Patent ID: 8427168
Filing Date: 2013-04-23
Classification: G01R,H05H

Abstract:
1. A plasma monitoring method comprising: preparing a first sensor having two first electrodes formed in a first pattern, with a resistance element being connected between first wires respectively extending from the first electrodes; preparing a second sensor having two second electrodes formed in a second pattern, with second wires respectively extending from the second electrodes; and measuring in-situ a resistance of a side wall of each of the first and second patterns and/or an electric current flowing in the side wall of each of the first and second patterns during plasma processing, using said first and second sensors, wherein the side wall of the first pattern is defined by a first contact hole, one of the two first electrodes is located at an upper end of the first contact hole and the other of the two first electrodes is located at a lower end of the first contact hole, the side wall of the second pattern is defined by a second contact hole, one of the two second electrodes is located at an upper end of the second contact hole and the other of the two second electrodes is located at a lower end of the second contact hole.