70results about How to "High surface precision" patented technology

The glass film laminate comprises a glass film and a supporting glass. The glass film and the supporting glass have surfaces being brought into contact with each other, and each of the surfaces has a surface roughness Ra of 2.0 nm or less.

A valve device having a novel vale seat plate is provided. The valve seat plate has an inlet opening, an outlet opening, a front side and a back side. A sealing case covers the front side and inlet and outlet pipes are attached to the back side to communicate respectively with the inlet and outlet openings. A valve element moves to cover the outlet opening on the front side to close the outlet opening. The novel valve seat plate includes at least two plates that are joined to each other. One plate forms the area around the outlet opening and the other plate forms other areas of the valve seat plate.

A method for etching a silicon substrate is presented in which fast etching speed and etching structures with smooth and perpendicular wall surfaces are achieved. In the etching step, a constant electric power is applied to the silicon substrate to provide a bias potential. Using a mixture of SF₆ gas and fluorocarbon gas, there is a step mainly for the progression of dry etching of the etching ground surface. Similarly, using a mixture gas, there is a step mainly for forming a protective layer on the structure surfaces which are perpendicular with respect to the etching ground surface. These two steps are repeated one after the other. In the step for dry etching, the mixture gas is 5-12 volume of fluorocarbon gas with respect to 100 volume SF₆ gas. The mixture gas in the protective film formation step is a mixture of 2-5 volume of SF₆ gas with respect to 100 volume fluorocarbon gas.

The present invention provides a sol of spinous inorganic oxide particles not containing coarse particles, in which particles having extremely homogeneous particles are dispersed in a solvent. An acidic silicic acid is added to a dispersion liquid of core particles to grow core particles, and then again the acidic silicic acid is added at the addition rate 1.2 to 1.8 higher than that in the previous step to prepare a sol of spinous inorganic oxide particles. Then the sol is subjected to centrifugation to remove coarse particles having the diameter of 800 nm or more, thus spinous inorganic oxide particles having peculiar form such as a spinous one being obtained.

The invention relates to a parametric surface reconstruction method for false tooth discrete data. The method comprises the following steps: quickly reconstructing a triangular mesh model of a false tooth by utilizing a circumsphere criterion; mapping top points of the triangular mesh model of the false tooth to a unit square of a planar parameter domain in a one-to-one manner with a mean value coordinate parameterization method; according to an inverse mapping technology, mapping regular sampling points on the unit square of the planar parameter domain to the triangular mesh model; and obtaining regular sampling points of the triangular mesh model and obtaining a B-spline surface of the false tooth with a B-spline surface interpolation algorithm. According to the method, the oral repair cycle can be shortened and the pain of oral patients can be relieved.

A removing mechanism is disclosed for removing the bottom or top sheet from a stack of sheets; a delaying member for a delay of a predetermined time between the dispensing of two successive sheets; and an actuating mechanism for driving the removing mechanism, wherein the actuating mechanism is driven via a physically supplied mechanical drive force of an operator of the dispensing apparatus.

A light-emitting diode (LED) light source unit includes a printed circuit board mounting LED elements thereon. The LED elements are arranged in the form of an array and mounted on a bottom face of a straight groove defined in the printed circuit board by a groove forming technique. A lateral face of the groove acts as a reflecting face for reflecting beam from the LED elements toward an object to be illuminated.

The invention provides a concrete construction method for a curved roof, the concrete construction method for the curved roof comprises the following steps of a, installing a slide rail; b, assembling and installing a steel framework; c, adjusting the radian of the steel framework; d, installing a framework moving mechanism on the steel framework; e, installing a plate vibrator on an assembled steel framework; f, checking the framework moving mechanism; g, pouring concrete on roof after finishing the framework moving mechanism; h, lifting the steel framework integrally to the next pouring area through a tower crane, and repeating steps F and G for concrete pouring until the entire roof is poured; and removing the steel framework after the entire roof is poured and the concrete reaches certain strength. The concrete construction method of the curved roof solves the problems of forming difficulty in concrete pouring of the curved roof, the construction quality and curve surface accuracy of curved roof concrete slabs are improved, and it is effectively guaranteed that the design thickness of the curved roof concrete and the compactness of the concrete meet the design requirements.

A mechanism of vertical lathe for machining the curved surface on the top of piston is composed of vertical tool carrier, copying plate for said curved surface, linkage plate, power cylinder on said linkage plate, slide plate sliding up and down for installing tool carrier on it, and fulcrum with curved arm, lateral branch arm and lower branch arm.

A substrate for biochips with which immobilization is easy, which does not exhibit self-fluorescence, which is easy to manufacture, and which is excellent in flatness and surface precision, is disclosed. A substrate having a substrate body of the biochip, which is made of a metal, and a carbon layer having functional groups formed on the metal substrate body is used as a substrate for biochips. Since the substrate body of the substrate for biochips is made of a metal, the substrate is not only easy to manufacture, but also free from cracking and chipping, so that it allows easy handling, and high flatness and surface precision can be attained. Therefore, the problem that the optical system is hard to focus when detecting fluorescence does not occur. Moreover, since the substrate body is made of a metal, it does not emit fluorescence by itself. In addition, since the carbon layer has functional groups such as amino groups, biologically relevant substances can be easily immobilized.

The present application discloses a variable-diameter disc milling cutter hilt tool, and belongs to the field of mechanical processing technology. The tool includes a cutter head, machining cutter bars and a first locking mechanism, wherein the cutter head (1) includes a center cylinder (11) connected with a milling cutter hilt (5) and a plurality of mounting bosses (12) distributed on the circumferential side of the center cylinder (11); through holes are formed in each mounting boss (12); the axis of the through holes and the axis of the center cylinder (11) intersect at the surface where the cutter head (1) faces the milling cutter hilt (5); the machining cutter bars (4) are slidably arranged in the through holes; and the first locking mechanism is used for fixing the machining cutter bars after the machining cutter bars (4) are moved to a set position. The machining cutter bars slide along the oblique angle of the through holes; different radius values have different cutter tip heights; in this way, the layered cutting of the variable-diameter disc milling cutter head with different cutting depths during feeding per revolution can be realized; and the precision of machined surfaces is improved.