A method, apparatus, and computer program product for implementing
inspection recipe services are provided. The apparatus includes a test
structure including a semiconductor substrate and a number of arrays
disposed on the semiconductor substrate. The arrays are linearly arranged
and spaced equidistant. Each of the arrays corresponds to a reticle field
and includes a number of cells. The test structure also includes a defect
programmed into every third array. The defect is programmed in the same
location on each third array. The test structure further includes an
alignment site defined on the test structure for providing a point of
reference upon inspection. The alignment site, in conjunction with a
modified reticle pitch extending the distance of one reticle field plus a
portion of an adjacent reticle field, are used to perform a random mode
inspection of selected arrays in the test structure.