Process for producing three-dimensional polyimide optical waveguide
US7085469B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2003 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | Dec 15, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/1221
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention provides a process for producing a three-dimensional polyimide optical waveguide, which comprises: (I) irradiating a polyamic acid film with a laser beam while converging the laser beam at an inside portion of the film and relatively moving the light convergence point, the polyamic acid film containing: (a) a polyamic acid obtained from a tetracarboxylic dianhydride and a diamine; and (b) per 100 parts of the polyamic acid, from 0.5 part by weight to less than 10 parts by weight of a specific 1,4-dihydropyridine derivative represented by formula (I):and then, (II) heating the polyamic acid film to imidize the polyamic acid, thereby obtaining an optical waveguide having a continuous core region where the refraction index has been changed, in the thus formed polyimide film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.