Abstract:
A composition represented by the formula Si1nullxGexO2(1nully)N1.33y, wherein x is from about 0.05 to about 0.6 and y is from about 0.14 to about 0.74 exhibits properties highly suited for use in fabricating waveguides for liquid crystal based optical devices. In particular, the compositions have an index of refraction of from about 1.6 to about 1.8 for light at a wavelength of 1550 nm, and/or a coefficient of thermal expansion of from about 2.5null10null6null C.null1 to about 5.0null10null6null C. null1. The compositions also have inherently low hydrogen content, and a high hydrogen permeability which allows better hydrogen removal by thermal annealing to provide a material which exhibits low optical losses and better etching properties than alternative materials.
Abstract:
A composition represented by the formula Si1−xGexO2(1−y)N1.33y, wherein x is from about 0.05 to about 0.6 and y is from about 0.14 to about 0.74 exhibits properties highly suited for use in fabricating waveguides for liquid crystal based optical devices. In particular, the compositions have an index of refraction of from about 1.6 to about 1.8 for light at a wavelength of 1550 nm, and/or a coefficient of thermal expansion of from about 2.5×10−6° C.−1 to about 5.0×10−6° C.−1. The compositions also have inherently low hydrogen content, and a high hydrogen permeability which allows better hydrogen removal by thermal annealing to provide a material which exhibits low optical losses and better etching properties than alternative materials.
Abstract:
The application discloses a number of unique sintered quartz glass products together with new silica compositions and processes for making and using such products. Nitrided clear and opaque nitrided quartz products are disclosed having incredible physical properties resulting from the incorporation of very small, but effective, amounts (e.g., 25 ppm or more) of chemically bound nitrogen. Opaque quartz glass heat shields with remarkable resistance to transmission of infrared radiation are disclosed which can have a high bubble population density, such as 80 to 120 per mm2. These heat shields make possible remarkable improvement in the performance of tube furnaces and other reactors used in processing silicon wafers and other electronic components.
Abstract translation:该申请公开了许多独特的烧结石英玻璃产品以及新的二氧化硅组合物和制备和使用这些产品的方法。 公开了氮化透明和不透明的氮化石英产物,其具有由于引入非常小但有效的化学键合氮的量(例如25ppm或更多)而产生的令人难以置信的物理性质。 公开了具有显着的抗红外辐射透射性的不透明石英玻璃隔热罩,其可以具有高的气泡总体密度,例如80至120 / mm 2。 这些隔热罩可以显着改善用于处理硅晶片和其他电子部件的管式炉和其他反应器的性能。
Abstract:
There is provided a quartz glass crucible for pulling a silicon single crystal and a production process for the crucible, wherein an inner surface of the crucible is crystallized without addition of impurities during pulling a silicon single crystal, thereby impurities serving as causes of crystal defects being not incorporated into the silicon single crystal, so that deterioration of its inner surface is suppressed to improve a crystallization ratio, and accordingly productivity of the quartz glass crucible as well as a quality of the silicon single crystal is improved, and the quartz glass crucible for pulling a silicon single crystal comprises a crucible base body (3) made of a translucent quartz glass layer and a synthetic quartz glass layer (4) formed on an inner wall surface of the crucible base body (3), wherein a portion encircled by a brown ring on an inner surface of the quartz glass crucible is uniformly crystallized during pulling the silicon single crystal.
Abstract:
An inner chamber is arranged inside an outer chamber and stores quartz crystal powder. A space is defined between the inner chamber and the outer chamber, and an oxygen gas is introduced into that space. The quartz crystal powder is supplied from the inner chamber into a burner section, together with the oxygen gas. The burner section is also supplied with a flammable gas from a gas control device. The flammable gas contains an NH.sub.3 gas. The heat produced by the combustion of the flammable and oxygen gases fuses the quartz crystal powder supplied from the inner chamber into the burner section. As a result, quartz containing nitrogen is produced. The nitrogen is contained in the fused quartz in an amount which is expressed as 1 to 10% by molar ratio.
