Copy-protected optical media and method of manufacture thereof

• US 20050153109A1
• Filed: 12/01/2004
• Published: 07/14/2005
• Est. Priority Date: 06/30/2000
• Status: Active Grant

• Current Assignee: Verification Technologies, Inc. (Sun Chemical, Inc.)
• Original Assignee: Verification Technologies, Inc. (Sun Chemical, Inc.)
• Inventors: Vig, Rakesh, Drew, Jeffrey M., Selinfreund, Richard H., Goyette, Donald R.
• Granted Patent: US 7,303,803 B2
• Time in Patent Office: Days
• US Class Current: 428/195.100
• CPC Class Codes: G11B 19/04 Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
• CPC Class Codes: G11B 19/12 by sensing distinguishing features of or on records, e.g. diameter end mark
• CPC Class Codes: G11B 19/122 involving the detection of an identification or authentication mark record carriers indicating unauthorised or prior use G11B23/28
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00586 said format change concerning the physical format of the recording medium
• CPC Class Codes: G11B 20/00608 wherein the material that the record carrier is made of is altered, e.g. adding reactive dyes that alter the optical properties of a disc after prolonged exposure to light or air
• CPC Class Codes: G11B 20/00768 wherein copy control information is used, e.g. for indicating whether a content may be copied freely, no more, once, or never, by setting CGMS, SCMS, or CCI flags
• CPC Class Codes: G11B 20/00876 wherein physical copy protection means are attached to the medium, e.g. holograms, sensors, or additional semiconductor circuitry
• CPC Class Codes: G11B 20/00927 wherein said defects or errors are generated on purpose, e.g. intended scratches
• CPC Class Codes: G11B 2007/24312 group 14 elements (e.g. Si, Ge, Sn)
• CPC Class Codes: G11B 2007/24314 group 15 elements (e.g. Sb, Bi)
• CPC Class Codes: G11B 2007/24316 group 16 elements (i.e. chalcogenides, Se, Te)
• CPC Class Codes: G11B 2007/2571 containing group 14 elements except carbon (Si, Ge, Sn, Pb)
• CPC Class Codes: G11B 23/28 Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs write-protect devices for tapes G11B23/042, G11B23/08714; dummy cassettes for locking in the drive G11B33/005
• CPC Class Codes: G11B 23/281 by changing the physical properties of the record carrier
• CPC Class Codes: G11B 7/00736 Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information sector headers or adresses in prepits G11B7/00745; address data in track wobble G11B7/24082
• CPC Class Codes: G11B 7/0079 Zoned data area, e.g. having different data structures or formats for the user data within data layer, Zone Constant Linear Velocity [ZCLV], Zone Constant Angular Velocity [ZCAV], carriers with RAM and ROM areas
• CPC Class Codes: G11B 7/013 for discrete information, i.e. where each information unit is stored in a distinct discrete location , e.g. digital information formats within a data block or sector
• CPC Class Codes: G11B 7/24 Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the arrangement of information on the carrier G11B7/007
• CPC Class Codes: G11B 7/243 comprising inorganic materials only, e.g. ablative layers
• CPC Class Codes: G11B 7/2433 : Metals or elements of Groups 13, 14, 15 or 16 of the Periodic Table, e.g. B, Si, Ge, As, Sb, Bi, Se or Te
• CPC Class Codes: G11B 7/244 : comprising organic materials only
• CPC Class Codes: G11B 7/246 : containing dyes
• CPC Class Codes: G11B 7/2472 : cyanine
• CPC Class Codes: G11B 7/252 : of layers other than recording layers
• CPC Class Codes: G11B 7/2534 : polycarbonates [PC]
• CPC Class Codes: G11B 7/257 : of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
• CPC Class Codes: G11B 7/2572 : consisting essentially of organic materials
• CPC Class Codes: G11B 7/2578 : consisting essentially of inorganic materials
• CPC Class Codes: G11B 7/26 : Apparatus or processes specially adapted for the manufacture of record carriers
• CPC Class Codes: G11B 7/261 : Preparing a master, e.g. exposing photoresist, electroforming
• CPC Class Codes: G11B 7/266 : Sputtering or spin-coating layers sputtering in general C23C14/24; spin-coating in general B05D1/005
• CPC Class Codes: Y10T 428/21 : Circular sheet or circular blank
• CPC Class Codes: Y10T 428/24802 : Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/31507 : Of polycarbonate

Abstract

A computer-readable medium having material at a select position therein and containing instructions for controlling an optical reader to cause the optical reader to re-read the position having the material one or more times to elicit a measurable parameter at such position.

Claims

1. A computer-readable medium having material at a select position thereon and containing instructions for controlling an optical reader to cause the optical reader to re-read the position having the material one or more times to elicit a measurable parameter at such a position.

2. The computer-readable medium of claim 1 wherein the material is a light-changeable material.

3. The computer-readable medium of claim 2 wherein the measurable parameter is a light change.