Chemistry: electrical and wave energy – Processes and products – Coating – forming or etching by sputtering
Patent
1999-05-19
2000-09-12
Diamond, Alan
Chemistry: electrical and wave energy
Processes and products
Coating, forming or etching by sputtering
20419215, 20419226, 428 641, 428 642, 428 644, 428 647, 428 651, 428 652, 3692751, 369283, 369288, 369 94, 369112, 156230, 156234, 156241, 1563798, 156391, 156510, 156539, 156540, 427154, 427576, 118 44, 118 35, 118 45, 118 56, 118 57, 118209, C23C 1434, G11B 726, G11B 724, B32B 300, B32B 3100
Patent
active
061172847
ABSTRACT:
A dual-layer DVD disc that does not require a stamping step (typically, as part of the 2P prior art manufacturing process) during its manufacture. A polycarbonate substrate is molded and coated with a semireflective data layer in the usual way. A PMMA substrate is molded and coated with a fully reflective data layer. Adhesive is placed on the semireflective data layer, and the fully reflective data layer is transferred from its PMMA substrate to the polycarbonate substrate. The polycarbonate substrate thus ends up with two data layers in conformance with the DVD specifications, and the PMMA substrate can even be recycled for another use.
REFERENCES:
patent: 5540966 (1996-07-01), Hintz
patent: 5846627 (1998-12-01), Hong
patent: 5900098 (1999-05-01), Mueller et al.
patent: 5932051 (1999-08-01), Mueller et al.
Diamond Alan
WEA Manufacturing Inc.
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