Method of making ultra-dry, Cl-free and F-doped high purity fused silica
    81.
    发明申请
    Method of making ultra-dry, Cl-free and F-doped high purity fused silica 审中-公开
    制造超干,无Cl和F掺杂的高纯度熔融石英的方法

    公开(公告)号:US20040118155A1

    公开(公告)日:2004-06-24

    申请号:US10326200

    申请日:2002-12-20

    Abstract: The present invention is directed to a method of making an ultra dry high purity, Cl-free, F doped fused silica glass. Silica powder or soot preforms are used to form a glass under conditions to provide a desired level of F doping while reducing the Cl and nullOH concentrations to trace levels. The method includes providing a glass precursor in the from of a silica powder or soot preform. The powder is heated in a furnace. The powder is exposed to a F-species at a predetermined temperature and time sufficient to melt the powder and form a high purity fused silica glass in the bottom of said furnace.

    Abstract translation: 本发明涉及一种制备超干高纯度无Cl掺杂熔融石英玻璃的方法。 使用二氧化硅粉末或烟灰预制件在条件下形成玻璃以提供期望的F掺杂水平,同时将Cl和OH浓度降低至痕量水平。 该方法包括从二氧化硅粉末或烟炱预制件中提供玻璃前体。 粉末在炉中加热。 粉末在预定温度和时间下暴露于F-物质,足以熔化粉末并在所述炉底部形成高纯度熔融石英玻璃。

    Projection lithography photomasks and method of making
    82.
    发明授权
    Projection lithography photomasks and method of making 失效
    投影光刻光掩模和制作方法

    公开(公告)号:US06689516B2

    公开(公告)日:2004-02-10

    申请号:US09935990

    申请日:2001-08-23

    Abstract: The present invention is a method of making a lithography photomask and photomask blank. The method of making the lithography photomask and photomask blank includes providing a silicon oxyfluoride glass tube having an OH content less than 50 ppm. The method further includes cutting the silicon oxyfluoride glass tube, flattening the silicon oxyfluoride glass tube, and forming the flattened cut silicon oxyfluoride glass tube into a photomask blank having a planar surface. The present invention includes a glass lithography mask preform. The glass lithography mask preform is a longitudinal silicon oxyfluoride glass tube that has an OH content ≦10 ppm, a F wt. % concentration ≧0.5 wt. %.

    Abstract translation: 本发明是制造光刻光掩模和光掩模坯料的方法。 制造光刻光掩模和光掩模坯料的方法包括提供OH含量低于50ppm的氟氧化硅玻璃管。 该方法还包括切割氟氧化硅玻璃管,使氟氧化硅玻璃管扁平化,并将扁平切割的氟氧化硅玻璃管形成具有平坦表面的光掩模坯料。 本发明包括玻璃光刻掩模预制件。 玻璃光刻掩模预制件是具有OH含量<= 10ppm的纵向硅氧氟化物玻璃管,F wt。 %浓度> = 0.5wt。 %。

    Synthetic silica glass and its manufacturing method
    89.
    发明授权
    Synthetic silica glass and its manufacturing method 有权
    合成石英玻璃及其制造方法

    公开(公告)号:US06442973B1

    公开(公告)日:2002-09-03

    申请号:US09235409

    申请日:1999-01-22

    Abstract: A method is provided for manufacturing a synthetic silica glass. The method includes the steps of maintaining a silica glass member, which is formed using a flame hydrolysis method and having an OH group concentration of about 500 ppm to about 1300 ppm, at a predetermined holding temperature for a predetermined period of time so as to substantially relax the structure of the silica glass member. The method further includes the step of subsequently cooling the silica glass member to a first predetermined temperature at a cooling rate of about 10 K/hour or less, and thereafter, cooling the silica glass member to a second predetermined temperature at a cooling rate of about 1 K/hour or less. The method further includes the step of further cooling the silica glass member to a third predetermined temperature at a cooling rate of about 10 K/hour or less.

    Abstract translation: 提供了一种制造合成石英玻璃的方法。 该方法包括以下步骤:在预定的保持温度下,使用火焰水解法形成并具有约500ppm至约1300ppm的OH基浓度的二氧化硅玻璃构件, 放松石英玻璃构件的结构。 该方法还包括以约10K /小时以下的冷却速度随后将石英玻璃构件冷却至第一预定温度的步骤,然后以大约的冷却速度将石英玻璃构件冷却至第二预定温度 1 K /小时以下。 该方法还包括以约10K /小时或更低的冷却速度将石英玻璃构件进一步冷却至第三预定温度的步骤。

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