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31. 发明专利

JPH07176800A SUPERCONDUCTING SIGNAL PROCESSOR 失效
公开(公告)号：JPH07176800A
公开(公告)日：1995-07-14
申请号：JP31954893
申请日：1993-12-20
申请人： HITACHI LTD
发明人： HATANO MUTSUKO , SAITO KAZUO , SUGA MITSUO , TAKAGI KAZUMASA
IPC分类号： H01L39/22 , G06J1/00 , H03H17/02
摘要： PURPOSE:To process signals as a digital filter and in Fourier transform at high speed and with high sensitivity, by passing all of output current of a first to fourth superconducting electron wave elements through an inductance, and detecting the current by means of a Josephson magnetic flux quantum interference type element, composed of an inductance and Josephson elements, connected with the superconducting electron wave elements. CONSTITUTION:Bias current is removed from the output current of detectors, and the Andreyev reflected wave that contributes to interference is extracted. Positive D.C. bias current plus input signal current is applied to two 201, 203 of six-input superconducting electron wave elements 201-204, and negative D.C. bias current plus input signal current is applied to the other two 202, 204. The detector electrodes of the superconducting electron wave elements 201 and 202, and 203 and 204 are connected with each other, respectively, and an inductance 210 is placed between the respective connections. The current passing through the inductance 210 is detected using a Josephson magnetic flux quantum interference type element composed of an inductance 211 and Josephson junctions 212, 213.

32. 发明专利

JPH07147435A SUPERCONDUCTIVE DEVICE AND ITS MANUFACTURE 失效
公开(公告)号：JPH07147435A
公开(公告)日：1995-06-06
申请号：JP29630693
申请日：1993-11-26
申请人： HITACHI LTD
发明人： SAITO KAZUO , SUGA MITSUO , HATANO MUTSUKO
IPC分类号： H01L39/22 , B82B1/00 , H01L39/24
摘要： PURPOSE:To enable integration, superhigh speed and low consumption electric power by forming a superconductive coupling region equivalent to a superconductive quantum fine line in a normal conductor which constitutes superconductive weak coupling effectively. CONSTITUTION:Superconductive wave function effuses in a normal conductor region of flat type superconductive coupling by superconductive proximity effect. When the widths of superconductive electrodes 301, 302 are made narrow, effusion of superconductive wave function attenuates to a width direction of the electrodes 301, 302. Therefore, a superconductive coupling region which is narrower than the actual electrodes 301, 302 is formed in a normal conductor. The interval between and widths of the electrodes 301, 302, the thickness of the superconductor 300 and a normal conductor layer 200, etc., are designed so that the size of the superconductive coupling region (a rough diameter of a sectional area of a superconductor region in a normal conductor) is about the same or less than a coherence length of superconduction. Thereby, integration, superhigh speed and low consumption electric power can be realized.

33. 发明专利

JPH0786647A SUPERCONDUCTING ELEMENT AND ITS MANUFACTURE 失效
公开(公告)号：JPH0786647A
公开(公告)日：1995-03-31
申请号：JP22685493
申请日：1993-09-13
申请人： HITACHI LTD
发明人： SAITO KAZUO , HATANO MUTSUKO , SUGA MITSUO
IPC分类号： H01L39/22
摘要： PURPOSE:To provide a fast new-function-element of low-energy-consumption provided with at least two superconducting joint parts, connected in series. CONSTITUTION:This element consists of the first superconducting joint part wherein at least two incidence electrodes, into which quasiparticles come in, are provide and assigned with such electrode interval (intervals between superconducting electrodes 101, 102 to 103) as will cause andreyer reflection, however with no connection in super-conduction manner, and the second superconducting joint part connected to it in series in superconducting manner (superconducting electrodes 103 to 104), and further, a means that controls amplitude of superconducting wave motion function leaking from the superconducting joint part (control electrodes 500 and 501) is included. The counter electrodes of the first super-conduction joint part is provided with a step-like shape so that the quasiparticles subjected to the andreeffu reflection will interfere. With the current made to flow in the first superconducting joint part as an input and the state of the second one as an output, a superconducting element provided with a threshold logic function that allow adjustment of input signal weight by a single element with the control electrode is realized.

