Patent ID: 7927895

Claim:
A method for determining resistances of defective resistive opens or shorts in a test structure, comprising: forming a first layer of the test structure having one or more elements under test; generating a first e-beam image of the first layer, the first e-beam image graphically identifying defects detected at the first layer, each defect detected at the first layer having a corresponding grey scale level; adding capacitance to the test structure by forming a first metal layer of the test structure; generating a second e-beam image of the first metal layer, the second e-beam image graphically identifying defects detected at the first metal layer, each defect detected at the first metal layer having a corresponding grey scale level; generating a pattern of grey scale levels for each defect based on the corresponding grey scale level of each defect detected at each layer of the test structure; and determining a resistive range of each defect based on the pattern of grey scale levels generated for each defect.