Method of manufacturing a magnetic head

A method of manufacturing a magnetic head of the type comprising two core parts which form a tape contact face, each core part having a gap bounding surface, said gap bounding surfaces being spaced to form a transducing gap therebetween, said method comprising the following steps:

• etching a channel in the gap bounding surface of one of said core parts, said channel having a floor bounded on one side by a wall,
• etching a polishing mark in said one of said core parts, said polishing mark being spaced a predetermined distance from a line colinear with said one wall of said channel,
• forming a winding aperture in said channel, said winding aperture having an edge spaced from said one wall,
• bonding said core parts together to form a magnetic head having a transducing gap of desired length, and
• grinding the tape contact face opposite said gap from said channel using said polishing mark to control the distance between said tape contact face and said one wall defining the gap height.