Patent ID: 8840227
Filing Date: 2014-09-23
Classification: B41J

Abstract:
1. An inkjet printhead comprising a plurality of nozzle chambers disposed on a substrate and a bi-layered nozzle plate having a plurality of nozzle apertures defined therein, said bi-layered nozzle plate being comprised of: a lower first nozzle plate comprised of a first material; and an upper second nozzle plate disposed on said first nozzle plate, said second nozzle plate being comprised of a second material, wherein: said first and second materials are different from each other and are each independently selected from the group consisting of: silicon nitride, silicon oxide and silicon oxynitride; each nozzle chamber comprises a roof spaced apart from said substrate; each roof is defined by part of said bi-layered nozzle plate; each nozzle chamber comprises sidewalls extending between said roof and said substrate; and said first nozzle plate and said sidewalls are comprised of the same material.