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| Number | Title | Issue Date |
| 6841210 | Multilayer structured quartz glass crucible and method for producing the same Disclosed is a multilayer structured quartz glass crucible, for pulling up silicon single crystal, whose structure has at least three layers comprising: a translucent outer layer made of naturally occurring quartz glass and having a large number of pores, a transluc... | 01/11/2005 |
| 6604941 | Refractory crucibles and molds for containing reactive molten metals and salts Refractory ceramics and composite materials consisting of nitrides, mixed nitrides and oxides, and oxynitrides of Group IV metals Hf, Zr, Ti, and Group III metals Sc, Y, and lanthanides La through Lu, are used to form refractory articles, or as coatings f... | 08/12/2003 |
| 6574991 | Pure fused silica, furnace and method An article of relatively pure silica, and a furnace and method of producing the article. The article is produced by collecting molten silica particles in a refractory furnace in which at least a portion of the refractory has been exposed to a halogen-cont... | 06/10/2003 |
| 6346306 | Method for molding dental restorations and related apparatus The present is invention is concerned with a heat deformable crucible used for the preparation of glass-ceramic materials and the resulting dental restorations. The crucible has a base and a side portion and is formed from the sintering of silica with a p... | 02/12/2002 |
| 6200385 | Crucible for growing macrocrystals A crucible 40 having an inner surface 42 not wetted by a melt which shrinks when it solidifies is provided with indentations 41 in the walls of the crucible to support an ingot grown in it. Supporting the crystal provides a gap between the bottom of the i... | 03/13/2001 |
| 6139983 | Corrosion-resistant member, wafer-supporting member, and method of manufacturing the same This invention relates to a corrosion-resistant member having a resistance to plasma of a halogen based corrosive gas, which comprises a main body and a corrosion-resistant layer formed on a surface of the main body and containing a fluoride of at least o... | 10/31/2000 |
| 5989021 | Quartz crucible with large diameter for pulling single crystal and method of producing the same A large diameter quartz crucible with an inner diameter of 22 inches or more comprises an opaque silica glass outer layer having bubbles of 10 μm to 250 μm in diameter and 5 mm to 20 mm in thickness and a transparent silica glass inner layer having 0.5%... | 11/23/1999 |
| 5952063 | Crucible of pyrolytic boron nitride for molecular beam epitaxy Disclosed is a crucible of pyrolytic boron nitride (PBN) for molecular beam epitaxy for melting of the source material, with which the troubles due to adhering of the molten source material in the form of drops caused on the quality of the epitaxial layer... | 09/14/1999 |
| 5932294 | MBE deposition method employing effusion cell having a unibody crucible A unibody, monolithic, one-piece negative draft crucible for a MBE effusion cell. The crucible maximizes capacity, uniformity and long term flux stability, and minimizes oval defects, depletion effects, and short term shutter-related flux transients. The ... | 08/03/1999 |
| 5882807 | Jig for heat treatment and process for fabricating the jig A jig used for heat treatment made from an SiC-coated silicon carbide material, wherein the SiC film is coated by the CVD method on a silicon carbide matrix in which silicon has been impregnated and wherein there are no pores with a diameter of 2 μm or l... | 03/16/1999 |
| 5827371 | Unibody crucible and effusion source employing such a crucible A unibody, monolithic, one-piece negative draft crucible for an MBE effusion source. The crucible maximizes capacity, uniformity and long term flux stability, and minimizes oval defects, depletion effects, and short term shutter-related flux transients. T... | 10/27/1998 |
| 5820681 | Unibody crucible and effusion cell employing such a crucible A unibody, monolithic, one-piece negative draft crucible for a MBE effusion cell. The crucible maximizes capacity, uniformity and long term flux stability, and minimizes oval defects, depletion effects, and short term shutter-related flux transients. The ... | 10/13/1998 |
| 5525313 | Apparatus for manufacturing a phosphor used in a display device An apparatus for manufacturing a phosphor for use in an electroluminescent panel includes a storage body that is permeable to a fluid, and an open boat for containing a phosphor material. The open boat is stored in, and has a shape corresponding to, the s... | 06/11/1996 |
