Thin film magnetic head having an improved magnetic core

A thin film magnetic head comprising lower and upper cores, a pair of rear intermediate cores interposed between rear portions of the lower and upper cores, a pair of front intermediate cores interposed between front portions of the lower and upper cores and a magnetic gap provided between the pair of the front intermediate cores, the thin film magnetic head comprising:

• the rear portions of the lower and upper cores having wider cross-sectional areas than those of the front portions of the lower and upper cores connected to the rear portions thereof forming inflection points;
• the pair of the front intermediate cores having extended portions respectively, the extended portions being provided on the lower and upper cores so as to be long enough to prevent magnetic saturation in the magnetic circuit at the inflection points of the upper and lower cores by causing distal ends of the pair of front intermediate cores to be extended beyond the inflection points thereof;
• and
• a spacer of a non-magnetic material interposed between the extended portions, the spacer having a larger thickness than that of the magnetic gap so as to prevent magnetic leakage between the extended portions of the pair of the front intermediate cores.