Abstract:
Provided is a vitreous silica crucible suppressing deformation under high temperature, and a method for manufacturing the same. A vitreous silica crucible 1 includes a cylindrical straight body portion 10a, a corner portion 10c formed at lower end of the straight body portion 10a, and a bottom portion 10b connected with the straight body portion 10a via the corner portion 10c. Moreover, the vitreous silica crucible 1 includes a bubble-containing opaque layer 11 constituting an outer layer, and a bubble-free transparent layer 12 constituting an inner layer. A boundary surface, between the opaque layer 11 and the transparent layer 12 in at least the straight body portion 10a, forms a periodic wave surface in a vertical direction.
Abstract:
A vitreous silica crucible, comprising a substantially cylindrical straight body portion having an opening on top end and extending in a vertical direction, a curved bottom portion, and a corner portion connecting the straight body portion with the bottom portion and a curvature of which is larger than that of the bottom portion, wherein, an inner surface of the crucible has a concavo-convex structure in which a groove-shaped valley is interposed between ridges, and an average interval of the ridges is 5 - 100 µm.
Abstract:
A vitreous silica crucible is manufactured by rotational molding in such a manner that the three-dimensional shape thereof matches design data to a high degree. If the degree of matching between three-dimensional shapes of simulation data obtained based on initial property parameters and measurement data falls below a predetermined level, improved property parameters are set such that the degree of matching becomes higher than or equal to the predetermined level. If the degree of matching between three-dimensional shapes of simulation data obtained based on initial manufacturing conditions and the measurement data falls below a predetermined level, improved manufacturing conditions are set such that simulation data matching design data to a degree higher than or equal to the predetermined level is obtained. As a result, the degree of matching between the three-dimensional shapes of the design data and measurement data of the vitreous silica crucible can be enhanced to the predetermined level or higher. That is, it is possible to manufacture a vitreous silica crucible by rotational molding in such a manner that the three-dimensional shape thereof matches the design data to a high degree.
Abstract:
The present invention provides a method for evaluating a vitreous silica crucible which can measure a three-dimensional shape of the inner surface of the crucible in a non-destructive manner. According to the present invention, A method for evaluating a vitreous silica crucible, including the steps of: moving an internal ranging section along an inner surface of the vitreous silica crucible in a contactless manner; measuring a distance between the internal ranging section and the inner surface as a distance from the inner surface, by subjecting the inner surface of the crucible to irradiation with laser light and then detecting a reflected light from the inner surface, the laser light being emitted from the internal ranging section in an oblique direction with respect to the inner surface, and the measurement being conducted at a plurality of measuring points along a course of a movement of the internal ranging section; and obtaining a three-dimensional shape of the inner surface of the crucible, by associating three-dimensional coordinates of each of the measuring points with the distance from the inner surface, is provided.
Abstract:
PROBLEM TO BE SOLVED: To provide an evaluation method of a silica glass crucible that can specify a three-dimensional position of a foreign matter present on an inner surface of or in a wall of a crucible, or can determine three-dimensional distribution of strain of the crucible.SOLUTION: An evaluation method of a silica glass crucible includes a step of radiating a laser beam in the oblique direction from an inside measuring section 17 to the inner surface of a crucible 11 and correlating an inner surface distance measured by detecting the reflection light between the inside measuring section 17 and the inner surface with a three-dimensional coordinate of each measuring point to obtain a three-dimensional configuration of the inner surface of the crucible, and further includes at least one step of (1) a step of specifying a three-dimensional position of the foreign matter by changing a focal position of the crucible 11 in the thickness direction at a location where an image is obtained to obtain a plurality of images, when the foreign matter is determined to be present in the obtained image at the measuring point, and (2) a step of determining of a three-dimensional distribution of strain by obtaining a strain image at a plurality of the measuring points.
Abstract:
PROBLEM TO BE SOLVED: To provide an electronic information management system which can unitarily manage information when many organizations deal with many kinds of information at the same time. SOLUTION: A system 1 for managing intellectual property-related electronic information manages intellectual property-related information, which is used in an organization body comprising a plurality of organizations, as the electronic data. In addition, the models of descriptions of multiple kinds of invention, which are prepared in accordance with technical fields of proposed invention, are stored in a proposed-invention table 122. A management server 11 directly or indirectly extracts the models of the descriptions of the invention, which are stored in the proposed-invention table 122, according to instructions from an invention organization terminal computer 13 and displays them on the invention organization terminal computer. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a silica glass crucible producible by an easy method and suppressing melt level vibration.SOLUTION: The silica glass crucible includes: a straight body extending in the vertical direction and having an approximately cylindrical shape; a curved bottom; and a corner part connecting smoothly the straight body and the bottom. The inner surface of the crucible has a fine uneven structure.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for inspecting an abnormal site such as a brown ring in a silica glass crucible.SOLUTION: The method for inspecting an abnormal site includes a determination process for determining whether an abnormal site is generated or not on a measurement point based on the spectrum obtained by measuring at least one of the IR spectrum and the Raman spectrum at the measurement point on the inner surface of the silica glass. The determination on the IR spectrum measurement is performed in accordance with the presence or absence of a peak between wavenumbers of 1,080 cmand 1,100 cmor the presence or absence of a peak between wavenumbers of 1,150 and 1,250 cm. Also the determination in the Raman spectrum measurement is performed in accordance with the presence or absence of a peak between wavenumbers of 500 and 550 cm.