# US 2008/0187703 A1 · Content Replication Deterrent Method on Optical Discs > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0187703 A1 - Document ID: US20080187703A1 - Status: Published application - Kind: A1 - Application number: 12/034,889 - Filed: 2008-02-21 - Published: 2008-08-07 - Earliest claimed: 2002-04-10 - Assignees: Verification Technologies, Inc. - Inventors: Richard H. Selinfreund; Scott Gerger; Donald R. Goyette; Rakesh Vig; Junzhong Li - Web page: https://patentgrep.com/patent/US20080187703A1 ## CPC - G11B 23/282: {Limited play} - 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)} - 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 - G11B 7/26: Apparatus or processes specially adapted for the manufacture of record carriers - G11B 19/122: {involving the detection of an identification or authentication mark (record carriers indicating unauthorised or prior use G11B23/28)} - 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)} - G11B 20/00586: {said format change concerning the physical format of the recording medium} - G11B 20/00927: {wherein said defects or errors are generated on purpose, e.g. intended scratches} - G11B 23/281: {by changing the physical properties of the record carrier} - 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} - G11B 7/266: {Sputtering or spin-coating layers (sputtering in general C23C14/24; spin-coating in general B05D1/005)} - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) ## Abstract Through embodiments an optical medium and method of fabricating the optical medium including content replication deterrent features is disclosed. The medium includes protective features for preventing the unintentional activation of the content replication deterrent features by the ambient environment. ## Claims ### Claim 1 A method for fabricating an optical medium readable by an optical reader, said method comprising the steps of: molding a substrate so as to have a first major surface with information pits and information lands thereon and a second major surface that is relatively planar; applying a first reflective material over said first major surface so as to cover a portion of said first major surface but not all of said first major surface; applying an optical state change security material capable of converting from a first optical state to a second optical state upon exposure to the laser of an optical reader to the portion of said first major surface devoid of said first reflective material; applying a second reflective material over that portion of said first major surface wherein said optical state change security material is applied: and incorporating a protective material into said optical medium at least over an area encompassing said optical state change security material. ### Claim 2 (depends on 1) The method of claim 1 wherein the protective material comprises a filtering material that shields said optical state change security material from ambient radiation that could effectuate unintended changes in state. ### Claim 3 (depends on 1) The method of claim 1 wherein the said protective material is incorporated within the said substrate. ### Claim 4 (depends on 1) The method of claim 1 wherein the said protective material is incorporated as a layer supra to said optical state change security material. ### Claim 5 (depends on 1) The method of claim 1 wherein the said protective material is incorporated as a layer infra to said optical state change security material. ### Claim 6 (depends on 1) The method of claim 1 wherein the said protective material is a material that absorbs light of a specific band of wavelengths. ### Claim 7 (depends on 1) The method of claim 1 wherein the said protective material is a material that deflects light of a specific band of wavelengths. ### Claim 8 (depends on 1) The method of claim 1 wherein the said first reflective material and said second reflective material are of the same composition. ### Claim 9 An optical medium, readable by an optical reader, comprising: a substrate molded so as to have a first major surface with information pits and information lands thereon and a second major surface that is relatively planar; a first reflective material over said first major surface so as to cover a portion of said first major surface but not all of said first major surface; an optical state change security material, capable of converting from a first optical state to a second optical state upon exposure to the laser of an optical reader, applied to the portion of said first major surface devoid of said first reflective material; a second reflective material applied over that portion of said first major surface wherein said optical state change security material is applied: and a protective material incorporated into said optical medium at least over an area encompassing said optical state change security material. ### Claim 10 (depends on 9) The medium of claim 9 wherein the protective material comprises a filtering material that shields said optical state change security material from ambient radiation which could effectuate unintended changes in state ### Claim 11 (depends on 9) The medium of claim 9 wherein the said protective material is incorporated within the said substrate. ### Claim 12 (depends on 9) The medium of claim 9 wherein the said protective material is incorporated as a layer supra to said optical state change security material. ### Claim 13 (depends on 9) The medium of claim 9 wherein the said protective material is incorporated as a layer infra to said optical state change security material. ### Claim 14 (depends on 9) The medium of claim 9 wherein the said protective material is a material that absorbs light of a specific band of wavelengths. ### Claim 15 (depends on 9) The medium of claim 9 wherein the said protective material is a material that deflects light of a specific band of wavelengths. ### Claim 16 (depends on 9) The method of claim 9 wherein the said first reflective material and said second reflective material are of the same composition. ### Claim 17 A method for fabricating an optical medium readable by an optical reader, said method comprising the steps of: molding a substrate so as to have a first major surface with information pits and information lands thereon and a second major surface that is relatively planar; applying a first reflective material over said first major surface so as to cover a portion of said first major surface but not all of said first major surface; applying an optical state change security material capable of converting from a first optical state to a second optical state upon exposure to the laser of an optical reader to cover said first major surface; applying a second reflective material over that portion of said first major surface wherein said optical state change security material is applied: and incorporating a protective material into said optical medium at least over an area encompassing said optical state change security material. ### Claim 18 (depends on 17) The method of claim 17 wherein the protective material comprises a filtering material that shields said optical state change security material from ambient radiation that could effectuate unintended changes in state. ### Claim 19 (depends on 17) The method of claim 17 wherein the said protective material is incorporated within the said substrate. ### Claim 20 (depends on 17) The method of claim 17 wherein the said protective material is incorporated as a layer supra to said optical state change security material. ### Claim 21 (depends on 17) The method of claim 17 wherein the said protective material is incorporated as a layer infra to said optical state change security material. ### Claim 22 (depends on 17) The method of claim 17 wherein the said protective material is a material that absorbs light of a specific band of wavelengths. ### Claim 23 (depends on 17) The method of claim 17 wherein the said protective material is a material that deflects light of a specific band of wavelengths. ### Claim 24 (depends on 17) The method of claim 17 wherein the said first reflective material and said second reflective material are of the same composition. ### Claim 25 An optical medium, readable by an optical reader, comprising: a substrate molded so as to have a first major surface with information pits and information lands thereon and a second major surface that is relatively planar; a first reflective material over said first major surface so as to cover a portion of said first major surface but not all of said first major surface; an optical state change security material, capable of converting from a first optical state to a second optical state upon exposure to the laser of an optical reader, applied to cover said first major surface; a second reflective material applied over that portion of said first major surface wherein said optical state change security material is applied: and a protective material incorporated into said optical medium at least over an area encompassing said optical state change security material. ### Claim 26 (depends on 25) The medium of claim 25 wherein the protective material comprises a filtering material that shields said optical state change security material from ambient radiation which could effectuate unintended changes in state ### Claim 27 (depends on 25) The medium of claim 25 wherein the said protective material is incorporated within the said substrate. ### Claim 28 (depends on 25) The medium of claim 25 wherein the said protective material is incorporated as a layer supra to said optical state change security material. ### Claim 29 (depends on 25) The medium of claim 25 wherein the said protective material is incorporated as a layer infra to said optical state change security material. ### Claim 30 (depends on 25) The medium of claim 25 wherein the said protective material is a material that absorbs light of a specific band of wavelengths. ### Claim 31 (depends on 25) The medium of claim 25 wherein the said protective material is a material that deflects light of a specific band of wavelengths. ### Claim 32 (depends on 25) The method of claim 25 wherein the said first reflective material and said second reflective material are of the same composition.