Copper nanocrystals and methods of producing same
US6887297B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2002 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | Nov 8, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2999/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to methods of making monodisperse nanocrystals comprising the steps of reducing a copper salt with a reducing agent, providing a passivating agent comprising a nitrogen and/or an oxygen donating moitey and isolating the copper nanocrystals. Moreover, the invention relates to methods for making a copper film comprising the steps of applying a solvent comprising copper nanocrystals onto a substrate and heating the substrate to form a film of continuous bulk copper from said nanocrystals. Finally, the invention also relates to methods for filling a feature on a substrate with copper comprising the steps of applying a solvent comprising copper nanocrystals onto the featured substrate and heating the substrate to fill the feature by forming continuous bulk copper in the feature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.