Ink jet printhead with conformally coated heater
US6719406B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2002 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Nov 23, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is disclosed an ink jet printhead which comprises a plurality of nozzles and one or more heater elements corresponding to each nozzle. Each heater element is configured to heat a bubble forming liquid in the printhead to a temperature above its boiling point to form a gas bubble therein. The generation of the bubble causes the ejection of a drop of an ejectable liquid (such as ink) through the respective corresponding nozzle, to effect printing. Each heater element is substantially covered by a conformal protective coating which has been applied to all sides of the heater element simultaneously so that the coating is seamless.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.