| 5391229 | Apparatus for chemical vapor deposition of diamond including graphite substrate holders Graphite substrate holders for employment in apparatus for chemical vapor deposition of diamond decrease the tendency of the formed diamond sheets to crack or shatter upon separation from the substrates. Said holders and the substrates therein preferably ... | 02/21/1995 |
| 5333844 | Non-graphite crucible for high temperature applications A multi-piece crucible for high temperature applications comprises a tubular side wall member having a lip on the inside surface and a bottom member or members forming a container for containing a melt of a material during a high temperature melt-casting ... | 08/02/1994 |
| 5318279 | Receptacle for molten metals, material for this receptacle and method of producing the material The invention concerns a composite material for a receptacle for transferring molten metal. It is comprised of a refractory material and a frame chosen in the group comprised of mineral refractory wires and metallic wires. Application to the foundry industry.... | 06/07/1994 |
| 5182149 | Boron nitride boat and process for producing it A pyrolytic boron nitride boat having a cavity suitable for use in growing and doping semi-conductor crystals such as gallium arsenide and said cavity having a roughened surface formed of substantially uniform projected no nodules, disturbances, or ridges... | 01/26/1993 |
| 5158750 | Boron nitride crucible A boron nitride crucible having a closed end, an open end, an internal surface and an external surface, and wherein at least a portion of the external surface, preferably proximate the open end of the crucible, has a duplex coating comprising an undercoat... | 10/27/1992 |
| 5085582 | Silicon nitride containers for the sintering of silicon nitride ceramics An enclosable vessel for containing a silicon nitride article during sintering in a furnace to protect the silicon nitride article from thermal decomposition and contamination reactions with furnace materials comprises a closeable walled container formed ... | 02/04/1992 |
| 5084312 | Molten metal containment vessel with rare earth oxysulfide protective coating thereon and method of making same An improved molten metal containment vessel is disclosed in which wetting of the vessel's inner wall surfaces by molten metal is inhibited by coating at least the inner surfaces of the containment vessel with one or more rare earth oxysulfide or rare eart... | 01/28/1992 |
| 4995595 | Smelting crucible Smelting crucible of mineral materials for melting down materials by electrical heating. In the base (2) of the crucible, there is a tapping opening (3) and, in the region of the upper edge of the crucible, there is a flange (4) for mounting the crucible ... | 02/26/1991 |
| 4971772 | High-purity lining for an electric low shaft furnace An inside lining for the reaction chamber of an electric low shaft furnace, particularly for producing high-purity silicon from silicon oxide by carbothermic reduction, is provided which has a melting crucible of dense graphite and a thermal insulation, w... | 11/20/1990 |
| 4956208 | Manufacture of a quartz glass vessel for the growth of single crystal semiconductor A quartz glass crucible adapted for use in a process for pulling a single crystal semiconductor material having an opaque outer substrate of a quartz glass with a relatively high bubble content and an inner transparent glass layer which is substantially f... | 09/11/1990 |
| 4865682 | Growth method of an organic compound single crystal and a boat used therefor In the boat growth method of the IIIb-Vb group compound, the quartz boat is tridymitized on at least the surface thereof so as to prevent wetting of the boat due to the melt of the compound and hence to enhance the yield of a single crystal.... | 09/12/1989 |
| 4823359 | Furnance having dense refractory oxide liner A refractory product is shown in the form of a dense sintered alumina-chromia, zirconia-alumina-silica, zirconia-alumina body, or zirconia-chromia-alumina having less than about 8% of homogeneously distributed closed porosity formed by sintering an intima... | 04/18/1989 |
| 4775565 | Vessel for refractory use having multi-layered wall The inventive vessel, e.g. crucible, made of a refractory inorganic material such as boron nitride has a multi-layered wall structure which is an integral alternate lamination of layers of higher density and layers of lower density. Such a multi-layered s... | 10/04/1988 |