34. 发明专利

JPH06350151A SUPERCONDUCTING DEVICE 失效
公开(公告)号：JPH06350151A
公开(公告)日：1994-12-22
申请号：JP13709793
申请日：1993-06-08
申请人： HITACHI LTD
发明人： SUGA MITSUO , SAITO KAZUO , HATANO MUTSUKO , NISHINO JUICHI , TAKAGI KAZUMASA
IPC分类号： G06G7/60 , H01L39/22 , H03K19/195
摘要： PURPOSE:To provide a multiple input superconducting device which is operated at a very high speed with low power consumption and can change corresponding relation between input and output including weighted addition and operation as a neuron device. CONSTITUTION:This device is comprised at least two or more superconducting electrodes (111, 112, 113) constituted of at a superconductor, at least one normal conductor 211 provided in contact with each of the superconducting electrodes (111, 112, 113), at least one tunnel junction provided in contact with the normal conductor 211 and a means for controlling quasiparticle state density inside the normal conductor 211. Current voltage characteristic at both ends of the tunnel junction is controlled by controlling the quasiparticle state density by an input signal.

35. 发明专利

JPH06196767A SUPERCONDUCTING DEVICE 失效
公开(公告)号：JPH06196767A
公开(公告)日：1994-07-15
申请号：JP34235392
申请日：1992-12-22
申请人： HITACHI LTD
发明人： HATANO MUTSUKO , SAITO KAZUO , SUGA MITSUO , NISHINO JUICHI , TAKAGI KAZUMASA
IPC分类号： H01L27/10 , B82B1/00 , H01L39/22
摘要： PURPOSE:To embody a superconducting device heightening an interference effect of an electron wave while having a function able to perform operational processing by one element and operating at high speed with low consumption power and allowing high integration. CONSTITUTION:This is a superconducting device being opposedly provided with an input electrode 3 consisting of a superconductor or a normal conductor supplying an electron wave into a semiconductor 2 and a superconducting electrode 1 on the semiconductor 2 while collecting electron waves performing Andreev reflection in the interface between the superconducting electrode 1 and the semiconductor 2 in an output electrode provided on the input electrode 3 or near thereto for being detected as a current while having the constitution where a plurality of input electrodes 4 locally controlling a phase of an electron wave in the semiconductor 2 are formed on the semiconductor 2 between the input electrode 3 or the output electrode and the superconducting electrode 1 through an insulating film 5. Accordingly, a degital/analog transducer, a detector and a theshold value logical circuit can be constituted by one element.

36. 发明专利

JPH05335640A 失效
公开(公告)号：JPH05335640A
公开(公告)日：1993-12-17
申请号：JP13833292
申请日：1992-05-29
申请人： HITACHI LTD
发明人： SUGA MITSUO , NISHINO JUICHI , HIRATANI MASAHIKO , FUKAZAWA TOKUMI , AKAMATSU SHOICHI , TSUKAMOTO AKIRA , TARUYA YOSHINOBU , TAKAGI KAZUMASA
IPC分类号： H01L39/22
摘要： PURPOSE:To provide a superconductive element which can be manufactured easily and has improved amplification characteristics or switching characteristics. CONSTITUTION:Substances 3 and 4 in non-superconductive state are allowed to contact a copper oxide semiconductor 2 and a groove with a width of 1mum or less is provided between the substances 3 and 4 in non-conductive state thus inducing superconductivity within the oxide. By adding an insulation film 5 and a gate electrode 6 to the structure, an element which is controlled by electric field can also be obtained.

