Thick polyimide film having improved surface quality and method of manufacturing same
US11945922B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Nov 22, 2018 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Sep 3, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2479/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a polyimide film in which a parameter A for the relationship of the viscosity (V) of a polyamic acid solution, the number average molecular weight (Mn) of polyamic acid, and the thickness (T) of a polyimide film falls within a range from 0.4 to 1.13.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.