Printhead with unpassivated heater resistors having increased resistance
US5682188A · kind A · utility
24Cited by
10References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1995 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Mar 16, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/03
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermal inkjet printhead includes unpassivated heater resistors whose resistive material is doped, preferably with oxygen, nitrogen or an equivalent dopant, for increasing the resistance of the material. By increasing the resistance of the resistive material through doping, the drive currents for generating heat within the resistors need not be changed from levels which inkjet printers are presently designed to work with. The printhead of the invention can thus be used in place of a standard printhead without modification to the printer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.