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发明授权
US4860140A Magnetic head closure having ferrite substrate and closure and conductive thin film coil deposited in recess of substantially same shape in ferrite substrate 失效
具有铁氧体衬底的磁头封盖和在铁氧体衬底中沉积在基本相同形状的凹陷中的闭合和导电薄膜线圈

Magnetic head closure having ferrite substrate and closure and conductive thin film coil deposited in recess of substantially same shape in ferrite substrate
摘要：
The magnetic head according to the present invention has a ferrite substrate and closure. The ferrite substrate has formed therein a first recess in which a conductive coil is to be deposited, while the ferrite closure has formed therein a second recess enclosing a portion of the conductive coil that is contributed to at least signal transducing. The end of the second recess is disposed in a position related with the depth of the tranducing gap. Since the first recess in which the conductive coil is deposited has no influence on the magnetic transducing efficiency, it can be much freely formed by photolithography or reactive ion etching. Also since the second recess having an influence on the magnetic transducing efficiency can be formed by precision machining, no advanced process control is needed.
摘要（中）：

根据本发明的磁头具有铁氧体衬底和封闭件。 铁氧体衬底在其中形成有要沉积导电线圈的第一凹部，而铁氧体封闭件在其中形成有封闭导电线圈的至少有助于至少信号传导的部分的第二凹部。 第二凹部的端部设置在与调节间隙的深度相关的位置。 由于其中沉积导电线圈的第一凹槽对磁转换效率没有影响，所以可以通过光刻或反应离子蚀刻来自由地形成。 此外，由于可以通过精密加工形成对磁转换效率有影响的第二凹部，因此不需要先进的工艺控制。

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