Patent ID: 9696369
Date: 2017-07-04
CPC Classifications: G01R

Claim:
1. A wafer test apparatus comprising: a probe station comprising a probe card that contacts a wafer positioned on a chuck during a wafer test; a test head that is disposed on the probe card and tests electrical characteristics of a semiconductor chip positioned on the wafer; and a probe card horizontality adjustment unit positioned between the test head and the probe card that adjusts horizontality of the probe card during the wafer test, wherein the probe card horizontality adjustment unit comprises: an inner circumferential body having a through-hole, an outer circumferential body disposed about an outer circumferential surface of the inner circumferential body, a plurality of connection portions that connect the inner circumferential body and the outer circumferential body about the through-hole, and a probe card weight adjustment member that is provided on each of the plurality of connection portions and adjusts a force applied to the probe card.