A method for verifying that a physical location of a memory matches a
design logical representation, without having to use a focused ion beam
to physically damage a memory location. The method provides that either a
temporary or permanent circuit "defect" is intentionally created in the
physical layout. Then, the new electrical schematic is extracted from the
modified physical layout. Subsequently, if the design "defect" which was
created is temporary, the new electrical schematic is simulated, the
logical address of the "defect" is determined, and the extracted logical
address is compared to the expected address to verify the logical to
physical correlation. Alternatively, if the design "defect" which was
created is permanent, after the new electrical schematic is extracted
from the modified physical layout, the product is fabricated and the
known design "defect" location is used to correlate to the
electrically-tested defect logical location.