Ink-jet printer head and manufacturing method thereof
US6350017B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 2000 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Aug 10, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/1646
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Each of heating elements comprises a heating resistor, and a pair of a common electrode and an individual electrode formed on ends of said heating resistor so that a heating area of the heating resistor is exposed. A barrier layer covers the electrodes so that the electrodes are not exposed to the ink in the ink flow passage, that is, not only upper surface of the electrodes, but also edges thereof are covered with the barrier layer. The barrier layer is made of, for example, single atomic metal such as Ta and Ti, oxide, corrosion resistant amorphous alloy, titanium nitride, titanium-tungsten, or the like. The barrier layer has the thickness of 10 to 1,000 nm, and is made by electroless plating or the like. The barrier layer is effective in preventing not only corrosion but also migration as contact surface corrosion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.