G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.4, 352/10
G11B 7/26 (2006.01) C03C 17/36 (2006.01)
Patent
CA 1191597
ABSTRACT OF THE DISCLOSURE A method for forming a stamper for use in molding video disc replicas in which a disc-shaped master recording is formed which includes a glass substrate and a thin photore- sist recording layer. An information signal is recorded in the recording layer in a sequence of spaced pits arranged in a plurality of substantially circular and concentric recording tracks. A first thin, uniform, metallic film is deposited on the master recording. A second thin, uniform, metallic film is electroplated on the first film so that the first and second films together form an integral, metallic layer. The metallic layer is separated from the underlying master and the residual photoresist is removed from the undersurface of the separated metallic layer to form a stamper suitable for use in molding video disc replicas.
434537
Discovision Associates
Gowling Lafleur Henderson Llp
LandOfFree
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