With Vehicle Or Suspending Agent (i.e., Slip) Patents (Class 501/20)
-
Patent number: 5714420Abstract: A ceramic enamel composition consists of an oxide frit, a bismuth silicate seed material, a pigment, and a vehicle. A preferred bismuth silicate seed material is selected from crystalline Bi.sub.12 SiO.sub.20, Bi.sub.4 (SiO.sub.4).sub.3, and Bi.sub.2 SiO.sub.5, and mixtures thereof. Upon firing a glass substrate coated with the enamel, components of the enamel adhere to the substrate. The glass can be formed with a die to a desired shape with reduced sticking of the coated region to the die. The ceramic enamel is particularly useful in providing a colored border around automotive glass, which enhances appearance and reduces degradation of adhesives by ultraviolet radiation.Type: GrantFiled: December 8, 1995Date of Patent: February 3, 1998Assignee: Cerdec Corporation - Drakenfeld ProductsInventors: George E. Sakoske, Joseph W. Ryan
-
Patent number: 5707907Abstract: An improved medium for use in preparing ceramic coating compositions. The improvement resides in the employment of pantothenol as a rheology modifier in the medium.Type: GrantFiled: February 10, 1997Date of Patent: January 13, 1998Assignee: Cerdec CorporationInventor: Terry Joseph Brown
-
Patent number: 5702996Abstract: Disclosed herein is a glass composition for insulation which comprises SiO.sub.2 and at least one of B.sub.2 O.sub.3 or K.sub.2 O in a ratio falling within the region enclosed by lines passing through point A (65, 35, 0), point B (65, 20, 15), point C (85, 0, 15) and point D (85, 15, 0) on a composition diagram for the ternary system of SiO.sub.2, B.sub.2 O.sub.3 and K.sub.2 O. The glass composition can additionally contain at least one member selected from the group consisting of Al.sub.2 O.sub.3, La.sub.2 O.sub.3, CaO, Ta.sub.2 O.sub.5 and Nd.sub.2 O.sub.3 in an amount less than 25 parts by weight for 100 parts by weight of the major constituents.Type: GrantFiled: September 27, 1996Date of Patent: December 30, 1997Assignee: Murata Mfg. Co., Ltd.Inventors: Hiromichi Kawakami, Hiroji Tani
-
Patent number: 5677251Abstract: A ceramic enamel composition is described which contains a zinc-containing oxide frit, a zinc borate seed material, a pigment, and a vehicle. The zinc borate seed material is preferably crystalline in nature, and promotes crystal growth upon firing. A preferred crystalline zinc borate seed material is selected from the phases Zn.sub.3 B.sub.2 O.sub.6 and Zn(BO.sub.2).sub.2, and mixtures thereof. Upon firing and press-forming a glass substrate coated with the enamel, components of the enamel adhere to the substrate while reducing sticking of the coated region to the forming die. The ceramic enamel is particularly useful in providing a colored border around the periphery of automotive glass and is effective in improving appearance and reducing degradation of underlying adhesives by ultraviolet radiation.Type: GrantFiled: April 25, 1996Date of Patent: October 14, 1997Assignee: Cerdec CorporationInventor: George E. Sakoske
-
Patent number: 5663109Abstract: A metal/glass paste composition with a high metal to glass ratio and a method of using the paste to adhesively connect an integrated circuit to a ceramic substrate. The glass composition consists essentially of, by weight percent on an oxide basis:about 40-65% Ag.sub.2 Oabout 15-35% V.sub.2 O.sub.5about 0-30% PbO.sub.2about 0-20% TeO.sub.2The essentially resin-free paste utilizes the glass composition described above and, for a metallized ceramic substrate, has a metal:glass ratio of from about 8:1 up to about 11.5:1. For a bare (nonmetallized) ceramic substrate, the paste has a metal:glass ratio of from about 8:1 up to about 32:1.Type: GrantFiled: May 29, 1996Date of Patent: September 2, 1997Assignee: Quantum Materials, Inc.Inventors: Raymond L. Dietz, David M. Peck
-
Patent number: 5658499Abstract: Coating compositions of silver flake suspended in predominantly aqueous vehicle is disclosed for laying down a coating of electrically conductive metal on resistive or dielectric substrates useful in the electronics industry. The coating compositions provide an ideal combination of high silver loading and low viscosity for spray painting desired thickness coatings at high speed in a single pass. The novel compositions include the three basic components: silver flake, water soluble polymer binder, water. Up to about 10 wt % of a substantially completely water soluble, organic co-solvent can be an optional, additional ingredient. The coating compositions have good green strength after drying and may be used to apply an electrically conductive base to enable electroplating plastic or elastomer parts. Optional sintering adhesives can be added to allow high temperature, permanent bonding of the silver to a ceramic substrate. The compositions can include surfactants, defoamers and antisettling agents.Type: GrantFiled: October 17, 1995Date of Patent: August 19, 1997Assignee: Heraeus, IncorporatedInventors: Jerry Irwin Steinberg, John Thomas Hochheimer, Michael Schlosser Skrzat
