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公开(公告)号：US5140486A
公开(公告)日：1992-08-18
申请号：US612846
申请日：1990-11-14
CPC分类号： G11B5/012 , G11B5/1878 , G11B5/3109 , G11B5/82
摘要： Information is magnetically recorded in and reproduced from a magnetic disk using a flying magnetic head. The disk is a coating type disk comprising a rigid substrate having a magnetic layer coated thereon from a magnetic coating composition of ferromagnetic submicron particles in a binder. High density recording is possible when the magnetic layer having a coercive force of at least 1100 Oe and a thickness of up to 0.5 .mu.m is combined with the flying magnetic head whose gap adjoining portion is made of a soft magnetic material having a saturation magnetic flux density of at least 0.7 T.
摘要翻译： 使用飞行磁头将信息磁记录在磁盘上并从磁盘中再现。 盘是包括刚性衬底的涂层型盘，该刚性衬底具有由粘合剂中的铁磁亚微米颗粒的磁性涂层组合物涂覆在其上的磁性层。 当具有至少1100Oe的矫顽力和至多0.5μm的厚度的磁性层与其间隙邻接部分由具有饱和磁通量的软磁材料制成的飞行磁头组合时，可以进行高密度记录 密度至少为0.7T。
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公开(公告)号：US5182693A
公开(公告)日：1993-01-26
申请号：US883250
申请日：1992-05-08
摘要： A magnetic disk suitable for high density recording and reproduction of information wherein said disk is a coating type disk comprising a rigid substrate having a magnetic layer coated thereon from a magnetic coating composition of ferromagnetic submicron particles in a binder, wherein the substrate has a surface roughness Ra of up to 0.007 .mu.m, the magnetic layer has a thickness of up to 0.5 .mu.m, a surface roughness Ra of up to 0.005 .mu.m, and a porosity of 4 to 45%.
摘要翻译： 一种适用于高密度记录和再现信息的磁盘，其中所述盘是涂层型盘，包括由粘合剂中的铁磁亚微米颗粒的磁性涂层组合物涂覆有磁性层的刚性基底，其中所述基底具有表面粗糙度 Ra为0.007μm，磁性层的厚度为0.5μm，表面粗糙度Ra为0.005μm以下，孔隙率为4〜45％。
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公开(公告)号：US5160761A
公开(公告)日：1992-11-03
申请号：US856703
申请日：1992-03-24
CPC分类号： G11B5/78 , G11B5/845 , Y10S428/90
摘要： Information is magnetically recorded in and reproduced from a magnetic disk using a flying magnetic head. The disk is a coating type disk comprising a rigid substrate having a magnetic layer coated thereont from a magnetic coating composition of ferromagnetic submicron particles in a binder. High density recording is possible when the substrate has a surface roughness Ra of up to 0.007 .mu.m, the magnetic layer has a thickness of up to 0.5 .mu.m, a surface roughness Ra of up to 0.005 .mu.m, and a porosity of 4 to 45%.
摘要翻译： 使用飞行磁头将信息磁记录在磁盘上并从磁盘中再现。 盘是包括刚性基底的涂层型盘，该刚性基底具有由粘合剂中的铁磁亚微米颗粒的磁性涂层组合物涂覆的磁性层。 当基板的表面粗糙度Ra高达0.007μm时，可以进行高密度记录，磁性层的厚度可达0.5μm，表面粗糙度Ra可达0.005μm，孔隙率为4〜 45％。
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