Perpendicular magnetic recording head with photoresist dam between write coil and air bearing surface

A magnetic write head for perpendicular magnetic data recording, the write head having an air bearing surface (ABS), the magnetic head comprising:

• a magnetic return pole;
• a magnetic write pole that is magnetically connected with the return pole in a region away from the ABS;
• a write coil having a plurality of turns, a portion of which pass between the write pole and the return pole, the write coil being electrically insulated from the write pole and return pole;
• a coil insulation layer comprising hard baked photoresist disposed between and insulating the turns of the coil from one another;
• and
• a photoresist dam disposed between the write coil and the ABS;
• wherein the photoresist dam and the write coil are constructed of the same electrically conductive material.

A magnetic write head for perpendicular magnetic data recording, the write head having an air bearing surface (ABS), the magnetic head comprising:

• a magnetic return pole;
• a magnetic write pole that is magnetically connected with the return pole in a region away from the ABS;
• an electrically conductive write coil having a plurality of turns, a portion of which pass between the write pole and the return pole;
• a coil insulation layer comprising hard baked photoresist, a portion of which is disposed between the turns of the write coil;
• and
• an alumina fill layer disposed between the write coil and the ABS;
• wherein the write coil has an outermost turn that passes closer to the ABS than the other coil turns, and wherein the outermost coil turn is wider than the other coil turns in a region where the coil turns pass between the return pole and the write pole;
• and
• wherein the outermost coil turn, in the region that passes between the return pole and the write pole, comprises a coil turn portion and a photoresist dam portion, both of which are constructed of copper (Cu).