Method for manufacturing high recording density optical disk

Details Method for manufacturing high recording density optical disk Method for manufacturing high recording density optical disk

1990-09-17

1993-08-24

McCamish, Marion E.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making named article

430323, 430495, 430945, 1566591, 369285, G03F 700

Patent

active

052387860

ABSTRACT:
A mastering method for making a high recording density optical disk is disclosed, in which a substrate with a photosensitive material layer is selectively exposed to a focused laser light having a predetermined power representing information to be recorded. The laser power is such that the exposed width at the top surface of the photosensitive material layer is larger than the exposed width at the bottom surface of the photosensitive material layer. After the development of the layer, the remaining photosensitive material layer is used as an etching mask for the substrate to form pits in the substrate.

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Applied Optics, vol. 21, No. 11, Jun. 1, 1982 L. F. Johnson, "Optical Writing of Dense 1000-.ANG. Features in Photoresist", pp. 1892 and 1893.
Patent Abstracts of Japan, vol. 10, No. 22, p. 424, Jan. 28, 1986; Mikio Takeshima, "Manufacture of Stamper for Optical Disk".

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