-
Patent number: 5650364Abstract: The present invention relates to self-opacifying enamel frit compositions that can be used for the enamelling of aluminium or aluminium alloys.Type: GrantFiled: February 20, 1996Date of Patent: July 22, 1997Assignee: Bayer AktiengesellschaftInventors: Rainer Munstedt, Marc Leveaux, Nancy Crevits, Wolfgang Podesta, Antoine Dhaese
-
Patent number: 5643841Abstract: A resistive paste comprising (a) a solid content comprising (al) a resistive material having a composition of Nb.sub.x La.sub.1-x B.sub.6-4x, wherein x is from 0.1 to 0.9 mol, and (a2) non-reducing glass frit, (b) from 1 to 10% by weight, based on the solid content, of TiO.sub.2 as a first additive, (c) from 1 to 10% by weight, based on the solid content, of at least one second additive selected from the group consisting of Co.sub.3 O.sub.4, CoO, and Fe.sub.2 O.sub.3, and (d) an organic vehicle.Type: GrantFiled: November 14, 1994Date of Patent: July 1, 1997Assignee: Murata Manufacturing Co., Ltd.Inventors: Sachiko Yamaki, Keisuke Nagata, Hiroji Tani
-
Patent number: 5637261Abstract: Mixed alkaline earth boroaluminate glasses comprising BaO combined with at least one of CaO, SrO and MgO. The glasses are useful as frit binders in aluminum nitride-compatible, thick-film paste compositions used in thick-film printing of hybrid microelectronic circuits on aluminum nitride substrates.Type: GrantFiled: November 7, 1994Date of Patent: June 10, 1997Assignee: The Curators of the University of MissouriInventor: Douglas M. Mattox
-
Patent number: 5629247Abstract: A flux composition containing as a first component:50 to 75% by weight Bi.sub.2 O.sub.3 ;15 to 25% by weight SiO.sub.2 ;4 to 10% by weight B.sub.2 O.sub.3 ;2 to 9% by weight ZnO;1 to 4% by weight alkali oxide; andoptionally as a second component a compound selected from CaO, ZrO.sub.2, MgO, SrO, Al.sub.2 O.sub.3, SnO.sub.2, TiO.sub.2, BaO, MoO.sub.3, F.sub.2 and Fe.sub.2 O.sub.3. The flux composition is typically used as a major component of a paint composition having minor portions of a pigment and liquid medium. The paint compositions are particularly suited for coating glass.Type: GrantFiled: May 8, 1996Date of Patent: May 13, 1997Assignee: The O'Hommel CompanyInventor: Robert Prunchak
-
Patent number: 5605591Abstract: The invention relates to a method for fabricating laminated glazing comprising at least one enamel layer, wherein is deposited an enamelled composition comprising an anti-adhesive frit, a medium and, optionally, a low melt point frit on a portion of the internal face of a glass sheet; the enamelled glass sheet is subjected to heat treatment at a temperature between 150.degree. C. and the glass deformation temperature, and a second glass sheet is placed on the enamelled side of the first glass sheet before simultaneous bending of the two glass sheets, final firing of the enamel taking place during bending.Type: GrantFiled: January 30, 1995Date of Patent: February 25, 1997Assignee: Saint-Gobain Vitrage InternationalInventors: Andre Beyrle, Walter Goerenz, Dieter K ustner, Wolfgang Schafer
-
Patent number: 5571455Abstract: The present invention relates to a composition for forming an electroconductive pattern excellent in electroconductivity, comprising as main components (a) an alloy powder which is obtained by cooling and finely dividing an eutectic mixture comprising 99.5%-94.5% by weight of nickel and 0.5%-5.5% by weight of boron, (b) a glass frit and (c) an organic vehicle, and a process for forming an electroconductive pattern with the composition.Type: GrantFiled: April 13, 1995Date of Patent: November 5, 1996Assignee: Dai Nippon Insatsu Kabushiki KaishaInventor: Naoshige Higuchi
-
