Two dimensional magnetic read head having asymmetrical secondary read elements

摘要

A magnetic read head configured for two dimensional magnetic recording and having asymmetrical secondary read elements. The magnetic read head includes a primary read element configured to read a data track (i.e. n data track) and first and second secondary read elements located over adjacent data tracks (i.e. n+1, n−1 data track) at either side of the data track to be read. The secondary read element have asymmetrical off track amplitude profiles, preferably such that they each have a steep amplitude profile at the outer side and a broader cross-track amplitude profile at their inner sides. This allows the secondary read elements to detect signals of the adjacent data track (so that those signals can be subtracted out of the signal from the primary reader) without the secondary read elements also picking up further adjacent data tracks (i.e. n+2, n−2).

主权项

1. A magnetic read head, comprising:
a primary read element; and at least one secondary read element, the secondary read element having an asymmetrical cross track amplitude profile; wherein the secondary read element is located in an off track location, and wherein the asymmetrical read profile includes a steep profile at an outer side away from the primary read element and a relatively wider read profile at an inner side toward the primary read element.