Source carrier for magnetic duplication

Abstract

A source carrier for magnetic duplication, which prevents signal omission of magnetic information copied on a target medium during magnetic duplication by using the source carrier for magnetic duplication. In the concave-convex pattern formed on the source carrier, by making the width W1 of the convex portion 11 in the track pitch direction (arrow Y direction) smaller than the track pitch P, no concave portion surrounded by the convex portion is formed.

Description

technical field [0001] The present invention relates to a source carrier for magnetic replication having a concave-convex pattern for replicating information onto a target medium and a method for using the same. Background technique [0002] In magnetic storage media, as the amount of information increases, it is generally desirable to have a large-capacity, inexpensive medium that can store a large amount of information, and a so-called high-speed storage medium that can be read out in a short time. As an example, it is well known that there is a high-density magnetic disk medium used in a hard disk drive and a floppy disk drive. In order to realize a large capacity, a magnetic head is used to accurately scan a narrow track and read a signal with a high signal-to-noise ratio (S / N ratio). Magnetic track servo technology plays an important role. In one circle of the magnetic disk, the tracking servo signal, address information signal, read clock signal, etc. are recorded at ...

AI Technical Summary

Problems solved by technology

If there is such a concave portion 72 surrounded by the convex portion 71 on all sides, even if the technique of improving the adhesiveness such as the above-mentioned Japanese Patent Application Laid-Open No. 11-161956 is adopted, in fact, when the source carrier and the target medium are brought into close contact, the surrounding area of ​​the concave portion 72 will be reduced. The convex portion 71 is first in close contact with the target medium, and the concave portion 72 is sealed, so that the air in the concave portion 72 cannot be drawn out, and as a result of remaining air, there is a problem that sufficient close contact cannot be achieved.

[0011] In addition, if the magnetic duplication is carried out in the state where the source carrier and the target medium are in close contact as described above, before the magnetic duplication, there will be a situation where positioning is performed in a state where the source carrier and the target medium are in close contact. During positioning, the source carrier and the target medium Friction occurs between them. In the process of repeated magnetic replication, the shape of the pattern surface of the signal of the recording source carrier is worn, which will reduce the replication accuracy.

Due to wear and tear, the copying accuracy is reduced, and the source carrier needs to be replaced, but the source carrier is very expensive. How many target media can be copied by one source carrier becomes a very important issue in reducing manufacturing costs.

[0012] In addition, when the source carrier and the target medium are in close contact, even if a part of the two has poor contact, the consistency of the positional relationship between the two will not be maintained on the entire surface, which will reduce the quality of the copy.

And sometimes there will be an area where magnetic copying is not performed in a poorly bonded area, and the magnetic signal copied in the target medium will be missed, and the recording quality of the signal will be reduced. If the recorded signal is a servo signal, tracking cannot be fully implemented. create problems that reduce reliability

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