Heat sink for a planar waveguide substrate
US6847748B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2003 |
| Grant date | Jan 25, 2005 |
| Priority date | — |
| Expiry date | Sep 24, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4201
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A recessed area formed on a substrate surface is filled with heat sink material to form a heat sink. The heat sink material has thermal conductivity greater than that of the substrate. The heat sink may have a substantially flat surface substantially flush with the substrate surface. The substrate may further include: a planar optical waveguide formed thereon positioned for optical coupling with an optical device mounted on the substrate in thermal contact with the heat sink; and/or an electrical contact layer formed thereon positioned for establishing electrical continuity with an optical device mounted on the substrate in thermal contact with the heat sink. The electrical contact may also provide thermal contact between the device and heat sink. The substrate may further include a low-index optical buffer layer formed on its surface. Materials for the substrate, buffer layer, and heat sink may include silicon, silica, and diamond, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.