAIKIN INDUSTRIES, LIMITED

发明人： SATA, Kenichi

IPC分类号： G01R33/035 ,  H01F5/02 ,  H01F27/22 ,  H01F6/04

CPC分类号： G01R33/0354 ,  G01R33/0358 ,  H01F5/02 ,  Y10S505/846

摘要： A SQUID flux meter includes a pickup coil wound on a cylindrical resin-coated bobbin made of woven wire of a non-magnetic material, such as copper, having a high heat conductivity. The wire-woven structure includes straight filaments parallel to and around the bobbin axis, and circular filaments perpendicular to the straight filaments. In this way, the heat conductivity of the bobbin can be improved without affecting the input/output characteristics of the SQUID flux meter. Therefore, the cooling efficiency of the pickup coil made of a superconducting wire is improved, and the SQUID flux meter is effectively cooled to very low temperature by the refrigerator.