| 摘要 |
PURPOSE:To smooth the magnetic layer, by selecting the binder and using the method to control the pitch of coarseness on the surface of two types of magnetic layers with the filler such as filler, abrasive, conductive powder or the like. CONSTITUTION:The maximum value is set to about >=80Angstrom (120-1,000Angstrom preferably) for the mean coarseness (Ra) of the center line of the unevenness in the region where the pitch of surface coarseness of the magnetic layer is larger than about 300mum. On the other hand, the maxumum value is set to about <=40Angstrom (<=20Angstrom preferably) for the coarseness (Ra) of the unevenness in the region of about 5-100mum pitch mentioned above. As a result, a suppression can be secured for the shaving of the magnetic layer, the thinning of the tape winding surface, the jamming and the wear of the head each. |
