Patent ID: 8253429

Claim:
A probe card comprising: a plurality of probe units, each comprising a guide member and at least one probe secured by the guide member and contacting a chip pad to be tested; a plurality of space transformers arranged below the respective probe units, each space transformer having wires electrically connected to lower terminals of the probes; a frame having a plurality of guide holes for fixedly positioning the respective probe units; an interposer array arranged below the space transformers for supporting the space transformers, the interposer array comprising electrical connection means for supplying test signals to the wires of the space transformers; and a printed circuit board arranged below the interposer array for supporting the interposer array and electrically connected to the electrical connection means for supplying the test signals, wherein each space transformer comprises measurement devices arranged on an upper surface for enhancing test performance to a device to be tested, wherein the frame comprises a plurality of holes on a bottom surface for receiving the measurement devices, and the frame being made of any of Invar, Kovar, quartz, steel, and ceramic.