公开(公告)号：US20090168260A1

公开(公告)日：2009-07-02

申请号：US12005558

申请日：2007-12-26

申请人： Donald G. Allen ,  Hieu Lam ,  Terence Tin-Lok Lam ,  Steve C. Puga

发明人： Donald G. Allen ,  Hieu Lam ,  Terence Tin-Lok Lam ,  Steve C. Puga

IPC分类号： G11B5/33

CPC分类号： G11B5/3153 ,  G11B5/1278

摘要： Methods and structures for the fabrication of both thin film longitudinal and perpendicular write heads are disclosed. A unique feature of these write heads is the inclusion of layered return poles, which comprise alternating layers of 22/78 and 80/20 NiFe alloys. The alternating layers also vary in thickness, the 22/78 NiFe layers having a nominal thickness of 1500 angstroms and the 80/20 NiFe layers having a nominal thickness of about 75 angstroms. Head efficiency and signal to noise ratios are significantly improved in heads having layered return pole construction.

摘要翻译： 公开了用于制造薄膜纵向和垂直写入头的方法和结构。 这些写头的一个独特之处在于包含层叠的返回极，其包括22/78和80/20 NiFe合金的交替层。 交替层的厚度也变化，22/78 NiFe层的标称厚度为1500埃，而80/20 NiFe层的标称厚度为约75埃。 在具有分层回极结构的头部中，头部效率和信噪比显着提高。

公开(公告)号：US07933096B2

公开(公告)日：2011-04-26

申请号：US12005558

申请日：2007-12-26

申请人： Donald G. Allen ,  Hieu Lam ,  Terence Tin-Lok Lam ,  Steve C. Puga

发明人： Donald G. Allen ,  Hieu Lam ,  Terence Tin-Lok Lam ,  Steve C. Puga

IPC分类号： G11B5/33

CPC分类号： G11B5/3153 ,  G11B5/1278

摘要： Methods and structures for the fabrication of both thin film longitudinal and perpendicular write heads are disclosed. A unique feature of these write heads is the inclusion of layered return poles, which comprise alternating layers of 22/78 and 80/20 NiFe alloys. The alternating layers also vary in thickness, the 22/78 NiFe layers having a nominal thickness of 1500 angstroms and the 80/20 NiFe layers having a nominal thickness of about 75 angstroms. Head efficiency and signal to noise ratios are significantly improved in heads having layered return pole construction.

摘要翻译： 公开了用于制造薄膜纵向和垂直写入头的方法和结构。 这些写头的一个独特之处在于包含层叠的返回极，其包括22/78和80/20 NiFe合金的交替层。 交替层的厚度也变化，22/78 NiFe层的标称厚度为1500埃，而80/20 NiFe层的标称厚度为约75埃。 在具有分层回极结构的头部中，头部效率和信噪比显着提高。