Abstract:
A method of inspecting a wafer may include: loading of a wafer onto a stage, the wafer having a plurality of dies thereon; positioning of the wafer such that a plurality of electron beam columns on the wafer respectively face a partial region of each of the plurality of dies on the wafer; scanning the respective partial regions of each of the plurality of dies by using the electron beam columns; and combining a plurality of partial images that are obtained by scanning the partial regions to provide a die image.
Abstract:
A surface inspecting method includes: irradiating an incident light beam of a first polarized state on a target object, the incident light beam comprising parallel light and having a cross-sectional area: measuring a second polarized state of a reflected light beam reflected from the target object; and performing inspection on an entire area of the target object on which the incident light beam is irradiated, based on a variation between the first polarized state and the second polarized state.
Abstract:
Provided is a wafer inspection apparatus using three-dimensional (3D) images, which apparatus may acquire a 3D image by adjusting a focal position at a high speed, and inspect a wafer by using the 3D image so that a 3D inspection operation may be precisely performed on patterns formed on the wafer at a high speed. The wafer inspection apparatus may include a stage on which a wafer is disposed, an optical apparatus configured to acquire an image of a pattern formed on the wafer by using a scan method, a focus adjusting unit configured to change a focal position of light irradiated to the wafer according to a scan speed of the optical apparatus, and an image processor configured to integrate images corresponding to focal positions and generate and analyze 3D images.
Abstract:
A conductive atomic force microscope including a plurality of probe structures each including a probe and a cantilever connected thereto, a power supplier applying a bias voltage, a current detector detecting a first current flowing between a sample object and each of the probes and a second current flowing between a measurement object and each of the probes, and calculating representative currents for the sample and measurement objects based on the first and second currents, respectively, and a controller calculating a ratio between representative currents of the sample object measured by each of the probe structures, calculating a scaling factor for scaling the representative current with respect to the measurement object measured by each of the probes, and determine a reproducible current measurement value based on the second measurement current and the scaling factor may be provided.
Abstract:
A method of inspecting a wafer may include: loading of a wafer onto a stage, the wafer having a plurality of dies thereon; positioning of the wafer such that a plurality of electron beam columns on the wafer respectively face a partial region of each of the plurality of dies on the wafer; scanning the respective partial regions of each of the plurality of dies by using the electron beam columns; and combining a plurality of partial images that are obtained by scanning the partial regions to provide a die image.
Abstract:
A surface inspecting method includes: irradiating an incident light beam of a first polarized state on a target object, the incident light beam comprising parallel light and having a cross-sectional area: measuring a second polarized state of a reflected light beam reflected from the target object; and performing inspection on an entire area of the target object on which the incident light beam is irradiated, based on a variation between the first polarized state and the second polarized state.