Patent ID: 7695112

Claim:
A fluid ejection device, comprising: a substrate; a barrier layer formed on the substrate; and an orifice layer extended over the barrier layer, wherein the barrier layer includes a chamber and first and second fluid channels each communicated with the chamber, wherein the first and second fluid channels each have a first portion and a second portion, and wherein a width of the first portion of the first fluid channel is substantially constant and a width of the first portion of the second fluid channel is substantially constant, wherein the barrier layer has a thickness in a range of approximately 12 microns to approximately 16 microns, wherein the first and second fluid channels have a combined minimum width in a range of approximately 34 microns to approximately 42 microns and each have a minimum length in a range of approximately 29 microns to approximately 31 microns, and wherein the second portion of the first fluid channel is oriented at an angle to the chamber in a range of approximately 43 degrees to approximately 46 degrees and the second portion of the second fluid channel is oriented at an angle to the chamber in a range of approximately 30 degrees to approximately 34 degrees.