Conductive materials with electrical stability and good impact resistance for use in electronics devices
US7108806B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2003 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Sep 2, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/124
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition that comprises a) an admixing of at least one epoxy resin and aliphatic amine wherein the ratio of epoxy function group/amine is greater than 1; b) a conductive filler; c) one or more corrosion inhibitors, oxygen scavengers or both; d) imidazole as a curing agent/catalyst; and e) optionally other additives such as organic solvents, flow additives, adhesion promoters and rheology modifiers. The reaction of epoxy and aliphatic amine with excess epoxy functionality results in a flexible resin with remaining active epoxy groups. The compositions exhibit improved electrical stability and impact resistance over other conductive adhesive compositions that do not comprise the admixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.