Patent number: 5543366Abstract: A glass composition and method of use having unique crystallization and crystal remelt properties is disclosed. The glass composition consists essentially by weight percent on an oxide basis:about 40-65% Ag.sub.2 Oabout 15-35% V.sub.2 O.sub.5about 0-30% PbO.sub.2about 0-20% TeO.sub.2The present invention also contemplates a unique, essentially resin-free organic system that utilizes the novel glass composition described above and has a ratio of silver to glass (solids) of from about 3 to 1 to about 8 to 1.Type: GrantFiled: June 27, 1994Date of Patent: August 6, 1996Assignee: Quantum Materials, Inc.Inventors: Raymond L. Dietz, David M. Peck
-
Patent number: 5510301Abstract: The present invention is directed to the preparation of frit pastes suitable for sealing together preformed glass parts, being especially suitable for sealing glass panels to funnels of cathode ray tubes. The pastes comprise a mixture of frit particles, a lacquer, and at least one additive in an amount of 0.0005-2% by weight total of the lacquer. The preferred additives are selected from the group of alkyl organic phosphate esters, a mixed titanium ortho ester complexes, and substituted sorbitols in the polyol acetal family.Type: GrantFiled: October 24, 1994Date of Patent: April 23, 1996Inventors: Kimberly S. Fink, Joshua U. Otaigbe
-
Patent number: 5503777Abstract: A conductive paste includes inorganic material powders containing conductive powders and glass powders, an organic vehicle containing an organic binder and an organic solvent, and a metal organic compound.Type: GrantFiled: May 10, 1994Date of Patent: April 2, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Minehiro Itagaki, Yoshihiro Bessho, Satoru Yuhaku, Yasuhiko Hakotani, Kazuhiro Miura, Kazuyuki Okano
-
Patent number: 5504045Abstract: A paint composition containing as a major portion a flux composition including a first flux containing silica, alkali oxide, zinc oxide and boron oxide but containing no lead or lithium and optionally a second flux, and minor portions of pigment and a liquid medium, particularly suited for automobile windshields.Type: GrantFiled: October 14, 1994Date of Patent: April 2, 1996Assignee: The O. Hommel CompanyInventors: Hasan B. Emlemdi, Robert M. Koceski, Harold C. Kersteen, Robert A. Prunchak, Matthew Sgriccia
-
Patent number: 5496619Abstract: Conductive paste for via connection of a multilayer ceramic substrate, comprising: an inorganic component which consists of 30.0 to 70.0% by weight of powder of conductive material and the remainder being one of glass powder having a softening point higher than a starting point of sintering of insulating material and crystalline glass ceramic powder having a glass transition point higher than the starting point of sintering of the insulating material; and an organics vehicle component which consists of at least organic binder and solvent.Type: GrantFiled: June 6, 1994Date of Patent: March 5, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Minehiro Itagaki, Kazuyuki Okano, Suzushi Kimura, Seiichi Nakatani, Yoshihiro Bessho, Satoru Yuhaku, Yasuhiko Hakotani, Kazuhiro Miura
-
Patent number: 5494864Abstract: A resistive paste comprising (a) a mixture of a resistive material having a composition of Nb.sub.x La.sub.1-x B.sub.6-4x, wherein x is from 0.1 to 0.9 mol, and non-reducing glass frit, (b) at least one additive selected from the group consisting of B.sub.2 O.sub.3, SiO.sub.2, Al.sub.2 O.sub.3, CrB, NiB, TaSi.sub.2, and Ta in an amount of from 1 to 10% by weight based on said mixture (a), and (c) an organic vehicle, and a resistive paste comprising (a) a mixture of a resistive material having a composition of Nb.sub.x La.sub.1-x B.sub.6-4x, wherein x is from 0.1 to 0.9 mol, and non-reducing glass frit, (b) AlN in an amount of from 5 to 25% by weight based on said mixture (a), and (c) an organic vehicle. The resistive pastes provide a resistor having its temperature coefficient of resistivity shifted to the plus (+) direction in a high surface resistivity range.Type: GrantFiled: September 29, 1994Date of Patent: February 27, 1996Assignee: Murata Manufacturing Co., Ltd.Inventors: Keisuke Nagata, Hiroji Tani
-
