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1. 发明授权

US06426155B1 Magnetic hard disc substrate and process for manufacturing the same 有权
标题翻译：磁性硬盘基板及其制造方法
公开(公告)号：US06426155B1
公开(公告)日：2002-07-30
申请号：US09631575
申请日：2000-08-04
申请人： Kiyoshi Tada , Kenji Tomita , Kurata Awaya , Tomoya Utashiro
发明人： Kiyoshi Tada , Kenji Tomita , Kurata Awaya , Tomoya Utashiro
IPC分类号： G11B582
CPC分类号： G11B5/8404 , G11B5/82 , Y10T428/1275 , Y10T428/24355
摘要： A magnetic hard disc substrate made of an aluminum alloy for memory devices such as a computer must correspond to an improved structure in which the interval between a head and a medium is made narrower to attain high density recording. In order to prevent head crash, it is required that the magnetic hard disc substrate have a smooth surface and decreased defects. The present invention provides a process for manufacturing a magnetic hard disc substrate made of an aluminum alloy which satisfies the above requirements and also provides a disc substrate which has a surface roughness Ra≦0.5 nm and is free from abrasive flaws with a depth of 5 nm or more and from micro-waviness or provides a disc substrate which has a surface roughness Ra≦5 angstroms and a surface roughness Rmax≦80 angstroms and in which the number of scratches with a depth of 50 angstroms or more is 5 or less and the number of pits with a depth of 50 angstroms or less is 5 or less in the surface.
摘要翻译：用于计算机等存储装置的由铝合金制成的磁性硬盘基板必须对应于头部和介质之间的间隔变窄以达到高密度记录的改进结构。为了防止头部碰撞，需要磁性硬盘基板具有光滑的表面和减少的缺陷。本发明提供一种制造满足上述要求的由铝合金制成的磁性硬盘基板的方法，并且还提供了具有表面粗糙度Ra <= 0.5nm并且没有深度为5的磨料缺陷的圆盘基片 nm或更大，并且从微波纹或提供具有Ra <= 5埃的表面粗糙度和表面粗糙度Rmax <= 80埃的盘基片，其中深度为50埃或更多的划痕数为5或深度为50埃或更小的凹坑的数量在表面上为5或更小。

2. 发明授权

US6123603A Magnetic hard disc substrate and process for manufacturing the same 失效
标题翻译：磁性硬盘基板及其制造方法
公开(公告)号：US6123603A
公开(公告)日：2000-09-26
申请号：US94915
申请日：1998-06-12
申请人： Kiyoshi Tada , Kenji Tomita , Kurata Awaya , Tomoya Utashiro
发明人： Kiyoshi Tada , Kenji Tomita , Kurata Awaya , Tomoya Utashiro
IPC分类号： B24B1/00 , G11B5/82
CPC分类号： G11B5/8404 , G11B5/82 , Y10T428/1275 , Y10T428/24355
摘要： A magnetic hard disc substrate made of an aluminum alloy for memory devices such as a computer must correspond to an improved structure in which the interval between a head and a medium is made narrower to attain high density recording. In order to prevent head crash, it is required that the magnetic hard disc substrate have a smooth surface and decreased defects. The present invention provides a process for manufacturing a magnetic hard disc substrate made of an aluminum alloy which satisfies the above requirements and also provides a disc substrate which has a surface roughness Ra.ltoreq.0.5 nm and is free from abrasive flaws with a depth of 5 nm or more and from micro-waviness or provides a disc substrate which has a surface roughness Ra.ltoreq.5 angstroms and a surface roughness Rmax.ltoreq.80 angstroms and in which the number of scratches with a depth of 50 angstroms or more is 5 or less and the number of pits with a depth of 50 angstroms or less is 5 or less in the surface.
摘要翻译：用于计算机等存储装置的由铝合金制成的磁性硬盘基板必须对应于头部和介质之间的间隔变窄以达到高密度记录的改进结构。为了防止头部碰撞，需要磁性硬盘基板具有光滑的表面和减少的缺陷。本发明提供一种制造满足上述要求的由铝合金制成的磁性硬盘基板的方法，并且还提供了具有表面粗糙度Ra <0.5nm并且没有磨蚀缺陷的盘基片，其深度为 5nm以上，微波纹或提供具有表面粗糙度Ra 5埃，表面粗糙度Rmax <80埃的圆盘基板，其中深度为50埃以上的划痕数为5以下，深度为50埃以下的凹坑的数量在表面为5以下。

