Probe card using coaxial pins

Abstract

The invention relates to a probe card using co-axial needles, including a circuit board with a top surface and a bottom surface, a through hole from the top surface to the bottom surface, a mounting base positioned under the bottom surface of the circuit board, an electrical connector arranged on the top surface of the circuit board and having a signal conductor and a grounding conductor which are insulated from each other, a signal probe, and a grounding probe. The signal probe comprises a probe core, an insulator arranged on the external periphery of the probe core, and a conductor arranged on the external periphery of the insulator. The signal probe is fixed on the mounting base and inserted in the through hole in the circuit board. The probe core and the conductor are electrically connected with the signal conductor and the grounding conductor of the electrical connector respectively. The grounding probe is fixed on the mounting base and is electrically connected with the conductor of the signal probe at the position of the mounting base.

Description

technical field [0001] The present invention relates to a probe card, in particular to a probe card using coaxial needles. Background technique [0002] The Chinese Taiwan Patent Publication No. 201428300 provides a probe card 10, such as figure 1 As shown, the probe card 10 includes an overlapping circuit board 11 , an interposer 12 and a base plate 13 , a fixing base 14 disposed at the bottom of the base plate 13 , and a plurality of probes 15 fixed on the fixing base 14 . , each probe 15 has a needle body 151 pierced through the circuit board 11 , the intermediate board 12 , the base plate 13 and the fixing seat 14 , a needle head 152 protruding from the bottom surface of the fixing seat 14 , and a The pin tail 153 protruding from the top surface is curved and electrically connected to a signal contact 112 and a ground contact 114 on the top surface of the circuit board 11 . [0003] Each probe 15 adopts a coaxial needle, that is, each probe 15 includes a conductive nee...

AI Technical Summary

Problems solved by technology

[0004] However, the insulator and conductor 155 of each probe 15 do not cover the part where the needle core 154 is connected to the signal contact 112, so that this part is exposed, resulting in discontinuous impedance matching of the probe 15 and the effect of shielding interference is also affected to some extent.

As the performance requirements of probe cards are becoming more and more frequent, although the aforementioned probe cards can meet the needs of the current industry, there is still room for improvement.

In addition, the needle tail 153 of each probe 15 is curved, and the conductor 155 needs to be electrically connected to the ground contact 114 through an external wire 16. Such a structure makes it inconvenient to install the probe 15, and it is also inconvenient to jump wires. Processing (that is, wires are connected to the needle core 154 or the signal contact 112 so that the needle core 154 is electrically connected to other contacts on the top surface of the circuit board 11)

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