Printhead stress relief

Details Printhead stress relief Printhead stress relief

1997-12-15

2000-08-22

Barlow, John

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 44, B41J 2015, B41J 2135

Patent

active

061060968

ABSTRACT:
The invention described in the specification relates to an ink jet printhead structure having semiconductor substrate containing energy imparting devices for ejecting ink through nozzle holes in a nozzle plate, to a method for making a printhead structure and to a printer cartridge containing the printhead structure. In order to reduce stresses induced in the structure during manufacturing and/or use thereof, a polymeric layer is disposed between the semiconductor substrate and nozzle plate which contains expansion void spaces or valleys sufficient to inhibit stresses in the structure during a process for bonding the nozzle plate to the polymeric layer thereby reducing misalignment and warpage problems associated with conventional printhead structures.

REFERENCES:
patent: 4994825 (1991-02-01), Saito et al.
patent: 5847725 (1998-12-01), Cleland et al.

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