Investigation of vertical interposers for high frequency operation

Horizontal probe station poses challenges in determining performance of vertical interposers for test socket. In this paper, a PCB test structure has been proposed for measurement of our designed interposers up to 20 GHz. A new test structure is further proposed and simulated with HFSS to achieve a higher operating frequency. By converting the S-parameters of test structures to T-parameters and splitting of cascaded blocks using optimization method, the performance of an individual vertical interposer can be obtained.