Apparatus for transmission optical measurements with a window in an opaque substrate
US12203840B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2021 |
| Grant date | Jan 21, 2025 |
| Priority date | — |
| Expiry date | Feb 21, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/1452
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of producing a microfluidic chip for use in flow cytometry, the method comprising the steps of providing an opaque substrate, a first surface of which is optically smooth for visible light providing a continuous transparent layer across said first surface by vapour deposition so as to provide conformal contact between the continuous transparent layer and the first surface of the substrate providing a flow channel bounded on a first side by the continuous transparent layer and etching an aperture in a second surface of the substrate extending to the first surface of the substrate so as to provide an optical path between said second surface and the flow channel wherein the continuous transparent layer is less reactive to the etching than the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.