Patent ID: 9726694
Date: 2017-08-08
CPC Classifications: G01R

Claim:
1. A system for testing a device under test, comprising: a circuit board having a pattern of signal contacts and a pattern of guard contacts, the circuit board configured as a plate having a top side, a bottom side, and an opening through the top and bottom sides; a plurality of probe cards, each of the plurality of probe cards including a wire guide, a probe tile connected with the wire guide, and a plurality of probe wires supported by the wire guide and probe tile, the probe wires are positioned through the wire guide and the probe tile, the probe wires include a probe tip extending through the probe tile, the probe tips form an array to probe the device under test, the probe wires include a signal transmitting portion and a guard portion exposed from the wire guide, the signal transmitting portions and the guard portions form a contact pattern, and, with the array, are disposed on one side of each of the plurality of probe cards; and a carriage mechanism configured to position the plurality of probe cards onto the circuit board and to switch from a first of the plurality of probe cards to another of the plurality of probe cards through a pneumatic operation and an automatic control, wherein the probe tile of any of the plurality of probe cards is insertable into the opening of the circuit board to allow the array to probe the device under test, and the contact pattern is contactable with the pattern of signal contacts and the pattern of guard contacts on the circuit board, such contact of the contact pattern with the pattern of signal contacts and the pattern of guard contacts on the circuit board allows signals to be transferred through the probe wires and circuit board.