Floating type magnetic head having flush rear reference surface

A floating type magnetic head comprising:

• a non-magnetic slider having an air bearing surface and a rear surface;
• a magnetic head core formed of a pair of magnetic core elements defining a magnetic gap or of a pair of magnetic core elements having a magnetic gap defined by a butting surface on which is formed a magnetic metallic thin film, said head core having a front gap surface, a back surface and a window section, and being fixed by bonding glass within a groove provided in a flow-out end of the air bearing surface of said slider, said groove extending through said rear surface;
• and
• an excitation coil wound in said window section,
• said front gap surface being placed so as to oppose a magnetic recording medium,
• said back surface and a portion of said rear surface adjacent said groove being flush,
• wherein the rear surface of said slider and the back surface of said head core are characterized by having been worked down by finish machining by an amount of 0.1 to 0.3 mm.

A floating type magnetic head comprising:

• a non-magnetic slider having an air bearing surface and a rear surface;
• a magnetic head core formed of a pair of magnetic core elements defining a magnetic gap or of a pair of magnetic core elements having a magnetic gap defined by a butting surface on which is formed a magnetic metallic thin film, said head core having a front gap surface, a back surface and a window section, and being fixed by bonding glass within a groove provided in a flow-out end of the air bearing surface of said slider, said groove extending through said rear surface;
• and
• an excitation coil wound in said window section,
• said front gap surface being placed so as to oppose a magnetic recording medium,
• said back surface and a portion of said rear surface adjacent said groove being flush,
• said head having a finish machined reference height in the range of from 0.61 to 0.66 mm and variations with respect to said height are within .+-.0.025 mm.