Patent ID: 7868636

Claim:
A probe card for testing semiconductor chips on a semiconductor wafer, the probe card comprising: a circuit board receiving electrical signals from outside; a plurality of unit probe modules to contact the semiconductor chips on the semiconductor wafer to transfer the electrical signals to the semiconductor chips, wherein each of the unit probe modules comprises a plurality of micro cantilevers to contact one of the semiconductor chips; a space transformer electrically connected to the circuit board and having the unit probe modules seated on an upper portion of the space transformer, wherein the probe modules are separated by intervals from each other on the space transformer, and the space transformer has vertical apertures penetrating through the space transformer; and a vertical conductive medium electrically connecting at least one of the unit probe modules to the circuit board, wherein the vertical conductive medium is inserted in one of the vertical apertures of the space transformer, and the unit probe modules are arranged at positions spaced from the vertical conductive medium; wherein the vertical conductive medium comprises a plurality of conductive patterns to transfer at least some of the electrical signals from the circuit board to the micro cantilevers through the vertical aperture in which the vertical conductive medium is inserted.