And Zinc Patents (Class 501/76)
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Patent number: 5358666Abstract: An ohmic electrode material for semiconductor ceramics comprises 48-96 weight % of aluminum and 4-52 weight % of silicon. A semiconductor ceramics element includes a semiconductor ceramics such as that of barium titanate system semiconductor ceramics and on the surface of the semiconductor ceramics is formed an ohmic electrode from the ohmic electrode material.Type: GrantFiled: October 4, 1993Date of Patent: October 25, 1994Assignee: Murata Manufacturing Co., Ltd.Inventor: Kiyomi Sasaki
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Patent number: 5281561Abstract: A low temperature sealing glass composition suitable for sealing integrated circuit alumina packages at temperatures below 400.degree. C. in a short time of about ten minutes. This sealing glass composition is a mixture of a glass powder and 1 to 50% (by weight) of one or more low expansion ceramic powders. The glass powder comprises a lead borate or lead zinc borate glass and the joint addition of Cu.sub.2 O, Tl.sub.2 O and F in a range of 6.3 to 20% (by weight) wherein the molar ratio of Cu to Tl to F is in the range between 0.8 Cu: 0.8 Tl: 0.8 F to 1.2 Cu: 1.2 Tl: 1.2 F. The glass in powder form is blended with one or more compatible low expansion ceramic powders including cordierite, zircon, willemite, lead titanate or modified tin oxide.Type: GrantFiled: February 9, 1993Date of Patent: January 25, 1994Inventors: Maurice E. Dumesnil, Leo Finkelstein
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Patent number: 5256606Abstract: The present invention relates to a moisture resistant low melting point glass composition for a magnetic head and a magnetic head utilizing it. Said glass composition may be composed of 28-35% PbO, 38-50% SiO.sub.2, 3-10% R.sub.2 O, 3-8% TeO.sub.2, and 1-5% TiO.sub.2 in terms of mole ratio, or 30-40% PbO, 30-40% SiO.sub.2, 10-20% B.sub.2 O.sub.3, 8% or less TeO.sub.2 and 10% or less Bi.sub.2 O.sub.3, cr 30-40% PbO, 30-40% SiO.sub.2, 10-20% B.sub.2 O.sub.3, and 0-8% TeO.sub.2, or 30-40% PbO, 30-40% SiO.sub.2, 10-20% B.sub.2 O.sub.3, and 0-10% Bi.sub.2 O.sub.3.Type: GrantFiled: May 28, 1992Date of Patent: October 26, 1993Assignee: Alps Electric Co., Ltd.Inventor: Satoshi Maki
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Patent number: 5224001Abstract: A magnetic head comprising magnetic core halves which are sealed with a sealing glass which consists essentially of 10 to 25% by weight of SiO.sub.2, 55 to 80% by weight of PbO, 1 to 15% by weight of CdO, 0 to 10% by weight of B.sub.2 O.sub.3, 0 to 5% by weight of ZnO, 0 to 5% by weight of Al.sub.2 O.sub.3, 0 to 5% by weight of Na.sub.2 O, and 0 to 10% by weight of K.sub.2 O, provided that a total content of Na.sub.2 O and K.sub.2 O does not exceed 10% by weight, has a coefficient of thermal expansion of from 90.times.10.sup.-7 /.degree. C. to 110.times.10.sup.-7 /.degree. C. in a temperature range between 30.degree. C. and 300.degree. C., a working temperature of 600.degree. C. or lower and water resistance of the second class or higher, which glass is not deeply colored and is not devitrified during the assembly of the magnetic head.Type: GrantFiled: April 6, 1992Date of Patent: June 29, 1993Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuo Mizuno, Masaki Ikeda, Akihiko Yoshida
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Patent number: 5204290Abstract: The invention relates to crystallized glass that can be used with various electronic components such as magnetic heads and the like as bonding or sealing glass. This crystallized glass comprises, in % by weight, at least 11-17% of SiO.sub.2, 7-10% of B.sub.2 O.sub.3, 30-55% of PbO, 1-3% of CdO, 5-10% of A.sub.2 O (A stands for a kind of alkali metal), 7-35% of ZnO and 0-10% of ZrO.sub.2 with the sum of ZnO and ZrO.sub.2 not exceeding 35%, and has the characteristics of 550.degree.-600.degree. C. as the working temperature, (80-100).times.10.sup.-7 /.degree.C. as the thermal expansion coefficient, 550.degree. C. or more as the thermal expansion coefficient, and 550.degree. C. or more as the glass transition point after working.Type: GrantFiled: December 18, 1991Date of Patent: April 20, 1993Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuo Mizuno, Masaki Ikeda
