Testing of structures on surfaces of electrical modules - has structures scanned and tested for observance of salient factors, e.g. spacing, angles, straightness

摘要

The structure testing method is applicable to structures on surfaces of electrical modules or to auxiliary means for production of the subassemblies. The existing actual structure is scanned and intermediately stored. The structure so obtained is tested for observance of specified constructional rules relating to the structure building, such as syntactic connection between adjacent picture elements. Deviations from the rules indicating structure faults are detected. A practical example is afforded by a mask structure consisting of black regions, in front of a white background. The factors to be tested are accuracy of corner angles, straightness of edges and min. separation of the black regions which can be isolated from each other or interdependent.