Methods and devices to control write pole height in recording heads

摘要

Recording heads for data storage systems are provided. Recording heads illustratively include a write pole, a bumper, a dielectric layer, and a surface. In some embodiments, a portion of the surface includes portions of the write pole, bumper, and dielectric layer. The write pole, bumper, and dielectric layer are illustratively made from materials that have polishing rates. In some embodiments, the polishing rate for the write pole material is more similar to the polishing rate for the bumper material than it is to the polishing rate for the dielectric layer material.

主权项

1. A recording head comprising:
a write pole; a return pole; a bumper; a dielectric layer that is between the write pole and the bumper, and that is between the write pole and the return pole; and a surface that includes a portion of the write pole, a portion of the bumper, a portion of the return pole, and a portion of the dielectric layer, such that the write pole and the bumper are completely surrounded by the dielectric layer at the surface, wherein the write pole, the bumper, and the dielectric layer are each made from a material that has a polishing rate, and the polishing rate for the write pole material being more similar to the polishing rate for the bumper material than it is to the polishing rate for the dielectric layer material.