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Patent number: 5179047Abstract: A hermetic sealing glass composition comprising an inorganic component which consists essentially of from 60 to 100 wt % of a glass powder, from 0 to 30 wt % of a filler and from 0 to 10 wt % of a pigment, wherein said glass powder consists essentially of from 30 to 45 wt % of SiO.sub.2, from 11 to 25 wt % of Al.sub.2 O.sub.3, from 11 to 25 wt % of ZnO, from 11 to 25 wt % of B.sub.2 O.sub.3, from 0.05 to 10 wt % of ZrO.sub.2, from 0.1 to 10 wt % of at least one of La.sub.2 O.sub.3, from 0.1 to 7 wt % of BaO, SrO, or CaO+MgO, from 0.1 to 7 wt % of at least one Li.sub.2 O, +Na.sub.2 or K.sub.2 O, from 0.1 to 5 wt % of at least one CeO.sub.2, +TiO.sub.2 or SnO.sub.2, from 0 to 5 wt % of PbO and from 0 to 5 wt % of at least one metal oxide selected from the group consisting of oxides of Co, Ni, Cr, Mn, Fe and Cu.Type: GrantFiled: March 25, 1991Date of Patent: January 12, 1993Assignee: Asahi Glass Company Ltd.Inventor: Jiro Chiba
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Patent number: 5137850Abstract: A chemically resistant glass which can be produced at relatively low melting temperatures and has anomalous negative partial dispersion P.sub.g,F, a refractive index n.sub.d of from 1.73 to 1.83 and an Abbe coefficient v.sub.d of from 31 to 38 preferably contains (in % by weight, based on oxides):______________________________________ 0-4 SiO.sub.2 + GeO.sub.2 0-2 GeO.sub.2 0-10 MgO 26-33 B.sub.2 O.sub.3 0-1 Li.sub.2 O 0-16 CaO 19-50 PbO 0-1 Na.sub.2 O 0-16 BaO 1-6 ZrO.sub.2 0-1 K.sub.2 O 0-16 SrO 4-16 Ta.sub.2 O.sub.5 0-2 .SIGMA. alkaline earth 0-6 Al.sub.2 O.sub.3 metal oxides 0-16 ZnO 0-4 TiO.sub.2 1.5-20 .SIGMA. alkaline earth metal oxides + ZnO 0-1 WO.sub.3 0-11 La.sub.2 O.sub.3 0-7 Nb.sub.2 O.sub.5 0-5.5 Y.sub.2 O.sub.3 0-5.5 Gd.sub.2 O.sub.3 4-11 .SIGMA. La.sub.2 O.sub.3 + Y.sub.2 O.sub.3 + Gd.sub.2 O.sub.3 ______________________________________with the proviso that the .SIGMA.(SiO.sub.2 +GeO.sub.2 +B.sub.2 O.sub.3)/.SIGMA.(ta.sub.2 O.sub.5 +ZrO.sub.2 +HfO.sub.2) ratio is less than 5 and the PbO/.Type: GrantFiled: January 16, 1991Date of Patent: August 11, 1992Assignee: Schott GlaswerkeInventors: Marc Clement, Volkmar Geiler, Danuta Grabowski
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Patent number: 5137851Abstract: A crystallizable glass composition comprising PbO and/or Bi.sub.2 O.sub.3, ZnO, B.sub.2 O.sub.3, Cr.sub.2 O.sub.3, SnO.sub.2 and optionally SiO.sub.2 and/or Al.sub.2 O.sub.3, having an optical density parameter .gtoreq.1.6.Type: GrantFiled: June 11, 1991Date of Patent: August 11, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventors: Jacob Hormadaly, Barry E. Taylor
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Patent number: 5114885Abstract: A crystallizable glass composition comprising ZnO, PbO, B.sub.2 O.sub.3, SiO.sub.2, SnO.sub.2 and optionally Al.sub.2 O.sub.3 and/or Cr.sub.2 O.sub.3.Type: GrantFiled: April 16, 1991Date of Patent: May 19, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventor: Jacob Hormadaly
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Patent number: 5100843Abstract: A glass having a negative anomalous partial dispersion .DELTA.P.sub.g,F, an index of refraction of n.sub.d .gtoreq.1.67 and an Abbe number of .nu..sub.d >36 has the following composition, in % by weight, 3-11 of SiO.sub.2, 0-3 of GeO.sub.2, .SIGMA. SiO.sub.2 +GeO.sub.2, 4.5-11; B.sub.2 O.sub.3, 29-35; 5-13 of Al.sub.2 O.sub.3 ; 1-3 of ZrO.sub.2 ; 0.2-3 of TiO.sub.2 ; 0.2-1.5 of Ta.sub.2 O.sub.5 ; 30-45 of PbO; 0-3 each of Li.sub.2 O, Na.sub.2 O, K.sub.2 O, Rb.sub.2 O, Cs.sub.2 O, .SIGMA. alkali metal oxide 0-3; 0-3.5 each of MgO, CaO, BaO, SrO, .SIGMA. alkaline-earth oxide 0-6, if .SIGMA. SiO.sub.2 and GeO.sub.2 .gtoreq.9; .SIGMA. alkaline-earth oxide 0-3.5, if .SIGMA. SiO.sub.2 and GeO.sub.2 <9; 0-14 of ZnO, 0-3 of La.sub.2 O.sub.3 ; 0-7 of Nb.sub.2 O.sub.3 ; 0-1 of Sb.sub.2 O.sub.3 ; 0-0.3 of As.sub.2 O.sub.3 ; 0-1.5 of WO.sub.3 ; 0-1 of F. This glass is inexpensive and can be produced in high quality, and has a high crystalization stability and good transmission values.Type: GrantFiled: May 31, 1990Date of Patent: March 31, 1992Assignee: Schott GlaswerkeInventors: Danuta Grabowski, Marc Clement, Volkmar Geiler
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Patent number: 5096620Abstract: Lead-zinc-borosilicate glass is provided having a boundary wetting angle with respect to ZnO of at most 40.degree., a processing temperature of at most 540.degree. C., a composition, consisting essentially of, in percent by weight on oxide basis, of______________________________________ 4.0-7.0 SiO.sub.2 13.0-17.0 B.sub.2 O.sub.3 43.0-50.0 PbO 24.0-29.0 ZnO 4.0-7.0 CuO 1.5-2.5 Al.sub.2 O.sub.3 ______________________________________and optionally 0-3 SnO.sub.2, Bi.sub.2 O.sub.3 or MoO.sub.3, as well as 0-1 Cr.sub.2 O.sub.3. The glass is particularly suitable for sealing electronic components, especially varistors made of zinc oxide, as well as a sintering aid for zinc oxide ceramics, especially in the production of varistors from zinc oxide.Type: GrantFiled: February 19, 1991Date of Patent: March 17, 1992Assignee: Schott GlaswerkeInventors: Hermann Ditz, Hartmut Paschke
