Patent ID: 8841931
Filing Date: 2014-09-23
Classification: G01R,Y10T

Abstract:
1. A method of preparing a wafer test system, comprising: determining a probe card design to test a first wafer having a first type of device and a second wafer having a second type of device, wherein the second type of device having a different signal scheme, wherein the determining the design includes: fabricating a first and a second probe card according to the design; adding a first set of conductive lines to the first probe card such that the first set of conductive lines are positioned above the PCB and each conductive line having two ends attached to a surface of the PCB remote to the space transformer, wherein the adding the conductive lines is based on the signal scheme of the first device; adding a second set of conductive lines to the second probe card such that the second conductive lines are positioned above the PCB and each conductive line having two ends attached to a surface of the PCB remote to the space transformer, wherein the adding the conductive lines is based on the signal scheme of the second device.