What is the smallest defect that I can see?
In the “Z” (depth) direction, AMI is sensitive to separations as small as 200 Angstroms. In the X-Y directions, the resolution is based on the ultrasonic frequency and the design of the transducer. Typically the resolution is about 250 microns for 10 MHz, 75 microns for 30 MHz, 25 microns for 100 MHz and 10 microns for 230 MHz. However, a transducer can actually detect defects smaller than its resolution by an order of magnitude. You may not be able to “resolve” the defect, but you can “detect” that it is there.
