Stack with wide seed layer

摘要

A stack having a seed layer structure with a first part having a first cross-track width and a free layer deposited over the seed layer structure and with a second cross-track width, wherein the first cross-track width is greater than the second cross-track width. In one implementation, the seed layer structure further comprises an antiferromagnetic (AFM) layer and a synthetic antiferromagnetic (SAF) layer. In one alternate implementation, the cross-track width of the seed layer structure is substantially equal to the combined cross-track width of the free layer and cross-track width of two permanent magnets.

主权项

1. A magnetoresistive sensor comprising:
a seed layer structure with a first part having a first cross-track width; a free layer deposited over the seed layer structure and with a second cross-track width; and wherein the seed layer structure comprises an antiferromagnetic (AFM) layer and the AFM layer and the free layer do not overlap in a cross-track direction and wherein the first cross-track width is greater than the second cross-track width.