Apparatus for fabricating an optical information medium
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHisaki Miyamoto, Michiyoshi Nagashima, Kiyoshi Inoue, Sakae Noda
Life of this patent
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Abstract
The disk-shaped optical information medium of this invention includes: a first substrate having a center hole; a second substrate having a center hole; and a radiation curable resin interposed between the first and second substrates for bonding together the first and second substrates, wherein the optical information medium further includes a stopper for preventing the radiation curable resin from protruding into the center holes of the substrates, and a space between the first and second substrates of at least a half of a clamp region for clamping the optical information medium is filled with the resin.
Claims8
An apparatus for fabricating an optical information medium, comprising:
- means for applying a radiation curable resin to a first substrate, while the first substrate is being rotated, the first substrate having formed therein a stopper for preventing the radiation curable resin from protruding into a center hole, wherein the resin is applied to a portion of the first substrate circumferentially outwardly disposed on the first substrate with respect to the stopper, to form a donut-shaped resin layer;
- means for placing a second substrate on the first substrate;
- means for rotating the first and second substrates integrally;
- and
- means for irradiating the radiation curable resin with radioactive rays passing through at least one of the first and second substrates.
An apparatus for fabricating an optical information medium by bonding a first substrate having a center hole and a second substrate having a center hole with a radiation curable resin interposed therebetween, comprising:
- means for applying a first radiation curable resin on a portion of the first substrate closer to an inner circumference of the first substrate and applying a second radiation curable resin having a viscosity lower than the first radiation curable resin to a portion of the first substrate closer to an outer circumference of the first substrate while the first substrate is being rotated;
- means for placing the second substrate on the first substrate;
- means for rotating the first and second substrates integrally;
- and
- means for irradiating the radiation curable resins with radioactive rays passing through at least one of the first and second substrates.
An apparatus for fabricating an optical information medium by bonding a first substrate having a center hole and a second substrate having a center hole with a radiation curable resin interposed therebetween, comprising:
- means for applying a portion of the radiation curable resin on a portion of the first or second substrate closer to an inner circumference of the first or second substrate;
- means for applying the remainder of the radiation curable resin on a portion of the first substrate closer to an outer circumference of the first substrate while the first substrate is being rotated;
- means for placing the second substrate on the first substrate;
- means for rotating the first and second substrates integrally;
- and
- means for irradiating the radiation curable resin with radioactive rays passing through at least one of the first and second substrates.
An apparatus for fabricating an optical information medium by bonding together a first substrate having a center hole and a second substrate having a center hole with a radiation curable resin interposed therebetween, comprising:
- means for applying a hot melt adhesive to a portion of the first or second substrate closer to an inner circumference of the first or second substrate;
- means for applying the radiation curable resin to a portion of the first substrate closer to an outer circumference of the first substrate while the first substrate is being rotated;
- means for placing the second substrate on the first substrate;
- means for rotating the first and second substrates integrally;
- and
- means for irradiating the radiation curable resin with radioactive rays passing through at least one of the first and second substrates.
Dependencies are inferred from the claim text.