Environmentally stable integrated optic chip mount
US5028106A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 1990 |
| Grant date | Jul 2, 1991 |
| Priority date | — |
| Expiry date | Sep 24, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/122
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A wedge-shaped block of pyrolytic graphite or other suitable anisotropic material cut along certain predetermined angular dimensions is used as a thermal expansion coefficient transformer to match the anisotropic thermal expansion coefficients of a lithium niobate or lithium tantalate IO chip to an isotropic substrate material such as 316 stainless steel or aluminum, or to match the isotropic thermal expansion coefficients of a silicon IO chip to an isotropic substrate material, the wedge being used as an intermediate block mounted between the IO chip and the substrate, the anisotropic material used as the thermal transformer having a thermal expansion coefficient which is greater than the value of the thermal expansion coefficient of the IO chip material in one direction, and having a thermal expansion coefficient which is lesser than the thermal expansion coefficient of the IO chip material in another direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.