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Patent number: 5079193Abstract: An encapsulant composition comprising a lead zinc silicoborate glass which forms a crystalline phase of Zn.sub.2 SiO.sub.4 and ZnB.sub.2 O.sub.4 when it is fired at 650.degree.-800.degree. C.Type: GrantFiled: July 31, 1990Date of Patent: January 7, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventor: Paul C. Donohue
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Patent number: 5075263Abstract: An enamel frit for producing an acid-resistant enamelled steel in a single coating comprising at least about 40% of silicon atoms, 50% of silicon atoms and boron atoms, where the proportion of the boron atoms should not fall below 6.5%, 63% of silicon atoms, boron atoms and sodium atoms, where the proportion of the sodium atoms should not fall below 7.5%, each relative to the overall total of the non-oxygen atoms in the frit, the proportion of the remaining non-oxygen atoms being less than about 37%, and 1.0 to 1.2% of cobalt atoms. In addition, there are (1) x fluorine atoms with 1%.ltoreq.x.ltoreq.11% and at least y lithium atoms and at most 2y lithium atoms with y=(15/x)+5 being present, the proportion of lithium atoms being from about 6.3% to 20% relative to the overall total of the non-oxygen atoms in the frit, or (2) y lithium atoms with 6.3%<y.ltoreq.Type: GrantFiled: December 21, 1990Date of Patent: December 24, 1991Assignee: Bayer AktiengesellschaftInventors: Hans-Joachim Schittenhelm, Werner Joseph
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Patent number: 5034354Abstract: There is disclosed a family of alkali-free, lead silicate glasses having properties that make them particularly suitable for use in producing perforated plates for such applications as multichannel plates. In addition to lead oxide and silica, the glasses contain ZnO, BaO, CaO and, under certain circumstances, MgO.Type: GrantFiled: May 16, 1990Date of Patent: July 23, 1991Assignee: Corning IncorporatedInventor: Gerald J. Fine
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Patent number: 5028567Abstract: A glass-ceramic obtained by heat treating a parent glass in which specific amounts of MgO and PbO are added to the SiO.sub.2 - Al.sub.2 O.sub.3 - ZnO - TiO.sub.2 system glass has a wide range of coefficients of thermal expansion and improved fineness in diameters of crystals and also improved chemical durability or thermal expansion curve.Type: GrantFiled: May 24, 1988Date of Patent: July 2, 1991Assignee: 501 Kabushiki Kaisha OharaInventors: Naoyuki Gotoh, Makoto Hayasaka
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Patent number: 4996173Abstract: The optical glass of the present invention comprising SiO.sub.2, alkali metal oxides, P.sub.2 O.sub.5 and Nb.sub.2 O.sub.5 has optical properties of 1.70 or more in refractive index nd and 30 or less in Abbe's number .nu.d and is superior in devitrification resistance and stability.Type: GrantFiled: February 13, 1989Date of Patent: February 26, 1991Assignee: Hoya CorporationInventor: Kazuo Tachiwana
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Patent number: 4961998Abstract: Dielectric ink, paste and tape compositions having controlled thermal expansion contain a mixture of glasses wherein at least one glass has a coefficient of thermal expansion (CTE) below the CTE of the substrate to which the dielectric composition is applied and at least one glass has a CTE above the CTE of said substrate. The dielectric compositions significantly reduce or eliminate warpage of the substrate.Type: GrantFiled: February 10, 1989Date of Patent: October 9, 1990Assignee: National Starch and Chemical Investment Holding CorporationInventors: Robert E. Senkalski, Donald L. Hasenmayer
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Patent number: 4961999Abstract: The invention is directed to a thick film thermistor composition consisting of finely divided particles of (a) a ruthenium-based pyrochlore, and (b) a short borosilicate glass or glass mixture, both dispersed in (c) an organic medium.Type: GrantFiled: September 5, 1989Date of Patent: October 9, 1990Assignee: E. I. Du Pont de Nemours and CompanyInventor: Jacob Hormadaly
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Patent number: 4906406Abstract: The invention is directed to a thick film thermistor composition consisting of finely divided particles of (a) a ruthenium-based pyrochlore, and (b) a short borosilicate glass or glass mixture, both dispersed in (c) an organic medium.Type: GrantFiled: July 21, 1988Date of Patent: March 6, 1990Assignee: E. I. Du Pont de Nemours and CompanyInventor: Jacob Hormadaly
