Ink jet printhead
US6412921B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2000 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Dec 29, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/1632
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink jet printhead optimally utilizes the surface area of the upper face of a silicon die, even in the case of a non-monochromatic head having plural ink tanks. For each tank of ink, the ink includes one pass-through slot that departs from the lower face of the silicon die and terminates in a wider trench in the upper face. The pass-through slot is made using a chemical etching type incision technique known as “inductively coupled plasma” (ICP), thus maximizing the distance between the different ink tanks and, simultaneously, minimizing the distance between the different groups of nozzles on the upper face of the die. Accordingly, the risk of the silicon substrate breaking during any of the various stages of manufacture is considerably reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.