2533 磁気ディスク用ヘッドの熱突き出し解析 : 低熱膨張材料による熱突き出し抑制(S79-3 情報機器コンピュータメカニクス(3),S79 情報機器コンピュータメカニクス)

概要

論文の詳細を見る
Recent flying heights of magnetic head slider have been reduced to 10nm or less. Thermal pole-tip protrusion can further reduce flying clearance by a few nanometers and increase the risk of failure at the head-disk interface. The safety margin of the flying height decreases due to thermal pole-tip protrusion deformation. This deformation is caused both by mismatched thermal properties of the various materials used in the magnetic head and the temperature rise due to write current in the coil. We clearly identified the mechanism of this protrusion and accurately estimated its magnitude. In this study, we numerically analyzed the thermal pole-tip protrusion of magnetic head using low thermal expansion material. And our calculations showed that this magnetic head structure effectively controlled the thermal pole-tip protrusion.
社団法人日本機械学会の論文
2005-09-18