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Patent number: 4882212Abstract: The present invention is directed to components and the process of forming the components for housing semiconductor devices. The components are formed of a unique ceramic-glass-metal composite material comprising ceramic particles, metallic particles and a glass matrix with said ceramic and metallic particles dispersed throughout. Metal elements can be embedded into the material to enable simplified fabrication of devices such as semiconductor packaging.Type: GrantFiled: October 30, 1986Date of Patent: November 21, 1989Assignee: Olin CorporationInventors: Narendra N. SinghDeo, Deepak Mahulikar, Sheldon H. Butt
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Patent number: 4855261Abstract: This invention relates to a sealing glass for use in bonding glass, ceramics and metals and specifies the composition of a sealing glass which is workable at moderate temperatures and is excellent in transparency and strength. Amorphous magnetic materials have themselves a crystallization temperature and when used in a magnetic head, the amorphous materials undergo crystallization in assembling the head at a sealing temperature higher than the crystallization temperature and becomes not only brittle but also deteriorated in magnetic characteristics so that the head becomes unsuitable for use. The present glass is advantageously used in such a case.Type: GrantFiled: December 8, 1988Date of Patent: August 8, 1989Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuo Mizuno, Atsushi Nishino, Masaki Ikeda, Shinji Kurio
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Patent number: 4824809Abstract: A new, CdO-and ThO.sub.2 -free optical glass with refractive indices of 1.73-1.78 and Abbe numbers of 30-34 and with particularly good devitrification stability comprises (in weight %):______________________________________ SiO.sub.2 12-20, B.sub.2 O.sub.3 10-18, PbO 50-60 Al.sub.2 O.sub.3 2-7, ZnO 0-4, ZrO.sub.2 0.5-3 La.sub.2 O.sub.3 2-10, Cs.sub.2 O 0-5, M.sub.2 O 0-1 (M.sub.2 O.dbd. Na.sub.2 O, K.sub.2 O, Li.sub.2 O) TiO.sub.2 0-5 with the SiO.sub.2 /B.sub.2 O.sub.3 -ratio being about 1.0 to ______________________________________ 1.5.Type: GrantFiled: December 28, 1987Date of Patent: April 25, 1989Assignee: Schott GlaswerkeInventors: Danuta Grabowski, Ludwig Ross
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Patent number: 4816949Abstract: The present invention relates to a magnetic head in which a magnetic metal film comprising a Co-containing amorphous alloy and a crystallizable glass of the PbO-B.sub.2 O.sub.3 -ZnO system as a solder glass are used. The magnetic head of the present invention has about 2 times higher recording density than the conventional one as a magnetic head for floppy disks and hard disks because an amorphous alloy is used. Since a crystallizable glass is used as the glass, there can be obtained a magnetic head having a high strength and superior humidity resistance and reliability.Type: GrantFiled: September 9, 1987Date of Patent: March 28, 1989Assignee: Hitachi, Ltd.Inventors: Seiichi Yamada, Takashi Naitoh, Takashi Namekawa, Akira Ikegami, Ryoo Gotoo, Toshikazu Nishiyama
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Patent number: 4721690Abstract: High PbO-content glass in the optical range of flint and heavy flint glasses from the system SiO.sub.2 --PbO--M.sub.2 O wherein M.sub.2 O=alkali metal oxides, said glass having a minimum PbO content of 30 wt. % and a minimum M.sub.2 O content of 0.5 wt. %, are provided with enhanced chemical stability without loss of the desired optical position by replacing a portion of the SiO.sub.2 and PbO such that the glass contains 1.5-6 wt. % (TiO.sub.2 +ZrO.sub.2) and the ratio of TiO.sub.2 :ZrO.sub.2 is about 0.3-2.0.Type: GrantFiled: February 5, 1985Date of Patent: January 26, 1988Inventors: Ludwig Ross, Danuta Grabowski, Burkhard Speit, Volkmar Geiler
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Patent number: 4710479Abstract: A sealing glass composition suitable for sealing members in semiconductor devices at a temperature below about 450.degree. C. for a short time and a comparatively low thermal expansion coefficient of about 33-48.times.10.sup.-7 /.degree.C. matching with semiconductors. The sealing glass composition comprises 50-80 vol % solder glass powder and 20-50 vol % filler powder of lead calcium titanate represented by (Pb.sub.1-m Ca.sub.m)TiO.sub.3 where 0<m.ltoreq.0.4.Type: GrantFiled: April 9, 1987Date of Patent: December 1, 1987Assignee: Nippon Electric Glass Company, LimitedInventors: Toshio Yamanaka, Fumio Yamaguchi
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Patent number: 4696909Abstract: Platinum corrosion reducing amounts of a premelted oxide mixture that is PbO and B.sub.2 O.sub.3, or PbO and SiO.sub.2, or PbO, SiO.sub.2 and B.sub.2 O.sub.3 are added to raw batch ingredients for a lead-containing solder glass. All or part of the Pb.sub.3 O.sub.4 or PbO normally used in the raw batch is replaced for advantages including reducing the amount of platinum corrosion in a platinum melter used to melt the raw batch to provide the glass.Type: GrantFiled: April 7, 1986Date of Patent: September 29, 1987Assignee: Owens-Illinois Television Products Inc.Inventor: Edward A. Weaver
