Writer shields with modified shapes for reduced flux shunting

A PMR head comprising:

• a main pole having a tapered portion on a trailing edge side in a direction away from an ABS and an untapered portion having a uniform width thereafter;
• a trailing edge shield having an ABS, a back surface parallel to said ABS and a leading edge surface joining said ABS and said back surface, wherein a separation between said leading edge surface and said tapered portion of said main pole forms a writer gap;
• wherein
• said leading edge surface joins said back surface at a tapered corner formed by two successive obtuse angles α having vertices separated vertically by a distance h;
• whereby a single 90° corner between said leading edge surface and said back surface is, thereby, eliminated and wherein a separation between said main pole and said tapered corner increases with a distance perpendicularly away from said ABS.

A PMR head comprising:

• a main pole having a tapered portion on a trailing edge side in a direction away from an ABS and having a uniform width thereafter;
• a trailing edge shield having an ABS, a back surface parallel to said ABS and a leading edge surface joining said ABS and said back surface, wherein a separation between said leading edge surface and said tapered portion of said main pole forms a write gap;
• wherein
• said leading edge surface joins said back surface at a rounded corner;
• whereby a single 90° corner between said leading edge surface and said back surface is eliminated and wherein the separation between said leading edge surface of said trailing edge shield increases at said rounded corner with a distance perpendicularly away from said ABS.

A PMR head comprising:

• a main pole tapered on a trailing edge side for a distance tWGd in a direction away from an ABS and having a uniform width thereafter;
• a leading edge shield having an ABS, a back surface parallel to said ABS and a trailing edge surface joining said ABS and said back surface, wherein a separation between said trailing edge surface and said main pole forms a leading edge gap;
• wherein
• said trailing edge surface joins said back surface at a tapered corner formed by two successive obtuse angles α′ having vertices separated by a vertical distance h′;
• whereby a single 90° corner between said leading edge surface and said back surface of said leading edge shield is eliminated and wherein a separation between said main pole and said tapered corner of said trailing edge surface of said leading edge shield increases with a distance perpendicularly away from said ABS.

A PMR head comprising:

• a main pole tapered for a distance tWGd on a trailing edge side in a direction away from an ABS and having a uniform width thereafter;
• a leading edge shield having an ABS, a back surface parallel to said ABS and a trailing edge surface joining said ABS and said back surface, wherein a separation between said trailing edge surface and said main pole forms a leading edge gap;
• wherein
• said trailing edge surface joins said back surface at a rounded corner;
• whereby a single 90° corner between said leading edge surface and said back surface of said leading edge shield is eliminated and wherein a separation between said main pole and said rounded corner of said trailing edge surface of said leading edge shield increases with a distance perpendicularly away from said ABS.