Abstract: A heat conductor includes a base including a forest of carbon nanotubes, a first solder layer on a first surface of the base, and a second solder layer on a second surface of the base opposite from the first surface. The second solder layer is electrically connected to the first solder layer via the carbon nanotubes.

Abstract: A substrate includes a heat conduction member including a plurality of carbon nanotubes, a first resin layer provided on first ends of the plurality of carbon nanotubes, and a second resin layer provided on second ends of the plurality of carbon nanotubes, the second ends being opposite the first ends, a first metal layer laminated on the first resin layer, and a second metal layer laminated on the second resin layer, wherein neither the first resin layer nor the second resin layer contains a filler, and wherein spaces between the first ends of the plurality of carbon nanotubes are filled with a resin constituting the first resin layer, and spaces between the second ends of the plurality of carbon nanotubes are filled with a resin constituting the second resin layer.

Abstract: A heat conductor includes a first resin layer and a second resin layer each free of a filler, multiple carbon nanotubes extending between the first resin layer and the second resin layer, a first heat transfer layer, and a second heat transfer layer. The first heat transfer layer is on the first resin layer on the side opposite from the carbon nanotubes and has a thermal conductivity higher than the thermal conductivity of the first resin layer. The second heat transfer layer is on the second resin layer on the side opposite from the carbon nanotubes and has a thermal conductivity higher than the thermal conductivity of the second resin layer. The carbon nanotubes have respective first end portions embedded in first resin constituting the first resin layer and have respective second end portions embedded in second resin constituting the second resin layer.

Abstract: The present invention prevents from occurring a measurement error of electrical capacitance based on variance of a voltage applied to capacitors. An apparatus of measuring capacitance has a power supply for applying a voltage to capacitors, a voltmeter of measuring the voltage applied to the capacitors W, and an amperemeter of measuring a current flowing through the capacitors. A capacitance measuring part is connected to the voltmeter and the amperemeter, and measures electrical capacitance and electrical positive electrode of the capacitors based on the voltage and the current applied to the capacitor. A determining part determines whether or not the voltage deflects from the voltage between upper-limit and lower-limit values. When the determining part determines that the voltage changes, the warning part performs warning.