Planar yoke write head for half-micron track width

Required basic features as to 30 Gbpsi recording density for write head are good overwrite O/W, good nonlinear transition shift NLTS, and high frequency performance in half-micron track width. To achieve these, we have developed a new structure, planar yoke write head, combined with SV read head, which features narrow track (physical write track width=0.35 μm), narrow coil pitch (1.3 μm coil pitch) for short yoke length (16 μm yoke length), one-layer coil design, and used flat yoke pole while succeeding in the advantages of our current stitched pole write head. Regarding the write performance, we compared planar yoke head with current stitched pole head by simulation and actual measurement