Patent ID: 6593736
Filing Date: 2003-07-15
Classification: B82Y,G11B,Y10T

Abstract:
An apparatus for repairing a merged magnetoresistive read-write head comprising a repair means collection including:means for a write current source applying a write current level onto a write differential signal pair controlling a magnetic field produced by a write head contained in said merged magnetoresistive read-write head to induce a temperature rise in a read head contained in said merged magnetoresistive read-write head; means for a read current source applying a read current bias onto a read differential signal pair coupled to said read head to create a magnetic field within said read head; and means for maintaining said write current level onto said write differential signal pair and said read current bias onto said read differential signal pair for at least a time period; and said apparatus further comprising: means for determining performance of said merged magnetoresistive read-write head to create a performance evaluation; means for passing said merged magnetoresistive read-write head when said performance evaluation indicates passing; means for altering at least one member of a repair parameter collection based upon said performance evaluation when said performance evaluation indicates not passing; means for collectively operating said repair means collection with said repair parameter collection when said performance evaluation indicates not passing; wherein said repair parameter collection is comprised of: said write current level, said read current level and said time period; wherein said write current level induces said temperature rise at said read head of essentially one hundred degrees Celsius; wherein said merged magnetoresistive read-write head is essentially free of an external magnetic influence; and wherein said means for said write current and said means for said read current collectively induce said read head to pass a blocking temperature.