Patent ID: 6820028
Filing Date: 2004-11-16
Classification: G01D,H01L

Abstract:
An EIW unit for use in measuring a physical characteristic of an electrically conductive layer that is deposited or formed by integrated circuit processing equipment which is used to manufacture an integrated circuit, the EIW unit comprising:a substrate having a wafer or wafer-like shape and a first surface to receive the conductive layer that is deposited or formed by the integrated circuit processing equipment; and a sensor structure disposed on or in the substrate, the sensor structure including a plurality of electrodes that are disposed on or in the substrate such that at least a portion of each electrode is exposed on the first surface of substrate wherein each electrode is spatially located, relative to the other electrodes and the conductive layer, on or in the substrate to permit measuring of the physical characteristic of the conductive layer after deposition or formation of the conductive layer on the EIW unit, and wherein the plurality of electrodes, in conjunction with the conductive layer deposited or formed on the first surface of the substrate, form a four-point probe type sensor.