Patent ID: 9711168
Date: 2017-07-18
CPC Classifications: G11B

Claim:
1. A method for providing magnetic write apparatus having a media-facing surface (MFS) comprising: providing a side shield location layer covering at least part of a MFS location corresponding to the MFS, the side shield location layer having a back surface and at least one side surface, a portion of the back surface corresponding to a side shield back surface of at least one side shield, at least part of the side shield location layer having a location corresponding to the at least one side shield, the back surface being separated from the MFS location along a yoke direction substantially perpendicular to the MFS location; providing a nonmagnetic layer adjoining the back surface and the at least one side surface of the side shield location layer, the nonmagnetic layer and the side shield location layer forming an intermediate layer; providing a pole trench in the intermediate layer using a first etch, the pole trench including a nonmagnetic layer portion and a side shield location layer portion, the at least one side surface of the side shield location layer being separated from the side shield location layer portion of the pole trench along a cross-track direction, the nonmagnetic layer and the side shield location layer having an etch selectivity of at least 0.9 and not more than 1.1 for the first etch, the pole trench having a pole trench shape and a pole trench location corresponding to a pole; providing the pole in the pole trench, a portion of the side shield location layer residing under a portion of the pole after the step of providing the pole; removing a remaining portion of the side shield location layer using a wet etch, the side shield location layer being removable by the wet etch, the nonmagnetic layer being nonremovable by the wet etch, the remaining portion of the side shield location layer includes the portion of the side shield location layer under the pole; providing in the location the at least one side shield having a side shield back surface substantially the same as the portion of the back surface; and providing at least one coil for energizing the pole.