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21. 发明专利

JPH06176961A FEEDTHROUGH TYPE LAMINATED CERAMIC CAPACITOR 失效
公开(公告)号：JPH06176961A
公开(公告)日：1994-06-24
申请号：JP35342892
申请日：1992-12-10
申请人： TDK CORP
发明人： UCHIKOBA FUMIO , ITO TAKU , FURUBAYASHI MAKOTO
IPC分类号： H01G4/12 , H01G4/35 , H01G4/42
摘要： PURPOSE:To provide a feedthrough type laminated ceramic capacitor wherein the structure of the capacitor itself is improved to raise a resonance frequency. CONSTITUTION:With the assumption of the width between two side surfaces which a ground internal electrode 1 reaches to be a lateral width W and with the assumption of the width between two side surfaces which a signal internal electrode 2 reaches to be a longitudinal width L, a ratio of the lateral width W/longitudinal width L is 1/3 or less.

22. 发明专利

JPH06176960A FEEDTHROUGH TYPE LAMINATED CERAMIC CAPACITOR 失效
公开(公告)号：JPH06176960A
公开(公告)日：1994-06-24
申请号：JP35342792
申请日：1992-12-10
申请人： TDK CORP
发明人： UCHIKOBA FUMIO , ITO TAKU , FURUBAYASHI MAKOTO
IPC分类号： H01G4/12 , H01G4/35 , H01G4/42
摘要： PURPOSE:To raise a resonance frequency by lowering resistance of a ground internal electrode of a capacitor by specifying the thickness of the ground internal electrode. CONSTITUTION:There are formed on a sheet a ground internal electrode 1 and a signal internal electrode 2 into a feedthrough type laminated capacitor by making use of screen printing of palladium paste. The sheets after printed are laminated at proper pressure, and are divided for each capacitor element and are thereafter sintered. Thereafter, the capacitor is yielded by forming external electrodes 4-6. The thickness of the ground internal electrode 1 is set to be 5mum or more. Further, since a resonance frequency is raised irrespective of the thickness of the ground internal electrode is increased, the thickness of the signal internal electrode 2 is made thinner than the thickness of the ground internal electrode 1. Hereby, in a feedthrough type laminated ceramic capacitor having a higher resonance frequency, it is possible to deal with the need of a higher radio frequency.

23. 发明专利

JPH0575317A TRI-PLATE LINE 失效
公开(公告)号：JPH0575317A
公开(公告)日：1993-03-26
申请号：JP25872891
申请日：1991-09-11
申请人： TDK CORP
发明人： MIURA TARO , FURUBAYASHI MAKOTO , KAWAMURA KEIZO , FUJII TADAO , NAKAI SHINYA
IPC分类号： H01P3/08 , H01P11/00
摘要： PURPOSE:To reduce the electric resistance of an inner conductor of the tri-plate line. CONSTITUTION:In the tri-plate line in which an inner conductor (20) is opposite to a couple of outer conductors via a dielectric body, the inner conductor is formed by applying flaky metallic silver 20a and a paste 20b including metallic powder forming silver and silver alloy onto an unbaked dielectric board and baking it at a temperature higher than the melting point of the alloy and lower than the melting point of the silver.

24. 发明专利

JPH0563405A DIELECTRIC SUBSTRATE TRIPLET STRIP LINE 失效
公开(公告)号：JPH0563405A
公开(公告)日：1993-03-12
申请号：JP24841291
申请日：1991-09-03
申请人： TDK CORP
发明人： MIURA TARO , FURUBAYASHI MAKOTO , FUJII TADAO , NAKAI SHINYA
IPC分类号： H01P1/203 , H01P3/08 , H01P7/08
摘要： PURPOSE:To improve the value Q of the triplet strip line resonator by putting a metallic silver intra-electric conductor between the upper and lower dielectric boards to be glass-welded. CONSTITUTION:Two sheets of dielectric with a conductor for ground conductor all over are welded between glass flit or the like by inserting a metallic foil intra-electric conductor between a pair of dielectrics with the non-conductor surface opposed. The width of the metallic foil intra-conductor is made more than 7mum. A through-hole is provided while metallizing the inside at an arbitrary part of the dielectric substrate, and it is made the connection terminal with the external circuit by soldering or brazing the intra-conductor after welding.

25. 发明专利

JPH04292455A PRODUCTION OF FINE POWDER OF CERAMIC RAW MATERIAL 失效
公开(公告)号：JPH04292455A
公开(公告)日：1992-10-16
申请号：JP8067791
申请日：1991-03-19
申请人： TDK CORP
发明人： OKA HITOSHI , TATEMOTO KAZUSHI , FURUBAYASHI MAKOTO
IPC分类号： C04B35/626 , C04B35/00 , C04B35/46 , C04B35/49
摘要： PURPOSE:To obtain ceramic raw material fine powder having uniform and small particle diameter. CONSTITUTION:An aqueous solution (solution A) containing oxalic acid and titanium and/or zirconium is dripped into an aqueous solution (solution B) containing ammonium and mixed. The solution A and/or the solution B properly contains an alkaline earth metal and the prepared precipitate is dried and burnt to give ceramic raw material fine powder.