Patent number: 5492653Abstract: Coating compositions of silver flake suspended in predominantly aqueous vehicle is disclosed for laying down a coating of electrically conductive metal on resistive or dielectric substrates useful in the electronics industry. The coating compositions provide an ideal combination of high silver loading and low viscosity for spray painting desired thickness coatings at high speed in a single pass. The novel compositions include silver flake, water soluble polymer binder, water and a substantially completely water soluble, organic co-solvent. The coating compositions have good green strength after drying and may be used to apply an electrically conductive base to enable electroplating plastic or elastomer parts. Optional sintering adhesives can be added to allow high temperature, permanent bonding of the silver to a ceramic substrate. The coating compositions have excellent storage stability such that settled solids can be redispersed readily with brief and/or mild agitation.Type: GrantFiled: November 7, 1994Date of Patent: February 20, 1996Assignee: Heraeus IncorporatedInventors: John T. Hochheimer, Jerry I. Steinberg, Michael S. Skrzat
-
Patent number: 5491118Abstract: The invention is directed to a lead-free and cadmium-free thick film paste composition suitable for forming resistor or thermistor patterns on a substrate.Type: GrantFiled: December 20, 1994Date of Patent: February 13, 1996Assignee: E. I. Du Pont de Nemours and CompanyInventor: Jacob Hormadaly
-
Patent number: 5443669Abstract: In the production of a glass laminate wherein two panes are subjected to deformation with single or double curvature, a screen-printed pattern on at least one of the panes is dried by heating below 300.degree. C. to evaporate the printing oil before the panes are stacked for deformation and simultaneously baking on the dry enamel pattern. The panes are then separated, a plastic sheet interposed and the resulting stack is bonded to form the laminate.Type: GrantFiled: August 17, 1994Date of Patent: August 22, 1995Assignee: Flachglas AktiengesellschaftInventor: Gerhard Tunker
-
Patent number: 5439852Abstract: The invention is directed to a thick film paste composition comprising electrically conductive particles and finely divided particles of a glass composition comprising by mole % 5-70% Bi.sub.2 O.sub.3, 18-35% SiO.sub.2, 0.1-40% CuO, 0.5-25% ZnO, 0.5-40% CoO, 0.5-40% Fe.sub.2 O.sub.3, and 0.5-40% MnO, which the glass composition is free of lead and cadmium, all dispersed in an organic medium.Type: GrantFiled: August 1, 1994Date of Patent: August 8, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventor: Jacob Hormadaly
-
Patent number: 5429670Abstract: An improved gold paste for use in the manufacture of ceramic circuit boards is disclosed, which has a composition comprising an inorganic component, an organic binder, a solvent. The inorganic component contains (a) 84-94 wt % powdery gold with a particle size of 0.3-0.7 .mu.m, (b) 0.3-2.0 wt % powdery V.sub.2 O.sub.5 with a particle size of 0.3-2.0 .mu.m, and (c) 0.3-2.0 wt % powdery CuO with a particle size of 0.3-2.0 .mu.m.Type: GrantFiled: February 10, 1994Date of Patent: July 4, 1995Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Akihiko Miyoshi
-
Patent number: 5421877Abstract: A ceramic color composition for coating a glass plate with the same includes first and second inorganic pigments, an optional filler, a low melting point glass frit, a resin and an oil. The total of the first and second inorganic pigments and an optional filler amounts to "A" parts by weight. The low melting point glass frit amounts to "B" parts by weight. The first and second inorganic pigments have average particle sizes ranging from 0.1 to 1.5 .mu.m and from 2 to 50 .mu.m, respectively. A ratio of "A" to the total of "A" and "B" ranges from 0.08 to 0.40. A ratio of the amount by weight of the first inorganic pigment to the total of "A" and "B" ranges from 0.05 to 0.25. A ratio of the amount by weight of the second inorganic pigment to the total of "A" and "B" ranges from 0.03 to 0.15. The ceramic color composition is substantially improved in releasability of the same from a bending press mold.Type: GrantFiled: December 17, 1993Date of Patent: June 6, 1995Assignee: Central Glass Company, LimitedInventors: Masanori Hayakawa, Keiji Ohnishi
-
Patent number: 5418193Abstract: Disclosed herein is copper paste for forming a conductive thick film, which contains 80 wt. % to 95 wt. % of spherical first copper powder of 1 .mu.m to 10 .mu.m in mean particle diameter, 0.5 wt. % to 15 wt. % of second copper powder of less than 1 .mu.m in mean particle diameter, and 1 wt. % to 15 wt. % of glass frit of 0.5 .mu.m to 2.0 .mu.m in mean particle diameter respectively as solid components. A conductive thick film obtained by applying the copper paste onto a substrate and baking the same exhibits excellent solderability as well as high adhesive strength to the substrate, and this adhesive strength is excellently maintained even if the thick film is exposed to a heat hysteresis.Type: GrantFiled: May 4, 1994Date of Patent: May 23, 1995Assignee: Murata Manufacturing Co., Ltd.Inventors: Hiroji Tani, Kazuhito Oshita, Tetsuya Ikeda
