Abstract: A production method of and a production apparatus for an optical recording disc comprising two bonded round substrates, capable of obtaining a high quality optical recording disc by drastically reducing the number of bubbles remaining in a cured ultraviolet ray curing type resin of the completed optical recording disc. An adhesive is applied on a predetermined position of the upper surface of a first round substrate. The first round substrate applied with the adhesive is reversed. The reversed first round substrate and a second round substrate are bonded with each other via the adhesive on the first round substrate.

Abstract: This invention relates to how to obtain an optical recording disc with a good quality, capable of achieving a beautiful outline shape of the inner peripheral part side rim part of the cured ultraviolet ray curing type resin substantially concentrically even in the case there is irregularity of the wettability of both round substrates with respect to the ultraviolet ray curing type resin, and capable of providing an even film thickness of the resin with the film thickness controlled to a predetermined value or less even in the case there are irregularity of the wettability of both round substrates, difficulty in controlling the centrifugal force applied on the resin, irregularity of the plate thickness of both round substrates, or the like.

Abstract: This invention relates to how to obtain an optical recording disc with a good quality, capable of achieving a beautiful outline shape of the inner peripheral part side rim part of the cured ultraviolet ray curing type resin substantially concentrically even in the case there is irregularity of the wettability of both round substrates with respect to the ultraviolet ray curing type resin, and capable of providing an even film thickness of the resin with the film thickness controlled to a predetermined value or less even in the case there are irregularity of the wettability of both round substrates, difficulty in controlling the centrifugal force applied on the resin, irregularity of the plate thickness of both round substrates, or the like.

Abstract: A production method of and a production apparatus for an optical recording disc comprising two bonded round substrates, capable of obtaining a high quality optical recording disc by drastically reducing the number of bubbles remaining in a cured ultraviolet ray curing type resin of the completed optical recording disc.

Abstract: This invention relates to how to obtain an optical recording disc with a good quality, capable of achieving a beautiful outline shape of the inner peripheral part side rim part of the cured ultraviolet ray curing type resin substantially concentrically even in the case there is irregularity of the wettability of both round substrates with respect to the ultraviolet ray curing type resin, and capable of providing an even film thickness of the resin with the film thickness controlled to a predetermined value or less even in the case there are irregularity of the wettability of both round substrates, difficulty in controlling the centrifugal force applied on the resin, irregularity of the plate thickness of both round substrates, or the like.