Patent ID: 9707761
Date: 2017-07-18
CPC Classifications: B41J,Y10T

Claim:
1. A process for forming a nozzle plate for a fluid-ejection device, the process comprising: forming a structural layer over a first side of a first substrate of semiconductor material, the structural layer having a respective first side and second side, the second side of the structural layer facing the first side of the first substrate; forming a first through hole in the structural layer by removing a portion of the structural layer, said first through hole having sidewalls that extend between an inlet section at the first side of the structural layer and an outlet section at the second side of the structural layer; depositing a narrowing element on the sidewalls of the first through hole; tapering the narrowing element so that the inlet section of the first through hole has an area larger than a respective area of the outlet section of the first through hole by anisotropically etching the narrowing element, wherein the tapered narrowing element has a constant thickness; and removing the first substrate.