发明授权
US6141183A Process for producing a pole-trimmed writer in a magnetoresistive
read/write head and a data transducer made thereby
失效
用于在磁阻读写头和由此制造的数据传感器中制造极修整写入器的处理
- 专利标题: Process for producing a pole-trimmed writer in a magnetoresistive read/write head and a data transducer made thereby
- 专利标题(中): 用于在磁阻读写头和由此制造的数据传感器中制造极修整写入器的处理
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申请号: US115147申请日: 1998-07-14
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公开(公告)号: US6141183A公开(公告)日: 2000-10-31
- 发明人: Andrew L. Wu , Paul Duval , Thomas Ferraguto
- 申请人: Andrew L. Wu , Paul Duval , Thomas Ferraguto
- 申请人地址: JPX Saijo
- 专利权人: Matsushita-Kotobukie Electronics Industries, Ltd.
- 当前专利权人: Matsushita-Kotobukie Electronics Industries, Ltd.
- 当前专利权人地址: JPX Saijo
- 主分类号: G11B5/23
- IPC分类号: G11B5/23 ; G11B5/31 ; G11B5/39
摘要:
A pole-trimmed writer for an MR read/write data transducer which may be produced without significant re-deposition of Al.sub.2 O.sub.3 or NiFe on the sides of the writer poles. The process disclosed herein advantageously provides an upper (top) pole which is processed to project a pair of relatively thin, laterally extending lower flanges, prior to the use of the upper pole as a mask to subsequent ion milling of the lower pole, or shared shield. In a preferred embodiment, the process for producing the flange is implemented in conjunction with the deposition of a single copper (Cu) or dual Al.sub.2 O.sub.3 and chromium (Cr) overlayers formed on the upper pole seed layer followed by the top pole formation and selective removal of a predetermined amount of the underlying portions of the gap material prior to a subsequent ion milling operation and further processing of the read/write head.
公开/授权文献
- US4871931A Logic circuit resistant to errors due to supply fluctuations 公开/授权日:1989-10-03
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