Patent ID: 7836600
Filing Date: 2010-11-23
Classification: B41J,Y10T

Abstract:
1. A method of forming a fluid ejector comprising: providing a substrate having a surface; depositing a first material layer on the surface of the substrate, the first material layer being differentially etchable with respect to the substrate; defining a fluid chamber boundary region by removing a portion of the first material layer thereby forming a patterned first material layer that includes a region exposing the surface of the substrate; after forming the patterned first material layer, depositing a sacrificial material layer over the patterned first material layer; further defining the fluid chamber boundary location by removing a portion of the sacrificial material layer deposited over the patterned first material layer thereby forming a patterned sacrificial material layer that includes a region of sacrificial material that is in contact with the surface of the substrate; depositing at least one additional material layer over the patterned sacrificial material layer; after depositing the at least one additional material layer, etching a hole through the at least one additional material layer, said hole terminating at the region of the sacrificial material layer that is in contact with the surface of the substrate within the fluid chamber boundary location; after etching the hole, removing the sacrificial material layer in the region of the sacrificial material layer that is in contact with the surface of the substrate within the fluid chamber boundary location by introducing a first etchant through the hole; forming the fluid chamber by introducing a second etchant through the hole to etch substrate material within the fluid chamber boundary location that was exposed after removing the sacrificial material layer; and forming a source of fluid impedance.