Patent ID: 8754372
Filing Date: 2014-06-17
Classification: G01R,G11C,H01J,H01L

Abstract:
1. A test structure for determining a defect of a semiconductor device, comprising: a plurality first cylindrical conductors, each of said first cylindrical conductors being grounded wherein said first cylindrical conductor is grounded through at least one first conductive plug and an active area wherein said first conductive plug and said active area are under said first cylindrical conductor; and a plurality of second cylindrical conductors, each of said second cylindrical conductors being floated, said first and second cylindrical conductors being interlaced and vertical to a upper surface of said test structure wherein said second cylindrical conductor is floated through at least one second conductive plug and an isolation member, wherein said defect is determined by monitoring the voltage contrast from a charged particle microscope image of said first and second cylindrical conductors.