Sony Group Corporation

Kao Soap Company, Ltd.

Minoru Kikuchi

Takeshi Yoshida

Yunosuke Nakagawa

Yoko Sekiguchi

Provided is an optical recording medium capable of suppressing sticking between the optical recording mediums in a case where a plurality of optical recording mediums are superimposed on each other. The optical recording medium includes an optical recording medium main body having a first surface and a second surface, and a first convex structure layer provided on the first surface. The first convex structure layer has a surface provided with a plurality of first convexities, and includes first particles and a first resin material. The plurality of first convexities are formed by a part of the first particles included in the first convex structure layer, the part of the first particles protruding from the surface of the first convex structure layer.

Optical recording medium

There is provided a method of producing a multilayer optical recording medium through which the occurrence of burrs is reduced. The method of producing a multilayer optical recording medium includes, when a UV curable adhesive is interposed between a first disk and a second disk, the first disk and the second disk are rotated, and when at least one of the vicinities of inner circumferential edges and the vicinities of outer circumferential edges of the first disk and the second disk is masked with a mask member, emitting ultraviolet rays for preliminarily curing the UV curable adhesive from the side of a light emission surface of the first disk during rotation.

Method of producing multilayer optical recording medium and device for producing multilayer optical recording medium

In the preparation of foamable sodium percarbonate, a cooling step is employed after a heat treatment at 110.degree.-135.degree. C. for 5-60 minutes.

Growing community of inventors

Tokyo, Japan

Minoru Kikuchi