Patent ID: 8359748
Filing Date: 2013-01-29
Classification: B41J,Y10T

Abstract:
1. A method of forming a fluid ejector comprising: forming a recess well into a bulk silicon wafer on a first side of the bulk silicon wafer; filing in the recess well with a sacrificial material; depositing a thin layer structure onto the first side of the bulk silicon wafer covering the filled in recess well; bonding or depositing a thin film piezoelectric to the thin layer structure; forming a hole in the thin layer structure exposing at least a portion of the sacrificial material; removing the sacrificial material from the recess well, wherein the hole in the thin layer structure and the recess well with the removed sacrificial material, form a fluid inlet; forming an opening area in the bulk silicon wafer, from a second side of the bulk silicon wafer; forming a nozzle plate having a recessed portion and an aperture within the recessed portion; and attaching the nozzle plate to the second side of the bulk silicon wafer, with the recessed portion positioned within the opening area, the thin layer structure and the recessed portion of the nozzle plate defining a depth of a fluid cavity defined by the thin layer structure, the recessed portion of the nozzle plate and the sidewalls of the bulk silicon wafer.