Patent ID: 8399264
Filing Date: 2013-03-19
Classification: G06T,H01L,H05K

Abstract:
1. A method of alignment detection comprising: fluorescing a dielectric material layer on a substrate, wherein the substrate has at least one contact land, the dielectric material layer overlying at least a portion of the contact land, and at least one via defined in the dielectric material layer exposing at least a portion of the contact land; and determining the position of the via relative to the contact land from the fluoresced dielectric material layer, comprising receiving light from the fluoresced dielectric material layer with a light receiving device, wherein the light receiving device is coupled to an image processing device for determining the position of the via relative to the contact land, and segregating the received light from the fluoresced dielectric material layer using a green color gray scale and using differentials in the green color gray scale to determine the origins of the via and the contact land.