Patent ID: 6117284
Filing Date: 2000-09-12
Classification: B29D,B32B,G11B,Y10T

Abstract:
A method of making a dual-layer disc suitable for use as one of the two substrate structures of a DVD-14 or DVD-18 disc comprising the steps of:(a) molding a first substrate to have a data layer and coating said data layer with a semireflective coating to form a first substrate structure,(b) molding a second substrate to have a data layer and coating said data layer with a fully reflective coating to form a second substrate structure,(c) placing an adhesive on the semireflective coating of said first substrate structure,(d) placing said first and second substrate structures in contact with each other with said fully reflective coating on said second substrate structure bearing against the adhesive on said first substrate structure so that said fully reflective coating transfers from said second substrate structure to said first substrate structure, and(e) separating said second substrate structure from said first substrate structure following transfer of said fully reflective coating.