Monolithic ink-jet printhead having a tapered nozzle and method for manufacturing the same
US6886919B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2003 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | Oct 21, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/1437
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A monolithic ink-jet printhead includes a substrate having an ink chamber, a manifold, and an ink channel in flow communication, a nozzle plate including a plurality of passivation layers stacked on the substrate and a heat dissipating layer stacked on the passivation layers, a nozzle for ejecting ink penetrating the nozzle plate, a heater provided between adjacent passivation layers above the ink chamber, and a conductor between adjacent passivation layers, the conductor being electrically connected to the heater, wherein the heat dissipating layer is made of a thermally conductive metal for dissipating heat from the heater, the lower part of the nozzle is formed by penetrating the plurality of passivation layers, and the upper part of the nozzle is formed by penetrating the heat dissipating layer in a tapered shape in which a cross-sectional area thereof decreases gradually toward an exit thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.