A low-current pogo probe card for measuring currents down to the femtoamp region includes a laminate board having a layer of conductive traces interposed between two dielectric layers. A plurality of probing devices, such as ceramic blades, are edge-mounted about a central opening so that the probing...http://www.google.co.uk/patents/US6559668?utm_source=gb-gplus-sharePatent US6559668 - Low-current pogo probe card