3. 发明授权

US06378338B1 Method for producing magnetic disk substrates 失效
标题翻译：磁盘基板的制造方法
公开(公告)号：US06378338B1
公开(公告)日：2002-04-30
申请号：US09385782
申请日：1999-08-30
申请人： Kurata Awaya , Kazuyoshi Nishizawa , Kiyoshi Tada
发明人： Kurata Awaya , Kazuyoshi Nishizawa , Kiyoshi Tada
IPC分类号： G11B566
CPC分类号： G11B5/8404 , C03C17/22 , C03C2217/283 , C03C2218/31 , C03C2218/32 , C23C18/1689 , C23C18/1893
摘要： Magnetic disk substrates are produced by subjecting glass substrates to at least steps of degreasing, etching, sensitization with tin chloride, activation and sensitivity-enhancing treatment in that order, then plating the pretreated substrates with a nickel/phosphorus film, and thereafter polishing the plated substrates. In the process, the substrates being processed are washed with hot pure water at a temperature of not lower than 50° C. for a period of from 20 to 90 seconds, after the sensitization step but before the activation step, and heated at a temperature of not lower than 70° C. for a period of from 5 to 100 minutes, after the sensitization step but before the nickel/phosphorus-plating step.
摘要翻译：磁盘基板是通过使玻璃基板至少进行脱脂，蚀刻，氯化锡敏化，激活和灵敏度增强处理的步骤，然后用镍/磷膜对预处理的基板进行电镀，然后研磨镀层底物。在此过程中，处理过的基材在致敏步骤之后激活步骤之前，在不低于50℃的温度下用热纯水洗涤20至90秒，并在温度下加热在感光步骤之后，但在镍/磷镀覆步骤之前，不低于70℃，时间为5至100分钟。

4. 发明授权

US06258458B1 Magnetic disk substrate 失效
标题翻译：磁盘基板
公开(公告)号：US06258458B1
公开(公告)日：2001-07-10
申请号：US09362973
申请日：1999-07-29
申请人： Kurata Awaya , Kazuyoshi Nishizawa , Kiyoshi Tada
发明人： Kurata Awaya , Kazuyoshi Nishizawa , Kiyoshi Tada
IPC分类号： B32B1706
CPC分类号： B32B17/06 , C03C17/06 , C03C2217/27 , C03C2218/32
摘要： A provision of a magnetic disk substrate using, as a plated substrate, glass with high hardness in place of aluminum. The magnetic disk substrate is small-sized, can stand against an impact when it is carried, and avoids leaving struck damages (head snap) even if it is used for recent note- or mobile-type computers having a head which is located as closely as possible to the substrate. The magnetic disk substrate comprises forming a nickel/phosphorus coating with a film thickness of 8 &mgr;m-20 &mgr;m or less on crystallized glass with a roughness Ra of 0.05 to 0.5 &mgr;m, the roughness being measured by a tracer and contact type roughness meter after the glass is ground (lapped) and polishing the nickel/phosphorus coating to a depth of 3 &mgr;m or more in a polishing process with the thickness of the plating film left unremoved being 5 &mgr;m or more.
摘要翻译：使用具有高硬度的玻璃代替铝的作为电镀基板的磁盘基板的设置。磁盘基板尺寸小，可以在承载时抵抗冲击，并且避免留下撞击损坏（头部卡扣），即使它用于最近的笔记本或移动式计算机，其头部位于紧密的位置尽可能地与基底。磁盘基板包括在结晶玻璃上形成厚度为8mum-20μm或更小的镍/磷涂层，其粗糙度Ra为0.05-0.5μm，粗糙度通过示踪剂和接触型粗糙度仪测量在抛光过程中将玻璃研磨（研磨）并抛光镍/磷涂层至3μm或更深的深度，镀膜的厚度不得超过5μm或更大。

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