ALIGN Application - Integrated Circuit Alignment
ALIGN is a pattern search algorithm that uses a two dimensional (2D) gray
scale subimage to characterize a target that is to be found in subsequent
images. ALIGN is used to track objects in images (e.g., following blood
cells in a microscopic slide), find reference marks (e.g., in finding
patterns on integrated circuits (IC) for use in assembling ICs into
packaged parts, or in registering images for a multicolor photographic
printing application). In the application shown, two different corners of
an IC are being shown to the ALIGN software. ALIGN memorized characteristic
features of the two corners for later usage. In this application, ALIGN
will be used to find corners of subsequently presented ICs. This
information will be used to direct a robotic manipulator to the correct
position and orientation for picking up the IC and installing it into a
larger packaged assembly.
ALIGN has also been used in applications such as optical character
verification, printing pattern verification, wire bonding, pick and place
robotics, and quilt manufacturing.
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