Method and apparatus for bonding optical disc substrates together, and method for supplying liquid material
First Claim
1. An apparatus for bonding two optical disc substrates together by joining the optical disc substrates together with an adhesive and by curing the adhesive, which comprises an adhesive-supplying nozzle for supplying the adhesive onto at least one of the optical disc substrates, an electrode means placed in contact with or in the vicinity of the surface of the optical disc substrate which is opposite to the surface which faces the adhesive-supplying nozzle, and an electric power supply for generating an electric field between the electrode means and the adhesive-supplying nozzle.
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Abstract
The object of the present invention is to significantly inhibit the formation of voids between substrates bonded together when a liquid adhesive is supplied onto an optical disc substrate or when the optical disc substrate is bonded to another optical disc substrate. Accordingly, the present invention discloses a method for bonding two optical disc substrates together which comprises the steps of joining the optical disc substrates together with an adhesive and curing the adhesive, wherein the adhesive is supplied onto the optical disc substrate by an electric field formed between the adhesive-supplying nozzle, for supplying the adhesive onto the optical disc substrate, and the optical disc substrate, and the two optical disc substrates are then joined together and subjected to spun by a spinning process.
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Citations
12 Claims
- 1. An apparatus for bonding two optical disc substrates together by joining the optical disc substrates together with an adhesive and by curing the adhesive, which comprises an adhesive-supplying nozzle for supplying the adhesive onto at least one of the optical disc substrates, an electrode means placed in contact with or in the vicinity of the surface of the optical disc substrate which is opposite to the surface which faces the adhesive-supplying nozzle, and an electric power supply for generating an electric field between the electrode means and the adhesive-supplying nozzle.
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11. An optical disc bonding apparatus for joining two optical disc substrates together with an adhesive and forming an optical disc, the apparatus comprising:
- a device for forming an electric field between said two optical disc substrates, wherein
an end of a liquid film of said adhesive which is supplied onto one of said optical substrates tapers, thereby making a contact area between said end of said liquid film and the other of said optical disc substrates which is opposed to said end smaller by an effect of said electric field, and generation of voids in said liquid film is prevented.
- a device for forming an electric field between said two optical disc substrates, wherein
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12. An optical disc bonding apparatus for joining two optical disc substrates together with an adhesive and forming an optical disc, the apparatus comprising:
- a device for forming an electric field between said two optical disc substrates, wherein
an end of a liquid film of said adhesive which is supplied onto one of said optical substrates tapers, thereby making a contact area between said end of said liquid film and other liquid film of said adhesive which is supplied onto the other of said optical disc substrates and is opposed to said end smaller by an effect of said electric field, and generation of voids in said liquid film is prevented.
- a device for forming an electric field between said two optical disc substrates, wherein
Specification