Stock material or miscellaneous articles – Circular sheet or circular blank
Patent
1999-06-14
2000-12-12
Evans, Elizabeth
Stock material or miscellaneous articles
Circular sheet or circular blank
428 644, 428 645, 428 646, 428457, 428913, 43027013, 4304951, 430945, 369283, 369288, B32B 302
Patent
active
06159573&
ABSTRACT:
A description is given of a rewritable optical information medium having an IPIAIM stack comprising a phase-change recording layer sandwiched between two dielectric layers, a light-absorbing layer of a material like Si, Ge, Mo, or W, a third dielectric layer, and a metal mirror layer. The light-absorbing layer reduces the difference in light absorption between the amorphous state and the crystalline state to a minimum, thus reducing the recording mark distortion. The presence of the light-absorbing layer in this position ensures that the optical phase difference between the amorphous and the crystalline state is almost zero, making the medium suitable for land-groove recording.
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patent: 5935672 (2000-07-01), Zhou
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patent: 6040066 (2000-03-01), Zhou
patent: 6087067 (2000-07-01), Kato
Evans Elizabeth
Spain Norman N.
U.S. Philips Corporation
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