Patent ID: 9671431
Date: 2017-06-06
CPC Classifications: G01R,Y10T

Claim:
1. A probe card in contact with pads formed on a plurality of semiconductor dies on a wafer to test the semiconductor dies, the probe card comprising: a printed circuit board on which a plurality of pads are formed; a block plate having a plurality of grooves and attached to the printed circuit board; a plurality of sub-probe units equipped with a plurality of probe tips in contact with the pads of the semiconductor dies and detachably coupled to the plurality of grooves; and a plurality of interposer/space transformer units interposed between the sub-probe units and the printed circuit board and configured to electrically connect the probe tips to the pads of the printed circuit board and transform a pitch of the pads formed on the printed circuit to a pitch of the plurality of probe tips, wherein the interposer/space transformer unit comprises: a body part oriented along a Z-axis, said body part having a plurality of slits formed along a Y-axis direction perpendicular to the Z-axis direction, said plurality of slits defining a space transformation path; and a plurality of micro pins inserted into the plurality of slits along the Z-axis direction of the interposer/space transformer unit, said micro pins electrically connecting the printed circuit board to the sub-probe units, wherein the body part is formed by bonding a first silicon substrate and a second silicon substrate along the Y-axis direction, the first silicon substrate includes the plurality of slits formed thereon, and a surface of the first silicon substrate on which the plurality of slits are formed is matched with the second silicon substrate, wherein a distance between the plurality of slits at the printed circuit board's side is greater than a distance between the plurality of slits at the sub-probe unit's side, and wherein the sub-probe unit further includes a probe substrate into which the probe tips are inserted, and the probe substrate has a through hole through which a tip portion of the probe tip is protruded from one side and a connection portion of the probe tip is protruded from the other side, and the sub-probe unit is coupled to the interposer/space transformer unit by means of a ZIF-type coupling between the micro probe pin inserted into the slit and the probe tip inserted into the through hole.