VERFAHREN ZUR BILDUNG EINES GLAESERNEN ABSTANDSTUECKS IN DER MAGNETSPALTE EINES MAGNETKOPFES.

摘要

In a method of making a magnetic gap by depositing a glass layer on a surface of magnetic head core materials by cathodic sputtering of a glass target and cementing a pair of the resulting glass-coated magnetic head core materials, the improvements constituted by monitoring the thickness of the sputtered glass layer by an interference of a light beam guided onto a surface of the magnetic head core materials during the deposition and using a sputtering apparatus having a sample holder beside the target for securing the magnetic core materials and a mask plate for achieving uniform thickness of the sputtered glass layer. The method makes possible production of magnetic heads having excellent electromagnetic conversion characteristics with high accuracy.