JPS6433707A - Manufacture for composite type magnetic head - Google Patents

Abstract

PURPOSE:To relax a stress and to erase the crack initiation of a glass part by executing only the joining of a rear gap part with a low melting-point glass without joining near to depth end of a front gap when a read write core and an erase core are made in one body through a spacer composed of a non- magnetic substance bonding member. CONSTITUTION:With a high saturation magnetic flux density, an erase core 12 and an R/W core 13 are generated by the Mn-Zn single crystal of a hyperbolic resistance, and after cutting and working the one side of the joined surface, they are abutted on each other and bonded. At such a time, a ceramic 11 of a prescribed shape and dimension is inserted to a center part near a front gap part F of a gap depth (d) and the upper and lower arrangement of the cores 12 and 13 is inverted. Then, a low-melting point glass 14 is flown from the rear gap part side and the cores 12 and 13 and the ceramic 11 are made in one body. At such a time, a channel M is carved to stop the flow of the glass so that the glass can not flow into an internal between the cores 12 and 13 and the ceramic 11. Then, a bubble is not generated on a bonding surface.