Patent ID: 7684309
Filing Date: 2010-03-23
Classification: G11B,Y10T

Abstract:
1. An optical recording medium comprising: a first half-disc including a substrate and a first information layer including a first reflective layer formed on a first side of said substrate; a second half-disc bonded by an adhesive to a second side of said substrate of the first half-disc; and a cover layer over said first reflective layer, wherein said cover layer has a thickness of approximately 0.1 mm, said substrate of said first half-disc has a thickness in a range of 0.3 mm to 1.0 mm, and said first and second half-discs together have a combined thickness in a range of 0.8 mm to 1.3 mm, and wherein said first half-disc is configured for reading of information marks on the first information layer using a light beam reflected from the information bearing first side of the first half-disc without a reading beam traveling through said adhesive and said substrate of the first half-disc.