Patent ID: 6190520
Filing Date: 2001-02-20
Classification: G01N

Abstract:
An impurity measuring device comprising:a frame adapted to be disposed on one surface of a substrate, the frame having an opening hole extending therethrough so that when the frame is disposed on the surface of the substrate a cavity is formed by the frame and said surface of the substrate, a first solution being poured into the cavity when the impurity measuring device is used to dissolve impurities existing on said surface of the substrate and within the substrate into the first solution;a plurality of electrodes which are put into the first solution in said cavity;a voltage supply for supplying a voltage across the electrodes to deposit the impurities dissolved in the first solution onto the electrodes;a vessel containing a second solution into which said electrodes with the impurities deposited thereon are soaked to dissolve the deposited impurities on the electrodes into the second solution; anda measuring unit for measuring the impurities dissolved in the second solution.