Patent ID: 7723724

Claim:
A system for evaluating a fabrication of a wafer that includes one or more die, the system comprising: one or more test structures that each comprise: a combination of device and interconnect elements that are provided on an active region of a die on the wafer prior to the fabrication of the wafer being completed, the combination of device and interconnect elements including one or more circuits that are activatable to produce an output corresponding to measurable electrical and/or optical characteristics; includes a power receiving element that is configured to receive activation energy sufficient to cause the output on a contactless medium; wherein the one or more circuits are structured to generate a variation in either the output or in a parameter determined from output, as a result of a process variation in a specific fabrication step that provided elements for forming the one or more circuits; a detector to detect the output over the contactless medium, so as to receive the output without affecting a usability of the wafer when fabrication is completed.