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Patent number: 4655864Abstract: A casting composition for making dielectric green tapes comprising a dispersion of finely divided solids of (a) a noncrystallizable glass and (b) a mixture of refractory oxides in a solution of (c) organic polymer, which is readily depolymerizable at 825.degree.-1025.degree. C. in a nonoxidizing atmosphere, dissolved in (d) volatile nonaqueous solvent.Type: GrantFiled: March 25, 1985Date of Patent: April 7, 1987Assignee: E. I. Du Pont de Nemours and CompanyInventor: Joseph R. Rellick
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Patent number: 4654095Abstract: A dielectric composition comprising an admixture of finely divided solids comprising (a) a noncrystallizable glass of which the deformation temperature (T.sub.d) is 580.degree.-625.degree. C. and the softening point (T.sub.s) is 630.degree.-700.degree. C., and (T.sub.s -T.sub.d) is 50.degree.-75.degree. C., and (b) a refractory which is substantially insoluble in the glass at temperatures of 825.degree.-900.degree. C.Type: GrantFiled: March 25, 1985Date of Patent: March 31, 1987Assignee: E. I. Du Pont de Nemours and CompanyInventor: Jerry I. Steinberg
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Patent number: 4618538Abstract: A glass glazing is provided with a coating of a colored enamel composition along one or more edges. The enamel composition includes a vitreous matrix pigment and from 2 to 5% by weight of powdered tin dioxide which preferably is an additive during a comminution step. The vitreous matrix which represents at least 75% by weight of the enamel composition includes the following constituentsSiO: 25-33 (% by weight)PbO: 47-65B.sub.2 O.sub.3 : 3-7Na.sub.2 O: 1-4K.sub.2 O: 0-2Li.sub.2 O: 0-0.8ZnO: 0.2-0.5and provides a molar ratio of SiO.sub.2 to PbO between 1.6 and 2.7. The total content of the alkaline oxide are less than 5% by weight.The linear thermal expansion coefficient of the vitreous matrix is less than the glazing to be coated.Type: GrantFiled: September 12, 1985Date of Patent: October 21, 1986Assignee: Saint-Gobain VitrageInventors: Heinfried Emonts, Franz Gebhardt
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Patent number: 4578619Abstract: The disclosure is of a lead-free glass composition including SiO.sub.2, B.sub.2 O.sub.3, ZnO, Al.sub.2 O.sub.3, Na.sub.2 O, K.sub.2 O, CaO, and Li.sub.2 O. The glass is used as a cement frit and as an insulating layer in gas-filled display panels including an electrode which is insulated from the gas therein.Type: GrantFiled: June 22, 1983Date of Patent: March 25, 1986Assignee: Burroughs CorporationInventor: Ruvim Braude
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Patent number: 4568651Abstract: A glass for multi-focal eyeglass having a refractive index (n.sub.d) of 1.74 to 1.78, an Abbe number (.nu..sub.d) of 31 or more, a coefficient of thermal expansion of 82 to 95.times.10.sup.-7 and a softening point of 560.degree. to 640.degree. C., comprising, in % by weight,26 to 34% SiO.sub.2 +B.sub.2 O.sub.3 +Al.sub.2 O.sub.3 ;14 to 24% SiO.sub.2 ;6 to 14% B.sub.2 O.sub.3 ;0 to 4% Al.sub.2 O.sub.3 ;38 to 50% PbO;15 to 30% BaO+SrO+CaO+MgO+ZnO;2 to 24% BaO;0 to 17% SrO;0 to 15% CaO;0 to 10% MgO;0 to 12% ZnO; and0 to 3% ZrO.sub.2 ;wherein a weight ratio of B.sub.2 O.sub.3 /SiO.sub.2 ranges from 0.3 to 0.8 and a weight ratio of alkaline earth oxides/PbO ranges from 0.2 to 0.6.Type: GrantFiled: October 26, 1984Date of Patent: February 4, 1986Assignee: Hoya CorporationInventor: Hiroji Sagara
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Patent number: 4562162Abstract: A glass for multi-focal eyeglass having a refractive index (n.sub.d) of 1.67 to 1.73, an Abbe number (.nu..sub.d) of 33 or more, a coefficient of thermal expansion of 82 to 95.times.10.sup.-7 and a softening point of 560.degree. to 640.degree. C., comprising, in % by weight,32 to 40% SiO.sub.2 +B.sub.2 O.sub.3 +Al.sub.2 O.sub.3 ;22 to 40% SiO.sub.2 ;0 to 10% B.sub.2 O.sub.3 ;0 to 4% Al.sub.2 O.sub.3 ;4 to 10% Li.sub.2 O+Na.sub.2 O+K.sub.2 O;0 to 4% Li.sub.2 O;0 to 7% Na.sub.2 O;0 to 7% K.sub.2 O;30 to 47% PbO;3 to 24% BaO+SrO+CaO+MgO+ZnO;0 to 20% BaO;0 to 15% SrO;0 to 10% CaO;0 to 8% MgO;0 to 15% ZnO; and1 to 7% ZrO.sub.2 ;wherein a weight ratio of alkali metal oxides/PbO ranges from 0.1 to 0.3.Type: GrantFiled: October 26, 1984Date of Patent: December 31, 1985Assignee: Hoya CorporationInventor: Hiroji Sagara
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Patent number: 4550088Abstract: Lead oxide-base material for multilayer ceramic capacitors having high dielectric constant and insulation resistance over wide temperature range, e.g., 10.degree. C. to 85.degree. C.Type: GrantFiled: March 19, 1985Date of Patent: October 29, 1985Assignee: Union Carbide CorporationInventors: Hyun D. Park, Arthur E. Brown
