Printable molecular ink
US11873409B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Feb 8, 2018 |
| Grant date | Jan 16, 2024 |
| Priority date | — |
| Expiry date | Jan 5, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/1131
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A molecular ink contains a silver carboxylate, an organic amine compound, an organic polymer binder, a surface tension modifier, and a solvent. The ink may be used to produce conductive silver traces on a substrate for use in fabricating electronic devices. The ink is particularly useful for producing conductive silver traces on a shapeable (e.g. stretchable) substrate in a low temperature sintering process. Also, a process for producing a conductive silver trace on a shaped substrate involves depositing the molecular ink on a shapeable substrate, drying the ink on the shapeable substrate to form a non-conductive trace containing the silver carboxylate on the shapeable substrate, forming the shapeable substrate into a shape to produce a shaped substrate so that at least a portion of the non-conductive trace is situated on a shaped portion of the shaped substrate, and sintering the shaped substrate to decompose the silver carboxylate to metallic silver thereby producing a conductive silver trace on at least the shaped portion of the shaped substrate. The process reduces potential for cracking of conductive silver traces on shaped substrates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.