-
Patent number: 5397751Abstract: A resistive paste comprising (a) a mixture of a resistive material having a composition of Nb.sub.x La.sub.1-x B.sub.6-4x, wherein x is from 0.1 to 0.9 mol, and non-reducing glass frit, (b) at least one additive selected from the group consisting of B.sub.2 O.sub.3, SiO.sub.2, Al.sub.2 O.sub.3, CrB, NiB, TaSi.sub.2, and Ta in an amount of from 1 to 10% by weight based on said mixture (a), and (c) an organic vehicle, and a resistive paste comprising (a) a mixture of a resistive material having a composition of Nb.sub.x La.sub.1-x B.sub.6-4x, wherein x is from 0.1 to 0.9 mol, and non-reducing glass frit, (b) AlN in an amount of from 5 to 25% by weight based on said mixture (a), and (c) an organic vehicle. The resistive pastes provide a resistor having its temperature coefficient of resistivity shifted to the plus (+) direction in a high surface resistivity range.Type: GrantFiled: May 28, 1993Date of Patent: March 14, 1995Assignee: Murata Manufacturing Co., Ltd.Inventors: Keisuke Nagata, Hiroji Tani
-
Patent number: 5393465Abstract: A composition for making fired dielectric layers which is especially suitable for laser scribing consisting essentially of finely divided particles of dielectric glass, inorganic filler having a refractive index higher than the glass and cobalt oxide, all being dispersed in organic medium. The composition can be in the form of either thick film paste or green tape.Type: GrantFiled: December 13, 1993Date of Patent: February 28, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventors: Lorri P. Drozdyk, Roger H. French, Kenneth W. Hang, Arvind Halliyal
-
Patent number: 5387559Abstract: A resistive paste comprising (a) a mixture of a resistive material having a composition of Nb.sub.x La.sub.1-x B.sub.6-4x, wherein x is from 0.1 to 0.9 mol, and non-reducing glass frit, (b) at least one additive selected from the group consisting of Li.sub.2 O, MgO, CaO, TiO.sub.2, MnO.sub.2, CuO, SrO, BaO, and La.sub.2 O.sub.3 in an amount of from 1 to 10% by weight based on the mixture (a), and (c) an organic vehicle. The resistive paste provides a resistor having its temperature coefficient of resistivity shifted to the minus (-) direction according to necessity.Type: GrantFiled: May 28, 1993Date of Patent: February 7, 1995Assignee: Murata Manufacturing Co., Ltd.Inventors: Keisuke Nagata, Hiroji Tani
-
Patent number: 5378408Abstract: A screen-printable thick film paste composition suitable for forming conductive patterns on a rigid substrate comprising:(a) finely divided particles of a lead-free glass composition having a softening point log (eta)=7.6 poise from 400.degree. C.-650.degree. C., a log (eta.) specific viscosity in a range from 2 at 500.degree. C. to 5 at 700.degree. C. and consisting essentially of, by weight 65-95% Bi.sub.2 O.sub.3, 2-15% SiO.sub.2, 0.1-9% B.sub.2 O.sub.3, 0-5% Al.sub.2 O.sub.3, 0-5% CaO, and 0-20% ZnO; and(b) electrically conductive particles; andall of (a) and (b) being dispersed in (c) an organic medium.Type: GrantFiled: July 29, 1993Date of Patent: January 3, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventors: Alan F. Carroll, Kenneth W. Hang
-
Patent number: 5376596Abstract: A conductive paste contains at least a conductive powder and a glass frit. The glass frit includes 9.0 to 45.0 wt % of SiO.sub.2 and 1.0 to 18.5 wt % of CaO, the balance being ZnO, B.sub.2 O.sub.3 and Li.sub.2 O. The glass frit may contain not more than 6.0 wt % of Al.sub.2 O.sub.3 incorporated therein as additive.Type: GrantFiled: August 4, 1993Date of Patent: December 27, 1994Assignee: Murata Manufacturing Co., Ltd.Inventors: Yu Tokuda, Kunihiko Hamada
-
Patent number: 5366935Abstract: There is disclosed a passivating coating composition suitable for application as a collar to metal oxide varistor valve block cylindrical surfaces comprising a mixture of 64-74 parts by weight of a glass powder, 22-35 parts by weight of water, and 0.5-2 parts by weight of an additive comprising fumed silica, clay and urea.Type: GrantFiled: March 14, 1994Date of Patent: November 22, 1994Assignee: Hubbell IncorporatedInventors: Mohammad A. Alim, Karen C. Beal
