Method of forming an inkjet printhead with channels connecting trench and firing chambers
US5755032A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1995 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Oct 30, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49401
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method to eliminate ink trajectory errors when an inkjet printhead is fabricated is disclosed. In a preferred embodiment, a nozzle member containing an array of orifices is affixed to a barrier layer formed on a having heater elements formed thereon. The nozzle member is affixed to the barrier layer using heat and pressure. The back surface of the nozzle member extends beyond the outer edges of the substrate. During the heating and pressure step used to affix the nozzle member to the barrier layer, the nozzle member tends to undesirably bend over the outer edges of the barrier layer, causing the nozzles to be tilted outward. To avoid the foregoing the barrier layer is formed with one or more trenches parallel to the long edges of the barrier layer to cause the nozzle member to dip and bend over the trenches in an amount approximately equal to the bend into the ink channels on the outer edge of the substrate. The nozzles are located at the crest of the bent nozzle member and, thus, remain normal to the surface of the printhead. The trenches are in fluidic communication with all ink ejection chambers via the rear channels and trenches which may extend the entire length of the barri…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.