Abstract:
A method of measuring a static magnetic field distribution in a nuclear magnetic resonance (NMR) inspection system which comprises magnetic field generator for producing a static magnetic field, inclination or gradient magnetic fields and a high-frequency magnetic field, a signal detector for sensing nuclear magnetic resonance signals from an inspection sample, a computer for processing output signals from the signal detector and an output device for providing a computational result of the computer, wherein a time interval t.sub.1 from the center of a 90.degree.-pulse high-frequency magnetic field to the center of a 180.degree.-pulse high-frequency magnetic field is made different by a time difference t.sub.0 from a time interval t.sub.2 from the center of the 180.degree.-pulse high-frequency magnetic field to a peak of a spin echo, so that static magnetic field distribution is calculated based on the computer output which corresponds to the difference of the two time intervals.
Abstract:
A waterproof watch case construction depends on gaskets alone for waterproofing and is free of cement. The construction is such that a broken crystal can be readily replaced, and the watch case itself can be of any shape, including square, ovoid and hexagonal, as well as circular. The watch crystal is located positively by means of a bezel and a ring which compress a gasket both axially and radially against the watch crystal.
Abstract:
This invention relates to a touch response sensor for an electronic musical instrument which may control the volume, pitch, tone-color or the like of the musical tones produced by the instrument upon depression of the key responsive to the key depressing pressure. In order to detect the key depressing pressure, the touch response sensor has an electrically conductive resilient member having two legs downwardly extending therefrom for producing resistance variations between contact pieces provided on a base plate under the resilient member in response to the key depressing pressure. The contact pieces are, for example, connected via lines to a voltage-controlled variable-frequency oscillator circuit, voltage-controlled variable filter circuit, voltage-controlled variable gain amplifier circuit or the like so as to vary the volume and the like of the tones in accordance with the key depressing pressure.
Abstract:
A surface inspecting apparatus can inspect a smaller defect by using a PSL of a smaller particle size. However, the particle size of the PSL is restricted. In the conventional surface inspecting apparatus, therefore, no consideration has been taken as to how to inspect the defect of such a small particle size as is not set in the PSL which will be needed in the near future in an inspection of a semiconductor manufacturing step. The invention has a light source device for generating light which simulated at least one of a wavelength, a light intensity, a time-dependent change of the light intensity, and a polarization of light which was scattered, diffracted, or reflected by an inspection object, and the light is inputted to a photodetector of the surface inspecting apparatus. The smaller defect can be inspected.
Abstract:
The present invention has been made in view of the above, and an object thereof is to provide a manufacturing technique capable of manufacturing a diffraction grating which is suitable for use in a spectrophotometer and has an apex angle of a convex portion of about 90° and can satisfy high diffraction efficiency and a low stray light amount. A method of manufacturing a diffraction grating, the method including: setting an exposure condition such that a sectional shape of a convex portion of a resist on a substrate, which has been formed by exposure, is an asymmetric triangle with respect to an opening portion shape of a mask having an opening portion with a periodic structure and an angle formed by a long side and a short side of the triangle is about 90°; and performing exposure.
Abstract:
The present invention provides an inspection apparatus having a high throughput and high sensitivity with respect to a number of various manufacturing processes and defects of interest in inspection of a specimen such as a semiconductor wafer on which a pattern is formed. The apparatus illuminates with light the specimen having the pattern formed thereon, forms an image of the specimen on an image sensor through a reflective optics, and determines the existence/nonexistence of a defect. The reflective optics has a conjugate pair of Fourier transform optics. An aberration of the reflective optics is corrected off-axis. The reflective optics has a field of view in non-straight-line slit form on the specimen surface. Also, the optics is of a reflection type, includes a conjugate pair of Fourier transform optics and has a field of view in non-straight-line slit form. An optimum wavelength band is selected according to the specimen (FIG. 1).
Abstract:
An appearance inspection apparatus analyzes a difference in detection characteristics of detection signals obtained by detectors to flexibly meet various inspection purposes without changing a circuit or software. The apparatus includes a signal synthesizing section that synthesizes detection signals from the detectors in accordance with a set condition. An input operating section sets a synthesizing condition of the detection signal by the signal synthesizing section, and an information display section displays a synthesizing map structured based on a synthesized signal which is synthesized by the signal synthesizing section in accordance with a condition set by the input operating section.
Abstract:
A surface inspection method and a surface inspection apparatus in which a plurality of photodetectors are arranged in a plurality of directions so that light scattered, diffracted or reflected on a surface of an object to be inspected or in the vicinity of the surface is detected and a plurality of signals obtained by this are subjected to weighted addition processing or weighted averaging processing by linear combination.
Abstract:
An appearance inspection apparatus analyzes a difference in detection characteristics of detection signals obtained by detectors to flexibly meet various inspection purposes without changing a circuit or software. The apparatus includes a signal synthesizing section that synthesizes detection signals from the detectors in accordance with a set condition. An input operating section sets a synthesizing condition of the detection signal by the signal synthesizing section, and an information display section displays a synthesizing map structured based on a synthesized signal which is synthesized by the signal synthesizing section in accordance with a condition set by the input operating section.
Abstract:
A surface inspecting apparatus rotates a semiconductor wafer 100 (inspection object) as a main scan while translating the semiconductor wafer 100 as an auxiliary scan, illuminates the surface of the semiconductor wafer 100 with illuminating light 21, thereby forms an illumination spot 3 as the illumination area of the illuminating light 21, detects scattered or diffracted or reflected light from the illumination spot, and detects a foreign object existing on the surface of the semiconductor wafer 100 or in a part of the semiconductor wafer 100 in the vicinity of the surface based on the result of the detection. In the surface inspecting apparatus, the translation speed of the auxiliary scan is controlled according to the distance from the rotation center of the semiconductor wafer 100 in the main scan to the illumination spot. With this control, the inspection time can be shortened while the deterioration in the detection sensitivity and the increase in the thermal damage during the surface inspection are suppressed.