-
Patent number: 5346651Abstract: Silver-containing conductive coatings are provided. The coatings are prepared from compositions comprising silver particulate material, a low firing lead-free glass frit and a liquid organic vehicle. The composition is coated on a substrate and fired to fuse the silver-containing conductive coating to the substrate. The coatings find particular use in the field of automotive backlights. The coatings are of special value in eliminating solder wet through migration.Type: GrantFiled: August 31, 1993Date of Patent: September 13, 1994Assignee: Cerdec CorporationInventors: Joanna Oprosky, David Stotka
-
Patent number: 5338708Abstract: A thick composition comprising a mixture of: (a) 30-80% wt. finely divided particles of palladium powder having a surface area of 3-10 square meters/gm and density of 0.5-0.7 grams/cc; (b) 2-10% wt. finely divided particles of a refractory inorganic binder; all of A and B being dispersed in (c) 68-10% wt. of an organic medium; wherein the firing temperature of the composition is from 800.degree.-950.degree. C. This thick film composition is useful for forming detector electrodes within hydrogen sensors.Type: GrantFiled: December 20, 1993Date of Patent: August 16, 1994Assignee: E. I. du Pont de Nemours and CompanyInventor: John J. Felten
-
Patent number: 5334558Abstract: A glass composition and method of use having unique crystallization and crystal remelt properties is disclosed. The glass composition consists essentially by weight percent on an oxide basis:about 40-65% Ag.sub.2 Oabout 15-35% V.sub.2 O.sub.5about 0-30% PbO.sub.2about 0-20% TeO.sub.2The present invention also contemplates a unique, essentially resin-free organic system that utilizes the novel glass composition described above.Type: GrantFiled: October 19, 1992Date of Patent: August 2, 1994Assignee: Diemat, Inc.Inventors: Raymond L. Dietz, David M. Peck
-
Patent number: 5326728Abstract: This invention is directed to the production of lead-free enamels containing finely-divided glass particles, finely-divided pigment particles, and an organic binder wherein the glass particles consist essentially, expressed in terms of weight percent on the oxide basis, of______________________________________ SiO.sub.2 35-50 Li.sub.2 O + Na.sub.2 O + K.sub.2 O <8 B.sub.2 O.sub.3 23-30 CaO 1-5 Al.sub.2 O.sub.3 10-22 CaO + MgO + ZnO + BaO + SrO <7 Li.sub.2 O 1-3 TiO.sub.2 0-2 Na.sub.2 O 0-3 ZrO.sub.2 0-5 K.sub.2 O 2-5 ______________________________________said glass having a softening temperature T.sub.L above 650.degree. C. and thermal expansion coefficient below 60.times.10.sup.-7 /.degree.C. Among other applications, said glass can be used for the decoration of low-expansion glass-ceramic cooking plates.Type: GrantFiled: October 12, 1993Date of Patent: July 5, 1994Assignee: Corning IncorporatedInventors: Gerard R. M. Boury, Daniel L. G. Ricoult
-
Patent number: 5302557Abstract: Thick film paste composition for applying conductive patterns to automotive window glass comprising finely divided particles of metallic silver, glass frit having transition metal oxide, contained in the glass, all of the particulate solids being dispersed in an organic medium.Type: GrantFiled: December 3, 1991Date of Patent: April 12, 1994Assignee: E. I. du Pont de Nemours and CompanyInventors: Alan F. Carroll, Hideaki Kuno
-
Patent number: 5300324Abstract: The drying rate of glazes containing water used to coat ceramic articles is increased by addition of aminoethylethanolamine, one or more polyalkylene polyamines with or without a small amount of a styrene-butadiene latex.Type: GrantFiled: May 29, 1992Date of Patent: April 5, 1994Assignee: The Dow Chemical CompanyInventors: Alan P. Croft, Byford D. Sheffield
-
Patent number: 5296414Abstract: A crystallizable low melting glass consisting essentially of PbO, ZnO, B.sub.2 O.sub.3, GeO.sub.2 and optionally SiO.sub.2, SnO.sub.2 and a metal oxide colorant.Type: GrantFiled: December 23, 1992Date of Patent: March 22, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventors: Seiichi Nakagawa, Kuninori Okamoto, Barry E. Taylor, Motohiko Tsuchiya
-
