Fluidic devices with diaphragm valves
US8388908B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2010 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Jul 12, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/2575
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention provides fluidic devices, in particular microfluidic devices, with diaphragm valves having low failure rates. Low failure rates are achieved by inhibiting sticking of the diaphragm to functional surfaces such as valve seats, valve chamber and fluidic channels and conduits. One way to implement this is to provide exposed surfaces facing the diaphragm, particularly valve seats, with a low energy material, such as a noble metal, a perfluorinated polymer, a self-assembled monolayer, hard diamond, diamond-like carbon or a metal oxide. In other embodiments, the valves are provided with ridges and the diaphragm is adhered to the fluidic or actuation layer with an adhesive material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.