Abstract: The present invention relates to an insulating gas used for electrical insulation or arc extinguishing of an electrical device, and an electrical device for insulating electricity using the same. The insulating gas of the present invention, which may replace SF6 gas, consists of a mixed gas of trifluoromethyl trifluorovinyl ether (CF3OCFCF2) and a carrier gas. The insulating gas of the present invention has the characteristics of a low boiling point, high dielectric strength, low toxicity, and a low global warming potential (GWP=1 or less), and thus may replace SF6, and the low global warming potential with no loss of high insulating capacity and arc extinguishing capability may reduce greenhouse gases.

Abstract: In one example, a semiconductor device can comprise a substrate, a device stack, first and second internal interconnects, and an encapsulant. The substrate can comprise a first and second substrate sides opposite each other, a substrate outer sidewall between the first substrate side and the second substrate side, and a substrate inner sidewall defining a cavity between the first substrate side and the second substrate side. The device stack can be in the cavity and can comprise a first electronic device, and a second electronic device stacked on the first electronic device. The first internal interconnect can be coupled to the substrate and the device stack. The encapsulant can cover the substrate inner sidewall and the device stack and can fill the cavity. Other examples and related methods are disclosed herein.

Abstract: The present invention relates to a composition for forming a composite polymer film, a method for preparing the composition for forming a composite polymer film, a composite polymer film and a method for preparing the composite polymer film. The composition for forming a composite polymer film comprises: a fluorine-based polymer solution comprising a fluorine-based polymer; and polyvinylidene fluoride nanoparticles dispersed in the fluorine-based polymer solution. The method for preparing the composition for forming a composite polymer film comprises the steps of: preparing a fluorine-based polymer solution comprising a fluorine-based polymer; and dispersing polyvinylidene fluoride nanoparticles in the fluorine-based polymer solution. The composite polymer film comprises: a polymer matrix formed from a fluorine-based polymer; and polyvinylidene fluoride nanoparticles dispersed in the polymer matrix.

Abstract: A coated steel sheet capable of implementing a rich three-dimensional effect, various patterns, and a natural esthetic sense and includes a steel sheet material which has a concave portion and a convex portion formed on one surface and a coating layer which is formed on the one surface by being coated on a coating material, wherein, as the coating layer is polished, at least a portion of the convex portion is exposed to an outside, and the concave portion is filled with the coating material.

Abstract: The present invention relates to an apparatus for grinding a surface of a steel sheet, the apparatus comprising: a conveyor for transferring a steel sheet; and a grinding means, which is coupled above the conveyor such that the grinding means can be rotated about a direction perpendicular to the conveyor as an axis, and which grinds the surface of the steel sheet, wherein the angle at which the steel sheet is ground is adjusted by rotation. Through the above configuration, as the grinding means is rotatably coupled to the conveyor, it is possible to grind various patterns on the surface of the steel sheet by adjusting the grinding angle through the rotation of the grinding means.