| 摘要 |
In a disk device, an arm for supporting a head includes upper and lower plates that are located parallel to a surface of a magnetic disk. The lower plate has a linear expansion coefficient greater than that of the upper plate. The upper and lower plates are provided with an electrically-heated wire. When a present altitude of the disk device exceeds a threshold altitude, an electric current is supplied to the heated wire so that the upper and lower plates are expanded. Due to a difference in the linear expansion coefficients between the upper and lower plates, the arm is warped in a direction away from the magnetic disk so that a distance between the head and the surface of the magnetic disk is increased.
|
