Multilayered structures and uses thereof in security markings
US11194094B2 · kind B2 · utility
1Cited by
20References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2019 |
| Grant date | Dec 7, 2021 |
| Priority date | — |
| Expiry date | Jun 14, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3278
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A security marking has a physically unclonable function (PUF) wherein the PUF includes a disordered multilayer photonic crystal structure having an electromagnetic transmission and/or reflection spectrum and/or spectra upon receipt of electromagnetic radiation within a photonic bandgap region of the structure that is unique to the structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.