Method of probing a device using captured image of probe structure in which probe tips comprise alignment features
View Patent ↗An image of an array of probes is searched for alignment features. The alignment features are then used to bring contact targets and the probes into contact with one another. The alignment features may be a feature of one or more of the tips of the probes. For example, such a feature may be a corner of one of the tips. An array of probes may be formed to have such alignment features.
1. A method of probing an electronic device, the method comprising:
providing a probing device comprising a plurality of probes each comprising a contact tip configured to contact the electronic device, each of ones of the probes in a set of the probes comprises a spring body attached at a first end to the probing device and a support structure attached to a second end of the spring body, the support structure comprising a generally planar surface from which one of the contact tips extends;
focusing a camera on the generally planar surface of ones of the support structures;
capturing an electronic image of the generally planar surface of the ones of the support structures;
searching areas of the captured electronic image corresponding to the generally planar surface of the ones of the support structures for image features corresponding to particular features of the contact tips; and
effecting contact between targets on the electronic device and the contact tips of the probes, the effecting contact comprising utilizing the image features corresponding to the particular features of the contact tips to align the contact tips of the probes and the targets on the electronic device.
2. The method of claim 1 , wherein for at least two of the probes in the set, a first edge of the contact tip is located at least a predetermined minimum distance from a periphery of the generally planar surface of the support structure along a predetermined minimum length of the first edge.
3. The method of claim 2 , wherein for at least one of the at least two probes in the set, at least one of the edges of the contact tip is located closer than the predetermined minimum distance from the periphery of the generally planar surface of the support structure along the predetermined minimum length of the at least one of the edges.
4. The method of claim 2 , wherein:
each of the probes comprises a spring body attached at a first end to the probing device and a support structure attached to a second end of the spring body, the support structure comprising a generally planar surface from which a contact tip extends, and
for a plurality of the probes, each of at least three of the edges of the contact tip are located closer than the predetermined minimum distance from the periphery of the generally planar surface of the support structure along the predetermined minimum length of the at least one of the edges.
5. The method of claim 1 , wherein for at least two of the probes in the set, a first corner of the contact tip is located at least a predetermined minimum distance from the periphery of the generally planar surface of the support structure.
6. The method of claim 5 , wherein for at least one of the at least two probes in the set, a second corner of the contact tip is located closer than the predetermined minimum distance to the periphery of the generally planar surface of the support structure.
7. The method of claim 5 , wherein:
each of the probes comprises a spring body attached at a first end to the probing device and a support structure attached to a second end of the spring body, the support structure comprising a generally planar surface from which a contact tip extends, and
for a plurality of the probes, each corner of the contact tip is located closer than the predetermine minimum distance to the periphery of the generally planar surface of the support structure.
8. The method of claim 1 , wherein for at least two of the probes in the set, a first pair of edges of the contact tip that converge to form a first corner of the contact tip are located at least a predetermined minimum distance from a periphery of the generally planar surface of the support structure along a predetermined minimum length of each of the edges in the first pair from the first corner.
9. The method of claim 8 , wherein for at least one of the at least two of the probes in the set, a second pair of edges of the contact tip that converge to form a second corner of the contact tip are located closer than the predetermined minimum distance to the periphery of the generally planar surface of the support structure along the predetermined minimum length of each of the edges in the second pair from the second corner.
10. The method of claim 9 , wherein:
each of the probes comprises a spring body attached at a first end to the probing device and a support structure attached to a second end of the spring body, the support structure comprising a generally planar surface from which a contact tip extends, and
for a plurality of the probes, each pair of edges of the contact tip that converge to form a corner of the contact tip are located closer than the predetermined minimum distance from the periphery of the generally planar surface of the support structure along the predetermined minimum length of each of the edges in the pair from the corner formed by the pair.
11. The method of claim 1 , wherein the effecting contact compresses the spring bodies of the ones of the probes.
12. The method of claim 1 , wherein the spring bodies of the probes are cantilever structures, each of the spring bodies being cantilevered from the first end, each the second ends of the spring bodies being free to move in response to the effecting contact.
13. The method of claim 1 , wherein the captured electronic image comprises light colored areas corresponding to the generally planar surface of the ones of the support structures, the searching comprising searching for dark edges within the light colored areas, the dark edges corresponding to edges of the contact tips extending from the ones of the support structures.
14. The method of claim 13 , wherein the searching further comprises searching for a plurality of dark edges within each of the light colored areas, the dark edges corresponding to edges of the contact tip extending from the support structure corresponding to the light colored area.
15. The method of claim 13 , wherein the searching further comprises searching for pairs of converging dark edges within the light colored areas, the pairs of converging dark edges corresponding to edges of the contact tips extending from the ones of the support structures.
16. The method of claim 13 , wherein the searching further comprises searching for a plurality of pairs of converging dark edges within each of the light colored areas, the plurality of pairs of converging dark edges corresponding to edges of the contact tip extending from the support structure corresponding to the light colored area.