| 摘要 |
PURPOSE:To prevent the deterioration of magnetic characteristics generated at a high band due to the mechanical processings including the grinding, cutting, etc., by recovering said deterioration of magnetic characteristics by applying the polishing treatment to the mechanical processed surface at the opposite side to a magnetic film. CONSTITUTION:A metallic magnetic film 2 of ''Sendust'', etc. is coated on a nonmagnetic substrate 1 via a film 3 of SiO2, etc. formed between electrically insulated layers by a vapor deposition process, a sputtering process, etc. A sandwich structure 6 is cut with an azimuth to obtain core halves 7 and 7'. A winding window 8 is formed to the core half 7, and cut surfaces of halves 7 and 7' are polished to mirror surfaces by means of diapaste, etc. to obtain gap butting surfaces 7a and 7'a. Then two havles 7 and 7' are butted and adhered to each other to obtain a core material 10. Then the mirror surface polishing is applied to the surface 7a as well as cut surfaces 10a and 10b of the opposite side with diapaste, etc. The material 10 undergoes the mechanical processings including cutting, grinding, etc., the boat-shaped processing for a head rubbing face 10c, the polishing, etc. Thus a head chip 11 is obtained. |
