公开(公告)号：US07190552B2

公开(公告)日：2007-03-13

申请号：US11375160

申请日：2006-03-14

申请人： Wen-chien David Hsiao ,  Edward Hin Pong Lee ,  Vladimir Nikitin ,  Samuel Weisan Yuan

发明人： Wen-chien David Hsiao ,  Edward Hin Pong Lee ,  Vladimir Nikitin ,  Samuel Weisan Yuan

IPC分类号： G11B5/17

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 includes a magnetic yoke; a write gap layer formed between upper and lower poles of the magnetic yoke; and a write coil having a plurality of coil layers. Each coil layer of the write coil extends continuously between the upper and the lower poles through a plane defined by the write gap layer. Preferably, the write coil is formed using a damascene process, such that each coil layer is wider than each coil separating layer. 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 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： 公开了具有降低的电阻以减少热突起的具有写入线圈结构的磁头。 在一个说明性示例中，磁头包括磁轭; 形成在磁轭的上下极之间的写间隙层; 以及具有多个线圈层的写入线圈。 写入线圈的每个线圈层通过由写入间隙层限定的平面在上极和下极之间连续延伸。 优选地，写入线圈使用镶嵌工艺形成，使得每个线圈层比每个线圈分离层宽。 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，以进一步减少由涡流损耗引起的加热。 由于热突起减少，所以磁头的飞行高度可以相对较小，同时降低了磁头与磁盘的碰撞和磁盘划痕的风险。

公开(公告)号：US07079353B2

公开(公告)日：2006-07-18

申请号：US10629060

申请日：2003-07-29

申请人： Wen-chien David Hsiao ,  Edward Hin Pong Lee ,  Vladimir Nikitin ,  Samuel Weisan Yuan

发明人： Wen-chien David Hsiao ,  Edward Hin Pong Lee ,  Vladimir Nikitin ,  Samuel Weisan Yuan

IPC分类号： G11B5/17

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 includes a magnetic yoke; a write gap layer formed between upper and lower poles of the magnetic yoke; and a write coil having a plurality of coil layers. Each coil layer of the write coil extends continuously between the upper and the lower poles through a plane defined by the write gap layer. Preferably, the write coil is formed using a damascene process, such that each coil layer is wider than each coil separating layer. 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 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： 公开了具有降低的电阻以减少热突起的具有写入线圈结构的磁头。 在一个说明性示例中，磁头包括磁轭; 形成在磁轭的上下极之间的写间隙层; 以及具有多个线圈层的写入线圈。 写入线圈的每个线圈层通过由写入间隙层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，使得每个线圈层比每个线圈分离层宽。 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，以进一步减少由涡流损耗引起的加热。 由于热突起减少，所以磁头的飞行高度可以相对较小，同时降低了磁头与磁盘的碰撞和磁盘划痕的风险。