SPACING LOSSES OF METAL IN GAP HEAD

The spacing losses of two kinds(Single/Double sided) of MIG(Metal In Gap) heads for VCR systems are investigated. The spacing losses depend on the metal film recess. The spacing loss of the single sided MIG head is smaller than that of the double sided MIG head, even though the metal film recess is the same in both types of heads. It is considered that in the single sided MIG head, only the one side of the gap is recessed because one side of the gap is a ferrite. Therefore, the spacing of the single sided MIG head is smaller than that of the double sided MIG head.