Patent ID: 6309204
Filing Date: 2001-10-30
Classification: B23K,B29C,B29L,G11B,Y10S

Abstract:
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; anda 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; anda second positioning member that is inserted into the center aperture of the disc substrate and repositions the disc substrate to said pre-set position.