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1. US20040222014 - Microelectronic security coatings

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Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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Claims
1. A method of coating a circuit comprising:
applying a first material as a mesh on the circuit; and
applying a coating material over the mesh.
2. The method described in claim 1, wherein the mesh is a sheet of said material.
3. The method described in claim 1, wherein the mesh comprises a signature pattern.
4. The method described in claim 1, further comprising inserting an abrasive material into a space in the mesh.
5. The method described in claim 1, further comprising:
inserting a sensor component in a space in the mesh material, said component comprising means for providing a signal to the circuit when the component is disturbed.
6. The method described in claim 1 wherein the mesh material comprises UV-fluorescent materials.
7. The method described in claim 1, wherein the mesh material comprises emissive materials.
8. The method described in claim 1 wherein the mesh comprises a material that attenuates electromagnetic energy.
9. The circuit described in claim 1 wherein the mesh comprises strands of different materials.
10. The method described in claim 2, wherein the mesh provides a signature pattern.
11. The method described in claim 2, further comprising inserting an abrasive material into a space in the mesh.
12. The method described in claim 2, further comprising inserting a sensor component in a space in the mesh material, said component comprising means for providing a signal to the circuit when the component is disturbed.
13. The method described in claim 3, further comprising inserting a hard, abrasive material into a space in the mesh.
14. The method described in claim 3, wherein a sensor component is inserted into at least some of the mesh material, said component comprising means for providing a signal to circuit when disturbed.
15. A method for determining if a circuit has been tampered with comprising:
applying a first coating to the circuit in a signature pattern;
applying a second coating over the first coating;
producing an image of the first coating; and
examining the image for the characteristics of the signature pattern.
16. The method of claim 15, wherein the first coating comprises a mesh.
17. The method of claim 16, where the mesh comprises a material that produces energy and said image is produced from said energy.
18. The method of claim 15, further comprising applying energy to the circuit to produce said image.
19. The method described in claim 15, wherein mesh strands comprise different materials to produce a change in the image of the mesh.
20. A method for determining if a circuit has been tampered with comprising:
applying a mesh in a pattern as the final topcoat to the circuit in a signature pattern, said pattern defining a signature; and
producing an image of the mesh pattern and comparing it with said signature, any differences indicating that the mesh has been disturbed.
21. A combination comprising:
a circuit;
a mesh coating over the circuit; and
an abrasive material in a space in the mesh.
22. A combination comprising:
a circuit;
a mesh coating over the circuit; and
an electrical component in a space in the mesh to provide a signal to the circuit when the component is disturbed.
23. A combination comprising:
a circuit; and
a mesh coating over the circuit comprising an energy emitting material.
24. A combination comprising:
a circuit;
a mesh coating over the circuit comprising an energy absorbing material.
25. A combination comprising:
a circuit;
a mesh coating over the circuit that has a signature pattern.
26. The combination of claim 25, wherein the mesh coating comprises an energy absorbing material.
27. The combination of claim 25, wherein the mesh coating comprises an energy emitting material.
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