Patent ID: 8294229

Claim:
A wafer-scale array of optical packages, comprising: at least one wafer-scale array of lens structures, including a wafer-scale array of first barrel structures and a wafer-scale array of lenses directly formed on the wafer-scale array of first barrel structures such that the wafer-scale array of lenses is integrally combined with the wafer-scale array of first barrel structures, the wafer-scale array of first barrel structures being made of a material different from a material of the wafer-scale array of lenses; and at least one wafer-scale array of second barrel structures stacked on and combined with the at least one wafer-scale array of lens structures, wherein the wafer-scale array of first barrel structures has a surface condition that resistance to flow of the material of the wafer-scale array of lenses in a liquid state varies according to position, the surface condition of the wafer-scale array of first barrel structures is such that the resistance is smaller at a near position than at a distant position, the near position being nearer to the wafer-scale array of lenses than the distant position, and the wafer-scale array of first barrel structures has a height difference on a surface thereof, wherein the height difference is higher at the near position than at the distant position.