Magnetic pattern forming method, magnetic pattern forming...

Details Magnetic pattern forming method, magnetic pattern forming... Magnetic pattern forming method, magnetic pattern forming...

2005-09-27

2005-09-27

Tran, Thang V. (Department: 2653)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Thermomagnetic recording or transducers

C369S013020

Reexamination Certificate

active

06950261

ABSTRACT:
A magnetic pattern forming apparatus, which is designed to form a desired magnetic pattern on a magnetic disk having a magnetic layer on a substrate, is made up of a mask having a pattern identical or similar to the desired magnetic pattern, a projection optical system for exposing the magnetic disk to a spot-like energy beam coming through the mask to heat the magnetic layer for projecting the mask pattern to the magnetic disk at a one-to-one ratio or a predetermined reduction ratio, a magnetic field applying device for applying an external magnetic field to the magnetic disk, a control unit for conducting scanning with the spot-like energy beam with respect to the magnetic disk and the mask in their radial directions while rotating the magnetic disk and the mask.

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