Writer with HMTS (high moment trailing shield) aligned with spin layer

PMR magnetic writer that is configured for microwave assisted magnetic recording (MAMR), comprising:

• a dielectric layer having a planar trailing-edge surface, an air-bearing surface (ABS) plane perpendicular to said planar trailing-edge surface and a trapezoidal trench formed symmetrically therein through said planar trailing-edge surface, projecting rearward in a direction perpendicular to said ABS plane and opening at said ABS plane;
• wherein said trench is wider at said planar trailing-edge surface and tapers downward to form a narrower leading edge;
• and
• a main magnetic pole (MP) emerging through said trench, said MP having a planar trailing-edge surface and a trapezoidal planar ABS face symmetrically positioned within said trench at said air-bearing surface (ABS) plane, wherein said MP face is separated from walls of said trench by symmetrically placed side gaps (SGs) and a leading-edge gap (LG);
• and
• a uniformly thick spin torque oscillator (STO) layer formed contiguous with said planar trailing-edge surface of said MP, wherein said STO layer extends up to openings of said trench bounded by said MP and said SGs and covers said trailing-edge surface of said MP;
• a uniformly thick, high moment trailing shield (HMTS) layer formed contiguously over said STO layer;
• wherein
• said STO layer and said HMTS layer are aligned with each other and have equal widths that are equal to the trailing-edge width of said MP;
• wherein
• a write gap (WG) layer extends symmetrically from each side of said HMTS and STO layers, said WG layer thereby covering at least a portion of said planar trailing-edge surface of said dielectric layer and completely covering said SGs where they emerge at said dielectric layer at each side of said trench opening.