Molecular inks
US10883011B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 19, 2015 |
| Grant date | Jan 5, 2021 |
| Priority date | — |
| Expiry date | Jun 19, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/1136
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A flake-less molecular ink suitable for printing (e.g. screen printing) conductive traces on a substrate has 30-60 wt % of a C8-C12 silver carboxylate or 5-75 wt % of bis(2-ethyl-1-hexylamine) copper (II) formate, bis(octylamine) copper (II) formate or tris(octylamine) copper (II) formate, 0.1-10 wt % of a polymeric binder (e.g. ethyl cellulose) and balance of at least one organic solvent. Conductive traces formed with the molecular ink are thinner, have lower resistivity, have greater adhesion to a substrate than metal flake inks, have better print resolution and are up to 8 times less rough than metal flake inks. In addition, the shear force required to remove light emitting diodes bonded to the traces using Loctite 3880 is at least 1.3 times stronger than for commercially available flake-based inks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.