Patent ID: 8400182
Filing Date: 2013-03-19
Classification: G01R

Abstract:
1. A wafer inspection device, which inspects electrical properties of a semiconductor wafer on which a semiconductor integrated circuit is formed using a probe card, the probe card having a thin film substrate on which an electrode for contact and a non-contact probe pattern using capacitive coupling or inductive coupling are formed and being formed so that the pressure of a first sealed space constituted by mutually facing surfaces of the probe card and the thin film substrate can be controlled; the wafer inspection device comprising: a wafer stage that holds the semiconductor wafer on the upper surface and is movably provided; and a mechanism for aligning the probe card and the semiconductor wafer, wherein the wafer stage is provided on the outer periphery with a seal ring that forms a second sealed space between the thin film substrate and the semiconductor wafer by bringing the semiconductor wafer close to the probe card or pressing the semiconductor wafer close against the probe card; and the pressure of the first sealed space and the pressure of the second sealed space can be independently reduced.