US 2004O152013A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2004/0152013 A1 Olson et al. (43) Pub. Date: Aug. 5, 2004 (54) LIMITED PLAY OPTICAL MEDIA DEVICE Related U.S. Application Data WITH BARRIER LAYERS (60) Provisional application No. 60/444,431, filed on Feb. 3, 2003. (76) Inventors: Daniel Robert Olson, Voorheesville, NY (US); Marc Brian Wisnudel, Publication Classification Clifton Park, NY (US); Marc (51) Int. Cl. ................................................... G11B 7124 Schaepkens, Ballston Lake, NY (US); (52) U.S. Cl. ..................... 430/270.11; 430/945; 369/284 Robert Franklin Thompson, Kennebunk, ME (US) (57) ABSTRACT The present disclosure relates to a limited play optical Storage media and a method for limiting access to data Correspondence Address: thereon. This Storage media includes a first Substrate; a Raymond E. Farrell, Esq. reflective layer; a data Storage layer disposed between Said Carter, DeLuca, Farrell & Schmidt, LLP first Substrate and Said reflective layer; a reactive layer Suite 225 comprising at least one reactive material disposed on Said at 445 Broad Hollow Road least one reflective layer; an optically transparent Second Melville, NY 11747 (US) Substrate disposed between the reactive layer and a laser incident Surface of the optical Storage media; and an oxygen permeable barrier layer disposed between the reactive layer (21) Appl. No.: 10/657,631 and a laser incident Surface of the optical Storage media, Said reactive layer having an initial percent reflectivity of about 50% or greater and a percent reflectivity of about 45% or (22) Filed: Sep. 8, 2003 less after exposure to oxygen. Limited-play "reverse-mastered"DVD-5 With reactive dye in adhesive and topical barrier coating Polycarbonate (L1) XXX& XXX XXXX X X X X X X X X X X X X X X X X X X X X X YX YX{XXXXX& XXX & S& Polycarbonate (LO) 11 13 Patent Application Publication Aug. 5, 2004 Sheet 1 of 8 US 2004/0152013 A1 FIG. 1 O-)Ne 5 3 10 12 FIG. 2 wasya. FIG. 3 Oxidation Kinetics of leucomethylene blue to methylene blue in a topical PMMA coating on a DVD O O 20 40 60 80 100 120 Time Patent Application Publication Aug. 5, 2004 Sheet 2 of 8 US 2004/0152013 A1 FIG. 4 UV Topcoat on PMMAleuco methylene blue basecoat 40 30 PMMAILeucomethylene blue as 20 basecoat, no UV topCOat 10 O 0.0 5.0 10.0 15.0 20.0 Time Hours FIG. 5 Comparison of Kinetics of Samples With and Without Barrier Coating O 20 40 60 80 100 Time Hours -B-A. no topcoat -e-B. topc cured 6s after (6s total) a C. topc Cured 24s after (24s total) -0-D. topc cured 6sec before (12s total) ----A---- E. topc cured 24s before (30 total) Patent Application Publication Aug. 5, 2004 Sheet 3 of 8 US 2004/0152013 A1 FIG. 6 Limited-play "reverse-mastered" DVD-5 with reactive dye in adhesive and topical barrier Coating Polycarbonate (L1) XXXXXXXXXXX-Y, Bonding Adhesive YYX Containing YX XXYYX Reactive Dye S3.OXOXOXXOXOXOXX Polycarbonate (LO) FIG. 7 Limited-play "reverse-mastered" DVD-5 with reactive dye Coating and topical barrier Coating 15 Polycarbonate (L1) 2 Reflective Layer 2 XXXXXXXXXXXXXXXX KXXXXXXXXXXXXXXX x:Bonding{XXXXXXXXXXXXXXX AdhesiveXKXXXXXXXXXXXXXXX 19 III Reactive Dye Coating II 21 Polycarbonate (LO) 11 Poyatonate to 13 Patent Application Publication Aug. 5, 2004 Sheet 4 of 8 US 2004/0152013 A1 FIG. 8 Limited-play "reverse-mastered" DVD-5 with reactive dye coating and topical barrier coating Polycarbonate (L1) s URactive Dye Coating III XBondingCXXXXXXXXXXXXXXXXXXXXXXXX xBonding AdhesiveXAdhesivexKXOXOXOXOXOXOXOXOXOXOXOXOXOXOX Polycarbonate (LO) NBarrier Layer N Patent Application Publication Aug. 5, 2004 Sheet 5 of 8 US 2004/0152013 A1 FIG. 9 Limited-play "reverse-mastered" DVD-5 with reactive dye in adhesive and barrier layer Polycarbonate (L1) XX Bonding Adhesive Containing Reactive Dye X NBarrier Layer N Polycarbonate (LO) FIG. 10 Limited-play "reverse-mastered"DVD-5 with reactive dyein adhesive and barrier layer Polycarbonate (L) NBarrier Layer N KXXXXXXXXXXXX Bonding Adhesive Containing Reactive Dye XXXXXXXXXX XXX Polycarbonate (LO) Patent Application Publication Aug. 5, 2004 Sheet 6 of 8 US 2004/0152013 A1 FIG 11 Limited-play "reverse-mastered" DVD-5 with reactive dye coating and barrier layer Polycarbonate (L) HII Reactive Dye Coating III XBondingXXXXXXXXXXXXXXX AdhesiveXXXX XXXX XXXXXX XXX NBarrier Layer N Polycarbonate (L0) FIG. 12 15 Polycarbonate (L) 2Reflective Layer Z2 III Reactive Dye Coating III 21 13 SeeSXXX XXXXX XXXX XXXX XXX XXXX XXXXXXX XXX 19 alA-4A-aa-A-4alaala-AA-AA-AA-AA-AA-AA-A-a-AA-4AXX Bonding Adhesive XXX: a 4AAAA Polycarbonate (L0) 11 Patent Application Publication Aug. 5, 2004 Sheet 7 of 8 US 2004/0152013 A1 FIG. 13 Polycarbonate (L1) XXXXXXXXXXXXXX e QXXX XXX XXXX XXX QX OXOXOXBonding AdhesiveXC OXOXOXOXOXX C XXXXXMit Reactive Dye Coating& MM