Patent ID: 6195232
Filing Date: 2001-02-27
Classification: G11B

Abstract:
A thin film head (TFH) magnetic transducing device comprising:a substrate;a bottom magnetic pole disposed over said substrate, said bottom magnetic pole comprising a bottom pole-tip portion and a bottom back portion, said bottom back portion comprising a bottom elongated region, said bottom elongated region having a bottom back-end;a non-magnetic gap layer deposited over at least said bottom pole-tip portion of said bottom magnetic pole;a top magnetic pole disposed over said gap layer and over said bottom magnetic pole, said top magnetic pole substantially overlying said bottom magnetic pole, said top magnetic pole comprising a top pole-tip portion and a top back portion, said top back portion comprising a top elongated region and a transitioning top front portion extending between said top elongated region and said top pole-tip portion, said top pole-tip portion having a width smaller than a width of said top elongated region, said top elongated region having a top back-end, said bottom back portion and said top back portion being magnetically connected to each other at a back-closure contact area, said back-closure contact area being located within a back-closure region, said back-closure contact area extending along substantially an entire width of at least one of said top and bottom back-ends, said width of said top elongated region being not larger than a width of said bottom elongated region, said pole-tip portions terminating at an air bearing surface, said width of said top pole-tip portion and each of said top and bottom elongated regions being measured in a direction perpendicular to a magnetic flux direction therein during write operations, said width in each instance being parallel to said air bearing surface; andone or more of (a) a bottom solenoidal coil, comprising at least one turn, wrapped around said bottom magnetic pole and (b) a top solenoidal coil, comprising at least one turn, wrapped around said top magnetic pole.