Process for production of chain metal powders, chain metal powders produced thereby, and anisotropic conductive film formed using the powders
US7850760B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2005 |
| Grant date | Dec 14, 2010 |
| Priority date | — |
| Expiry date | Apr 11, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/256
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A chain metal powder, which is free from branches and has a small distribution of the chain length, can be produced by a process of reducing metal ions contained in an aqueous solution, while applying a magnetic field to the solution containing ferromagnetic ions, in the presence of a polymer compound comprising repeating units of the formula (1):and repeating unit of the formula (2):or repeating unit of the formula (4); ora process which comprises the steps of reducing metal ions contained in an aqueous solution, while applying a magnetic filed to the solution, in the presence of both a reducing agent capable of generating a gas during the reduction of metal ions and a foamable water soluble compound, through the generation of a gas, a bubble layer on the surface of the aqueous solution to form a chain metal powder, separating the bubble layer formed on the surface of the aqueous solution from the solution, and collecting the chain metal powder contained in the bubble layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.