Read sensor with self-aligned low resistance leads and method of making
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United States of America Patent
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N/A
Issued Date -
May 17, 2001
app pub date -
Jan 16, 2001
filing date -
Aug 24, 1998
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A read sensor with self-aligned low resistance leads and a method of making are provided. In the method a masking step has been eliminated by employing first, second and third protective capping layers in the construction of the read sensor and first and second lead layers. The first capping layer serves as a protective layer for the read sensor sites, the second capping layer protects low resistance lead layer portions during removal of the first capping layer from high resistance lead layer sites and then serves as a sacrificial layer during removal of spin valve material from the low resistance lead layer sites. The third capping layer protects the first and second lead layers during milling of low resistance lead layer material in field regions about the read sensor and first and second lead layers. The method aligns front edges of the low resistance lead layer portions with a rear edge of the read sensor so as to lower the overall resistance of the lead layers.
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