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Patent number: 4542105Abstract: A glass composition for covering a semiconductor element. The glass composition has excellent resistance to chemicals and excellent electric characteristics. The glass composition includes 3 to 8% by weight of Al.sub.2 O.sub.3, 35 to 45% by weight of SiO.sub.2, 10 to 30% by weight of ZnO, 5 to 30% by weight of PbO, 1 to 10% by weight of B.sub.2 O.sub.3, and more than 5% but not exceeding 20% by weight of an alkaline earth metal oxide selected from the group consisting of MgO, CaO, SrO and BaO, where the maximum contents of MgO, CaO, SrO and BaO are 7% by weight, 3% by weight, 7% by weight, and 15% by weight, respectively.Type: GrantFiled: December 29, 1982Date of Patent: September 17, 1985Assignee: Tokyo Shibaura Denki Kabushiki KaishaInventors: Kazuyoshi Furukawa, Masaru Shimbo, Kiyoshi Fukuda, Katsujirou Tanzawa
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Patent number: 4537863Abstract: A sealing composition suitable for sealing alumina packages for integrated circuits at a temperature below about 450.degree. C. for a short time of about 10 minutes. The composition is a mixture of 50-80 wt. % vitreous solder glass powder of PbO-B.sub.2 O.sub.3 system having a deformation point of 350.degree. C. or less, 1-35 wt. % first ceramic powder and 1-45 wt. % second ceramic powder. The total amount of the first and second ceramic powders is 20-50 wt. %. The first ceramic comprises 68-75 wt. % ZnO, 23-28 wt. % SiO.sub.2 and 0-8 wt. % Al.sub.2 O.sub.3, and the second ceramic comprises 98-99.9 wt. % SnO.sub.2 and 0.1-2 wt. % ZnO.Type: GrantFiled: August 10, 1983Date of Patent: August 27, 1985Assignee: Nippon Electric Glass Company, Ltd.Inventors: Ichiro Matsuura, Fumio Yamaguchi
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Patent number: 4532221Abstract: This invention is concerned with the preparation of thermally crystallizable enamels suitable for application to glass-ceramics, particularly glass-ceramics having coefficients of thermal expansion less than 15.times.10.sup.-7 /.degree.C. The enamels are capable of being fired to maturity simultaneously with the precursor glass body being crystallized to a glass-ceramic. The enamels consist essentially, expressed in weight percent on the oxide basis, of:SiO.sub.2 : 36-58Al.sub.2 O.sub.3 : 8.5-16CaO: 0.5-10PbO: 27-40K.sub.2 O: 0.Type: GrantFiled: February 21, 1984Date of Patent: July 30, 1985Assignee: Corning Glass WorksInventors: Pernette R. M. Barlier, Gerard R. Boury, Jean-Pierre Mazeau
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Patent number: 4526874Abstract: An optical glass with the familiar optical position of n.sub.d >1.70 and v.sub.d >22, which differs from the familiar optical glasses of the optical position due to its lower density and good chemical stability, and is composed of (in percent by weight): SiO.sub.2 25-42, TiO.sub.2 15-35, B.sub.2 O.sub.3 0.5-7, BaO 3-13, CaO 1-3, Nb.sub.2 O.sub.5 1-20, GeO.sub.2 0-2, Al.sub.2 O.sub.3 0-4, Na.sub.2 O 7.5-15, Li.sub.2 O 0-9, K.sub.2 O 2-10, SrO 0-6, ZnO 0-5, ZrO.sub.2 0-3, and WO.sub.3 0-3.Type: GrantFiled: April 27, 1983Date of Patent: July 2, 1985Assignee: Schott GlaswerkeInventors: Danuta Grabowski geb. Marszalek, Ludwig Ross, Volkmar Geiler, Karl Mennemann
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Patent number: 4521524Abstract: A glass filter for contrast enhancement in a color CRT display devices comprises100 parts by weight of a base glass comprising, in % by weight3 to 70% SiO.sub.2,0 to 40% B.sub.2 O.sub.3,0 to 23% Al.sub.2 O.sub.3,0 to 23% R.sub.2 O (R.sub.2 O being at least one selected from the group consisting of Li.sub.2 O, Na.sub.2 O and K.sub.2 O),2 to 35% RO (RO being at least one selected from the group consisting of MgO, CaO, SrO, BaO, ZnO and PbO),0 to 10% TiO.sub.2,0 to 10% ZrO.sub.2,0 to 35% La.sub.2 O.sub.3 and5 to 40% Nd.sub.2 O.sub.3,at least two coloring components selected form the group consisting of 6 parts by weight or less CeO.sub.2, 1.0 parts by weight or less CuO, 3.5 parts by weight or less MnO.sub.2, 0.15 parts by weight or less CoO, 3.0 parts by weight or less Fe.sub.2 O.sub.3, 1.5 parts by weight or less NiO and 5.0 parts by weight or less Pr.sub.6 O.sub.11, andat least one coloring component selected form the group consisting of CeO, CuO, MnO.sub.2 and CoO.Type: GrantFiled: September 21, 1982Date of Patent: June 4, 1985Assignee: Hoya CorporationInventor: Toshiharu Yamashita
