Patent ID: 8867172
Filing Date: 2014-10-21
Classification: G11B

Abstract:
1. A DFH slider comprising: an ABS having a length and a width and an incised topography, including transversely separated leading and trailing portions, wherein said trailing portion includes a read/write head and adjacent heater for DFH operations embedded at a trailing edge end of a central pad formed symmetrically about a central axis; and wherein said central pad includes a finger extending longitudinally in a leading edge direction from a point to the leading edge side of said read/write head and heater; and wherein said finger is incised by a narrow down-track channel having a first width and a first depth and formed symmetrically about said central axis and extending longitudinally from an opening in said leading edge of said finger in a direction towards said read/write head and adjacent heater but terminating before reaching said read/write head and heater; and wherein a leading edge end of said narrow down-track channel is open and said trailing edge end of said channel is simply closed or is closed in a geometrical form as a triangle, a circle, a rectangle or a trapezoid; and a wide down-track channel formed symmetrically about said central axis, said wide down-track channel having a trailing edge portion with a trailing edge opening, and a leading edge portion with a leading edge opening and a bridged intersection between a down-track and cross-track channel, said bridged intersection having a variable width and a variable depth but being symmetric about a central down-track axis and continuously connecting said trailing edge and leading edge portions, wherein said trailing edge opening abuts said leading edge end of said central pad whereat said trailing edge opening of said wide down-track channel connects with said leading edge opening in said narrow down-track channel incised in said finger; and wherein said leading edge portion of said down-track channel abuts a transverse cross-track channel symmetrically formed in said leading edge portion and wherein said abutment forms a T shape.