Patent ID: 7835111
Filing Date: 2010-11-16
Classification: G11B

Abstract:
1. A magnetic write head, comprising: a magnetic write pole having an end disposed toward an air bearing surface; a magnetic trailing shield separated from the write pole by a non-magnetic trailing gap, the trailing shield having a trailing edge and having a front edge exposed at the air bearing surface and a back edge opposite the front edge, the distance between the front and back edges of the trailing shield defining a trailing shield throat height; and a non-magnetic fill layer contacting the back edge of the trailing shield and having a surface, the surface of the fill layer and the trailing edge of the trailing shield forming a coplanar surface; and a magnetic return pole contacting the coplanar surface in a region that defines a return pole throat height the throat height of the return pole being at least 5 times the throat height of the trailing shield.