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Patent number: 4520115Abstract: These objects have been attained by providing highly absorbent lead containing alkali metal silicate glasses for cathode ray tube image screens, having a linear absorption coefficient .mu. of >30 cm.sup.-1 (0.6 .ANG.) and with a high resistance to discoloration by X-ray and electron radiation, comprises, in weight percent:______________________________________ SiO.sub.2 20-65% P.sub.2 O.sub.5 + B.sub.2 O.sub.3 + Al.sub.2 O.sub.3 0-30% Li.sub.2 O 0-5% Na.sub.2 O 0-10% K.sub.2 O 0-15% MgO + CaO + ZnO 0-15% SrO 0-20% BaO 0-40% PbO 5-60% ZrO.sub.2 0-10% CeO.sub.2 0.1-5% Other Components 0-20%.Type: GrantFiled: August 2, 1983Date of Patent: May 28, 1985Assignee: Schott GlaswerkeInventors: Burkhard Speit, Karl Mennemann, Georg Gliemeroth
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Patent number: 4515898Abstract: An improved semiconductor die bonding structure and method for electrical devices is described which utilizes a ductile foil between the semiconductor die and the base of the device package. The die is sealed to the foil with a die bonding material formed from a titania free base glass to which has been added 23.6 to 36.4 weight percent lead titanate powder to give a glass plus ceramic mixture consisting essentially of (by weight percent) 2.5-10.7% GeO.sub.2, 0-2.3% SiO.sub.2, 58.6-78.5% PbO, 0-5.3% PbF.sub.2, 7-13% B.sub.2 O.sub.3, 2.5-6.9% Al.sub.2 O.sub.3, 0-5.3% ZnO, 0.4-2.3% V.sub.2 O.sub.5, 0-5.3% CdO, and 6.2-9.6% TiO.sub.2. The ductile foil is bonded to the ceramic package base directly without intermediate layers or alternatively by means of an improved foil bonding glass material consisting essentially of (by weight percent) 10-15% SiO.sub.2, 45-55% PbO, 8-12% ZnO, 2-5% Al.sub.2 O.sub.3, and 25-30% B.sub.2 O.sub.3.Type: GrantFiled: May 25, 1984Date of Patent: May 7, 1985Assignee: Motorola, Inc.Inventors: Earl K. Davis, James E. Drye, David J. Reed
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Patent number: 4495298Abstract: A thallium-containing optical glass composition which comprises the following oxides in the indicated proportions in mole %: SiO.sub.2 35-80, Tl.sub.2 O 1-30, Tl.sub.2 O+R.sub.2 O (R being an alkali metal) 1-35, ZnO 0-35, GeO.sub.2 0-30, BaO 0-25, TiO.sub.2 0-20, MgO 0-20, B.sub.2 O.sub.3 0-less than 10, ZrO.sub.2 0-2, Al.sub.2 O.sub.3 0-8, SnO 0-5, CaO 0-10, SrO 0-10, PbO 0-10, La.sub.2 O.sub.3 0-5, Bi.sub.2 O.sub.3 0-8, and Ta.sub.2 O.sub.5 0-2, and satisfies the following relations:5.ltoreq.ZnO+GeO.sub.2 +BaO+TiO.sub.2 +MgO+B.sub.2 O.sub.3 .ltoreq.40,0.1.ltoreq.ZrO.sub.2 +Al.sub.2 O.sub.3 +SnO.ltoreq.8,and0.ltoreq.CaO+SrO+PbO+La.sub.2 O.sub.3 +Bi.sub.2 O.sub.3 +Ta.sub.2 O.sub.5 .ltoreq.10.Type: GrantFiled: May 11, 1982Date of Patent: January 22, 1985Assignee: Nippon Sheet Glass Co., Ltd.Inventors: Takasi Yamagishi, Yukio Noguchi
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Patent number: 4476090Abstract: There is described a new material for jewelry and commodities which has a relatively low density and also is low carat but resistant to oxidation and corrosion. It consists of a noble metal or alloy and 1 to 70 volume % glass, whereby as glass there is used a glass frit having a transformation temperature of 300.degree. to 500.degree. C. and a softening interval of over 80.degree. C. There is also described a process for its production.Type: GrantFiled: May 7, 1984Date of Patent: October 9, 1984Assignee: Degussa AktiengesellschaftInventors: Horst Heidsiek, Gernot Jackel
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Patent number: 4472511Abstract: Highly refractive, ThO.sub.2 -free optical glasses having refractive indices of 1.86-1.94 and Abbe-index numbers greater than or equal to 30, comprise:______________________________________ B.sub.2 O.sub.3 17-24 SiO.sub.2 0.5-6 B.sub.2 O.sub.3 + SiO.sub.2 19-27 La.sub.2 O.sub.3 40.1-51 ZrO.sub.2 5-9 Nb.sub.2 O.sub.5 0.5-25 Ta.sub.2 O.sub.5 0-27 Nb.sub.2 O.sub.5 + Ta.sub.2 O.sub.5 14-27 TiO.sub.2 0-8 PbO 0-12 ZnO 0-4 Al.sub.2 O.sub.Type: GrantFiled: September 22, 1982Date of Patent: September 18, 1984Assignee: Schott GlaswerkeInventors: Karl Mennemann, Danuta Grabowski
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Patent number: 4469800Abstract: This invention is concerned with the preparation of moldable optical glasses having refractive indices of about 1.65-1.735, dispersions of about 38-58, transition temperatures lower than about 500.degree. C., softening points lower than about 600.degree. C., and satisfactory chemical durability consisting essentially, expressed in terms of parts by weight as calculated from the batch, of______________________________________ B.sub.2 O.sub.3 22-38 BaO 3-33 La.sub.2 O.sub.3 5-33 PbO 0-36 ZnO 0-14 CdO 0-12 SrO 0-10 BaO + La.sub.2 O.sub.3 + PbO + ZnO + CdO + SrO 55-68 Li.sub.2 O 0-4 Na.sub.2 O 0-4 Li.sub.2 O + Na.sub.2 O 1.5-4 F 1-8.Type: GrantFiled: July 28, 1983Date of Patent: September 4, 1984Assignee: Corning Glass WorksInventors: Jean E. Boudot, Jean P. Mazeau
