A system and method is disclosed for testing integrated circuits that
contain memory devices. A plurality of test circuits is created in which
each test circuit incorporates a physical fault in a memory bit cell.
Each of the test circuits generates a distinct electrical signature that
is due to presence of the physical fault in the test circuit. The
electrical signatures from the test circuits are compared with a signal
from an integrated circuit memory device to determine whether any of the
physical faults in the test circuits are present in the integrated
circuit memory device.