METHOD OF MANUFACTURING AN OPTICAL STORAGE DISK

摘要

PCT No. PCT/EP88/00479 Sec. 371 Date Nov. 22, 1989 Sec. 102(e) Date Nov. 22, 1989 PCT Filed May 27, 1989 PCT Pub. No. WO88/09990 PCT Pub. Date Dec. 15, 1988.An optical storage disk includes a glass substrate (1) into which guide tracks (3) for servo-controlling the focussed light beams are directly stamped in by hot stamp process. After stamping, the glass substrate is thermally quenched in the stamping device to increase its breaking resistance through thermal curing. In order to achieve uniform guide tracks over the entire surface of an optical storage disk, flexible stamp stencils (35) in a flexible holder (34) are used whose curvature can be changed by applying hydro-static pressure. Suitable stamp stencils include monocristalline silicon disks with surface hardening, or of metal disks, structured photolithographic processes. The stamp lands are made with bevelled edges to facilitate the separating of stamp and glass substrate after cooling.