Single track magnetic head assembly

Claim 1

A magnetic head assembly comprising: a nonmagnetic substrate having a slot extending upwardly from one edge; a thin film layer of magnetic material deposited on a flat surface of said substrate generally normal to said edge, said thin film layer having a slot contiguous with the first-mentioned slot and of greater height as measured from said edge, terminating in a transducing gap which is of substantially narrower width than said slots and extends to a transducing face defining the upper end of the assembly and has a height corresponding to a preselected desired throat height; a nonmagnetic closure joined to said thin film layer and extending downward from said transducing face part way toward said edge, said closure having a slot substantially aligned with and substantially the same width as the upper portion of said first-mentioned slot; a magnetic bridge structure joined to said thin film layer and extending from the bottom of said closure to said edge, said bridge structure having a U-shaped recess aligned with said slots and extending laterally inward part way toward said thin film layer; said thin film layer separating said substrate from said closure and bridge structure and making planar contact with said bridge structure and being bisected by the slot and gap therein to form two substantially symmetrical pole pieces; and electric coil means disposed within said recess and wound about said bridge structure.