37. 发明专利

JPH04334074A SUPERCONDUCTING DEVICE 失效
公开(公告)号：JPH04334074A
公开(公告)日：1992-11-20
申请号：JP10410191
申请日：1991-05-09
申请人： HITACHI LTD
发明人： SUGA MITSUO , AKAMATSU SHOICHI , HIRATANI MASAHIKO , SAITO SHINICHIRO , FUKAZAWA TOKUMI , NISHINO JUICHI , KANEBORI KEIICHI , TARUYA YOSHINOBU , TAKAGI KAZUMASA
IPC分类号： H01L29/78 , H01L39/02 , H01L39/22
摘要： PURPOSE:To obtain a superconducting device have a superconducting element exhibiting superior superconducting characteristics, by forming the superconducting element wherein at least an electrode of oxide superconductor is constituted on a substrate composed of material shown by a specified constitutional formula. CONSTITUTION:An Nd1.7Ba1.3Cu3Oy semiconductor thin film (y=7.1) 2 is formed on a Pr1.5Ba1.5Cu3Oy substrate 1 of (100) face orientation. After a YBa2Cu3Oy (y=6.9) oxide superconducting thin film constituting a source 3 and a drain 4 is formed on the thin film 2, the source 3, the drain 4, and a channel part 5 are formed by a reactive ion etching method. A Pr1.5Ba1.5Cu3Oy thin film 6 being an insulating film and a YBa2Cu3Oy (y=6.9) oxide superconducting thin film 7 being a gate electrode film is formed by a high frequency magnetron sputtering method. By a reactive ion beam etching method, a pattern as the gate electrode film is worked and formed on the thin film 7, thus obtaining a superconducting device having a superconducting element.

38. 发明专利

JPH04187518A LN2-XCAXCUO4-Y(LN:SM,ND,PR) N TYPE COPPER OXIDE SUPERCONDUCTOR 失效
公开(公告)号：JPH04187518A
公开(公告)日：1992-07-06
申请号：JP31401690
申请日：1990-11-21
申请人： HITACHI LTD
发明人： HIRATANI MASAHIKO , AKAMATSU SHOICHI , SUGA MITSUO , KANEBORI KEIICHI
IPC分类号： C01G3/00 , C01G1/00 , H01B12/00 , H01L39/00 , H01L39/12
摘要： PURPOSE:To maintain superconductivity of a p-type copper oxide superconductor by synthesizing an n-type copper oxide superconductor expressed by a specific chemical formula in an atmosphere under a high partial pressure of O2. CONSTITUTION:A rare earth element oxide such as Nd2O, Sm2O3 or Pr6O11 and alkaline earth metallic compounds such as CuO and CaCO3 are wet-mixed using an organic solvent and subsequently dry-mixed. The resultant mixed powder is then thermally reacted at respective temperatures of 900, 950 and 980 deg.C in an N2 Gas stream and pulverized to provide a reaction product, which is formed into pellets and sintered at a prescribed temperature in an O2 gas stream. The resultant sintered product is then heat-treated at about 500 deg.C in an atmosphere under 0-50% partial pressure of O2 in a mixed gas of O2 and Ar to afford the objective n-type copper oxide superconductor expressed by the formula (Ln is Nd, Sm or Pr; 0.01

39. 发明专利

JPH0429381A FIELD EFFECT TYPE THREE-TERMINAL SUPERCONDUCTIVE ELEMENT AND CIRCUIT ELEMENT USING SAME 失效
公开(公告)号：JPH0429381A
公开(公告)日：1992-01-31
申请号：JP13384290
申请日：1990-05-25
申请人： HITACHI LTD
发明人： SUGA MITSUO , HIRATANI MASAHIKO , AKAMATSU SHOICHI , SAITO SHINICHIRO , FUKAZAWA TOKUMI , KANEBORI KEIICHI , TARUYA YOSHINOBU
IPC分类号： H01L39/22
摘要： PURPOSE:To improve performance characteristics of an element by specifying an oxide superconductive material used for an oxide superconductive element, an oxide semiconductor material and an element structure. CONSTITUTION:Two superconductive electrodes 8 and 10 are connected through an oxide semiconductor 9 and the oxide semiconductor 9 is a thin film which is expressed by Pr1+xBa2-xCu3Oy. However, the Pr1+xBa2-xCu3Oy is obtained by replacing Ba by Pr partially in PrBa2Cu3Oy. It is desirable that x should be 0 0.5, thus causing it to be unsuitable for a semiconductor phase. As a structure of a superconductive element, it is desirable that an oxide superconductor thin film and an oxide semiconductor thin film is laminated or connection is made with a gap which is less than 0.2mum, thus obtaining a large field effect and allowing a switching characteristic to be improved.

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