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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

Process for producing a pole-trimmed writer in a magnetoresistive
read/write head and a data transducer made thereby
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.
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