摘要:
A method of determining integrity of a can seam including disposing the can seam between an X-ray source and an X-ray detector, exposing an overlap region of the can seam to radiation from the source, and determining an indication of integrity of the overlap region from a measure of variation in radiation intensity readings taken by the detector over a series of circumferential intervals of the can seam.
摘要:
A method for measuring a film thickness of an SOI layer of an SOI wafer including at least an insulator layer and the SOI layer which is formed on the insulator layer and is formed of a silicon single crystal, wherein a surface of the SOT layer is irradiated with an electron beam, characteristic X-rays are detected from a side of the SOI layer surface irradiated with the electron beam, the characteristic X-rays being generated by exciting a specific element in the insulator layer with the electron beam that has passed through the SOI layer and has been attenuated in the SOI layer, and the film thickness of the SOI layer is calculated on the basis of an intensity of the detected characteristic X-rays.
摘要:
Thickness measurer for metal elements (11), comprising a source device (20), able to emit a bundle (F) of ionizing radiations, at a predetermined or predeterminable intensity, a receiver device (24), disposed on an opposite side with respect to the metal element (11) and suitable to detect the residual intensity of the bundle (F) of ionizing radiations. The measurer comprises a cooling device, associated with the source device (20). The cooling device comprises a heat pump element (30), to remove heat from the source device (20) so as to keep the source device (20) at a predetermined and controlled temperature. The thickness measurer also comprises detection means (46, 124) for the direct or indirect detection of the intensity, or the variation in intensity, of the bundle (F) emitted by the source device (20). The detection means (46, 124) is associated with the heat pump element (30), in order to keep the emission of the bundle (F) of ionizing radiations stable.
摘要:
The material strength of extensive objects can be determined efficiently by using two distance measures, wherein a first distance measurer determines the distance to a first main surface of the object and a second distance measurer determines the distance to a second main surface object opposing the first main surface. If potential measurement errors due to the extensive geometry are avoided by determining a reference distance between the first distance measurer and the second distance measurer by a reference object, the thickness of the object between the first main surface and the second main surface can be determined with high accuracy and velocity.
摘要:
A method of determining integrity of a can seam including disposing the can seam between an X-ray source and an X-ray detector, exposing an overlap region of the can seam to radiation from the source, and determining an indication of integrity of the overlap region from a measure of variation in radiation intensity readings taken by the detector over a series of circumferential intervals of the can seam.
摘要:
Thickness measurer for metal elements (11), comprising a source device (20), able to emit a bundle (F) of ionizing radiations, at a predetermined or predeterminable intensity, a receiver device (24), disposed on an opposite side with respect to the metal element (11) and suitable to detect the residual intensity of the bundle (F) of ionizing radiations. The measurer comprises a cooling device, associated with the source device (20). The cooling device comprises a heat pump element (30), to remove heat from the source device (20) so as to keep the source device (20) at a predetermined and controlled temperature. The thickness measurer also comprises detection means (46, 124) for the direct or indirect detection of the intensity, or the variation in intensity, of the bundle (F) emitted by the source device (20). The detection means (46, 124) is associated with the heat pump element (30), in order to keep the emission of the bundle (F) of ionizing radiations stable.
摘要:
The aim of the method is to characterize an element (21) comprising a plurality of superposed layers separated from one another by interfaces. It comprises at least the following steps: The element (21) is illuminated with radiation (15) emitted by a source (13); radiation (23) transmitted through the element (21) is collected on a detector (17), this transmitted radiation forming an experimental image of the element (21) on the detector (17), the detector (17) being placed at such a distance from the element (21) that interference fringes appear on the experimental image at the interfaces between the layers; and an approximate value of at least one physical characteristic of at least one given layer is determined by calculation from the experimental image, the determination step being implemented by minimizing the difference between the experimental image and a simulated image of at least part of the experimental image of the element (21).
摘要:
A method and computer program software product for establishing an areal density of an elemental constituent of one layer of a stack of layers of material overlying a substrate. Incident penetrating radiation excites characteristic x-ray fluorescent radiation in multiple lines associated with each of one or more elements. Areal densities of successive layers are determined by self-consistent solution of equations relating the ratios of intensities of the characteristic fluorescence lines of successive elements.
摘要:
A digital radiography imaging system for acquiring digital images of an object, and a method for transforming digital images into an absolute thickness map characterizing the object under inspection. The system includes a radiation source for directing radiation through a desired region of the object, and a radiation detector having a plurality of sensing elements for detecting radiation passing through the object. Numerical data generated from each sensing element is calibrated, for example by correcting for variations in radiation paths between the source and detector, by correcting for variations in the spatial frequency response (MTF) of the detector, by correcting for variations in the geometric profile of the object under inspection, and by correcting for material contained in and/or around the object. The calibrated data is processed in order to generate and display an absolute thickness map of the object. The calibration procedures are adapted for extracting a thickness map from both isotope sources and X-ray tube sources.
摘要:
A wall thickness of each layer or a size of a space between layers of a multilayer structured container can be easily measured with high accuracy. According to a method for measuring an inner size of a container by irradiating a multilayer structured container 2 as a target for measurement with X-rays radiated from an X-ray generating source 12 and by detecting the X-rays transmitting the container by a detector 14, the X-ray generating source 12, a slit 15, and the detector 14 perform a linear scan to the container 2 in a direction orthogonal to beams 17 in addition to disposing the slit (a double slit) 15 which narrows the X-rays transmitting the container down to the narrow beams 17 in front of the detector 14 and disposing a focal spot 12a of the X-ray generating source 12, a center of the slit 15, and a center of the detector 14 on a same straight line. The X-ray beams 17 are irradiated substantially parallel to a tangential direction of a container peripheral wall, and the X-rays transmitting the container peripheral wall are detected by the detector; thereby a thickness of each layer or the space between layers of the container peripheral wall is measured based on an obtained intensity distribution curve of damping on transmission.