Optical disk

Details Optical disk Optical disk

1997-05-30

2000-03-14

Angebranndt, Martin

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, 428 652, 369288, 369286, G11B 724

Patent

active

060370998

ABSTRACT:
Opposed faces of two disk substrates are bonded by an adhesive layer whose characteristic parameters are set in predetermined ranges, particularly in the values of a product of Young's modulus and the film thickness in a range of 1.0.times.10.sup.-2 kg/mm to 3.0 kg/mm, a product of Young's module and the thermal expansion coefficient in a range not larger than 1.5.times.10.sup.-2 kg.multidot.mm.sup.-2 .multidot..degree. C..sup.-1, or a product of the thermal expansion coefficient and the film thickness in a range not larger than 2.0.times.10.sup.-5 mm /.degree. C. Preferably, the glass transition point of the used adhesive is set to a value in a range of 20.degree. C. to 80.degree. C., and the film thickness is set to a value in a range of 10 .mu.m to 100 .mu.m.

REFERENCES:
patent: 4711798 (1987-12-01), Ueda et al.
patent: 4990208 (1991-02-01), Kano
patent: 5219708 (1993-06-01), Hirata et al.
patent: 5360652 (1994-11-01), Kobayashi et al.
patent: 5540967 (1996-07-01), Toide et al.
patent: 5540988 (1996-07-01), Tachibana et al.
patent: 5764619 (1998-06-01), Nishiuchi et al.
patent: 5824385 (1998-10-01), Itoigawa et al.

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