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Patent number: 4459166Abstract: A silver metallizing paste for attachment of silicon semi-conductive devices in lead-frame packages, specifically ceramic packages, which is less expensive than a gold preform but useable in hermetic packages, and provides better electrical and thermal conductivity, and higher bond strength, than silver polyimides. From 25 to 95% of silver is blended with a low-melting glass, preferably one having 95-96% PbO, and a paste or ink is formed with a suitable vehicle at 75-85% solids. Use of the paste follows conventional practice. Selection of Ag:glass ratio depends on the type of die bonding to be used. The paste is particularly useful in MOS technology, where low contact resistance is required, and also finds applications as a solder substitute and bonding chip capacitors. It is most advantageous in attachment of larger-area integrated circuits in that stress cracking associated with the gold-silicon eutectic is avoided.Type: GrantFiled: May 16, 1983Date of Patent: July 10, 1984Assignee: Johnson Matthey Inc.Inventors: Raymond L. Dietz, Michael Featherby, Peter K. Margetts
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Patent number: 4451761Abstract: The disclosure is of a glass composition including PbO, SiO.sub.2, B.sub.2 O.sub.3, BaO, ZnO, Al.sub.2 O.sub.3 and Na.sub.2 O. The glass is used as an insulating layer in gas-filled display panels including an electrode which is insulated from the gas therein.Type: GrantFiled: January 13, 1982Date of Patent: May 29, 1984Assignee: Burroughs CorporationInventor: Nicholas W. Kay
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Patent number: 4439531Abstract: CdO- and ThO-free, highly refractive optical glass having a refractive index of 1.85-2.05 and an Abbe index of 25-43, characterized by the following composition (in percent by weight):______________________________________ SiO.sub.2 5-15 B.sub.2 O.sub.3 2.5-8 SiO.sub.2 + B.sub.2 O.sub.3 7-23 SiO.sub.2 /B.sub.2 O.sub.3 1.3-2.1 La.sub.2 O.sub.3 43-56 Gd.sub.2 O.sub.3 0-14 La.sub.2 O.sub.3 + Gd.sub.2 O.sub.3 43-60 ZrO.sub.2 3-10 Nb.sub.2 O.sub.5 0-15 Ta.sub.2 O.sub.5 0-20 Nb.sub.2 O.sub.5 + Ta.sub.2 O.sub.Type: GrantFiled: July 22, 1982Date of Patent: March 27, 1984Assignee: Schott GlaswerkeInventors: Karl Mennemann, Volkmar Geiler
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Patent number: 4435511Abstract: A glass having a composition which would result by mixing from 20 to 80 weight percent of glass A with 80 to 20 weight percent of glass B and melting the mixture to form a homogeneous glass:______________________________________ Glass A Glass B Weight Weight Percent Percent ______________________________________ SiO.sub.2 1.8-2.2 SiO.sub.2 67-70 B.sub.2 O.sub.3 14-16.5 Li.sub.2 O 14-17 PbO 69-72 Al.sub.2 O.sub.3 4-5.5 ZnO 8.2-9.2 CaO 9-12 BaO 2.7-3.5 ______________________________________said glass having a coefficient of thermal contraction from 15.degree. C. below the annealing point to room temperature of from 106 to 115.times.10.sup.-7 /.degree.C.Type: GrantFiled: September 13, 1982Date of Patent: March 6, 1984Assignee: Owens-Illinois, Inc.Inventor: Edward A. Weaver
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Patent number: 4421947Abstract: A material hermetically seals two members. One member may be titanium or a titanium alloy and the other member may be a noble metal such as platinum. The seal is resistant to acids and alkalis and is substantially impervious to shocks resulting from mechanical forces or abrupt changes in temperature. The material includes a pair of fluxes having different melting temperatures and a stuffing material including the oxides of zinc and zirconium. The oxides of zinc and zirconium become crystallized at the surface between one of the members and the material. An oxygen valence bond is also produced between the material and such member. The material is more amorphous at the boundary with the second member than at positions removed from such member. The material is formed by progressive heatings for at least a pair of periods of time insufficient to crystallize all of the material and by rapid coolings of the material after each of such heatings.Type: GrantFiled: January 28, 1981Date of Patent: December 20, 1983Assignee: James C. KyleInventor: James C. Kyle
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Patent number: 4409292Abstract: A vitreous material suitable for coating a semiconductor component comprises, by weight:30% to 40% zinc oxide ZnO,15% to 30% lead oxide PbO,20% to 40% boron oxide B.sub.2 O.sub.3,5% to 20% silicon dioxide SiO.sub.2,2% to 10% aluminum titanate Al.sub.2 TiO.sub.5, and0% to 5% bismuth oxide Bi.sub.2 O.sub.3.Type: GrantFiled: July 9, 1982Date of Patent: October 11, 1983Assignee: Societe Anonyme dite Compagnie General d'ElectriciteInventor: Jean-Paul Parant