Polycarbonate (LO) Patent Application Publication Aug. 5, 2004 Sheet 8 of 8 US 2004/0152013 A1 FIG. 14 Limited-play DVD-9 with topical barrier coating 15 Polycarbonate (L1) 2. Reflective Layer 2 &CXXXXXXXXXXXXXXX s? Bonding Adhesive Containing Reactive DWey KXXXXXXX)&XXXXXXXX 17 III Semireflective Layer II 23 Polycarbonate (LO) 11 13 FIG. 15 Limited-play DVD-9 with internal barrier coating Polycarbonate (L1) XBondingCXXX CX Adhesive Containing Reactive DyeX(XXX IIIBarrier Layer-- II4YYYYYYY Polycarbonate (LO) US 2004/0152013 A1 Aug. 5, 2004 LIMITED PLAY OPTICAL MEDIA DEVICE WITH 0008 Limited play optical discs are disclosed in U.S. Pat. BARRIER LAYERS Nos. 6,011,772, 5,815,484, 6,343,063 and 6,338.933 and U.S. patent application Ser. No. 2003/0002431. U.S. Pat. 0001. This application claims priority to U.S. Provisional No. 5,815,484 teaches that limited-play optical discs can be Application No. 60/444,431 filed Feb. 3, 2003, the contents made by Superimposing a film containing an oxygen Sensi of which are incorporated by reference herein. tive, reduced form of a dye, including methylene blue, over BACKGROUND OF THE INVENTION the Surface of the data structures on a disc. U.S. Pat. No. 0002 This disclosure relates to novel limited play storage 6,343,063 describes the use of barrier layers releasably media with limited playability to minimize the risk of loss of coupled to discs. U.S. patent application Ser. No. 2003/ intellectual property. 0002431 discloses placing a reactive layer between a sub strate and the laser incident Surface of a DVD. 0.003 Optical, magnetic and magneto-optic media are primary Sources of high performance Storage technology 0009. There is a great desire on the part of movie studios which enables high Storage capacity coupled with a reason to protect their intellectual property. Commercialization of able price per megabyte of Storage. Use of optical media has limited-play data Storage media that can be easily defeated become widespread in audio, Video, and computer data to afford data Storage media with unlimited playability applications in Such formats as compact disk (CD), digital would present an unacceptable risk of losing intellectual versatile disk (DVD) including multi-layer structures like property. It is also preferable to develop Systems utilizing DVD-5, DVD-9, and multi-sided formats such as DVD-10, barrier layers that are not releasably coupled to discs. and DVD-18, magneto-optical disk (MO), and other write once and re-writable formats such as CD-R, CD-RW, DVD BRIEF DESCRIPTION OF THE INVENTION R, DVD-RW, DVD+RW, DVD-RAM, and the like, herein 0010. The present disclosure relates to limited play opti after collectively "data Storage media”. In these formats, cal Storage media and a method for limiting access to data data are encoded onto a Substrate into a digital data Series. In pre-recorded media, Such as CD, the data are typically pits thereon. This Storage media comprises: and grooves formed on the Surface of a plastic Substrate 0011) a first Substrate; through a method Such as injection molding, Stamping or the like. 0012) at least one reflective layer; 0004. In recordable media, the data are encoded by laser, 0013 a data storage layer disposed between said which illuminates an active data layer that undergoes a phase first Substrate and Said at least one reflective layer; change, thus producing a Series of highly-reflecting or non-reflective regions making up the data Stream. In these 0014 a reactive layer comprising at least one reac formats, a laser beam first travels through a plastic Substrate tive material disposed on Said at least one reflective before reaching the data layer. At the data layer, the beam is layer; either reflected or not, in accordance with the encoded data. 0.015 an opticallvp y transparentp second Substrate dis The laser light then travels back through the plastic and into posed between the reactive layer and a laser incident an optical detector System where the data are interpreted. Surface of the optical Storage media; and 0005. In some applications, it is desirable to have a limited life for an optical disc. For example, Sample com 0016 an oxygen permeable barrier layer disposed puter programs are provided to potential customers in order between the reactive layer and a laser incident Sur to entice them to purchase the Software. The programs are face of the optical Storage media, intended to be used for a limited period of time. Addition 0017 said reactive layer having an initial percent reflec ally, music and movies are currently rented for a limited time tivity of about 50% or greater and a percent reflectivity of period. In each of these applications and others, when that about 45% or less after exposure to oxygen. time has expired, the disc must be returned.