Abstract An optical element is provide which has a durability enhancing layer. There is provided an optical disk comprising a support having on one surface thereof, in order: a) a recording layer such that said recording layer does not cover the entire surface of said disk but leaves an annular portion at the outer diameter; b) a reflective layer such that said reflective layer does not cover the entire surface of said disk but leaves an annular portion at the outer diameter; c) a first protective layer having a thickness between about 2-20 μm, said protective layer being of a material having good adhesion to said support and covering a portion of the surface of said disk having said reflective layer, including at least a portion of said annular portion; d) a second protective layer having a thickness of at least about 3 μm, said second layer covering at least the area of said surface having the reflective layer and having good adhesion to said first protective layer. In another aspect, there is provided a method wherein the first protective layer is spin coated and the second is screen printed.
An optical disk comprising a support material formed of an optically transparent resin, having thereon: a) a recording layer such that said recording layer does not cover the entire surface of said disk but leaves an annular portion of approximately 1.4 mm at the outer diameter; b) a reflective layer such that said reflective layer does not cover the entire surface of said disk but leaves an annular portion of approximately 0.77 mm at the outer diameter; c) a first protective layer having a thickness between about 2-20 μm, said protective layer being a resinous material having good adhesion to said support and covering a portion of the surface of said disk having said reflective layer, including at least a portion of said annular portion; d) a second protective layer having a thickness of about 3 μm, said second layer covering at least the area of said surface having the reflective layer and having good adhesion to said first protective layer.
Claim 2
Dependent Claim
161 words
An optical disk comprising a support material formed of an optically transparent resin, having thereon: a) a recording layer such that said recording layer does not cover the entire surface of said disk but leaves an annular portion of approximately 1.4 mm at the outer diameter; b) a reflective layer such that said reflective layer does not cover the entire surface of said disk but leaves an annular portion of approximately 0.77 mm at the outer diameter; c) a first protective layer having a thickness between about 2-20 μm, said protective layer being a resinous material having good adhesion to said support and covering a portion of the surface of said disk having said reflective layer, including at least a portion of said annular portion; d) a second protective layer having a thickness of about 3 μm, said second layer covering at least the area of said surface having the reflective layer and having good adhesion to said first protective layer.
Claim 3
Dependent Claim
48 words
An optical disk according to claim 1 wherein said support is a polycarbonate and said protective layers are photo curable acrylates; the acrylates in said first protective layer having the consistency of a lacquer and the acrylates in said second protective layer having the consistency of an ink.
Claim 4
Dependent Claim
19 words
An optical disk according to claim 1 wherein said first protective layer extends over the edge of the disk.
Claim 5
Dependent Claim
15 words
An optical disk according to claim 1 wherein said second protective layer includes matte particles.
Claim 6
Dependent Claim
13 words
An optical disk according to claim 4 wherein said particles are silicon dioxide.