Substrate of optical disc

Details Substrate of optical disc Substrate of optical disc

1990-07-27

1991-12-17

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428409, 4284111, 428413, 369272, 346 76L, 3461351, B32R 302

Patent

active

050734270

ABSTRACT:
A substrate for an optical disc is disclosed, which comprises a transparent hydrocarbon resin having a softening point of not less than 100.degree. C., the surface thereof having been contact treated with a fluorine-containing gas so that the treated surface has a contact angle with water of not more than 90.degree. and the weight gain due to the treatment does not exceed 1% by weight. The substrate exhibits excellent adhesion to a recording layer formed thereon and excellent heat resistance.

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