Optical information recording medium and manufacturing method and recording/reproducing method for the same

An optical information recording medium comprising a multilayer structure comprising a first information layer to a nth information layer that are stacked in order from the laser beam incident side (n is a natural number not less than 2), at least one of the first information layer to the nth information layer comprising:

• a first protective film;
• a first interface film;
• a recording film having optical characteristics that are changed reversibly by laser beam irradiation;
• a second interface film;
• a second protective film;
• and
• a reflective film, present in the indicated order from a laser beam incident side,
• wherein the first interface film includes an oxide of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, and Si, and
• the second interface film includes carbon or a carbide of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, and Si.

An optical information recording medium comprising a multilayer structure comprising a first information layer to a nth information layer that are stacked in order from a laser beam incident side (n is a natural number not less than 2), at least one of the first information layer to the nth information layer comprising:

• a first protective film;
• a recording film having optical characteristics that are changed reversibly by laser beam irradiation;
• an interface film;
• a second protective film;
• and
• a reflective film, present in the indicated order from the laser beam incident side,
• wherein the interface film includes a carbide of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, and Si and has a thickness of not less than 0.3 nm and up to 1 nm.