Copolyimide exhibiting specific photosensitivity and birefringence
US5449742A · kind A · utility
15Cited by
6References
6Claims
0Family size
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Key dates
| Filing date | Feb 15, 1994 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Feb 15, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/045
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyimide optical waveguide structures comprising a core within a cladding wherein at least one of the core and the cladding is a polyimide containing 6FDA, BTDA, an aromatic diamine having bulky methyl groups ortho to the amine, and a co-diamine wherein the polyimides have the properties of low optical loss, low optical absorbance, controllable refractive index, and high thermal stability, and wherein the polyimides are photosensitive and solvent resistant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.