Xandex probe block assemblies incorporate Xandex spring probe transmission lines into high density spring probe arrays. Each module consists of multiple signal (I/O) spring probe channels, each isolated by two, three or four ground pins depending on individual performance requirements. One or more test sites can be arrayed in each probe block module. Utility and power channels can be integrated with the signal probes in the same module or "ganged" into separate power/utility modules. Modules can be retained in a circular tower to accommodate typical wafer probe interface geometry or in a square grid suited to final test. Through the scalability inherent in this modular approach, test throughput can be customized to the device type and tester capabilities by adding or subtracting probe modules. Probe Spacing The Xandex spring probe/ receptacle design provides for signal channel spacing of 2.5mm between signal channels, and ground spacing of 1.8 mm. Spring probe pins are available in multiple tip configurations. Vacuum Capability Xandex spring probe blocks and transmission lines can be provided with vacuum capability, enabling their use in applications where a high degree of parallelism is required and vacuum is used to compress large numbers of spring probes. Electrical Performance The electrical performance range of Xandex Transmission Lines and Probe Blocks is greatly influenced by the backplane / probe electronics connector. Depending on the connector chosen, the resulting bandwidth range of Xandex blocks is 3 GHz at -3 dB to 10 GigaHertz at -3dB. Signal to signal probe spacing of 2.5 mm is standard, with +3 å return loss (VSWR) of -10 dB @ 2.8 GHz and -10 dB @ 8.8 GHz. * RF capability is also available up to 18 GHz at -1 dB and +3 å return loss (VSWR) of -13 dB @ 20 GHz. See the Transmission Line Specifications section for performance specifications for examples of the Xandex spring probe/receptacle combined with specific connector combinations. *Digital specifications are for 26 gauge cable 25cm length using Xandex spring probe and receptacle. |