Patent ID: 6757131
Filing Date: 2004-06-29
Classification: G11B

Abstract:
A magnetic disk apparatus for reading and writing information to a magnetic disk, comprising:a base upon which is mounted a motor to rotate the magnetic disk mounted thereon; an arm having at least one head configured and arranged to turn so as to traverse the surface of the magnetic disk to access the magnetic disk; and a cover for enclosing the motor, the magnetic disk, and the arm on the base, wherein an inner surface of the cover is opposite to the magnetic disk surface, and the cover has a first recessed portion in a first region that generally corresponds to a portion of the magnetic disk surface other than the area traversed by the arm and a second recessed portion in a second region corresponding to a portion of the magnetic disk surface that is traversed by the arm, and a first space between the inner surface of the first region and the magnetic disk surface is narrower than a second space between the inner surface of the second region and the magnetic disk surface by making the depth of the first recessed portion greater than the depth of the second recessed portion, and further wherein the first space is approximately 0.5 mm.