| 摘要 |
PURPOSE:To prevent the fact that a crack is generated on a magnetic thin film by external force, by using a supporting body of a 3-layered structure having an intermediate layer whose Young's modulus is small. CONSTITUTION:A magnetic metallic thin film 4 is formed on a nonmagnetic base body formed by providing the second layer 1 made of polyester, etc. of 1-10mum thick, having a Young's modulus which is <= about of a Young's modulus of other 2 layers, between the first layer 2 made of polyester, etc. of about 1-10mum thick, whose Young's modulus is >= about 400kg/mm.<2>, and the third layer 3 made of polyester, etc. of about 2-50mum thick, whose Young's modulus is >= about 400kg/mm.<2>. |
