Patent ID: 7279913

Claim:
A testing assembly for an electrical test of an electronic package, the electronic package comprising a plurality of contacts disposed on a contact surface of the electronic package, the testing assembly comprising: a testing circuit board, comprising: a conductive layer disposed on a surface of the testing circuit board having a plurality of testing pads; an insulating layer: and a reference plane overlaid with the conductive layer, insulated from the conductive layer by the insulating layer, and comprising at least one non-conductive region disposed corresponding to one of the testing pads; and a testing socket disposed on the testing circuit board, comprising: an insulating body comprising a holding surface for supporting the contact surface of the electronic package, and at least a low-dielectric constant regions, wherein a dielectric constant of the low-dielectric constant region is lower than a dielectric constant of other regions in the insulating body; and a plurality of pins passing through the insulating body to serve as the electric channels between the contacts and the testing pads, and the low-dielectric constant regions are disposed on a side edge of one of the pins.