Labeling and authenticating using a microtag
US9798903B2 · kind B2 · utility
2Cited by
0References
14Claims
0Family size
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Key dates
| Filing date | Oct 19, 2016 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Oct 19, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/06159
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An identifier made using a silicon film. The silicon film has a varying optical index of refraction. The varying optical index of refraction reflects one or more spectral peaks when illuminated with light. The one or more spectral peaks includes a reference peak. The silicon film is fragmented and then oxidized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.