| 摘要 |
PURPOSE:To form a uniform gap with high accuracy by butting core halves on each other whose ferrite butting faces are processed by a phosphoric acid and bonding them to prevent the reduction in the magnetic characteristic due to diffusion and permeation to glass. CONSTITUTION:Photo resist film 23a, 23b are formed to blocks 20a, 20b subject to a prescribed processing, the blocks are immersed in a 30-40% conc. phosphoric acid solution on a hot plate at 70 deg.C, the blocks 20a, 20b are butted to form a composite block 25 while holding it at nearly 100 deg.C under nitrogen atmosphere. The the block 5 is sliced to a prescribed shape to be finished into a magnetic head while applying polishment. Since no glass is used for bonding, the reduction in the magnetic characteristic due to diffusion and permeation of glass is prevented and a uniform gap width with high accuracy is formed. |
