Perpendicular magnetic recording write head with plate having coil regions and heat-sink regions

摘要

A magnetic recording write head has a continuous electrically conductive plate with an aperture, a coil region around the aperture and heat-sink regions spaced from the coil region. A yoke stud is located in the aperture and connects the upper yoke layer to the main pole. The plate with the aperture replaces the multi-turn coil of the prior art and thus allows for a short yoke height. Write current is directed to the plate coil region and induces a magnetic field in the aperture, which generates magnetic flux in the yoke stud and the connected main pole. The heat-sink regions dissipate heat generated in the plate by the write current. A lower electrical lead layer is located below the plate and also has an aperture coincident with the aperture in the plate and a coil region around the aperture to assist in generating the magnetic field in the aperture.

主权项

1. A perpendicular magnetic recording write head for magnetizing regions of a magnetic recording layer comprising:
a substrate; a magnetic yoke comprising a lower layer on the substrate, an upper layer, a first yoke stud connected to the upper layer, and a main pole connected to the first stud and having a tip for facing the recording layer; an electrically conductive plate between the yoke upper and lower layers and having a first aperture, wherein said first stud is located within said first aperture, the plate having a first coil region near said first aperture and heat-sink regions spaced from said first coil region; and first and second electrically conductive leads connected to the plate for conduction of electrical current to said first coil region around said first aperture to generate magnetic flux in said first stud and connected main pole.