Optical recording medium, and method for producing optical recording medium

A method for producing an optical recording medium having four information recording surfaces, the method comprising:

• a step of forming, on a substrate, a light transmissive layer, a first information recording surface, a first intermediate layer, a second information recording surface, a second intermediate layer, a third information recording surface, a third intermediate layer, and a fourth information recording surface, wherein
• the first through the fourth information recording surfaces, the first through the third intermediate layers, and the light transmissive layer are formed in such a manner that a thickness of the light transmissive layer and thicknesses of the first through the third intermediate layers satisfy:
• 52.0 μm≦t1≦55.0 μm,
• 10.0 μm≦t2≦13.0 μm,
• 18.0 μm≦t3≦21.0 μm, and
• 14.0 μm≦t4≦17.0 μm, where
• t1 is the thickness of the light transmissive layer,
• t2 is the thickness of the first intermediate layer,
• t3 is the thickness of the second intermediate layer, and
• t4 is the thickness of the third intermediate layer.

An optical recording medium comprising three information recording surfaces, the optical recording medium satisfying:

• t3−t2≧1 μm,
• t2≧10 μm, and
• t1−(t2+t3)≧1 μm, where
• t1 is a thickness between a surface of the optical recording medium, and the first information recording surface closest to the surface of the optical recording medium,
• t2 is a thickness between the first optical recording surface, and the second information recording surface second closest to the surface of the optical recording medium, and
• t3 is a thickness between the second optical recording surface, and the third information recording surface farthest from the surface of the optical recording medium.

A method for producing an optical recording medium having three information recording surfaces, the method comprising:

• a step of forming, on a substrate, a light transmissive layer, a first information recording surface, a first intermediate layer, a second information recording surface, a second intermediate layer, and a third information recording surface, wherein
• the first through the third information recording surfaces, the first and the second intermediate layers, and the light transmissive layer are formed in such a manner that a thickness of the light transmissive layer and thicknesses of the first and the second intermediate layers satisfy:
• 55.0 μm≦t1≦59.0 μm,
• 16.0 μm≦t2≦20.0 μm, and
• 23.0 μm≦t3≦27.0 μm, where
• t1 is the thickness of the light transmissive layer,
• t2 is the thickness of the first intermediate layer, and
• t3 is the thickness of the second intermediate layer.