| 4773852 | Pyrolytic boron nitride crucible and method for producing the same A pyrolytic boron nitride crucible is provided. The crucible contains at least five wall layers consisting of first and second wall layers. The thickness of each of the first wall layers is 5 to 100 microns and the thickness of each of the second wall lay... | 09/27/1988 |
| 4747774 | Conforming crucible/susceptor system for silicon crystal growth A crucible/susceptor system is described in which the walls of the crucible and the susceptor cavity are sloped outward in an angle sufficient for the force of gravity to exceed the inward pulling forces created by the high surface tension of molten silic... | 05/31/1988 |
| 4690841 | Pyrolytic boron nitride article A pyrolytic boron nitride article has a uniform structure 0.5 or less nodules/cm2 in average all through the overall surface of the article and 2 or less nodules in any portion of a unit square centimeter on the surface of the article. The pyro... | 09/01/1987 |
| 4668481 | Apparatus for manufacturing a compound-semiconductor single crystal by the liquid encapsulated czochralski (LEC) process A compound-semiconductor single-crystal-manufacturing apparatus comprises a crucible for holding a molten raw material of GaAs and a liquid capsule element of B2 O3, a crucible holder, a heat element concentrically surrounding the cr... | 05/26/1987 |
| 4613306 | Evaporator crucible for vacuum depositing systems Evaporator crucible for vacuum depositing systems, having a crucible bottom with at least one bottom opening for the introduction of material in rod form for evaporation. At a distance from the bottom opening there is provided at least one metal crucible ... | 09/23/1986 |
| 4610437 | Crucible for holding salt baths for the boriding of steels There is provided a crucible for containing salt baths for the boriding of steels which has a high service life made of a steel which consists of (or consists essentially of) 0.05-0.8% carbon, 0.8-2.5% silicon, 0.1-2.0% manganese, 0-1.5% aluminum, 6-30% c... | 09/09/1986 |
| 4596700 | Apparatus for producing single crystal An apparatus for producing a single crystal according to the CZ method, which comprises a closed container consisting of upper and lower halves and having a shaft for pulling up the single crystal, at least a part of which contacting with said vapor of th... | 06/24/1986 |
| 4528939 | Electrically conductive containment vessel for molten aluminum The present invention is directed to a containment vessel which is particularly useful in melting aluminum. The vessel of the present invention is a multilayered vessel characterized by being electrically conductive, essentially nonwettable by and nonreac... | 07/16/1985 |
| 4515755 | Apparatus for producing a silicon single crystal from a silicon melt An apparatus for producing silicon single crystal from melted silicon by the pull-up process using a seed crystal, wherein at least a portion of a device in contact with the melted silicon includes a layer of silicon nitride precipitated from gaseous phas... | 05/07/1985 |
| 4487621 | Method of sealing glass furnaces to prevent air leakage The outside walls of the regenerator of a glass melting furnace is coated with a high temperature silicone elastomer. Several coats are applied in those areas of high differential pressure and low relative resistance to air flow therethrough. The cleanout... | 12/11/1984 |
| 4372543 | Cupel A cupel for the fire assaying of ore samples is provided having an improved configuration comprising a primary hemispherical cavity within which is disposed a secondary hemispherical cavity. The secondary cavity has a radius of curvature no greater than o... | 02/08/1983 |
| 4264803 | Resistance-heated pyrolytic boron nitride coated graphite boat for metal vaporization Resistance-heated vaporization boats for the vacuum vaporization of metals, such as aluminum, chromium, copper or the like, are made by machining a boat cavity in at least one side of a graphite bar. The bar is totally encapsulated over its entire outer s... | 04/28/1981 |
| 4259061 | Method of achieving uniform sintering shrinkage in a laminated planar green ceramic substrate and apparatus therefor A method of achieving uniform shrinkage of a laminated green ceramic substrate during sintering wherein the substrate is placed on a flat, relatively thick plate of refractory material such as molybdenum, tantalum or tungsten or alloys thereof with the fl... | 03/31/1981 |
| 4144117 | Method for producing a lithium tantalate single crystal A method for producing a lithium tantalate single crystal comprises the steps of preparing a melt consisting essentially of lithium tantalate in a platinum-rhodium crucible including 20 to 40 weight percent of rhodium, and growing a lithium tantalate sing... | 03/13/1979 |
