Triple substrate optical disk and manufacturing method thereof

Details Triple substrate optical disk and manufacturing method thereof Triple substrate optical disk and manufacturing method thereof

1998-10-22

2000-05-16

Evans, Elizabeth

Stock material or miscellaneous articles

Circular sheet or circular blank

428 644, 428 647, 428 652, 428412, 428689, 428913, 43027012, 4304951, 430945, 3692751, 369283, 369288, B32B 300

Patent

active

060634693

ABSTRACT:
A triple substrate optical disk comprises a center substrate layer, a top substrate layer, a bottom substrate layer, a top adhesion layer bonding the top substrate layer to the center substrate layer and a bottom adhesion layer bonding the center substrate layer to the bottom substrate layer. The center substrate layer has a center substrate containing a top surface and a bottom surface thereof, a first recording layer deposited on the top surface of the center substrate and a second recording layer deposited on the bottom surface of the center substrate. The top substrate layer includes a top substrate and a third recording layer, wherein the top substrate has a top surface and a bottom surface thereof and the third recording layer is deposited on the bottom surface of the top substrate. The bottom substrate layer includes a bottom substrate and a fourth recording layer, wherein the bottom substrate has a top surface and a bottom surface thereof and the fourth recording layer is deposited on the top surface of the bottom substrate. Each of the top and bottom surfaces of the center substrate, the bottom surface of the top substrate and the top surface of the bottom substrate has tracks thereon arranged either spirally or concentrically, each of the tracks containing recesses and protrusions.

REFERENCES:
patent: 5761188 (1998-06-01), Rosen
patent: 5764621 (1998-06-01), Choi
patent: 5817389 (1998-10-01), Ono
patent: 5862121 (1999-01-01), Suzuki

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