Patent ID: 8042913

Claim:
A fluid ejection device, comprising: a substrate having a fluid channel including a fluid plenum and a fluid ejection chamber communicated with the fluid plenum; a fluid supply passage communicated with the fluid plenum of the fluid channel; a flexible membrane supported by the substrate and extended a length of the fluid channel, wherein the flexible membrane includes a first portion extended over the fluid ejection chamber and a second portion extended over the fluid plenum; an actuator provided on the first portion of the flexible membrane, wherein the actuator is adapted to deflect the first portion of the flexible membrane relative to the fluid channel; and a reinforcement member provided on the second portion of the flexible membrane, wherein the reinforcement member supports the second portion of the flexible membrane, has a first end positioned on the second portion of the flexible membrane, has a second end extended beyond the flexible membrane, and defines a boundary of the fluid supply passage.