and d3 and the tilting angles u03b82 of the slanted surfaces 1b formed on the lower core layer 1 are 2 degrees for d1 and d2 and 5 degrees for d3 5 combination read write thin film magnetic heads e1 e2 and e3 in accordance with the first embodiment of the present invention shown in fig1 in which the heights h of the prominence 1a formed on the lower core layer 1 are 0 2 u03bcm for e1 0 4 u03bcm for e2 and e3 and and the tilting angles u03b82 of the slanted surfaces 1b formed on the lower core layer 1 are 2 degrees for e1 and e2 and 5 degrees for e3 all the combination read write thin film magnetic heads had the same thickness of the gap layer of 0 3 u03bcm signals were recorded with each of the combination read write thin film magnetic heads the on a recording magnetic medium and the width to of the signals was determined with a magnetic force microscope mfm the width tw of the front end of the upper core layer of each combination read write thin film magnetic head was determined with a scanning electron microscope the write fringing length of each head was calculated from the difference between the width to of the recorded signals and the width tw of the front fig8 is a graph illustrating write fringing lengths of the.