Patent ID: 8454863

Claim:
A method of manufacturing a multi-layer optical information recording medium that has a signal surface, on which recording and reproduction are performed, and an isolation layer between adjacent signal recording layers for isolating said adjacent signal recording layers from each other, the method comprising the steps of: (a) forming an n+1 -th layer for a positive integer n; and (b) forming an n -th layer adjacent to said n+1 -th layer, wherein said isolation layer is formed by ann+1 number of layers consisting of first through n+1 -th layers that are stacked in an ascending order, said n+1 -th layer and said n -th layer are each formed so that an interface between said n+1 -th layer and said n -th layer includes a slope inclined with respect to said signal surface in a radius direction, a thickness distribution of said n+1 -th layer along the radius direction is opposite a thickness distribution of an n number of layers consisting of said first through n -th layers along the radius direction, and a thickness distribution of said isolation layer along the radius direction is substantially uniform.