Thermal inkjet printhead with increased resistance control and m

Details Thermal inkjet printhead with increased resistance control and m Thermal inkjet printhead with increased resistance control and m

1997-11-21

1999-11-09

Braun, Fred L

Incremental printing of symbolic information

Ink jet

Ejector mechanism

298901, B41J 205

Patent

active

059800259

ABSTRACT:
A thermal ink jet printhead is improved by providing a heater resistor which is mechanically isolated from overlying nitride and tantalum layers by growing a thin buffer oxide layer on the surface of the resistor heater layer. The introduction of the buffer oxide layer permits a thinner nitride layer which, in turn, reduces electrical resistance changes which would otherwise be introduced into the resistor arrays by mechanical stress after the nitride layer is deposited.

REFERENCES:
patent: Re32572 (1988-01-01), Hawkins et al.
patent: 4532530 (1985-07-01), Hawkins
patent: 4774530 (1988-09-01), Hawkins
patent: 4935752 (1990-06-01), Hawkins
patent: 4951063 (1990-08-01), Hawkins et al.
patent: 5636441 (1997-06-01), Meyer et al.
patent: 5742307 (1998-04-01), Watrobski et al.

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