Thermal inkjet printhead having a preferred nucleation site

Details Thermal inkjet printhead having a preferred nucleation site Thermal inkjet printhead having a preferred nucleation site

1994-03-23

2000-06-06

Hartary, Joseph

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 62, B41J 205

Patent

active

060709693

ABSTRACT:
A preferred nucleation site is established in an ink firing chamber for a thermal inkjet printhead. The cavitation barrier layer of the resistance heater substrate is created with particular surface discontinuities and a temperature profile which favor heterogeneous bubble nucleation in a predetermined area. The predetermined area is located essentially along the axis of the ink droplet expulsion orifice.

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