| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize enhancement in sensitivity of reproduction for a super-resolution optical information recording medium. <P>SOLUTION: The optical information recording medium is laminated with at least a light transmitting layer 10, an information recording layer 20 and a substrate 30 in this order from a surface for incidence of reproducing light. This optical information recording medium reproduces a signal with mark length shorter than resolution limit of a reproducing device for an optical system by heating a reproducing film 21 with heat produced in a light absorbing layer 22 due to irradiation with the reproducing light. The light transmitting layer 10 has, for example, a resin layer 12 with low thermal conductivity comprising transparent acrylic adhesion resin in order to stick a polycarbonate film 11 on the information recording layer 20. The transparent acrylic adhesion resin for forming this transparent resin layer 12, compared with UV hardening resin used as material for conventional light transmitting layer, is formed with coarser organization, low in the thermal conductivity, and has a role for preserving the heat produced in the information recording layer 20. The sensitivity in the reproduction is enhanced because this enable the temperature rise for the reproducing film 21 to be performed efficiently. <P>COPYRIGHT: (C)2007,JPO&INPIT |
