Patent ID: 8098076
Filing Date: 2012-01-17
Classification: G01R

Abstract:
1. A probe card assembly, comprising: at least one probe substrate each having test probes configured to contact test features of a device under test (DUT); a wiring substrate, coupled to the at least one probe substrate, having a connector configured for coupling with a source termination of a tester; a signal path formed in and/or on the wiring substrate and the at least one probe substrate, the signal path having a trace and trace stubs fanning out from the trace, an input of the trace being coupled to the connector and outputs of the trace stubs being coupled to the test probes; and a resistive termination separate from the signal path and coupled from the trace to at least one potential, wherein an impedance of the resistive termination and impedances of the trace stubs are in parallel and a parallel sum of the impedance of the resistive termination and the impedances of the trace stubs is approximately equal to an impedance of the trace.