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1.发明公开
公开(公告)号：EP1503373A1
公开(公告)日：2005-02-02
申请号：EP04017016.9
申请日：2004-07-19
IPC分类号： G11B5/31
CPC分类号： G11B5/3136 , G11B5/012 , G11B5/17 , G11B5/3116 , G11B5/313 , G11B5/40
摘要： Magnetic heads having write coil structures with reduced electrical resistances for reducing thermal protrusion are disclosed. In one illustrative example, a magnetic head (1000) includes a magnetic yoke (1070); a write gap layer (1018) formed between upper and lower poles of the magnetic yoke; and a write coil having a plurality of coil layers. Each coil layer (1024) of the write coil (1022) extends continuously between the upper and the lower poles through a plane defined by the write gap layer (1018). Preferably, the write coil is formed using a damascene process, such that each coil layer (1024) is wider than each coil separating layer (1026). Such a structure provides for a relatively large amount of coil materials to be used, which reduces the coil's electrical resistance. This, in turn, reduces the heat generated by the write coils during operation. Further, either one or both of the lower and upper poles may include a horizontally laminated structure (1102,1202) of alternating magnetic and non-magnetic dielectric layers to further reduce heating caused by eddy current losses. Since thermal protrusion is reduced, the fly height of magnetic head may be made relatively small with a reduced risk of head-to-disk crashes and disk scratches.
摘要翻译： 公开了具有减小电阻以减少热突起的写入线圈结构的磁头。 在一个说明性示例中，磁头（1000）包括磁轭（1070）; 形成在所述磁轭的上下极之间的写入间隙层（1018） 以及具有多个线圈层的写入线圈。 写入线圈（1022）的每个线圈层（1024）通过由写入间隙层（1018）限定的平面在上极和下极之间连续延伸。 优选地，使用镶嵌工艺形成写入线圈，使得每个线圈层（1024）比每个线圈分离层（1026）宽。 这种结构提供了相对大量的待使用的线圈材料，这降低了线圈的电阻。 这又减少了在操作期间由写入线圈产生的热量。 此外，下极和上极中的一个或两个可以包括交替的磁和非磁性介电层的水平层叠结构（1102,1202），以进一步减少由涡流损耗引起的加热。 由于热突起减小，所以磁头的飞行高度可以相对较小，同时降低了磁盘与磁盘的碰撞和盘划伤的风险。
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公开(公告)号：EP1933307A2
公开(公告)日：2008-06-18
申请号：EP07013734.4
申请日：2007-07-12
IPC分类号： G11B5/39
CPC分类号： G11B5/3929 , B82Y25/00 , G01R33/093 , G11B5/3912 , G11B5/398
摘要： An improved magnetic head for a hard disk drive including a lead overlaid read head in which the read width and read gap are reduced. The read width, which corresponds to the distance between the inner ends of the overlaid electrical leads, is reduced by the fabrication of a thin read width insulation member prior to the fabrication of the overlaid electrical leads. The read gap is reduced by fabricating the overlaid electrical leads from a magnetic, electrically conductive material such as NiFe, whereby the overlaid electrical leads also function as a magnetic shield. The read gap, which is the distance between the first and second magnetic shields is thus reduced as compared to the prior art by the thickness of the electrical leads and the thickness of the prior art second insulation layer formed between the electrical leads and the second magnetic shield.
摘要翻译： 一种用于硬盘驱动器的改进的磁头，该硬盘驱动器包括引线叠置的读取头，其读取宽度和读取间隙减小。 通过在制造叠置的电引线之前制造薄的读取宽度绝缘构件，减少了与叠加的电引线的内端之间的距离相对应的读取宽度。 通过由诸如NiFe的磁性导电材料制造叠加的电引线来减小读取间隙，由此叠加的电引线也用作磁屏蔽。 与现有技术相比，第一磁屏蔽和第二磁屏蔽之间的距离的读取间隙因此被减小了电引线的厚度和在电引线和第二磁引线之间形成的现有技术第二绝缘层的厚度 屏蔽。
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公开(公告)号：EP1503373B1
公开(公告)日：2008-12-31
申请号：EP04017016.9
申请日：2004-07-19
IPC分类号： G11B5/31
CPC分类号： G11B5/3136 , G11B5/012 , G11B5/17 , G11B5/3116 , G11B5/313 , G11B5/40
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公开(公告)号：EP1933307A3
公开(公告)日：2008-10-29
申请号：EP07013734.4
申请日：2007-07-12
IPC分类号： G11B5/39
CPC分类号： G11B5/3929 , B82Y25/00 , G01R33/093 , G11B5/3912 , G11B5/398
摘要： An improved magnetic head for a hard disk drive including a lead overlaid read head in which the read width and read gap are reduced. The read width, which corresponds to the distance between the inner ends of the overlaid electrical leads, is reduced by the fabrication of a thin read width insulation member prior to the fabrication of the overlaid electrical leads. The read gap is reduced by fabricating the overlaid electrical leads from a magnetic, electrically conductive material such as NiFe, whereby the overlaid electrical leads also function as a magnetic shield. The read gap, which is the distance between the first and second magnetic shields is thus reduced as compared to the prior art by the thickness of the electrical leads and the thickness of the prior art second insulation layer formed between the electrical leads and the second magnetic shield.
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