发明名称 |
Thin film magnetic head, method of manufacturing the same, and magnetic recording apparatus |
摘要 |
A main magnetic pole layer is constructed so as to have a stacking structure in which a lower main magnetic pole layer having relative low saturated magnetic flux density and an exposed surface area is positioned on a leading side, and an upper main magnetic pole layer having relative high saturated magnetic flux density and having an exposed surface area is positioned on a trailing side. The exposed surface of a main magnetic pole layer has a planar shape of a bilaterally-symmetrical inverted trapezoidal shape in which a width of an upper edge is larger than a width of a lower edge and is equal to or larger than a width of the exposed surface of the main magnetic pole layer at an arbitrary intermediate position between the lower edge and the upper edge. In particular, a height at a center position in the exposed surface area in the upper main magnetic pole layer is larger than a height in the exposed surface area in an arbitrary peripheral position around the center point.
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申请公布号 |
US7626785(B2) |
申请公布日期 |
2009.12.01 |
申请号 |
US20060340763 |
申请日期 |
2006.01.27 |
申请人 |
SAE MAGNETICS (H.K.) LTD. |
发明人 |
MATONO NAOTO |
分类号 |
G11B5/147 |
主分类号 |
G11B5/147 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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