Disk type information recording medium

Details Disk type information recording medium Disk type information recording medium

1987-09-11

1988-12-13

Thomas, Alexander S.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430945, 428 65, 3461351, 346137, 369284, 369286, 369288, G01D 1514

Patent

active

047910445

ABSTRACT:
A disk-shaped information recording medium is provided in such a manner that at least one information bearing layer formed on a side of a pair of disk-shaped substrates, which substrates are arranged so that the information bearing layers face each other with a hollow space between them by means of inner and outer spacers being concentrically interposed between the two substrates. A polyurethane adhesive layer is formed between the substrate and the spacer to combine said pair of substrates together via the inner and outer spacers.

REFERENCES:
patent: 4600625 (1986-07-01), Abe et al.

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