Ink jet recording head and producing method therefor
US7380915B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 2005 |
| Grant date | Jun 3, 2008 |
| Priority date | — |
| Expiry date | Nov 17, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/1603
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In an ink jet recording head of an excellent discharge ability and a producing method therefor, a lateral wall of an ink supply aperture is covered with a minimum necessary ink-resistant protective film. The ink supply aperture is formed by etching an exposed portion of the substrate, coating the etched portion of the substrate, and alternately repeating the etching and the coating until the etched portion becomes connected with a liquid flow path, and, for a depth a of a recessed portion and for a distance b of adjacent projecting portions, when the depth a is in a range of 1 μm or less and the distance b is in a range of 5 μm or less, a and b satisfy a relation b/a≧1.7.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.