Patent ID: 6335071
Filing Date: 2002-01-01
Classification: G11B,Y10T

Abstract:
A recording medium having a recording film, said recording film comprising at least a first layer and a second layer laminated, and said first layer and said second layer reacting each other upon application of an external energy to vary an optical characteristic of said recording film to record information, characterized in that:said first layer comprises at least one member selected from the group consisting of a metal and a substance including the metal, said metal or said substance including the metal generating energy by 500 kJ or more when said metal or said substance reacts with 1 mol of oxygen molecules, and having a melting point or a decomposition temperature of from 100 to 300Â° C.; said second layer comprises at least an oxide or a substance including oxygen as a constituent element, said oxide or said substanace including oxygen requiring energy by 550 kJ or less when said oxide or said substance dissociates 1 mol of oxygen molecules; and said reaction of said first layer and said second layer is an exothermic reaction.