Information recording medium and process for producing the same

Details Information recording medium and process for producing the same Information recording medium and process for producing the same

1988-03-28

1990-04-24

Robinson, Ellis P.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428913, 369283, 346 76L, 3461351, 156 60, 156242, 15624422, 15624427, 264104, 264106, B32B 302

Patent

active

049199889

ABSTRACT:
An information recording medium has such a structure that a disc-shaped substrate is provided with a hole at its central part, an inner-side non-recording zone is provided around the periphery of said hole, an outer-side non-recording zone is provided inside the outer periphery of the substrate, a recording zone is provided between both non-recording zones on the substrate, and a flexible disc-shaped resin film having a hole at its central part is joined to each of the non-recording zones on the substrate in such a state that the resin film is substantially not in contact with the recording zone on the substrate to form a gas layer over the recording zone. A process for producing the recording the medium is also disclosed.

REFERENCES:
patent: 4672600 (1987-06-01), Bolston et al.

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