Assignee: Narumi China Corporation

Location: Nagoya, JP
No. of patents: 19

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Number	Title	Issue Date
6428880	Paste gold and golden ornaments A gold paste for painting glass or a ceramic, exhibits gold color by being sintered. The gold paste comprises metal components having a metal composition within the following range: gold 82.0-99.1% by weight, bismuth 5.0-0.4% by weight, silicon 3.0-0.2% b...	08/06/2002
6176769	Ceramics dress substrate and method of using the dress substrate A ceramics dress substrate of the present invention capable of both performances of cutting a cut material with a high accuracy and dressing a diamond cutting grindstone with an excellent cutting property and an reduced wearing amount of the grindstone. T...	01/23/2001
5362687	Lead-free frit glaze A lead-free frit glaze consisting of, by mole %, 61% or greater SiO2, 8-10% Al2 O3, 0.1-3% CaO, 0.1-2% MgO, 2-5% Li2 O, 1-4% K2 O, 2-6% Na2 O, and 10-15% B2 O3. The glaze i...	11/08/1994
5013695	Dielectric ceramic composition A dielectric ceramic composition consisting essentially of barium oxide, titanium oxide, neodymium oxide and gadolinium oxide and which is expressed by the formula: aBaO-bTiO2 -c[(1-X)Nd2 O3 -XGd2 O3 ] whe...	05/07/1991
4843038	Black sintered body of aluminum nitride and process for producing the same Black sintered bodies of aluminum nitride are produced by adding a sintering aid selected from the group consisting of (a) an oxide mixture of calcium oxide and at least one of tungsten oxide and molybdenum oxide, (b) an oxide containing calcium and at le...	06/27/1989
4833108	Sintered body of aluminum nitride Sintered bodies of aluminum nitride are produced by adding, as a sintering aid, an oxide mixture consisting essentially of calcium oxide, yttrium oxide and one or more oxides of tungsten oxide and molybdenum oxide or a mixture of compounds (precursors) ca...	05/23/1989
4824813	Dielectric ceramic composition A dielectric ceramic composition consisting essentially of a BaO-TiO2 -WO3 ternary system wherein molar percentages of BaO, TiO2 and WO3 are within the range enclosed by a line joining the points of A(21.5, 78.5...	04/25/1989
4795670	Multilayer ceramic substrate with circuit patterns A multilayer ceramic substrate with multilayered circuit patterns, the improvement in which internal conductors for wiring are formed by a Ag base conductive materials capable of being co-fired with multilayered green ceramic substrate sheets in an oxidiz...	01/03/1989
4753906	Dielectric ceramic composition for microwave application A dielectric ceramic composition for microwave applications having the formula ##EQU1## wherein x, y and z are molar percentages and 10ࣘxࣘ22, 58ࣘyࣘ80 and 8ࣘzࣘ22, O	06/28/1988
4749665	Low temperature fired ceramics Partially crystallized ceramic articles is prepared by firing at low temperatures of 800° to 1100° C., a mixture consisting essentially of, (a) 40 to 50 wt. % of powdered, noncrystalline glass consisting essentially of 10 to 55 wt. % of at least one sel...	06/07/1988
4749669	Dielectric ceramic composition A dielectric ceramic composition comprising a ternary system composition represented by the formula, aBaO.bTiO2.cWO.sub.3 (wherein a, b and c are percent molar fractions totaling 100, i.e., a+b+c=100; 17ࣘaࣘ21.5; 75ࣘbࣘ83 and 0.1ࣘcࣘ5)...	06/07/1988
4748085	Multilayer ceramic circuit board fired at a low temperature In a multilayer ceramic circuit board comprising a substrate, an insulating layer on the substrate, and a conductive pattern on the insulating layer, an additive of Cr2 O3 or MnO2 is added to the insulating layer to reinfo...	05/31/1988
4680618	Package comprising a composite metal body brought into contact with a ceramic member In a package comprising a ceramic member so as to accommodate a semiconductor device, a composite metal body which comprises copper and either one of tungsten and molybdenum is brought into contact with the ceramic member. The composite metal body is prov...	07/14/1987
4650923	Ceramic article having a high moisture proof In an article comprising a ceramic body fired at a comparatively low temperature and a circuit pattern attached to the body, the ceramic body is produced from a preselected composition comprising first powder of alumina and second powder of a vitreous mat...	03/17/1987
4621066	Low temperature fired ceramics Low temperature fired ceramics produced by firing at a low temperature a mixture consisting of, in weight percentages: (a) 50 to 65% of powder glass consisting of 10 to 55% of CaO, 45 to 70% of SiO2, 0 to 30% of Al2 O3 and up t...	11/04/1986
4496509	Method of producing ceramic tapes A method of preparing green ceramic tapes, comprising adding to 100 parts by weight of a fine ceramic powder, 2 to 15 parts by weight, in terms of its resin content, of a binder mixture consisting of an aqueous polyurethane and a water-soluble acrylic res...	01/29/1985
4353958	Green ceramic tapes and method of producing them Green ceramic tapes are prepared which comprise a finely divided ceramic powder and a water-compatible polyurethane resin binder. The green tapes are prepared by casting a water-based slip containing the ceramic powder and the water-compatible polyurethan...	10/12/1982
4326095	Casing comprising a barrier for intercepting alpha particles from a sealing layer A casing for a semiconductor memory chip comprises a barrier intercepting a limited space that envelopes lines of vision between an exposed surface of the chip and an inside end surface of a sealing layer for hermetically sealing a cap and a base member o...	04/20/1982
4323405	Casing having a layer for protecting a semiconductor memory to be sealed therein against alpha particles and a method of manufacturing same A hermetic cap member of a casing for a semiconductor memory element is provided with a protection layer on a recessed surface facing the memory element. The protection layer is of at least one material which does not emit alpha particles and has a thickn...	04/06/1982

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Assignee: Narumi China Corporation