摘要:
In a detection step, light produced on a sample in plural directions are collectively detected using a plurality of detectors. Multidimensional features containing information about scattered light distributions are extracted based on a plurality of detector outputs obtained. The feature is compared with data in a scattered light distribution library thereby to determine the types and sizes of defects. In a feature extraction step, a feature outputted based on the magnitude of each of scattered light detected signals of scatterers already known in refractive index and shape, which are obtained in the detection step, is corrected, thereby realizing high precision determination.
摘要:
When multiple kinds of bacterial colonies are present in a petri dish and, for example, a drug tolerance is to be measured, harvesting of mixed colonies of different types of bacteria makes it impossible to accurately determine the drug tolerance. Also, it is required to improve the throughput of a device for harvesting a bacterial colony. From images illuminated from multiple directions, isolating bacterial colonies are automatically extracted. Next, the image feature amounts are calculated from the multiple images that are illuminated from multiple directions and colonies are grouped depending on the feature amounts. Then, bacterial colonies to be harvested are determined based on the results of the grouping.
摘要:
A defect inspection method includes an illumination light adjustment step of adjusting light emitted from a light source, an illumination intensity distribution control step of forming light flux obtained in the illumination light adjustment step into desired illumination intensity distribution, a sample scanning step of displacing a sample in a direction substantially perpendicular to a longitudinal direction of the illumination intensity distribution, a scattered light detection step of counting the number of photons of scattered light emitted from plural small areas in an area irradiated with illumination light to produce plural scattered light detection signals corresponding to the plural small areas, a defect judgment step of processing the plural scattered light detection signals to judge presence of a defect, a defect dimension judgment step of judging dimensions of the defect in each place in which the defect is judged to be present and a display step of displaying a position on sample surface and the dimensions of the defect in each place in which the defect is judged to be present.
摘要:
In a defect inspection method and an apparatus of the same, for enabling to conduct an inspection of fine defects without applying thermal damages on a sample, the following steps are conducted: mounting a sample on a rotatable table to rotate; irradiating a pulse laser emitting from a laser light source upon the sample rotating; detecting a reflected light from the sample, upon which the pulse laser is irradiated; detecting the reflected light from the sample detected; and detecting a defect on the sample through processing of a signal obtained through the detection, wherein irradiation of the pulse laser emitting from the laser light source upon the sample rotating is conducted by dividing the one pulse emitted from the laser light source into plural numbers of pulses, and irradiating each of the divided pulse lasers upon each of separate positions on the sample, respectively.
摘要:
A defect inspection method includes: illuminating an area on surface of a specimen as a test object under a specified illumination condition; scanning a specimen to translate and rotate the specimen; detecting scattering lights to separate each of scattering lights scattered in different directions from the illuminated area on the specimen into pixels to be detected according to a scan direction at the scanning a specimen and a direction approximately orthogonal to the scan direction; and processing to perform an addition process on each of scattering lights that are detected at the step and scatter approximately in the same direction from approximately the same area of the specimen, determine presence or absence of a defect based on scattering light treated by the addition process, and compute a size of the determined defect using at least one of the scattering lights corresponding to the determined defect.
摘要:
A defect inspection method and device for irradiating a linear region on a surface-patterned sample mounted on a planarly movable table, with illumination light from an inclined direction relative to a direction of a line normal to the sample, next detecting in each of a plurality of directions an image of the light scattered from the sample irradiated with the illumination light, then processing signals obtained by the detection of the images of the scattered light, and thereby detecting a defect present on the sample; wherein the step of detecting the scattered light image in the plural directions is performed through elliptical lenses in which elevation angles of the optical axes thereof are different from each other, within one plane perpendicular to a plane formed by the normal to the surface of the table on which to mount the sample and the longitudinal direction of the linear region irradiated with the irradiation light, the elliptical lenses being formed of circular lenses having left and right portions thereof cut.
摘要:
A defect inspection method wherein illumination light having a substantially uniform illumination intensity distribution in a certain direction on the surface of a specimen is radiated onto the surface of the specimen; wherein multiple components of those scattered light beams from the surface of the specimen which are emitted mutually different directions are detected, thereby obtaining corresponding multiple scattered light beam detection signals; wherein the multiple scattered light beam detection signals is subjected to processing, thereby determining the presence of defects; wherein the corresponding multiple scattered light detecting signals is processed with respect to all of the spots determined to be defective by the processing, thereby determining the sizes of defects; and wherein the defect locations on the specimen and the defect sizes are displayed with respect to all of the spots determined to be defective by the processing.
摘要:
Proposed is a defect inspection method whereby: illuminating light having a substantially uniform illumination intensity distribution in one direction of a sample surface irradiated on the sample surface; multiple scattered light components, which are output in multiple independent directions, are detected among the scattered light from the sample surface and multiple corresponding scattered light detection signals are obtained; at least one of the multiple scattered light detection signals is processed and the presence of defects is determined; at least one of the multiple scattered light detection signals that correspond to each of the points determined by the processing as a defect is processed and the dimensions of the defect are determined; and the position and dimensions of the defect on the sample surface, at each of the points determined as a defect, are displayed.
摘要:
Disclosed is a defect inspection method which makes it possible to scan the entire surface of a sample and detect minute defects without causing thermal damage to the sample. A defect inspection method in which a pulse laser emitted from a light source is subjected to pulse division and irradiated on the surface of a sample which moves in one direction while the divided-pulse pulse laser is rotated, reflection light from the sample irradiated by the divided-pulse pulse laser is detected, the signal of the detected reflection light is processed to detect defects on the sample, and information regarding a detected defect is output to a display screen, wherein the barycentric position of the light intensity of the divided-pulse pulse laser is monitored and adjusted.
摘要:
A defect inspection method wherein illumination light having a substantially uniform illumination intensity distribution in a certain direction on the surface of a specimen is radiated onto the surface of the specimen; wherein multiple components of those scattered light beams from the surface of the specimen which are emitted mutually different directions are detected, thereby obtaining corresponding multiple scattered light beam detection signals; wherein the multiple scattered light beam detection signals is subjected to processing, thereby determining the presence of defects; wherein the corresponding multiple scattered light detecting signals is processed with respect to all of the spots determined to be defective by the processing, thereby determining the sizes of defects; and wherein the defect locations on the specimen and the defect sizes are displayed with respect to all of the spots determined to be defective by the processing.