Abstract: Vertically superimposed lateral gate-all-around metal-oxide-semiconductor field-effect transistors are provided, a structure of a novel three-dimensional integrated circuit such as a CMOS logic circuit that is composed of the vertically superimposed lateral gate-all-around transistors, a random-access memory and the like, and a manufacturing method for the novel three-dimensional integrated circuit are provided. The manufacturing method for the vertically superimposed lateral gate-all-around transistors includes: first preparing a monolayer channel and a source/drain, then protected with a sacrificial layer; preparing an insulating isolation layer, preparing above repeated structures on the insulating isolation layer; preparing an insulating spacer layer between the source/drain and a gate of each of the layers, a gate oxide, a gate, and a source/drain electrode in a unified manner, and finally preparing a connecting wire connected to the outside.

Abstract: Provided are a magnetic random access memory device and a manufacturing method therefor. The device comprises magnetic thin film structure bodies, and an electrode arranged around side surfaces of the magnetic thin film structure body. The method is: preparing a bottom electrode, preparing a magnetic thin film structure body on the bottom electrode; preparing a non-magnetic thin film structure body on the magnetic thin film structure body, and preparing another magnetic thin film structure body on the non-magnetic thin film structure body; etching the two magnetic thin film structure bodies and the non-magnetic thin film structure body to form a MTJ device, preparing an insulating layer thin film on the outer surface of the device, and preparing a VCMA electrode on the periphery of the side face of the magnetic thin film structure body requiring voltage application; and preparing a wire connecting the VCMA electrode to outside.

Abstract: Provided is a method for manufacturing a base material powder having a carbon nanocoating layer, the method including adding a polycyclic aromatic hydrocarbon to a base material powder, heating the mixture to a temperature that is higher than or equal to the boiling point of the polycyclic aromatic hydrocarbon and is lower than or equal to the relevant boiling point temperature+300° C., and that is higher than or equal to the thermal decomposition temperature of the polycyclic aromatic hydrocarbon, and thereby coating the surface of the base material powder with a layer of carbon having a thickness of 0.1 nm to 10 nm.

Abstract: Provided is a method for manufacturing a base material powder having a carbon nanocoating layer, the method including adding a polycyclic aromatic hydrocarbon to a base material powder, heating the mixture to a temperature that is higher than or equal to the boiling point of the polycyclic aromatic hydrocarbon and is lower than or equal to the relevant boiling point temperature +300° C., and that is higher than or equal to the thermal decomposition temperature of the polycyclic aromatic hydrocarbon, and thereby coating the surface of the base material powder with a layer of carbon having a thickness of 0.1 nm to 10 nm.

Abstract: Provided are a method for manufacturing MgB2 superconductor by pressure molding a mixture of Mg powder or MgH2 powder and B powder and heat-treating the mixture, the method including (I) a step of adding a polycyclic aromatic hydrocarbon to the B powder, while heating the mixture to a temperature higher to or equal to the melting point of the polycyclic aromatic hydrocarbon at the time of this addition, and thereby covering the surface of the B powder with the polycyclic aromatic hydrocarbon; and (II) a step of mixing the B powder having the surface covered with the polycyclic aromatic hydrocarbon, with the Mg powder or the MgH2 powder, or a step of combining the B powder having the surface covered with the polycyclic aromatic hydrocarbon, with an Mg rod; and an MgB2 superconducting wire which has high critical current density (Jc) characteristics and less fluctuation in the critical current density (Jc).

Abstract: Provided are a method for manufacturing MgB2 superconductor by pressure molding a mixture of Mg powder or MgH2 powder and B powder and heat-treating the mixture, the method including (I) a step of adding a polycyclic aromatic hydrocarbon to the B powder, while heating the mixture to a temperature higher to or equal to the melting point of the polycyclic aromatic hydrocarbon at the time of this addition, and thereby covering the surface of the B powder with the polycyclic aromatic hydrocarbon; and (II) a step of mixing the B powder having the surface covered with the polycyclic aromatic hydrocarbon, with the Mg powder or the MgH2 powder, or a step of combining the B powder having the surface covered with the polycyclic aromatic hydrocarbon, with an Mg rod; and an MgB2 superconducting wire which has high critical current density (Jc) characteristics and less fluctuation in the critical current density (Jc).