Polyimide copolymers containing 4,4'-bis(p-aminophenoxy)biphenyl and siloxane diamine moieties
US4975331A · kind A · utility
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4References
4Claims
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Key dates
| Filing date | May 24, 1990 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | May 24, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31721
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A low modulus, solvent resistant, wet etchable polyimide useful in electronic applications as passivation and insulating coatings, said polyimides containing a 4,4'-bis(p-aminophenoxy)biphenyl moiety, a siloxane diamine moiety, and a dianhydride moiety.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.