摘要:
A susceptor is provided in which wasteful space is minimized in the outermost peripheral portion and the maximum number of recesses are disposed, by modifying a recess arrangement of an outermost peripheral recess array, which is disposed on an outer peripheral portion of a plurality of recess arrays that are disposed in a closest packed arrangement in a honeycomb-shaped pattern structure. Each of recesses located at vertices of a second recess array (A2), which is the outermost periphery of concentric hexagonal recess arrays (A1) and (A2) in a honeycomb-shaped pattern, is substantially in point contact with two recesses forming the outermost peripheral recess array (A3), and those two recesses are substantially in point contact with each other. The same number of recesses as the number of the recesses disposed between a vertex (B2) and a vertex (B1) of the recess array (A2) are disposed between a recess (M(3)-C) and a recess (M(3)-B) of the outermost peripheral recess array (A3), and the same number of recesses as the number of the recesses disposed between the vertex (B2) and a vertex (B3) of the recess array (A2) are disposed between a recess (M(3)-D) and a recess (M(3)-E) of the outermost peripheral recess array (A3).
摘要:
A porous carbon that has an extremely high specific surface area while being crystalline, and a method of manufacturing the porous carbon are provided. A porous carbon has mesopores 4 and a carbonaceous wall 3 constituting an outer wall of the mesopores 4, wherein the carbonaceous wall 3 has a portion forming a layered structure. The porous carbon is fabricated by mixing a polyamic acid resin 1 as a carbon precursor with magnesium oxide 2 as template particles; heat-treating the mixture in a nitrogen atmosphere at 1000°C for 1 hour to cause the polyamic acid resin to undergo heat decomposition; washing the resultant sample with a sulfuric acid solution at a concentration of 1 mol/L to dissolve MgO away; and heat-treating the noncrystalline porous carbon in a nitrogen atmosphere at 2500°C.
摘要:
The invention provides a CVD apparatus that can remarkably improve the quality and productivity of a susceptor provided with a film such as a SiC film or a TaC film without causing increase in production cost or increase in size of the apparatus. The invention also provides a method of manufacturing a susceptor using the CVD apparatus and a susceptor. A masking portion (recessed portion) 20 is provided at the center of a rear surface of a carbonaceous substrate 10. The masking portion 20 includes a first bore portion 20a and a second bore portion 20b. The first bore portion 20a has an inner wall in which a female screw portion 21 is formed. A male screw portion 7a of a masking jig 7 is screw-fitted to the female screw portion 21. The masking jig 7 is fixed to a film forming jig 2. The carbonaceous substrate is thus supported in a standing posture, and the carbonaceous substrate is provided, on a surface, with a film such as a SiC film or a TaC film except for the recessed portion by introducing gas into the apparatus in this supported state.
摘要:
A processing space is provided in a reaction container. One gas inlet port is provided at the lower end of the reaction container. A distribution plate is attached to the one gas inlet port. Another gas inlet port is provided at a lower side surface of the reaction container. Powder that is an object to be processed is stored on the distribution plate in the reaction container. The distribution plate is configured to let a gas pass and not let the powder pass. A nitrogen gas is introduced into the processing space through the distribution plate from the one gas inlet port, and a processing gas is introduced into the processing space from the other gas inlet port without passing through the distribution plate.
摘要:
A porous carbon that has an extremely high specific surface area while being crystalline, and a method of manufacturing the porous carbon are provided. A porous carbon has mesopores 4 and a carbonaceous wall 3 constituting an outer wall of the mesopores 4, wherein the carbonaceous wall 3 has a portion forming a layered structure. The porous carbon is fabricated by mixing a polyamic acid resin 1 as a carbon precursor with magnesium oxide 2 as template particles; heat-treating the mixture in a nitrogen atmosphere at 1000°C for 1 hour to cause the polyamic acid resin to undergo heat decomposition; washing the resultant sample with a sulfuric acid solution at a concentration of 1 mol/L to dissolve MgO away; and heat-treating the noncrystalline porous carbon in a nitrogen atmosphere at 2500°C.