Patent ID: 7023231
Filing Date: 2006-04-04
Classification: G01R

Abstract:
1. A method of measuring at least one electrical property of a semiconductor wafer, the method comprising the steps of: (a) providing an elastically deformable conductive contact formed from an electrically conductive coating overlaying an electrically conductive base material, wherein: the base material has a first work function; the coating has a second work function; and the coating has a thickness of an extent such that the conductive contact has a work function that is intermediate the first work function and the second work function; (b) forming a first electrical contact between the conductive contact and a top surface of a semiconductor wafer; (c) forming a second electrical contact with the semiconductor wafer; (d) applying an electrical stimulus between the first electrical contact and the second electrical contact; (e) measuring a response of the semiconductor wafer to the electrical stimulus; and (f) determining from the response at least one electrical property of the semiconductor wafer.