Patent number: 5258335Abstract: A low dielectric, low temperature fired glass ceramic produced by firing at about 800.degree.-900.degree. C. a mixture comprising at least one glass consisting of, by weight percent, 0 to 50% B.sub.2 O.sub.3, 35 to 65% CaO, and 10 to 65% SiO.sub.2, and selected from the glasses of CaO-B.sub.2 O.sub.3 -SiO.sub.2 glass system. The glass ceramic is light weight, exhibits a dielectric constant of less than about 7.9, has adequate mechanical strength and thermal conductivity, and is compatible with precious metal conductors. The glass ceramic is useful in the manufacture of integrated circuits and any other electronic or mechanical components where a glass ceramic exhibiting this particular combination of characteristics is suitable.Type: GrantFiled: February 19, 1992Date of Patent: November 2, 1993Assignee: Ferro CorporationInventors: S. K. Muralidhar, Gordon J. Roberts, Aziz S. Shaikh, David J. Leandri, Dana L. Hankey, Thomas J. Vlach
-
Patent number: 5252521Abstract: This invention relates to a lead-free glass coating made by firing a lead-free glass composition comprising in weight percent from about 35% to about 77% of bismuth oxide, from about 10% to about 33% of boron oxide, and from about 10% to about 32% of zinc oxide at a temperature sufficient to fuse and cure the glass composition. The invention also relates to lead-free glazes and enamels that exhibit excellent acid resistance, possess low coefficients of linear or thermal expansion, and moderate maturation temperatures.Type: GrantFiled: October 19, 1992Date of Patent: October 12, 1993Assignee: Ferro CorporationInventor: Gordon J. Roberts
-
Patent number: 5250475Abstract: Black glass pastes for edging glass windows in automobiles comprise ground, lead-containing modified borosilicate glass which has sulfides or polysulfide fused therein, black ground pigment and a carrier medium which is liquid at room temperature or higher, is produced by fusing a mixture of lead-containing borosilicate glass, powdered carbon and metal sulfides an sulfur powder or the resulting frit together with black pigments to a particle fineness of less than 10 .mu.m and mixing the ground product with a carrier medium which is liquid at room temperature or elevated temperature, thereby forming a paste.Type: GrantFiled: March 9, 1992Date of Patent: October 5, 1993Assignee: Bayer S.p.A.Inventors: Paul Zybell, Ruggero Bertocchi
-
Patent number: 5244601Abstract: Resistor composition to produce thick film resistors, preferably the resistor films in sensors for temperature measurement, includes glass frit and an oxide which is at least one of CaCu.sub.3 Ru.sub.4 O.sub.12 and LaCu.sub.3 Ru.sub.4 O.sub.12.Type: GrantFiled: December 10, 1990Date of Patent: September 14, 1993Assignee: W. C. Heraeus GmbHInventors: Hans-Georg Burckhardt, Frieder Gora, Karl-Heinz Guldner, Jurgen Dehoust, Christina Modes, Joachim Schmidt, Rainer Kiemel, Sybille Kemmler-Sack
-
Patent number: 5238881Abstract: A colored ceramic glaze is prepared from a raw glaze containing glass frit, clay and one or more ceramic pigments added as an aqueous dispersion. The raw glaze is ball-milled after which it is blended with the aqueous dispersion. The dispersion contains up to 70% of a ceramic pigment, such as zirconium-vanadium yellow, preferably with 1% to 3% of a suspending agent, up to about 1.5% of a thickener, an effective amount, but no more than 1% of a dispersant, and a biocide as needed. The suspending agent preferably is attapulgite clay or a water-swellable smectite clay. The thickener is preferably a xanthan gum and the dispersant is typically an ammonium salt of a medium molecular weight polymethacrylic acid. A stronger, more intense color is achieved by adding the ceramic pigment as a dispersion as opposed to ball-milling it with the glass frit as has been the traditional approach.Type: GrantFiled: November 9, 1988Date of Patent: August 24, 1993Assignee: Engelhard CorporationInventor: Jeffrey J. Norris
-
Patent number: 5221644Abstract: Disclosed is a thick film sense resistor composition containing palladium and silver in a weight ratio of about 56/44 to about 60/40 and a specific glass frit composition so that the sense resistor achieves low resistivity and controlled TCR.Type: GrantFiled: December 13, 1991Date of Patent: June 22, 1993Assignee: Delco Electronics CorporationInventors: Carl W. Berlin, Dwadasi H. R. Sarma
-
