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公开(公告)号：DE69527185T2
公开(公告)日：2003-01-30
申请号：DE69527185
申请日：1995-11-20
Applicant: MATSUSHITA ELECTRIC IND CO LTD
Inventor： OKUYAMA KOJIRO , SHIMOYAMA KOJI , KAWASHIMA SYUNICHIRO , KUGIMIYA KOICHI
Abstract: The present invention provides dielectric ceramics with less variation of temperature coefficient at a resonant frequency due to heating history during the sintering of ZrTiO4 and ZrO2 - SnO2 - TiO2 ceramics, and having a high unloaded Q value and a high dielectric constant, and a temperature coefficient at a resonant frequency which is widely variable as desired, and dielectric resonators using the dielectric ceramics which have a high unloaded Q value and a strong electrode layer. The main components of the dielectric ceramics (2) and (5) may be expressed by the formula: xZrO2 - yTiO2 - zA(1+u)/3B(2-u)/3O2 wherein A denotes at least one component selected from the group (A) consisting of Mg, Co, Zn, Ni and Mn, B denotes at least one component selected from the group (B) consisting of Nb and Ta, and x, y, z and u (x, y and z are molar fractions and u is a value within the range from 0 to 1.90) have the relation of x + y + z = 1.0, 0.10
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公开(公告)号：DE69128608D1
公开(公告)日：1998-02-12
申请号：DE69128608
申请日：1991-10-30
Applicant: MATSUSHITA ELECTRIC IND CO LTD
Inventor： NISHIDA MASAMITSU , ANDO HAMAE , KUGIMIYA KOICHI
Abstract: In an agitating mill for producing the objective fine powder, the agitating medium having an average particle diameter of no more than 0.6mm is charged in an annular gap (3) between the external side wall of the agitator (2) and the internal side wall of the milling vessel (1). Thereby the agitator (2) can be rotated at a peripheral speed of no less than 30m/s, and it results in a high grinding rate and reduced amount of impurity which means worn-out grinding media included in the objective fine powder.
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公开(公告)号：DE69031250D1
公开(公告)日：1997-09-18
申请号：DE69031250
申请日：1990-06-07
Applicant: MATSUSHITA ELECTRIC IND CO LTD
Inventor： KUGIMIYA KOICHI , SUGAYA YASUHIRO , INOUE OSAMU , HIROTA KEN , SATOMI MITSUO
Abstract: A magnetic material is provided which includes a discrete phase including grains made of a first substance which comprises a magnetic metal; and a continuous phase including a thin coating film made of a second substance which comprises a dielectric or insulating substance. The thin coating film is formed on the surface of the grains and has a mean thickness smaller than the mean particle size of the grains. The grains are separated substantially from each other by the thin coating film.
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公开(公告)号：DE69309503D1
公开(公告)日：1997-05-15
申请号：DE69309503
申请日：1993-01-14
Applicant: MATSUSHITA ELECTRIC IND CO LTD
Inventor： INOUE OSAMU , MATSUTANI NOBUYA , KUGIMIYA KOICHI , ISHII OSAMU , AONO YASUYUKI
IPC: C04B35/26
Abstract: An oxide magnetic material provided by the present invention contains, as main components, 61 to 67 mol% of Fe2O3; 3 to 36 mol% of MnO; and 30 mol% or less of ZnO, and further contains, as sub-components, 0.05 to 0.5 wt% of CaO; and 0.005 to 0.2 wt% of SiO2. Such materials can further contain one or more kinds of oxides selected from the group consisting of ZrO2, HfO2, Ta2O5, Cr2O3, MoO3, WO3, Al2O3, Ga2O3, In2O3, GeO2, SnO2, Sb2O3 and Bi2O3. Such magnetic materials of the present invention have the advantages of having an extremely low magnetic loss even when used in the high frequency band and having a minimum magnetic loss at a temperature sufficiently higher than room temperature. Moreover, a switching power supply having a switching frequency of 300 kHz to 5 MHz is provided by using such magnetic materials as a magnetic core.
