Process for coating a substrate with polyimide
US4467000A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1983 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Mar 29, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31721
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for coating a substrate to provide good planarization and good mechanical and thermal stability, the process comprising applying to the substrate an amino-terminated oligomer and an ester, with the oligomer being formed from an aromatic diamine and from an aromatic dianhydride, and the ester being formed from an aromatic tetracarboxylic acid and an alcohol, and by reacting said oligomer and said ester in situ, with the process being characterized in that the ester reacts with an amine group of the oligomer to form a high molecular weight polyamide at a temperature between 40.degree. C. and 140.degree. C., and continues to react to form a cyclic imide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.