Patent ID: 7250313
Filing Date: 2007-07-31
Classification: H01L

Abstract:
1. A method of determining the efficacy of ion implantation in a semiconductor wafer comprising: (a) providing a semiconductor wafer having a substrate of semiconducting material and a screen dielectric layer overlaying the substrate of semiconducting material; (b) defining on a surface of the screen dielectric layer opposite the semiconducting material a cured photoresist that includes at least one aperture therethrough where the screen dielectric layer is exposed; (c) ion implanting the side of the semiconductor wafer having the photoresist thereon whereupon at least a portion of the ions impacting the screen dielectric layer via the aperture in the photoresist come to rest in the semiconducting material adjacent the aperture; (d) removing the photoresist from the semiconductor wafer; (e) prior to annealing the semiconductor wafer, forming at least one electrical contact with the surface of either the screen dielectric layer or the substrate of the semiconductor wafer in alignment with or adjacent the semiconducting material containing the ions, wherein each electrical contact is in non-damaging contact with the surface; (f) measuring via the electrical contact an electrical response of the semiconducting material containing the ions in response to the application of an electrical stimulus; and (g) determining from the measured electrical response whether the ion implantation is within acceptable tolerance(s).