Second pole piece of a write head fabricated by high aspect ratio lithography and image transfer

摘要

A method of making a magnetic write head includes forming a strip of negative photoresist on a wafer at an ABS site with a width that defines a track width of the write head and which has a height above a desired height of a second pole tip. An alumina layer is formed on the wafer and on the strip with a thickness above the wafer that is equal to or greater than a desired height of the second pole tip. The alumina layer is then mechanically polished until the negative photoresist strip is exposed. The negative photoresist strip is then removed leaving an opening in the alumina layer after which the second pole tip is formed in the opening. In a first embodiment of the invention the second pole tip and the second pole piece yoke are one piece and are planar and in a second embodiment of the invention a P2 yoke is stitched to the second pole tip. In both embodiments the first pole piece of the write head can be notched without damaging the second pole tip.