| 摘要 |
PURPOSE:To reduce the counter areas of adjacent tracks and to reduce the crosstalk by forming plural tracks on the butted surface of nonmagnetic substrates with ferromagnetic films and applying a structure where both nonmagnetic substrates are butted to each other. CONSTITUTION:A ferromagnetic thin film 15 of ''Sendust'', etc. is formed by a thin film stacking process such as a sputtering or vapor deposition process on the butted surfaces 16 and 17 including the winding grooves of nonmagnetic substrates 12 and 13. Then the film 15 is partially removed by an etching process, etc. to obtain tracks 18a and 18b. No separation is carried out at the side of the surface 16 of obtained core blocks in terms of a magnetic circuit. While tracks 18a and 18b are separated from each other at the side of the surface 17. Therefore the counter areas between adjacent tracks 18a and 18b is reduced by an amount equal to the total value of thickness of films 15 and 15. |