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公开(公告)号：DE69125121D1
公开(公告)日：1997-04-17
申请号：DE69125121
申请日：1991-12-20
Applicant: MATSUSHITA ELECTRIC IND CO LTD
Inventor： YOKOTANI YOICHIRO , ANDO HAMAE , KUGIMIYA KOICHI
Abstract: The ceramic substrate for electronic circuit of the present invention comprises a ceramic layer and a conductive layer which is patterned on the ceramic layer, wherein the conductive layer comprises copper or an alloy containing copper as its main component. The ceramic layer entirely comprises a complex oxide or an oxide solid solution containing copper element and at least one component excluding copper element. Moreover, the ceramic layer is insulated.
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Patent Agency Ranking
公开(公告)号：DE69116415T2
公开(公告)日：1996-08-14
申请号：DE69116415
申请日：1991-04-18
Applicant: MATSUSHITA ELECTRIC IND CO LTD
Inventor： FUJIMARU TAKUYA , NISHIDA MASAMITSU , KUGIMIYA KOICHI
IPC: C04B35/495 , H01B3/12 , H01L23/15 , C04B35/00
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公开(公告)号：DE69022668T2
公开(公告)日：1996-05-23
申请号：DE69022668
申请日：1990-06-15
Applicant: MATSUSHITA ELECTRIC IND CO LTD
Inventor： YOKOTANI YOICHIRO , NAKATANI SEIICHI , KUGIMIYA KOICHI
Abstract: An improved electronic device has metal-grazing type end terminations comprising a surface metal phase which is made of Cu and/or Ni alloy containing at least one of Pb, Su and Zn, by sintering a paste material containing a matrix metal powder (Cu and/or Ni), a fluxing metal powder (Pb, Sn and/or Zn), an inorganic bonding material powder and an organic binding material, so that the surface portion serves to improve a wettabilty and a solderability of the end termination owing to its composition similar to a solder.
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公开(公告)号：DE68918417D1
公开(公告)日：1994-10-27
申请号：DE68918417
申请日：1989-12-04
Applicant: MATSUSHITA ELECTRIC IND CO LTD
Inventor： KUGIMIYA KOICHI
Abstract: Provided is a magic mirror device comprising a substrate having a front surface which is mirror-finished while having slight recesses and a rear surface having no protrusion on which nicked marks are formed in stead of protrusions, wherein the thickness of the substrate is less than 10 mm while the depth of nicked marks are less than 20 mu m, thereby it is possible to precisely read a latent image on the mirror-finished front surface thereof upon irradiation of light onto the front surface.
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公开(公告)号：DE2330290A1
公开(公告)日：1974-01-10
申请号：DE2330290
申请日：1973-06-12
Applicant: MATSUSHITA ELECTRIC IND CO LTD
Inventor： KUGIMIYA KOICHI , HIROTA EIICHI
Abstract: This invention provides a magnetic head constituted by a magnetic core having a winding wound thereon, the magnetic core being a ferrite body composed of crystallites which have (111)-crystallographic planes thereof oriented substantially parallel with each other. The ferrite body is a dense polycrystalline and has much improved wear characteristics. The method of manufacturing the polycrystalline ferrite body includes the steps of mixing starting materials which include an alpha -Fe2O3 powder with particles having a thin disc shape and other compounds in the weight ratio of given ferrite composition, cold-pressing the mixture into a cold-pressed body by a uniaxial pressure and sintering the cold-pressed body into a solid body so that the crystallites of the sintered body have the (111) 111)-planes substantially oriented.
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公开(公告)号：DE69029059D1
公开(公告)日：1996-12-12
申请号：DE69029059
申请日：1990-06-07
Applicant: MATSUSHITA ELECTRIC IND CO LTD
Inventor： KUGIMIYA KOICHI , HIROTA KEN , SATOMI MITSUO
IPC: C04B35/628 , B22F1/02 , B22F3/10 , C04B35/111 , C04B35/645 , C22C29/00 , C22C32/00 , G11B5/31 , H05K1/05 , C04B35/10 , C04B35/64
Abstract: A substrate made of a composite material is provided which includes a discrete phase including grains (1) made of a first substance; and a continuous phase (2) including a thin coating film made of a second substance and formed on the surface of the grains. The thin coating film has a mean thickness smaller than the mean particle size of the grains. The grains are separated substantially from each other by the thin coating film. The porosity of the composite material is 5% or less.
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