Abstract:
High purity silicon oxyfluoride glass suitable for use as a photomask substrates for photolithography applications in the VUV wavelength region below 190 nm is disclosed with the silicon oxyfluoride glass having a preferred fluorine content
Abstract translation:公开了具有优选氟含量<0.5重量%的氟氧化硅玻璃,适合用作光刻应用中的低于190nm的VUV波长区域的光掩模基板的高纯度氟氧化硅玻璃。 本发明的氟氧化硅玻璃在157nm波长下是透射的,使其特别适用于157nm波长区域的光掩模衬底。 本发明的光掩模基材是“真空”的氟氧化硅玻璃,其在真空紫外(VUV)波长区域中表现出非常高的透射率,同时保持通常与高纯度熔融石英相关的优异的热和物理性能。 除了含氟并且具有很少或不含OH含量之外,本发明的适合用作157nm的光掩模衬底的氟氧化硅玻璃的特征还在于具有小于1×10 17分子/ cm 3的分子氢和低氯水平。
Abstract:
According to a known method for producing a tube consisting of doped quartz glass, the starting components are fed to a deposition burner, particles containing SiO2 and GeO2 are formed, and are deposited on a mandrel rotating about its longitudinal axis, forming a porous layer of soot. Based on said method, the aim of the invention is to ensure that the doping agent is distributed over the tube wall in a radially homogeneous manner. In order to achieve this, an outer compression area (3) having a higher density is generated in the outer area of the layer of soot, and surrounds an inner area (2) of the layer of soot, said inner area having a lower density. A tubular semifinished product consisting of porous quartz glass containing GeO2, which can be subjected to dehydration treatment without significantly changing the predefined distribution of doping agent over the tube wall, is characterised in that the area of the outer wall of the tube is provided with an outer compression area (3) having a higher density and surrounding an inner area (2) having a smaller density.
Abstract:
A method for forming an optical fiber preform and fibers drawn from the preform. The method includes forming a soot cladding monolith, inserting a consolidated core cane into the internal cavity, and processing the resulting core-cladding assembly to form a preform. Processing may include exposing the core-cladding assembly to a drying agent and/or dopant precursor, and sintering the core-cladding assembly in the presence of a reducing agent to densify the soot cladding monolith onto the core cane to form a preform. The preform features low hydroxyl content and low sensitivity to hydrogen. Fibers drawn from the preform exhibit low attenuation losses from absorption by the broad band centered near 1380 nm.
Abstract:
Bekannt sind Verfahren zur Herstellung einer optischen Faser durch Elongieren einer Quarzglas-Vorform oder eines koaxialen Ensembles von Quarzglas-Bauteilen, anhand denen eine Faser erhalten wird, eine Kernzone, eine die Kernzone umhüllende innere Mantelzone, eine die innere Mantelzone umgebende Ringzone aufweist. Um hiervon ausgehend ein Verfahren, ein rohrförmiges Halbzeug sowie ein Ensemble koaxialer Bauteile für die kostengünstige Herstellung einer optischen Faser zur Verfügung zu stellen, die sich durch eine hohe Qualität der Grenzfläche zwischen Kern und Mantel und eine geringe Biegeempfindlichkeit auszeichnet, wird erfindungsgemäß vorgeschlagen, dass das Quarzglas der Ringzone in Form eines Ringzonenrohres aus Quarzglas mit einem mittleren Fluorgehalt von mindestens 6000 Gew.-ppm bereitgestellt wird, das eine von einer Rohr-Innenoberfläche und einer Rohr-Außenoberfläche begrenzte Wandung aufweist, wobei über die Ringzonenrohr-Wandung ein radiales Fluor-Konzentrationsprofil eingestellt wird, das eine innere Fluor-Verarmungsschicht mit einer Schichtdicke von mindestens 1 µm und maximal 10 µm aufweist, in der der Fluorgehalt zur Rohr-Innenoberfläche hin abfällt und in einem oberflächennahen Bereich mit einer Dicke von 1 µm maximal 3000 Gew.-ppm beträgt.
Abstract:
A fused silica glass and a fused silica article having a combined concentration of at least one of OH and OD of up to about 50 ppm. The fused silica glass is formed by drying a fused silica soot blank or preform in an inert atmosphere containing a drying agent, followed by removal of residual drying agent from the dried soot blank by heating the dried soot blank in an atmosphere comprising an inert gas and of oxygen.
Abstract:
Disclosed are synthetic silica glass having a low polarization-induced birefringence, process for making the glass and lithography system comprising optical element made of the glass. The silica glass has a polarization-induced birefringence measured at 633 nm of less than about 0.1 nm/cm when subjected to excimer laser pulses at about 193 nm having a fluence of about 40 µJ•cm-2•pulse-1 and a pulse length of about 25 ns for 5 x 109 pulses.
Abstract translation:公开了具有低偏振诱发双折射的合成石英玻璃,用于制造玻璃的方法和包含由玻璃制成的光学元件的光刻系统。 当经受约193nm的准分子激光脉冲时,石英玻璃在633nm处测量的偏振诱发双折射小于约0.1nm / cm,脉冲约为40μJcm -2脉冲-1,脉冲长度约为 5 x 109脉冲为25 ns。
Abstract:
The present invention relates to a method for manufacturing a single mode optical fiber, and a method for fabricating a single mode optical fiber that has a waterproof and plastic property and a low hydroxy group at a wavelength of 1383 nm.
Abstract:
The invention includes methods and apparatus for depositing soot onto a glass surface to minimize water in the deposited soot and the diffusion of the water into the glass surface. The invention includes depositing a first layer of soot a on the glass surface at a first forward traverse rate and depositing a second layer of soot at a second forward traverse rate.