| 摘要 |
PURPOSE:To process a large quantity of magnetic films in a short time, by working and forming the track width of the magnetic films by irradiating a laser beam from the surface side. CONSTITUTION:A thin-film magnetic head is obtained by working a prescribed track width Tw by irradiating a beam from the surface side of a blank body of the thin-film magnetic head by utilizing a laser device L of Ar, YAG, etc., whose beams are converged. When a YAG laser is used, the track width working by means of the beam irradiation of the laser device L is performed under a condition where the input is 2-2.5kW, Q-switch frequency is 18-20kHz, converged beam diameter is 10-15mm., and the moving speed of a working table on which the blank body is placed is 20mm./min in the atmosphere of an inert gas, such as nitrogen gas, etc. When the track width working is performed by means of the laser beam irradiation, working of narrow-pitch tracks becomes possible and the manufacturing time is shortened. |