26. 发明专利

JPH04245804A MANUFACTURE OF TRI-PLATE TYPE BAND PASS FILTER 失效
公开(公告)号：JPH04245804A
公开(公告)日：1992-09-02
申请号：JP2900491
申请日：1991-01-31
申请人： TDK CORP
发明人： MIURA TARO , OKAMOTO AKIRA , FURUBAYASHI MAKOTO , NINOMIYA HIDEAKI , FUJII TADAO , NAKAI SHINYA
IPC分类号： H01P1/203 , H01P3/08 , H01P11/00
摘要： PURPOSE:To obtain the desired Q value of a resonator, and to realize high selectivity. CONSTITUTION:The shape of the central conductor of each resonance circuit 5 of a tri-plate type band pass filter using multi-layer dielectric boards 3, 4 is formed of material to be heat-decomposed at temperature below sintering temperature on an unburnt dielectric sheet, and the cavity of the same form as the central conductor is formed in the inside of the dielectric by burning said constituted multi-layer dielectric sheet, and the central conductor of above- mentioned each resonance circuit is formed by forming in molten silver under pressure into said cavity.

27. 发明专利

JPH03103323A PRODUCTION OF TITANYL BARIUM OXALATE PARTICLE 失效
公开(公告)号：JPH03103323A
公开(公告)日：1991-04-30
申请号：JP23866589
申请日：1989-09-14
申请人： TDK CORP
发明人： TATEMOTO KAZUSHI , FURUBAYASHI MAKOTO
IPC分类号： C01G23/00
摘要： PURPOSE:To obtain titanyl barium oxalate particle having Ba/Ti ratio accurately controllable at an arbitrary value, in high yield, by distributing the raw materials into a mother liquor and a dropping liquid in a specific manner and dropping the dropping liquid into the mother liquor to effect the reaction of barium chloride, titanium chloride and oxalic acid. CONSTITUTION:TiCl4 is included in a mother liquor and a dropping liquid, BaCl2 is included in the dropping liquid and oxalic acid is included in the mother liquor. The charging ratio (molar ratio) is about the stoichiometric composition of BaTiO(C2O4). 4H2O and that of oxalic acid is preferably excess by about 10%. The content of Ti in the mother liquor is

28. 发明专利

JPH02214101A VOLTAGE DEPENDENT NONLINEAR RESISTANCE ELEMENT 失效
公开(公告)号：JPH02214101A
公开(公告)日：1990-08-27
申请号：JP3462489
申请日：1989-02-14
申请人： TDK CORP
发明人： MOROOKA HISAO , YANO YOSHIHIKO , FURUBAYASHI MAKOTO
IPC分类号： H01C7/10
摘要： PURPOSE:To obtain a voltage dependent nonlinear resistance element whose performance is enhanced, whose number of processes is reduced, whose yield is enhanced and whose manufacturing cost is lowered by a method wherein a resistivity of a ZnO layer composed mainly of ZnO is specified. CONSTITUTION:A varistor (a voltage dependent nonlinear resistance element) 1 is constituted of the following: a substrate (a base material) 2; a lower-part electrode 3; a ZnO layer 4 whose main component is ZnO and to which, e.g. aluminum oxide (Al2O3) has been added; a metal layer 5; an upper-part electrode 6. An amount of oxygen is changed when the ZnO layer 4 is formed; one kind selected from Al, In, Ga and B is added to the ZnO layer 4 as an oxide; its resistivity is set to 10 to 10 OMEGA.cm. Accordingly, a voltage of the varistor is variable within a prescribed range even when the ZnO layer 4 and the metal oxide layer 5 are not formed as a multilayer. Thereby, it is possible to obtain the voltage dependent nonlinear resistance element whose performance is high, whose number of processes is reduced, whose yield is enhanced and whose cost is lowered.

29. 发明专利

JPH02116615A OXIDE SUPERCONDUCTING MATERIAL 失效
公开(公告)号：JPH02116615A
公开(公告)日：1990-05-01
申请号：JP26796988
申请日：1988-10-24
申请人： TDK CORP
发明人： MARUYAMA SATORU , FURUBAYASHI MAKOTO , SAWADA HIRONOBU , WATANABE HIROSHI
IPC分类号： C04B35/00 , C01B35/00 , C01G1/00 , C01G29/00 , C04B35/45 , H01B12/00
摘要： PURPOSE:To increase the critical current density of a Bi-Sr-Ca-Cu oxide superconducting material by incorporating boron into the oxide superconducting material. CONSTITUTION:Boron is incorporated into a Bi-Sr-Ca-Cu oxide superconducting material to obtain an oxide superconducting material represented by a formula BxBiaSrbCacCudOe (where x:a=(0.005-7):1, especially (0.005-3.5):1 and a:b:c:d=1:1:1:2).

30. 发明专利

JPS63270315A PRODUCTION OF CERAMIC POWDER OF SUPERCONDUCTIVE OXIDE 失效
公开(公告)号：JPS63270315A
公开(公告)日：1988-11-08
申请号：JP10272087
申请日：1987-04-24
申请人： TDK CORP
发明人： FURUBAYASHI MAKOTO , KODAMA TAKAHIRO , WATANABE HIROSHI
IPC分类号： C01G3/00 , C01G1/00 , H01B12/00
摘要： PURPOSE:To enable production of the titled powder having high critical temperature and uniform particle size, not enlarging particles in obtaining the powder by heat treatment, by carrying out heat treatment in atmospheres of two or more stages having different oxygen partial pressure and specifying oxygen partial pressure at the final stage of temperature retention. CONSTITUTION:A raw material is prepared, falsely pressed or ground, heat- treated and ground as the final process to produce ceramic powder of superconductive oxide. The heat treatment of the operation is carried out in atmospheres of two or more stages having different oxygen partial pressure and oxygen partial pressure at the final stage of temperature retention is made

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