摘要:
It is possible to provide an electron emission cathode, an electron emission source having a high-luminance and narrow energy width by using diamond and an electronic device using them. The diamond electron discharge cathode has a monocrystal diamond at least at a part of it. The diamond electron emission cathode has a columnar shape including a sharpened section and a heating section. The sharpened section has an electron emission section. The electron emission section and the heating section are formed by diamond semiconductor, which is formed by a p-type semiconductor containing 2×1015 cm−3 of p-type impurities or above. The electron emission section has the semiconductor. A metal layer is formed on the surface of the electron emission cathode. The metal layer exists at least at a part of the heating section. The distance from the electron emission section to the position nearest to the end of the metal layer is 500 μm. A pair of current introduction terminals supplies current to the heating section to heat the heating section. A part of the introduced electrons is emitted from the electron emission section.
摘要:
A single crystal diamond grown by vapor phase synthesis, wherein when one main surface is irradiated with a linearly polarized light considered to be the synthesis of two mutually perpendicular linearly polarized light beams, the phase difference between the two mutually perpendicular linearly polarized light beams exiting another main surface on the opposite side is, at a maximum, not more than 50 nm per 100 μm of crystal thickness over the entire crystal. This single crystal diamond is of a large size and high quality unattainable up to now, and has characteristics that are extremely desirable in semiconductor device substrates and are applied to optical components of which low strain is required.
摘要:
A single crystal diamond grown by vapor phase synthesis, wherein when one main surface is irradiated with a linearly polarized light considered to be the synthesis of two mutually perpendicular linearly polarized light beams, the phase difference between the two mutually perpendicular linearly polarized light beams exiting another main surface on the opposite side is, at a maximum, not more than 50 nm per 100 μm of crystal thickness over the entire crystal. This single crystal diamond is of a large size and high quality unattainable up to now, and has characteristics that are extremely desirable in semiconductor device substrates and are applied to optical components of which low strain is required.
摘要:
A diamond single crystal composite substrate which are constructed from a plurality of diamond single crystal substrates with uniform plane orientations disposed side by side and integrated overall by growing diamond single crystals thereon by vapor phase synthesis, in which the deviation of the plane orientation of the main plane of each of said plurality of diamond single crystal substrates, excluding one diamond single crystal substrate, from the {100} plane is less than 1 degree, the deviation of the plane orientation of the main plane of the excluded one substrate from the {100} plane is 1 to 8 degrees, said one diamond single crystal substrate is disposed in the outermost circumferential part when the diamond single crystal substrates are disposed side by side, and is disposed so that the direction in the main plane of said one substrate faces in the outer circumferential direction of the disposed substrates, and diamond single crystals are then grown by vapor phase synthesis so that the diamond single crystal grown from said one diamond single substrate is caused to cover the diamond single crystals grown on the other substrates, to achieve an overall integration.
摘要:
The present invention provides an analytical model preparing apparatus which reduces the user's labor of template selecting operation by selecting and presenting an appropriate template from among a plurality of already prepared templates. The analytical model preparing apparatus of the invention comprises means for entering a shape model to be analyzed; a database which associates at least one already prepared shape model with the analytical model prepared for such an already prepared shape model, and registers the same; means for collating the above-mentioned shape model to be analyzed with at least one already prepared shape model; analytical model preparing means for preparing at least one analytical model corresponding to the shape model to be analyzed, by use of analytical model preparing information prepared for the above-mentioned already prepared shape model, in accordance with the result of collation; and mesh quality evaluating means for calculating a mesh quality evaluation value for the analytical model corresponding to at least one prepared shape model to be analyzed.
摘要:
The object of the present invention is to obtain a high quality single crystalline diamond that has less distortion and large area suitable for semiconductor device substrates or an optical component material. The present invention is a single crystalline diamond produced by chemical vapor deposition, wherein, when a linear polarized light which is composed of two linear polarized lights perpendicular to each other is introduced into one main face of the single crystalline diamond, a maximum value of a retardation between the two linear polarized lights perpendicular to each other which come out from an opposite main face is not more than 50 μm at maximum per a thickness of 100 μm across an entire of the single crystalline diamond, and also a method for producing the diamond.
摘要:
A method of fabricating a heatsink including a substrate of a sintered compact containing Cu and W, and a thin diamond film layer formed on the surface of the substrate with good adherence, involves immersing the substrate in acid to reduce the Cu content of a surface region thereof and to roughen exposed W at that surface region, and then forming the thin diamond film layer on that surface region by vapor synthesis. Alternatively, a thin diamond film layer is formed on a surface of a porous body substrate, and then a hole in the porous body substrate is filled with Cu.
摘要:
A thin diamond film layer is formed on a substrate with good adherence. A heatsink includes a substrate of a sintered compact including Cu and W, and a thin diamond film layer formed on the surface of the substrate. The Cu content in the substrate is at least 5% by weight. In an X-ray diffraction chart obtained by irradiating the thin diamond film layer with an X-ray, the diffraction peak intensity of the (110) plane of W is at least 100 times the diffraction peak intensity of the (200) plane of Cu.
摘要:
An object of the invention is to provide a window for an optical use having excellent transmission property over a wide range of from infra-red to vacuum ultraviolet as well as excellent baking resistance and capable of being fitted to an ultra-high vacuum apparatus and a process for the production of the same.This object can be attained by a window for an optical use comprising a diamond as a window material, a flange for a vacuum apparatus, a frame for bonding the diamond to the flange and the specified adhesive material for bonding the frame and diamond, and a process for the production of the window for an optical use comprising a step of preparing a diamond plate, a step of fitting a frame to a flange and bonding the diamond plate to the frame through an adhesive material. The benefits can be enlarged by suitably selecting the shape, material, etc. of the frame.
摘要:
Several embodiments of air-liquid cooled internal combustion engines for powering vehicles such as motor scooters. In each embodiment, the engine is provided with a finned cylinder for air cooling and a cylinder head having a liquid cooling jacket for water cooling. A radiator is provided for exchanging heat from the cylinder head cooling jacket and the atmosphere and a single fan circulates cooling air across both the radiator and the cylinder. In all embodiments, the flow across the fan, radiator and cylinder is in a series flow fashion. In many of the embodiments, the components are axially aligned. The fan is driven by the crankshaft either directly, through a gear train or through a flexible transmitter and in one case this flexible transmitter also drives the camshaft. A water pump is driven off of the camshaft for the liquid cooling system.