Structure, system, method, and recording medium of implementing a directed self-assembled security pattern

• US 10,315,451 B2
• Filed: 08/21/2018
• Issued: 06/11/2019
• Est. Priority Date: 02/29/2016
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Briggs, Benjamin David, Clevenger, Lawrence A., DeProspo, Bartlet H., Rizzolo, Michael
• Primary Examiner(s): Liu, Li
• Application Number:
  US16/106,600
• Publication Number:
  US 20180354291A1
• Time in Patent Office: 294 Days
• CPC Class Codes: B42D 25/24 Passports
• CPC Class Codes: B42D 25/29 Securities; Bank notes
• CPC Class Codes: B42D 25/355 Security threads
• CPC Class Codes: G06F 16/93 Document management systems
• CPC Class Codes: G06V 20/80 Recognising image objects characterised by unique random patterns
• CPC Class Codes: G06V 20/95 Pattern authentication; Markers therefor; Forgery detection

Abstract

An anti-counterfeiting method, system, and non-transitory computer readable medium including a transfer circuit configured to transfer a Directed Self-Assembly (DSA) pattern including a unique and randomized pattern onto a strip, an embedding circuit configured to embed the strip on a document, and a verification circuit configured to verify that the unique and randomized pattern embedded on the document corresponds to the document.

Claims

1. An anti-counterfeiting system, comprising:

a transfer circuit configured to transfer a Directed Self-Assembly (DSA) pattern including a unique and randomized pattern onto a strip;

an embedding circuit configured to embed the strip on a document; and

a verification circuit configured to verify that the unique and randomized pattern embedded on the document corresponds to the document,

wherein the DSA is formed by using different length polymer chains,

wherein an alternating structure aligns end to end by solidifying the two different length polymer chains on a neutral substrate, and

wherein one of the polymer chains is extracted to receive randomly oriented domains by not using a guiding pattern.

2. The system of claim 1, further comprising an analysis circuit that stores a unique identifier for the unique and randomized pattern based on the document in a database, and

wherein the verification circuit verifies that the unique and randomized pattern corresponds to the document based on the unique identifier stored in the database.

3. The system of claim 2, wherein the embedding circuit embeds the unique and randomized pattern onto fibers of the document.

4. The system of claim 2, wherein the unique and randomized pattern covers an entirety of the strip, and

wherein the analysis circuit analyzes a portion of the unique and randomized pattern covering the entirety of the strip and stores a unique identifier associated with the portion of the unique and randomized pattern in a database.

5. The system of claim 2, wherein the unique and randomized pattern covers an entirety of the strip, and

wherein the analysis circuit analyzes an entirety of the unique and randomized pattern covering the entirety of the strip and stores a unique identifier associated with the entirety of the unique and randomized pattern in a database.

6. The system of claim 2, wherein the analysis circuit analyzes the unique and randomized pattern after the strip including the unique and randomized pattern is embedded onto the document.

7. The system of claim 1, wherein the embedding circuit embeds the unique and randomized pattern onto fibers of the document.

8. The system of claim 1, wherein the verification circuit is further configured to learn errors between a current unique and randomized pattern and an original unique and randomized pattern such that the verification circuit verifies that the unique pattern corresponds to the document with errors in the current unique pattern.

9. The system of claim 1, wherein a feature width of the unique and randomized pattern is in a range of 1 nm to 200 nm.

10. The system of claim 1, wherein a feature width of the unique and randomized pattern is in a range of 10 nm to 50 nm.

11. The system of claim 1, wherein the transfer circuit encodes the unique and randomized pattern onto the strip.

12. The system of claim 11, wherein the unique and randomized pattern is machine-recognizable.

13. The system of claim 1, wherein the unique and randomized pattern is machine-recognizable.

14. The system of claim 1, wherein the unique and randomized pattern includes encoded identification information.

15. The system of claim 1, wherein the unique and randomized pattern includes encoded identification information unique to the pattern that is indistinguishable without the verification circuit.

16. The system of claim 1, wherein randomized structures of the polymer chains create a fingerprint configuration by not using the guiding pattern.

17. The system of claim 1, wherein a metalized pattern is formed for the alternating structure to use as a blocking mask for creating the DSA pattern.

18. An anti-counterfeiting method, comprising:

transferring a Directed Self-Assembly (DSA) pattern including a unique and randomized pattern onto a strip;

embedding the strip on a document; and

verifying that the unique and randomized pattern embedded on the document corresponds to the document,

wherein the DSA is formed b using two different length polymer chains,

wherein an alternating structure aliens end to end by solidifying the two different length polymer chains on a neutral substrate, and

wherein one of the polymer chains is extracted to receive randomly oriented domains by not using a guiding pattern.

19. An anti-counterfeiting method, comprising:

transferring a Directed Self-Assembly (DSA) pattern including a unique and randomized pattern onto a strip;

embedding the strip on a document; and

verifying that the unique and randomized pattern embedded on the document corresponds to the document,

wherein the DSA is formed by using two different length polymer chains,

wherein an alternating structure aligns end to end by solidifying the two different length polymer chains on a neutral substrate, and

wherein one of the polymer chains is extracted to receive randomly oriented domains.