Patent ID: 6654532
Filing Date: 2003-11-25
Classification: G03H,G11B,G11C

Abstract:
A read-only multilayer holographic memory card comprising:a plurality of laminated structures, each laminated structure comprising: a cladding layer having a refractive index of a first predetermined value; and a core layer having a refractive index of a second predetermined value exceeding said first predetermined value, wherein the cladding layer and/or the core layer have physical irregularities formed thereon for thereby providing a periodic scattering effect which is achieved without performing holographic recording, and wherein said cladding layer and said core layer comprise polymeric materials selected from the group consisting essentially of polyacrylic resins, polycarbonate resins, polyimide resins, polyamide resins, polyether resins, polyolefin resins, silicone resins, ultra-violet radiation curable resins and thermosetting resins.