Optical information recording medium and method for manufacturing the same

A manufacturing method for an optical information recording medium where a transparent protective layer, a signal recording layer and a supporting substrate are formed in this order from the light incident side for recording and reproducing, and the transparent protective layer is formed of a resin film, a boundary layer and an adhesive layer, layered in this order from the light incident side for recording and reproducing, and the thickness of the transparent protective layer is 10 μm to 200 μm, the method comprising:

• forming the boundary layer on the resin film;
• and
• placing the adhesive layer between the boundary layer and the supporting substrate on which the signal recording layer has been formed, and making the boundary layer stick to the supporting substrate in such a manner that the boundary layer and the signal recording layer face each other,
• wherein the resin film has unevenness A on the surface contacting the boundary layer, and accordingly, the boundary layer has unevenness B on the surface contacting the adhesive layer where the unevenness A is existing,
• wherein the height or depth of the unevenness B is smaller than the height or depth of the unevenness A,
• wherein the unevenness A has a height or depth ranging from 0.3 μm to 3 μm, and
• when nf, na and ni represent index of refraction of the resin film, index of refraction of the adhesive layer and index of refraction of the boundary layer, respectively, the indices nf, na and ni satisfy the following equation:
• na<ni≦nf;
• or
• na>ni≧nf,
• and further satisfy the following equations:
• |nf−ni|≦0.08;
• and
• |ni−na|≦0.1.