Printhead with field oxide as thermal barrier in chip

Details Printhead with field oxide as thermal barrier in chip Printhead with field oxide as thermal barrier in chip

1995-10-19

1998-06-30

Sterrett, Jeffrey L.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 63, B41J 205

Patent

active

057741484

ABSTRACT:
In an active ink jet printhead chip (13) a layer of boron-phosphorus doped silicate glass (BPSG) immediately underneath the heaters followed by a silicon dioxide layer. This insulates the substrate during the fire pulse of its heater, yet allows thermal energy to diffuse into the silicon during the time between firing pulses.

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patent: 5534069 (1996-07-01), Kuwabara et al.
patent: 5635966 (1997-06-01), Keefe et al.
patent: 5639386 (1997-06-01), Burke et al.

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