Abstract:
In order to eliminate the effect of water attack on silica optical fibres, the fibres are provided with a surface layer of silicon nitride or silicon oxynitride. The method proposed includes direct nitridation. This may be achieved by adding a nitriding atmosphere to the drawing furnace gases, or to the reactive gases (TiCl.sub.4 and SiCl.sub.4) incorporated in the flame of an oxyhydrogen torch for the formation of a compressive silica/titania layer on an optical fibre by a glass soot deposition and sintering process.
Abstract:
Dielectric optical waveguides can be made having a core of vitreous silica doped with nitrogen in the form of silicon nitride, and a cladding of pure vitreous silica. Silicon nitride may be present in the core material in quantities varying between .1% to 10% by weight. The silicon nitride doped silica glass can be formed in a boule by passing a mixture of gaseous compounds containing silicon and nitrogen through a induction coupled plasma discharge. The outside of the doped silica boule may be oxidized to reduce the nitrogen content.
Abstract:
Die Erfindung geht von einem optischen Bauteil aus synthetischem Quarzglas zur Verwendung in der ArF-Excimerlaser-Lithographie mit einer Einsatzwellenlänge von 193 nm aus, mit einer Glasstruktur im Wesentlichen ohne Sauerstoffdefektstellen, einem Wasserstoffgehalt im Bereich von 0,1 x 10 16 Molekülen/cm 3 bis 1,0 x 10 18 Molekülen/cm 3 und einem Gehalt an SiH-Gruppen von weniger als 2 x 10 17 Molekülen/cm 3 und mit einem Gehalt an Hydroxylgruppen im Bereich zwischen 0,1 und 100 Gew.-ppm, wobei die Glasstruktur eine fiktive Temperatur von weniger 1070 °C aufweist. Um ausgehend von einer Messung des Kompaktierungsverhaltens bei einer Messwellenlänge von 633 nm eine verlässliche Prädiktion zum Kompaktierungsverhalten beim Einsatz mit UV-Laserstrahlung der Einsatzwellenlänge ermöglicht, wird eine Ausgestaltung des optischen Bauteil vorgeschlagen, bei der es auf Bestrahlung mit Strahlung einer Wellenlänge von 193 nm mit 5x10 9 Pulsen mit einer Pulsbreite von 125 ns und einer Energiedichte von jeweils 500µJ/cm 2 sowie einer Pulswiederholfrequenz von 2000 Hz mit einer laserinduzierten Brechzahländerung reagiert, deren Betrag bei Vermessung mit der Einsatzwellenlänge von 193 nm einen ersten Messwert M 193nm und bei Vermessung mit einer Messwellenlänge von 633 nm einen zweiten Messwert M 633nm ergibt, wobei gilt: M 193nm /M 633nm
Abstract:
Hollow ingots of transparent synthetic vitreous silica glass of external diameter greater than 400 mm and internal diameter greater than 300 mm are disclosed. The ingots are substantially free from bubbles or inclusions greater than 100 μιη in diameter, have no more than 100 ppB of any individual metallic impurity, and have chlorine concentration less than 5 ppM. Also disclosed are methods for producing such ingots, in which a porous soot body of density greater than 0.4 g/ cm 3 is deposited on an oxidation resistant mandrel. The soot body is dehydrated on a mandrel comprising graphite, carbon fibre reinforced carbon, silicon carbide, silicon impregnated silicon carbide, silicon carbide-coated graphite or vitreous silica, either under vacuum or in the presence of a reducing gas, and then sintered to transparent pore-free glass under vacuum or in an atmosphere of helium.
Abstract:
A method of fabricating doped quartz component is provided herein. In one embodiment, the doped quartz component is a yttrium doped quartz ring configured to support a substrate. In another embodiment, the doped quartz component is a yttrium and aluminum doped cover ring. In yet another embodiment, the doped quartz component is a yttrium, aluminum and nitrogen containing cover ring.