Radiation-curable composition, optical waveguide and method for formation thereof
US7162131B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2003 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | Nov 5, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/0382
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A radiation-curable composition containing (A) hydrolyzates of hydrolyzable silane compounds represented by general formula (1): (R1)p(R2)qSi(X)4-p-q (wherein R1 is a non-hydrolyzable organic group having 1 to 12 carbon atoms that contains fluorine atoms, R2 is a non-hydrolyzable organic group having 1 to 12 carbon atoms (but excluding ones that contain fluorine atoms), X is a hydrolyzable group, p is an integer of 1 or 2, and q is an integer of 0 or 1) and condensates of such hydrolyzates, and (B) a photo acid generator, wherein the ratio of silanol (Si—OH) groups in the composition is 0.1 to 0.5 out of all the bonding groups on Si. With such a composition, the waveguide loss is low for light having a wavelength in a broad range from the visible region to the near infrared region, and moreover the cracking resistance, the patterning ability upon irradiation with radiation, and so on are excellent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.