Patent ID: 8070554

Claim:
A method for lapping a read/write head comprising: performing a first lapping process on a structure having said read/write head fabricated therein, said first lapping process providing a course lapping of a first resistive region of said structure, said first lapping process stopping after achieving a first lapping benchmark resistance; and performing a second and final lapping process on said structure at a second resistive region to expose a sensor coupled with said read/write head, said second lapping process performing a finer lapping at a rate lesser than said first lapping process, said second lapping process stopping said lapping after an exponential increase in said sensor signal amplitude from said sensor coupled with said read/write head is detected, said second resistive region interposed between said first resistive region and said read/write head, said second resistive region having a higher resistive value that said first resistive region.