Method of making second pole tip of a write head with a narrow track width

摘要

A method is provided for forming a final second pole tip of a write head wherein the final second pole tip is bounded in part by a final top and final first and second side walls, the final first and second side walls being separated by a final track width at an air bearing surface (ABS). The method includes the steps of forming a preliminary second pole tip that is bounded in part by the final top and preliminary first and second side walls. The preliminary first and second side walls are separated by a preliminary width at the ABS that is wider than the final track width. Next, a non-magnetic sacrificial layer is formed on the final top of the preliminary second pole tip. Ion beam milling is then employed for milling the preliminary first and second side walls to form the final second pole tip with the final first and second side walls separated by the final track width with at least a portion of the sacrificial layer remaining on the final top of the final second pole tip.