Grid array inspection system and method

摘要

An inspection apparatus and method is provided for inspecting external lead connectors in a grid array of an electronic package. The inspection apparatus includes a plurality of reflecting devices for directing a plurality of different oblique images to a partially reflective beam splitter, wherein each of the plurality of images corresponds to a different perspective view of the grid array. The apparatus is further configured such that each of the plurality of images share a single, common X,Y coordinate system for describing point locations within each image. An image capturing device captures each oblique image from the beam splitter. By comparing the relative location of image points in at least two captured images, the spatial coordinates and physical parameters of each solder ball may be calculated. The calculated values are converted to absolute values and compared against predetermined values for determining whether the electronic package meets manufacturing standards.