公开(公告)号：US07985494B2

公开(公告)日：2011-07-26

申请号：US12275576

申请日：2008-11-21

申请人： Nobuaki Orita ,  Yasuhiro Naka

发明人： Nobuaki Orita ,  Yasuhiro Naka

IPC分类号： G11B5/84 ,  G11B5/706

CPC分类号： G11B5/7315 ,  C03C19/00 ,  G11B5/82

摘要： A glass substrate for a magnetic disk satisfies Ra1≦0.8 [nm], 0 [nm]≦Ra1−Ra2≦0.2 [nm], Wa1≦0.6 [nm], and 0 [nm]≦Wa2−Wa1≦0.2 [nm]. Ra1 is an average surface roughness of a first annular area between 1 mm and 3 mm outward from an inner periphery of a main surface of the glass substrate, Ra2 is an average surface roughness of a second annular area between 1 mm and 3 mm inward from an outer periphery of the main surface, Wa1 is an average waviness of the first area in a circumferential direction of the glass substrate having a cycle of 300 μm to 5 mm, and Wa2 is an average waviness of the second area in the circumferential direction having a cycle of 300 μm to 5 mm.

摘要翻译： 用于磁盘的玻璃基板满足Ra1＆nlE; 0.8 [nm]，0 [nm]和nlE; Ra1-Ra2＆nlE; 0.2 [nm]，Wa1＆nlE; 0.6 [nm]和0 [nm]＆nlE; Wa2-Wa1＆ nm]。 Ra1是从玻璃基板的主表面的内周向外侧的1mm〜3mm之间的第一环状区域的平均表面粗糙度，Ra2是从1mm到3mm之间的第二环状区域的平均表面粗糙度 主表面的外周，Wa1是具有300μm〜5mm的周期的玻璃基板的周向的第一区域的平均波纹度，Wa2是周向的第二区域的平均波纹度，具有 一个300μm到5 mm的循环。

公开(公告)号：US07976967B2

公开(公告)日：2011-07-12

申请号：US12267917

申请日：2008-11-10

申请人： Hiroshi Kuraseko ,  Nobuaki Orita ,  Yasuhiro Naka

发明人： Hiroshi Kuraseko ,  Nobuaki Orita ,  Yasuhiro Naka

IPC分类号： G11B5/65 ,  G11B5/33 ,  B32B3/10

CPC分类号： G11B5/7315 ,  G11B5/54 ,  G11B5/82 ,  G11B21/12 ,  G11B21/22 ,  Y10T428/21

摘要： A main surface of a glass substrate for a magnetic disk is disk-shaped and has a ski jump on an outer peripheral end portion of the main surface opposing a magnetic head slider to be loaded. A rate of change of angles of tangents to a slope of the ski jump in a radial direction in a range between an inner circumferential side and a transition point on the slope is equal to or less than 10/W μrad/mm where W is a width of the magnetic head slider.

摘要翻译： 用于磁盘的玻璃基板的主表面是盘形的，并且在与要装载的磁头滑块相对的主表面的外周端部上具有滑行跳台。 在斜坡上的内周侧和过渡点之间的范围内的切线角与径向滑动坡度的斜率的变化率等于或小于10 /Wμrad/ mm，其中W是 磁头滑块的宽度。

公开(公告)号：US20090239101A1

公开(公告)日：2009-09-24

申请号：US12367632

申请日：2009-02-09

申请人： Norihisa SHIBAYAMA ,  Yasuhiro Naka ,  Nobuaki Orita

发明人： Norihisa SHIBAYAMA ,  Yasuhiro Naka ,  Nobuaki Orita

IPC分类号： G11B5/70

CPC分类号： G11B5/7315 ,  G11B5/8404

摘要： A plurality of recording magnetization portions is arranged in a concentric manner around a center of a glass substrate. A plurality of non-magnetization portion having a thermal conductivity lower than that of the recording magnetization portions is formed each between adjacent recording magnetization portions along a circumferential direction on a main surface of the glass substrate. A mean squared roughness of a surface of an area where each of the non-magnetization portions is formed is equal to or smaller than 1 nanometer.

摘要翻译： 多个记录磁化部分围绕玻璃基板的中心以同心的方式布置。 在玻璃基板的主表面上沿着圆周方向在相邻的记录磁化部分之间形成导热率低于记录磁化部分的多个非磁化部分。 其中形成每个非磁化部分的区域的表面的均方粗糙度等于或小于1纳米。

公开(公告)号：US06543257B1

公开(公告)日：2003-04-08

申请号：US09545673

申请日：2000-04-07

申请人： Hisashi Koaizawa ,  Nobuaki Orita ,  Junichi Takeda ,  Satoshi Sugiyama ,  Yoshiyuki Sakamoto

发明人： Hisashi Koaizawa ,  Nobuaki Orita ,  Junichi Takeda ,  Satoshi Sugiyama ,  Yoshiyuki Sakamoto

IPC分类号： C03B37014

CPC分类号： C03B37/01486 ,  C03B37/0146

摘要： A porous optical fiber preform dehydration and sintering apparatus capable of improving the sealing performance between an upper lid and an elevating shaft and between the upper lid and a furnace tube or a furnace body, wherein an upper opening of a furnace tube for accommodating a porous optical fiber preform is shut by the upper lid, a preform holder is provided at the bottom end of an elevating shaft passing through the upper lid to be freely elevated therethrough, the porous optical fiber preform in the furnace tube is heated by a heater provided around the outer circumference of the furnace tube, the upper lid is formed by a metal, the preform holder is formed by a quartz glass or a ceramic, a corrosion-resistant layer is provided on an inner surface of the upper lid, a seal member made of rubber or resin is provided in an elevating shaft passage of the upper lid.

摘要翻译： 一种能够改善上盖和升降杆之间以及上盖与炉管或炉体之间的密封性能的多孔光纤预制件脱水烧结装置，其中，用于容纳多孔光学的炉管的上部开口 纤维预成型件被上盖关闭，在通过上盖的提升轴的底端设有预制件保持架，以便自由升高，炉管中的多孔光纤预制件被加热器加热， 炉管的外周，上盖由金属形成，预成型机架由石英玻璃或陶瓷形成，耐腐蚀层设置在上盖的内表面上，密封构件由 橡胶或树脂设置在上盖的升降轴通道中。