Copolyimide exhibiting specific photosensitivity and birefringen

Details Copolyimide exhibiting specific photosensitivity and birefringen Copolyimide exhibiting specific photosensitivity and birefringen

1994-02-15

1995-09-12

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528128, 528170, 528171, 528172, 528173, 528174, 528179, 528185, 528188, 528220, 528229, 528342, 528350, C08G 7310, C08G 6926

Patent

active

054497426

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.

REFERENCES:
patent: 4595548 (1986-06-01), St. Clair et al.
patent: 4603061 (1986-07-01), St. Clair et al.
patent: 4657832 (1987-04-01), Pfeifer
patent: 4705540 (1987-11-01), Hayes
patent: 4717393 (1988-01-01), Hayes
patent: 4912197 (1990-03-01), Hayes
Database WPI, JP 4 328 127, Apr. 26, 1991 (2 pages) Pub. Nov. 17, 1992.

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