Patent ID: 6668894
Filing Date: 2003-12-30
Classification: G11B,Y10S,Y10T

Abstract:
A film layer separation device for multi-layer disks used in the manufacturing process of making a data disk with a plurality of data layers for holding a magnetic stamper with a data film to separate the stamper from the disk after transferring the data film to the disk, the separation device comprising:a stamper supporter, which includes a supporting plane for fixing and supporting a top surface of the stamper; an electromagnetic attraction device, which is connected to the stamped supporter for generating an electromagnetic force perpendicular to the supporting plane to hold the stamper; and a base fixture, which supports the stamper supporter and the electromagnetic attraction device and pushes/draws the stamper supporter and the electromagnetic attraction device close to/away from the disk; the electromagnetic attraction device comprising: at lease one conductive coil, which generates an electromagnetic force when an electrical current is imposed; at least one magnetic iron core, which is surrounded by the conductive coil to enhance the electromagnetic force generated by the conductive coil; a bottom plate, which supports the magnetic iron core; and a magnetic housing, which covers the conductive coil and is connected to the boundary of the bottom plate and whose top surface supports the stamper supporter.