Patent ID: 7346914
Filing Date: 2008-03-18
Classification: G11B

Abstract:
1. An optical disk drive comprising: a turntable for mounting and rotating an optical disk; a housing having a ceiling plate above the turntable; a plate member disposed between an upper surface of the turntable and the housing above the turntable and extending along a direction crossing disk tracks, the plate member creating spaces for guiding air flow generated between the upper disk surface and a lower surface of the ceiling plate of the housing during rotation of the optical disk, respectively in between the disk upper surface and a lower surface of the plate member and in between an upper surface of the plate member and the housing; and a repetitive structure formed on edge portions of the plate member and extending along the direction crossing the disk tracks, the repetitive structure creating space having a high resistance to air flow and space having a low resistance to air flow, and rectifying the air flow generated during disk rotation above the upper disk surface to suppress turbulence and enhance laminar flow.