Patent ID: 6721138
Filing Date: 2004-04-13
Classification: B82Y,G11B

Abstract:
An electromagnetic transducer comprising:a solid body having a leading end, a trailing end, and a media-facing surface; first and second soft magnetic pole layers magnetically coupled to each other, said second pole layer disposed closer than said first pole layer to said trailing end; an electrically conductive coil disposed in said body and including a plurality of adjacent coil sections oriented substantially parallel to each other, said coil sections disposed between and electrically isolated from said first and second pole layers; a first soft magnetic pedestal disposed adjacent to said first pole layer and said media-facing surface, said first pedestal extending much less than said first pole layer from said media-facing surface, said first pedestal having a base that is tapered to meet said first pole layer at a location that is further from said media-facing surface than a remainder of said first pedestal; and a second soft magnetic pedestal disposed adjacent to said second pole layer and said media-facing surface, said second pedestal extending less than said second pole layer from said media-facing surface, said second pedestal separated from said first pedestal by a submicron nonmagnetic gap, said second pedestal extending further than said first pedestal from said media-facing surface in a region adjacent to said gap.