Integrated thermal ink jet printhead and method of manufacture
US4847630A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1987 |
| Grant date | Jul 11, 1989 |
| Priority date | — |
| Expiry date | Dec 17, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/3428
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
We describe an integrated thermal ink jet printhead and manufacturing process therefor which includes the successive build-up of an orifice plate, a first barrier layer, heater resistors, a second barrier layer, and an ink reservoir-defining layer on top of a reusable or "dummy" substrate. Lead-in conductors are formed integral with the heater resistors by controlling the cross-sectional areas of these components, and openings (passageways) are formed between ink reservoirs and the orifice plate to provide for ink flow under control of the heater resistors. The dummy substrate is stripped away from the adjacent orifice plate, and the ink reservoir defining layer may be secured to an ink supply tank which supplies ink to the individual ink reservoirs. Thus, the orifice plate, heater resistors and ink flow paths of the printhead are self aligned, and the heater resistors are removed from direct cavitational forces from ink ejected from the orifice plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.