Method of forming a glass spacer in the magnetic gap of a magnetic head.

摘要

in a method of making a magnetic gap by depositing a glass layer on a surface of a magnetic head element by cathodic sputtering of a glass target and cementing the resulting glass-coated magnetic head element to a similar element or an uncoated magnetic head element, the thickness of the sputtered glass layer is monitored by an interference of a light beam (31) guided on a surface of the magnetic head element (32) during deposition, using a sputtering apparatus having a sample holder (33) beside the sputtering target for securing the magnetic head element (32) and a mask plate (37) for achieving uniform thickness of sputtered glass layer(s). The magnetic head produced has excellent electromagnetic conversion characteristics and high accuracy.