Electrically Conductive Pins For Microcircuit Tester
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Accused Products
Abstract
The terminals of a device under test (DUT) are temporarily electrically connected to corresponding contact pads on a load board by a series of electrically conductive pin pairs. The pin pairs are held in place by an interposer membrane with a top facing the device under test, a bottom facing the load board, and a vertically resilient, non-conductive member between the top and bottom contact plates. Each pin pair includes a top and bottom pin, which extend beyond the top and bottom contact plates, respectively, toward the device under test and the load board, respectively. The bottom pins has a lower contact surface which includes an arcuate portion or ridge which increases contact pressure and ablates oxides by the rocking action of ridge when the DUT in inserted.
5 Citations
25 Claims
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1-12. -12. (canceled)
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13. In a contactor to be interposed between a contact load board and a device under test (DUT) having DUT contacts, the contactor including a plurality of having a plurality of contact pads, each contact pad being laterally arranged to correspond to exactly one terminal, said terminals and said pads being generally in vertical axial alignment in pairs, comprising:
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a longitudinally compressible membrane unit for forming a plurality of temporary mechanical and electrical connections between a device under test, the unit having; a longitudinally resilient, electrically insulating interposer between the load board and device under test; a plurality of longitudinally slideable, electrically conductive pin pairs extending through longitudinal holes in the interposer each pin pair in the plurality being laterally arranged to correspond to one terminal on the device under test; the plurality of pin pairs including a top and bottom contact, said pin pair contacts being in generally vertical axial alignment, the top contact having a top engagement surface which engages electrical connections to a device under test, said top engagement;
the bottom contact for engaging a contact on the load board, said top and bottom contacts being generally axially aligned;said bottom contact which engages said load board includes a bottom surface, said bottom surface being arcuate and being in generally axial alignment with said top contact. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of lowering the resistance between a terminal on an integrated circuit and the load board having
an electrically conductive pin having a central axis and a bottom surface engagable with the load board, the method comprising; forming the bottom surface to include a generally planar portion having first and second ends and an arcuate ridge on the surface generally at the central axis generally midway between said first and second ends, whereby engagement of the ridge with the terminal will create a rockable contact point which will focus contact pressure over a small surface area and may further cause ablation of oxides on the terminal while said generally plan portions provides stability to said pin. - View Dependent Claims (23, 24)
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25. A contactor to be interposed between a contact load board having terminals, and a device under test (DUT) having a plurality of DUT contacts, the contactor including a plurality of having a plurality of contact pads, each contact pad being laterally arranged to correspond to exactly one terminal and one DUT contact, said terminals and DUT contact pairs being generally vertically axially aligned one atop the other, comprising:
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a longitudinally compressible membrane unit for forming a plurality of temporary mechanical and electrical connections between a device under test, the unit having; a longitudinally resilient, electrically insulating interposer between the load board and device under test; a plurality of longitudinally slideable, electrically conductive pin pairs extending through longitudinal holes in the interposer each pin pair in the plurality being laterally arranged to correspond to one DUT contact; the plurality of pin pairs including a top and bottom contact, the top contact having a top engagement surface which engages electrical connections to a device under test, said top engagement;
the bottom contact for engaging a contact on the load board, said top and bottom contacts being generally vertically axially aligned;said bottom contact which engages said load board includes a bottom surface, said bottom surface being arcuate and being in generally vertical axial alignment with said top contact.
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Specification