Patent ID: 8638116

Claim:
The impedance matching method for probe card, used to ensure that an impedance of a tester is consistent with that of a device under test, the impedance matching method comprising the following steps: (a) providing a supporting unit for the probe card, the supporting unit having a surface on which at least one conductive contact pad and at least one electronic component are mounted, and the electronic component pressed by an applied force and electrically connected with the conductive contact pad; (b) mounting the probe card which contains the supporting unit described in step (a) between the tester and the device under test; (c) electrically testing an impedance value between the tester and the device under test through the probe card, and performing an exchanging process of the electronic component of probe card upon determining that the measured impedance value is not equal to a predetermined value, and the exchanging process of the electronic component comprising: removing the applied force; replacing the current electronic component from the supporting unit with another new electronic component having a different impedance value; re-exerting the applied force on the new electronic component to ensure that the electronic component is electrically connected with the conductive contact pad; (d) repeating the step (c) until the measured impedance value being equal to the predetermined value.