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    • 41. 发明专利
    • DE102005017739B4
    • 2009-11-05
    • DE102005017739
    • 2005-04-15
    • HERAEUS QUARZGLAS
    • WEBER JUERGENPOGGE TOBIASTROMMER MARTINKUEHN BODOKIRST ULRICHWERDECKER WALTRAUD
    • C03C3/06H01L21/68
    • An ideal quartz glass for a wafer jig for use in an environment having an etching effect is distinguished by both high purity and high resistance to dry etching. To indicate a quartz glass that substantially fulfills these requirements, it is suggested according to the invention that the quartz glass is doped with nitrogen at least in a near-surface area, has a mean content of metastable hydroxyl groups of less than 30 wt ppm and that its fictive temperature is below 1250° C. and its viscosity is at least 1013 dPa·s at a temperature of 1200° C. An economic method for producing such a quartz glass comprises the following method steps: melting an SiO2 raw material to obtain a quartz glass blank, the SiO2 raw material or the quartz glass blank being subjected to a dehydration measure, heating the SiO2 raw material or the quartz glass blank to a nitriding temperature in the range between 1050° C. and 1850° C. in an ammonia-containing atmosphere, a temperature treatment by means of which the quartz glass of the quartz glass blank is set to a fictive temperature of 1250° C. or less, and a surface treatment of the quartz glass blank with formation of the quartz glass jig.
    • 50. 发明专利
    • DE102004017031B4
    • 2008-10-23
    • DE102004017031
    • 2004-04-02
    • HERAEUS QUARZGLAS
    • KUEHN BODOTHOMAS STEPHANKAISER STEFFEN
    • C03C3/06C03B19/14C03B20/00C03C4/00G02B1/00G03F7/20H01L21/027
    • Optical component comprises a quartz glass having a hydrogen content of 0.1 X 10 16>-5 X 10 16> molecules/cm 3> and a content of silicon hydride groups of less than 5 X 10 16> molecules/cm 3>. The quartz glass has a content of hydroxyl groups of 10-250 weight ppm and a fictive temperature of 1000[deg]C. Independent claims are also included for: (a) producing an optical component of quartz glass, comprising producing silicon dioxide (SiO 2) soot body, vitrifying the soot body in a vacuum, annealing the quartz glass blank to form a quartz glass cylinder surrounding a contour of the optical component to be produced with an over dimension, removing part of the overdimension adjacent the axial ends of the quartz glass cylinder, and loading the quartz glass cylinder with hydrogen by heating the quartz glass cylinder in a hydrogen-containing atmosphere at a temperature below 500[deg]C; and (b) an immersion lithography comprising providing an optical component in a projection system of an automatic exposure machine for immersion lithography, and transmitting ultraviolet, pulsed and linearly polarized UV laser radiation of a wavelength of 190-250 nm through the optical component.