Patent number: 5208191Abstract: The present invention provides a new and useful enamel composition and method of using the same for producing an enamel finish on a formed section of glass. The enamel composition partially crystallizes upon heating, thereby helping to prevent the forming and handling equipment from sticking and/or adhering to the composition during the forming operation. The enamel composition includes a crystallizable glass frit portion and a seed powder. The crystallized glass frit portion includes precursors from which Zn.sub.2 SiO.sub.4 can be crystallized upon firing of the enamel composition. The seed powder causes at least a portion of the precursors to crystallize upon firing such that during firing at least a part of the crystallizable glass frit yields crystallized Zn.sub.2 SiO.sub.4. The enamel composition also preferably includes bismuth oxide (Bi.sub.2 O.sub.3) in order to help further ensure that no sticking and/or adhering problems develop during the forming operation.Type: GrantFiled: November 27, 1991Date of Patent: May 4, 1993Assignee: Ferro CorporationInventors: Clifford G. Ruderer, Robert C. Stroup, George C. Korn
-
Patent number: 5196381Abstract: A low-K crystallizable glass composition having a softening point of 550.degree.-800.degree. C., consisting essentially of mole % of:41-70% P.sub.2 O.sub.5 ;10-48% MgO, ZnO or mixtures thereof;2-20% Al.sub.2 O.sub.3, Cr.sub.2 O.sub.3 or mixtures thereof;0-10% alkali metal oxide(s);0-10% CaO, SrO, BaO or mixtures thereof;0-10% SiO.sub.2 ;0-20% B.sub.2 O.sub.3 ;0-10% ZrO.sub.2, TiO.sub.2 or mixtures thereof; and0-10% Fe.sub.2 O.sub.3, with the provisos that:(i) a=n(b+3c+d+e+2f+3g), wherein n=0.8-1.0, anda=mole % P.sub.2 O.sub.5 ;b=mole % MgO, ZnO or mixtures thereof;c=mole % Al.sub.2 O.sub.3, Cr.sub.2 O.sub.3 or mixtures thereof;d=mole % M.sub.2 O, where M=Na, K, Rb, Cse=mole % M'O, where M'=Ca, Sr, Baf=mole % ZrO.sub.2, TiO.sub.2 or mixtures thereof;g=mole % Fe.sub.2 O.sub.3, (where Ln is any of the rare earth elements), or mixtures thereof;(ii) the total amount of alkali oxides, CaO, SrO, and BaO does not exceed 10 mole %;(iii) the total amount of ZrO.sub.2, TiO.sub.2, and Fe.sub.2 O.sub.Type: GrantFiled: January 16, 1990Date of Patent: March 23, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventors: Yung-Haw Hu, Michael A. Saltzberg, Robert D. Shannon
-
Patent number: 5179046Abstract: A fusion sealing material containing a mill addition, a sealing tape cast from the material, and a method of producing the tape. The material is composed of a low temperature glass, a mill addition that lowers the effective coefficient of thermal expansion of the glass in a seal and an organic medium. The sealing tape is prepared by hot mixing the solids with a liquefied medium, such as a high melting alcohol, and casting the hot mix onto a cold sheet to immediately solidify the medium.Type: GrantFiled: October 7, 1991Date of Patent: January 12, 1993Assignee: Corning IncorporatedInventors: Gaylord L. Francis, Ronald E. Johnson
-
Patent number: 5176853Abstract: Compositions useful for printing controllable adhesion conductive patterns on a printed circuit board include finely divided copper powder, a screening agent and a binder. The binder is designed to provide controllable adhesion of the copper layer formed after sintering to the substrate so that the layer can lift off the substrate in response to thermal stress. Additionally, the binder serves to promote good cohesion between the copper particles to provide good mechanical strength to the copper layer so that it can tolerate lift off without fracture.Type: GrantFiled: January 17, 1989Date of Patent: January 5, 1993Assignee: Delco Electronics CorporationInventors: Dwadasi H. R. Sarma, Ponnusamy Palanisamy, John A. Hearn, Dwight L. Schwarz
-
Patent number: 5173457Abstract: A thick film dielectric paste for giving fine lines and vias comprises a low permittivity borosilicate or aluminoborosilicate dielectric material of particle size less than 5 .mu.m, together with a medium. The dielectric material sinters at from 600.degree. C. to 1100.degree. C. and is preferably made by sol-gel techniques. Relatively low sintering temperatures can be combined with low permittivity.Type: GrantFiled: November 16, 1990Date of Patent: December 22, 1992Assignee: Johnson Matthey Public Limited CompanyInventor: Gary P. Shorthouse
-
Patent number: RE34982Abstract: Low-expansion devitrifying glass compositions exhibiting a negative-slope temperature coefficient of expansion over a temperature range from about 125.degree. C. to about 500.degree. C. are useful for the fabrication of thick film copper via-fill inks of multilayer printed-circuit boards.Type: GrantFiled: January 4, 1994Date of Patent: June 27, 1995Assignee: David Sarnoff Research Center, Inc.Inventors: Ashok N. Prabhu, Kenneth W. Hang