Process for manufacturing a composite magnetic head structure

Abstract

A composite magnetic head tip has a pair of head cores (2,3) facing each other and each having a center core (5,7) and a side core (4,6) which are separated by a magnetic gap (8,9) and are glass welded together at an apex portion (32). Each head core has a set of notches (14,14') which define a track width in the magnetic gap. Each notch is formed so that it begins at a confronting surface (29) where the center cores face each other, crosses through the magnetic gap, and ends on a sliding surface (28) for slidably contacting a magnetic medium. The notches end at a point which is directly above the welded position (19) provided at the apex portion of each head core. A process for manufacturing the composite magnetic head tip includes the steps of first forming a head core and then forming a set of notches therein, then forming another head core and forming another set of notches therein, aligning track widths and then glass molding each of the head cores together while at the same time filling the track notches with the same glass molding. An alternative process involves forming the notches in the head core blocks such that the lower surface (31) of the notches passes below the apex portion of the head core blocks, and applying glass molding to the notches and between the two head cores using a glass material that has a melting point substantially as low as the melting point of the glass material used for glass welding the side and center cores.