Abstract:
A multi-station measurement system concept is presented, particularly based on an X-Y stage and plurality of horizontal load/unload units. The system allows loading/unloading of wafers from several load/unload units by the direct action of the X-Y stage, thus creating a buffer for wafers without actually requiring an additional buffer mechanism.
Abstract:
A method for use to identify particles in a medium comprising inputting the medium (22) into an evacuable chamber (12); and irradiating the medium in the chamber by focused radiation (14) of a predetermined power density to cause substantially total fragmentation and ionization of at least small particles in the medium. It causes creation of ionized species including multiply charged ions in case when particles exist in the medium.
Abstract:
An optical measurement method and system are presented for imaging two target structures T1, T2 in two parallel layers L1, L2, respectively, of a sample W, to enable determination of a registration between the two target structures along two mutually perpendicular axes of the layer L1. The sample is illuminated with incident radiation to produce a radiation response of the sample. The radiation response is collected by an objective lens arrangement 14, and the collected radiation response is split into two spatially separated radiation components B1res, B2res. The split radiation components are directed towards at least one imaging plane 24 or 26 along different optical channels characterized by optical paths of different lengths S1, S2, respectively. The two split radiation components are detected in said at least one imaging plane, and two image parts are thereby acquired, each image part containing images of the two target structures.
Abstract:
A method and system are presented for use in measuring in complex patterned structures. A full model and at least one approximate model are provided for the same measurement site in a structure, said at least one approximate model satisfying a condition that a relation between the full model and the approximate model is defined by a predetermined function. A library is created for simulated data calculated by the approximate model for the entire parametric space of the approximate model. Also provided is data corresponding to simulated data calculated by the full model in selected points of said parametric space. The library for the approximate model data and said data of the full model are utilized for creating a library of values of a correction term for said parametric space, the correction term being determined as said predetermined function of the relation between the full model and the approximate model. This enable to process measured data by fitting said measured data to the simulated data calculated by the approximate model corrected by a corresponding value of the correction term.
Abstract:
A system and method for use in spectrometric measurements of an article using selecting an optimal integration time range of the light detection system during which the measurement is to be applied, the optimal integration time being that at which a required value of signal to noise ratio (SNR) of the measurements is obtainable.
Abstract:
A catoptric arrangement (10) is presented. The catoptric arrangement comprises a first element (12) having a concave reflective surface and an optical axis (OA) and a second substantially flat and at least partially reflective element (14) spaced-apart from the first element along the optical axis. The second element is configured to allow light passage therethrough and is oriented with respect to the optical axis and the first element such that at a predetermined angle of incidence of an input light beam onto the second element, the input light beam is reflected onto the reflective surface of the first element and reflected therefrom to pass through the second element.
Abstract:
Disclosed is a method of measuring an optical system artifact that includes introduction into an optical path of a measurement target having at least one edge. Illuminating a section of the edge by a first illumination and illuminating another section of the edge by a second illumination. The difference of the edge images generated by the optical system when illuminated by the first illumination and the second illumination measured in a predefined plane represents the optical artifact.
Abstract:
A method and a system for optical measuring in a structure having a pattern in the form of spaced-apart parallel elongated regions of optical properties different from that of spaces between said regions. The system comprises a broadband illuminator (8) for generating incident radiation, a spectrophotometer arrangement (30) for detecting a spectral response of the structure to the incident radiation, and an optical arrangement (2) for directing the incident light to the structure and collecting the response of the structure, said optical arrangement (2) comprising a numerical aperture (32) selectively limiting the range of at least one of light incidence or collecting angles in direction substantially perpendicular to longitudinal axes of said elongated regions of the pattern.
Abstract:
A test structure is presented to be formed on a patterned structure and to be used for controlling a CMP process applied to the patterned structure, which has a pattern area formed by spaced-apart metal-containing regions representative of real features of the patterned structure. The test structure thus undergoes the same CMP processing as the pattern area. The test structure comprises at least one pattern zone in the form of a metal area with at least one region included in the metal area and made of a material relatively transparent with respect to incident light, as compared to that of the metal.
Abstract:
The present invention provides a novel system and method for obtaining at least one of a cross-section profile, depth, width, slope, undercut and other parameters of via-holes by non-destructive technique. The optical system comprises an illumination system for producing at least one light beam and directing it on a sample in a region of the structure containing at least one via-hole; a detection system configured and operable to collect a pattern of light reflected from the illuminated region, the light pattern being indicative of one or more parameters of said via-hole; and, a control system connected to the detection system, the control system comprising a memory utility for storing a predetermined theoretical model comprising data representative of a set of parameters describing via-holes reflected pattern, and a data processing and analyzing utility configured and operable to receive and analyze image data indicative of the detected light pattern and determine one or more parameters of said via-hole.