Fine pitch guided vertical probe array having enclosed probe flexures
View Patent ↗Probes suitable for use with densely packed fine-pitch 2-D contact arrays are provided by use of an electrically insulating guide plate in connection with vertical probes, where the vertical probes have probe flexures that are either vertically folded sections, or coils having a horizontal axis. Preferably, the probes are configured such that the probe flexures are inside the guide plate holes, and the parts of the probes extending past the guide plate are relatively rigid. This configuration alleviates problems associate with probe shorting, because the probe flexures are enclosed by the guide plate holes, and are therefore unable to come into contact with flexures from other probes during probing.
1. A probe array comprising:
two or more vertical probes each including a probe flexure;
a guide plate having two or more through holes, wherein the vertical probes are disposed in the through holes;
wherein the probe flexures include coils having a horizontal coil axis, wherein the horizontal coil axis is perpendicular to an axis through the through holes, and wherein the horizontal coil axis is enclosed by coil loops formed by a single member that winds around the horizontal coil axis.
2. The probe array of claim 1 , wherein the probe flexures are inside the through holes, and wherein parts of the probes that extend beyond the through holes are substantially more rigid than the probe flexures.
3. The probe array of claim 1 , wherein adjacent probes are spaced by 100 μm or less.
4. The probe array of claim 3 , wherein the probes are arranged in a 2-D densely packed array.
5. The probe array of claim 4 , wherein the 2-D densely packed array is selected from the group consisting of: hexagonal arrays, triangular arrays, square arrays and rectangular arrays.
6. The probe array of claim 1 , further comprising a heat sink or heat removal apparatus coupled to the guide plate.
7. The probe array of claim 1 , wherein each of the probes includes a reduced-width skate at its tip.
8. The probe array of claim 1 , further comprising heat sink material disposed in the coils.
9. The probe array of claim 8 , wherein the heat sink material comprises electrically and thermally conductive silicone rubber.
10. The probe array of claim 1 , wherein the vertical probes are individually disposed in the through holes.