Electrical Performance Comparison between Coaxial and Non-coaxial Silicone Rubber Socket

This paper compared a coaxial silicone rubber socket and non-coaxial socket for high-performance package test. The silicone rubber socket is a kind of the elastomer test sockets consisting of metal powders in the elastomer material. The noncoaxial silicone rubber socket may have the limited electrical performances due to its pitch. Because the pitch is determined by the package's footprint. For this, the coaxial silicone rubber socket was proposed to provide the improved insertion loss and crosstalk noise. The coaxial silicone rubber socket has extra ground powders around the signal powders to configure the coaxial structure. This coaxial structure has advantages in characteristic impedance matching and crosstalk noise reduction. Therefore, this paper compared the insertion loss and crosstalk for the non-coaxial and coaxial silicone rubber socket.