Patent ID: 8964332
Filing Date: 2015-02-24
Classification: G11B

Abstract:
1. A microwave-assisted magnetic recording (MAMR) head comprising: a magnetic writer main pole extending to an air bearing surface; a shield wrapping around at least a portion of said main pole, said shield comprising a trailing shield at a trailing side of said main pole and a side shield at each respective side of said main pole in a cross-track direction; a gap between said main pole and said shield, said gap comprising a trailing gap between said trailing shield and said main pole and a side gap between each respective side shield and said main pole; a spin torque oscillator (STO) element positioned between said main pole and said trailing shield and offset in a particular offset direction from a centerline of said main pole; and wherein the side gap positioned on the side opposing said offset direction is narrower than the side gap positioned on the side of said offset direction.