Patent ID: 6772507
Filing Date: 2004-08-10
Classification: G11B,Y10S,Y10T

Abstract:
A method of manufacturing a magnetic recording medium having a disc-shaped flexible slave medium accommodated in a case, onto which servo signals are recorded by a magnetic transfer method, comprisingcutting an original sheet into discrete webs each having a predetermined width punching at least one of the webs to obtain a disc-shaped slave medium removing distortion of one of the web and the slave medium smoothing a surface of the slave medium fixedly attaching a center core to the slave medium performing a magnetic transfer in a state where a master medium bearing servo information and one of the web and the slave medium are allowed to be brought into close contact with each other incorporating the slave medium into the case removing dust on the slave medium incorporated into the case checking the servo signals magnetically transferred to the slave medium and packing the magnetic recording medium as a product wherein said cutting, said punching, and distortion removal, said smoothing, said core attachment, said magnetic transfer, said incorporation, said dust removal, said servo checking and said packing said thermo step, said burnishing step, said center core attachment step, said magnetic transfer step, said assembly step, said cleaning step, said verifying step and said packing step are performed in order.