Corrosion resistant thermal ink jet print cartridge and method of manufacturing same
US6331044A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1999 |
| Grant date | Dec 18, 2001 |
| Priority date | — |
| Expiry date | Oct 27, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/1646
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thin film structure is fabricated using photolithographic techniques and includes a plurality of substrates defining a resistor film, a conductor film and a passivation layer. The resistor film is etched to provide a plurality of individual heaters. The conductor film is etched to provide a plurality of conductive traces. At least one passivation layer covers the conductor film. A plurality of electrical contact pads are also formed that extend through etched holes in the passivation layer so that the electrical contact pads make electrical contact with the conductive traces. A nozzle plate is attached to the thin film structure. The nozzle plate has a plurality of individual nozzle orifices and also defines a plurality of corresponding ejection cavities for receiving ink from an ink reservoir via capillary action. The ejection cavities are each aligned with a corresponding one of the heaters for thermally ejecting ink through the orifices onto an adjacent print medium, The thin film structure and the attached nozzle plate are mounted to a housing that includes the ink reservoir. A mixture of a volatile liquid carrier and at least one corrosion inhibitor is sprayed onto the porti…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.