Method for printing colour images
US10025197B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2015 |
| Grant date | Jul 17, 2018 |
| Priority date | — |
| Expiry date | Dec 18, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/70558
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method forms a pattern of metallic nanofeatures that generates by plasmonic resonance a desired image having a distribution of colors. The method includes providing a substrate having a layer of photosensitive material, exposing the layer to a high-resolution periodic pattern of dose distribution, and determining a low-resolution pattern of dose distribution such that the sum of the low-resolution pattern and the high-resolution periodic pattern of dose distribution is suitable for forming the pattern of metallic nanofeatures. The lateral dimensions of the metallic nano-features have a spatial variation across the pattern that corresponds to the distribution of colors in the desired image. The layer of photosensitive material is exposed to the low-resolution pattern of dose distribution. The layer of photosensitive material is developed to produce a pattern of nanostructures in the developed photosensitive material. The pattern of nanostructures is processed so that the pattern of metallic nanofeatures is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.