Crystallized glass-bonded amorphous metal magnetic film-non-magnetic substrate magnetic head

Claim 1

A magnetic head, comprising: at least four layers disposed in a layer-to-layer connected sandwich arrangement, each layer having two opposite faces and an outer peripheral edge, a length and width extending generally parallel to said faces thereof and a thickness extending generally perpendicular to said faces thereof; said layers including, in series, a first non-magnetic substrate layer, an amorphous metallic magnetic film layer, a crystallized glass layer, and a second non-magnetic substrate layer; said crystallized glass layer bonding said amorphous metallic magnetic film layer to said second non-magnetic substrate layer; corresponding portions of each said outer peripheral edge of said four layers collectively providing a tape running surface; said amorphous metallic magnetic film layer being divided into two laterally adjacent portions providing a gap extending completely through the thickness of said amorphous metallic magnetic film layer, said gap intersecting said outer peripheral edge of said amorphous metallic film layer whereby said tape running surface includes said gap; said amorphous metallic magnetic film layer having a crystallizing temperature; said crystallized glass layer being made of a glass which has an amorphous state from which it is crystallizable; said glass having, when in said amorphous state, a softening temperature which is lower than said crystallizing temperature of said amorphous metallic magnetic film layer, and said glass having, when in a crystallized state, a melting point which is higher than said softening temperature; said crystallized glass layer having a thickness of 0.1 to 10 μm.