Patent ID: 8781779

Claim:
A method for probing a die having a plurality of electrical contacts, the method comprising: moving at least one of a substrate holding unit, which comprises a die, or a probe card assembly relative to each other to bring probe pins on the probe card assembly into electrical contact with the plurality of electrical contacts on the die; testing the die; moving at least one of the substrate holding unit or the probe card assembly in at least one of x direction or y direction while testing the die, wherein testing the die comprises maintaining the probe pins in proper electrical contact with the plurality of electrical contacts on the die, and wherein the moving in at least one of x direction or y direction is relative to the substrate holding unit and the probe card assembly; and predicting a relative position of at least one of the probe pins with respect to a position of at least one of the electrical contacts as a function of time after a substantial change in a condition and wherein the moving is based on the predicting, and wherein the prediction is at least one of substantially in the x direction or substantially in the y direction.