Apparatus for manufacturing disc substrate
AssigneeSony Corporation
InventorHiroki Atobe
Life of this patent
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Abstract
A disc of synthetic resin used for signal recording/reproduction by a head having floating slider, in which the disc substrate is deburred to removed defects in appearance and is improved in strength and quality, and the manufacturing apparatus for the disc substrate. The manufacturing apparatus includes a worktable for supporting the disc substrate in rotation, a positioning unit for positioning the disc substrate at a pre-set position on the worktable and a laser light source for illuminating the laser light on the disc substrate supported for rotation by the worktable. On the outer rim of the disc substrate is formed a raised portion not larger than 15 μm in height. The raised portion has a thickness larger than that of the outermost portion of the disc substrate.
Claims13
An apparatus for manufacturing a disc substrate comprising:
- a rotating worktable that is structurally adapted to support and rotate an optical disc substrate of synthetic resin;
- a laser light source that is positioned to illuminate the laser light on at least an outer rim portion or an inner rim portion of the disc substrate that is supported and rotated by said worktable;
- and
- a positioning unit, for positioning the disc substrate at a pre-set position on the worktable, which comprises:
- a first positioning member that is inserted in a center opening formed in the disc substrate, and is of a width that causes the disc substrate to be positioned about an allowable range that encompasses said pre-set position;
- and
- a second positioning member that is inserted into the center aperture of the disc substrate and repositions the disc substrate to said pre-set position.
Dependencies are inferred from the claim text.