Anatomy of a PariPoser® Elastomer Test Socket

Oct 27, 2020

This is a typical manual PariPoser® elastomer test socket for an LGA or a wafer. A custom alignment frame is used for each new device (so the socket can be used for multiple DUTs). The engagement mechanism is controlled by an adjusting knob on the top of the socket.

The top portion of the socket is secured to the socket base with dual clamp. The adjusting knob on the top then pushes the DUT into the anisotropic conducting elastomer to make a connection to the PCB test pads.
Removing the cover and the knob reveals the inner workings of the socket. The vertical pushing mechanism and the mounting nest are now visible.
The mounting nest secures the socket to the PCB and provides a housing for the alignment frame and the PariPoser® stretch frame.
The removeable alignment frame is custom-designed for each DUT used in the socket. This frame makes sure that the contact pads on the DUT match up to the pads on the PCB.
Underneath the alignment frame is the removeable PariPoser® stretch frame. This is the contact mechanism used to engage the DUT pads with the PCB pads. Stretching the elastomer on the frame makes it easier to manually insert or repair, and increases the temperature rating of the socket up to 150 °C.
The appropriate PariPoser® anisotropic conductive elastomer option (1.27mm pitch down to 0.1mm pitch) is selected to match the pitch of the DUT. Multiple conductive columns of silver-plated nickel particles are formed throughout the elastomer sheet with a pattern and density that assures about 10 redundant columns for each contact pad.