Patent ID: 8118406

Claim:
A fluid ejection assembly for ejecting at least one fluid, the fluid ejection assembly comprising: a fluid ejection device including an array of drop ejectors with a corresponding fluid inlet; and an injection-molded mounting substrate for the fluid ejection device, wherein the injection-molded mounting substrate includes: a housing portion including a recess, the housing portion having been formed by a first shot molding; and a die-attach portion formed within the recess of the housing portion by a second shot molding, the die-attach portion including a passageway disposed along a passageway direction, the passageway being fluidly coupled to the fluid inlet of the fluid ejection device, wherein the die attach portion is made of a material having a coefficient of thermal expansion that is less than 10 parts per million per degree C. along a direction parallel to the passageway direction, and is greater than 10 parts per million per degree C. along a direction perpendicular to the passageway direction.