Ink jet printhead with heater chip ink filter
US6260957A · kind A · utility
22Cited by
13References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1999 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Dec 20, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/14403
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A silicon ink filter for a heater chip of an ink jet printhead is formed by micromachining and laser drilling. The heater chip may contain a plurality of such filters for the plurality of nozzles of the printhead. The filter comprises a via constituting an ink entrance area formed by micromachining and a plurality of bores formed at the exit side of the via produced by laser drilling. Protective layers are preferably disposed over the heater chip substrate prior to micromachining and laser drilling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.