| 摘要 |
PURPOSE:To prevent damage of a recording medium, by providing a cover member directly or adjacently on the surface of a thin film waveguide, and chamfering the edge opposed to the recording medium. CONSTITUTION:In a thin film waveguide type head which is provided with a semiocnductor laser 3, a tooth electrode 7 for energizing an ultrasonic surface acoustic wave 8 and thin film lenses 5, 9, on a waveguide 2 on a base plate 1, it is covered with a cover member 19 through a spacer 20 so that dust, etc. do not stick onto its surface. On the other hand, the edge of the base plate 1 and the cover member 19, which are opposed to a recording medium 18 is chamfered or made round lest the sharp edge of the head should damage the recording medium 18. In this regard, it is desirable that the cover member 19 is formed by a material whose friction strength is almost equal to that of the base plate 1. |
