Process for protectively coating hydraulic microcircuits against aggressive liquids, particulary for an ink jet printhead
US8109614B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2007 |
| Grant date | Feb 7, 2012 |
| Priority date | — |
| Expiry date | Dec 6, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/164
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink jet printhead, made of a silicon substrate and a plurality of metallic and dielectric layers deposited on said substrate. A plurality of chambers for ejection of ink droplets and a plurality of corresponding feeding ducts, connected to the chambers, are produced in a structural layer made of non-photosensitive epoxy or polyamide resin. The chambers and said ducts are delimited by at least one upper wall, the upper wall communicating with at least one nozzle for ejection of the ink droplets. The upper wall and an inner wall of the nozzle are coated with at least one metallic coating layer, suitable for increasing the resistance of the walls to chemically aggressive liquids, in contact with the walls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.