摘要:
An aluminum nitride ceramic is provided, including 0.5 to 10 weight percent of boron atoms and 0.1 to 2.5 weight percent of carbon atoms. The ceramic has a room temperature volume resistivity not lower than 1×1014Ω·cm, and a volume resistivity at 500° C. of not lower than 1×108Ω·cm. An a-axis lattice constant of the aluminum nitride in the ceramic is not shorter than 3.112 angstrom and a c-axis lattice constant of the aluminum nitride is not shorter than 4.980 angstrom.
摘要:
An aluminum nitride sintered body containing carbon fibers is provided. This aluminum nitride sintered body is obtained by mixing carbon fibers and aluminum nitride together to form mixed powder, molding the mixed powder to form a compact, and heating and sintering the compact in any of a vacuum atmosphere, an inert atmosphere and a reductive atmosphere. By using electric conductivity and shapes with high aspect ratios of the carbon fibers, continuous electrically conductive paths are formed with a small content of the carbon fibers. In this way, a value of resistance of the aluminum nitride sintered body is reduced.
摘要:
An apparatus for plasma treatment contains a process vessel provided with a mounting table for mounting a substrate, a first gas supplying unit configured to supply a first gas into the process vessel, a first plasma generating unit configured to convert at least a part of the first gas to a first plasma, a second gas supplying unit configured to supply a second gas into the process vessel, and a second plasma generating unit configured to convert at least a part of the second gas to a second plasma. A height of ea an inlet of the second gas from the mounting table is lower than a height of an inlet of the first gas from the mounting table.
摘要:
A film deposition apparatus which comprises: a processing chamber having a space inside which serves as a vacuum space to which a film deposition gas is supplied; a substrate supporting unit which is disposed in the vacuum space and supports a substrate; a coil which inductively heats the substrate supporting unit to thereby form a film from the film deposition gas on the substrate and which has been divided into regions; and a coil control unit which controls the coil region by region.
摘要:
A conductive channel formed of an (Sm, Ce)Al11O18 is interconnected in grain boundaries of aluminum nitride (AlN) particles, thereby reducing the temperature dependency of the volume resistivity of an AlN sintered body formed therefrom. At the same time, a solid solution of the AlN particles is formed with at least one of C and Mg, to prevent the conductive channel from moving into the AlN particles, thereby maintaining a high volume resistivity within the AlN particles even at a high temperature.
摘要翻译:由(Sm,Ce)Al 11 O 18形成的导电沟道在氮化铝(AlN)颗粒的晶界处相互连接,从而降低了由其形成的AlN烧结体的体积电阻率的温度依赖性。 同时,用C和Mg中的至少一种形成AlN颗粒的固溶体,以防止导电通道移动到AlN颗粒中,从而即使在高温下也保持AlN颗粒内的高体积电阻率 。
摘要:
An aluminum nitride-based ceramic sintered body is provided, which is manufactured by sintering an aluminum nitride powder comprising aluminum nitride as a main component, carbon in an amount of 0.1 wt % or more to 1.0 wt % or less, and containing oxygen in an amount that is not greater than 0.7 wt %, wherein carbon and oxygen are dissolved in grains of the aluminum nitride powder. The a-axis length of the lattice constant of the aluminum nitride is in a range of 3.1120 Å or more to 3.1200 Å or less, and the a c-axis length of the lattice constant is in a range of 4.9810 Å or more to 4.9900 Å or less. The volume resistivity of the aluminum nitride-based ceramic sintered body at 500° C. is 109 Ω·cm or more.
摘要:
A material with a low volume resistivity at room temperature composed of an aluminum nitride sintered body is provided. The sintered body contains samarium in a converted content calculated as samarium oxide of not lower than 0.04 mole percent. The sintered body contains an aluminum nitride phase and a samarium-aluminum complex oxide phase. The samarium-aluminum complex oxide phase forms intergranular layers with a low resistivity along the intergranular phase between aluminum nitride grains.
摘要:
A heat treatment is performed in a hydrogen-gas containing atmosphere. A high-purity inert gas having a water content of not more than 2.57 ppm is used as a substitution gas for replacing a wafer-input air atmosphere and for replacing the hydrogen-gas containing atmosphere after the heat treatment.
摘要:
A vertical boat for holding a plurality of semiconductor wafers comprising two end members (2) positioned at the top and the bottom of the vertical boat, and a plurality of support members (3,4,5,6,104) vertically mounted on the end members (2) for supporting the wafers, wherein each support member (3,4,5,6,104) is formed by a plate-like member having a series of slits (9,10,7,8,108) formed thereon in such a manner that a plurality of support arms are defined by the slits (9,10,7,8,108) at a predetermined interval, each support arm having a support projection (11,12,13,14,112) formed at the end thereof, and wherein the inner portions (P) of the wafer (1) is to be supported by the support projections (11,12,13,14,112) whereas the periphery of the wafer (1) does not contact the arms of the support members (3,4,5,6,104). The slits can be formed in two steps: forming a series of first slit portions on the plate-like member at a predetermined interval so as to retain two side walls of the plate-like member; and forming a series of second small slit portions on one of the side walls at the same interval so as to connect each second slit portion to the corresponding first slit portion.
摘要:
Derivatives of ML-236B carboxylic acid, its salts and esters and corresponding lactone have a hydroxy group at the 3"-position and optionally also at the 6'-position. These derivatives may be prepared by the enzymatic hydroxylation of a corresponding ML-236B compound employing an enzyme produced by a microorganism of the genus Streptomyces or Amycolata, especially Streptomyces sp. SANK 62285, Streptomyces sp. SANK 62385, Streptomyces sp. SANK 62485, Streptomyces sp. SANK 62585, Amycolata autotrophica SANK 62781, Amycolata autotrophica subsp. canberrica SANK 62882 or Amycolata autotrophica subsp. amethystina SANK 62981. These derivatives have the ability to inhibit cholesterol biosynthesis.