Ink jet head
US5734395A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1995 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Sep 11, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/03
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink jet head includes a common electrode formed on a semiconductor substrate. A charge is applied to the common electrode and an electrode disposed on another substrate in opposition to a diaphragm formed in the semiconductor substrate to electrostatically deform the diaphragm and eject ink. The common electrode comprises a single layer or multiple layer metallic coating forming ohmic contact on the semiconductor substrate. In addition, a group III or group V element is doped to a high concentration at the area on the semiconductor substrate where the common electrode is formed. The diaphragm can therefore vibrate at high speed. An ink jet head capable of high speed printing can be provided because supply and elimination of the charge to the diaphragm can be accomplished at high speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.