摘要:
The present invention provides a method of more efficiently producing a semiconductor epitaxial wafer, which can suppress metal contamination by achieving higher gettering capability.A method of producing a semiconductor epitaxial wafer 100 according to the present invention includes a first step of irradiating a semiconductor wafer 10 with cluster ions 16 to form a modifying layer 18 formed from a constituent element of the cluster ions 16 in a surface portion 10A of the semiconductor wafer; and a second step of forming an epitaxial layer 20 on the modifying layer 18 of the semiconductor wafer 10.
摘要:
The present invention provides a method of more efficiently producing a semiconductor epitaxial wafer, which can suppress metal contamination by achieving higher gettering capability.A method of producing a semiconductor epitaxial wafer 100 according to the present invention includes a first step of irradiating a semiconductor wafer 10 with cluster ions 16 to form a modifying layer 18 formed from a constituent element of the cluster ions 16 in a surface portion 10A of the semiconductor wafer; and a second step of forming an epitaxial layer 20 on the modifying layer 18 of the semiconductor wafer 10.
摘要:
The present invention provides a method of producing a semiconductor epitaxial wafer, which can suppress metal contamination by achieving higher gettering capability.The method of producing a semiconductor epitaxial wafer includes a first step of irradiating a surface portion 10A of a semiconductor wafer 10 with cluster ions 16 thereby forming a modifying layer 18 formed from carbon and a dopant element contained as a solid solution that are constituent elements of the cluster ions 16, in the surface portion 10A of the semiconductor wafer; and a second step of forming an epitaxial layer 20 on the modifying layer 18 of the semiconductor wafer, the epitaxial layer 20 having a dopant element concentration lower than the peak concentration of the dopant element in the modifying layer 18.
摘要:
It is an object of the present invention to provide a novel sterilization method capable of killing not only microorganisms in water, but also microorganisms in a gas. Specifically, the present invention provide a method for sterilizing a gas or liquid, comprising contacting a microorganism in a gas or liquid with a material containing an amorphous carbon having a sulfo group introduced therein.
摘要:
An exhaust gas oxidation catalyst characterized as an exhaust gas oxidation catalyst comprising a catalyst substrate, wherein a plurality of exhaust gas channels has been formed, and a catalyst layer formed on the surface of the exhaust gas channels in the catalyst substrate; wherein a catalyst layer consisting of a bottom catalyst layer, a top catalyst layer exposed within the exhaust gas channels, and an intermediate catalyst layer located between the bottom catalyst layer and top catalyst layer, is provided so as to cover not less than 25% of the exhaust gas channel surface, and wherein the bottom catalyst layer contains at least an oxygen-occluding agent as catalyst component but does not contain a hydrocarbon adsorbent, the intermediate catalyst layer contains at least catalyst metal, supported on a metal oxide support, and a hydrocarbon adsorbent as catalyst components, and the top catalyst layer contains at least an oxygen-occluding agent and a hydrocarbon adsorbent as catalyst components.
摘要:
A paper sheet supplying apparatus comprises a transfer guide unit, a register unit and a paper sheet sending-out unit. The supplying apparatus supplies a paper sheet through the transfer guide unit to the register unit from the paper sheet sending-out unit. The guide unit has a straight portion and a curved portion, and guides the paper sheet from the sending-out unit to the register unit. An inwardly indented curved surface of the curved portion, on which the paper sheet is in contact, has a plurality of ribs separated from each other. Not more than three ribs of the plurality of ribs are arranged in a center region of the curved surface in the transfer direction, and the remaining ribs of the plurality of ribs are arranged in each side region located proximate the center region. Each of the ribs in the center region has a first height, and each rib in each side region has a height which is smaller than the first height.
摘要:
It is an object of the present invention to provide a novel sterilization method capable of killing not only microorganisms in water, but also microorganisms in a gas. Specifically, the present invention provide a method for sterilizing a gas or liquid, comprising contacting a microorganism in a gas or liquid with a material containing an amorphous carbon having a sulfo group introduced therein.
摘要:
An exhaust gas oxidation catalyst characterised as an exhaust gas oxidation catalyst comprising a catalyst substrate, wherein a plurality of exhaust gas channels has been formed, and a catalyst layer formed on the surface of the exhaust gas channels in the catalyst substrate; wherein a catalyst layer consisting of a bottom catalyst layer, a top catalyst layer exposed within the exhaust gas channels, and an intermediate catalyst layer located between the bottom catalyst layer and top catalyst layer, is provided so as to cover not less than 25% of the exhaust gas channel surface, and wherein the bottom catalyst layer contains at least an oxygen-occluding agent as catalyst component but does not contain a hydrocarbon adsorbent, the intermediate catalyst layer contains at least catalyst metal, supported on a metal oxide support, and a hydrocarbon adsorbent as catalyst components, and the top catalyst layer contains at least an oxygen-occluding agent and a hydrocarbon adsorbent as catalyst components.