Article and method of preparing pigments using multiple deposition sources
US6777085B1 · kind B1 · utility
25Cited by
8References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2002 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Aug 4, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2993
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Particles are encapsulated with a layer or sequence of layers. The particles can be flakes and the layers can form an optical interference stack for use as an optically variable pigment, among other purposes. In a particular embodiment a highly reflective metal layer is deposited around a glass flake with specular surfaces. The particles can be produced using a variety of deposition systems. In a particular embodiment, a downstream plasma-enhanced chemical vapor deposition system achieves high deposition rates while avoiding contamination of the plasma source with deposition products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.