Tantalum capacitor

About: Tantalum capacitor is a research topic. Over the lifetime, 2432 publications have been published within this topic receiving 26709 citations.

Fireset for a low energy exploding foil initiator: SCR driven MOSFET switch

Abstract: A fireset for a low energy exploding foil initiator (LEEFI) comprises a first capacitor for storing a level of electrical energy sufficient to fire the LEEFI, the first capacitor being in electrical communication with the LEEFI, second and third capacitors in electrical communication with the first capacitor for storing lesser levels of energy than is stored by the first capacitor, a diode in electrical communication with the capacitors for limiting charging of the second and third capacitors, and first and second resistors providing isolation among the capacitors. A trigger directs a pulse of electrical energy to a high speed switching transistor adapted to receive the pulse from the trigger and, in response there to, to dump the third capacitor. The third capacitor dumps through a silicone controlled rectifier to short the second capacitor to ground, to decrease the level of energy stored by the second capacitor. A metal oxide semi-conductor field effect transistor (MOSFET) is adapted to be turned on by energy from the second capacitor. The second capacitor discharges into a gate portion of the second MOSFET to turn on the second MOSFET and thereby dump the first capacitor to fire the LEEFI.

Hybrid super capacitor using composite electrode

Abstract: Provided is a hybrid super capacitor using a composite electrode that may enhance equivalent series resistance (ESR) using a carbon nanotube chain. The hybrid super capacitor includes: an anode 11 including an anode oxide layer 11 a and an activated carbon layer applied 11 b on the anode oxide layer 11 a; and a cathode 21 being disposed to face the anode 11. The cathode 21 may include a silicon oxide layer 21 a, a lithium titanium oxide layer 21 b disposed on the silicon oxide layer 21 a, and a carbon nanotube chain CT formed to pass through the silicon oxide layer 21 a and the lithium titanium oxide layer 21 b to thereby be electrically connected to each other, thereby enhancing ESR and expanding an output density and a lifespan of the hybrid super capacitor.

Formed substrate used for solid electrolytic capacitor, production method thereof and solid electrolytic capacitor using the substrate

Abstract: A formed substrate, wherein the surface of the valve-acting metal having a dielectric film is at least partially covered with an oxide comprising Si, valve-acting metal element and oxygen, preferably, wherein the content of Si in the formed foil having an aluminum oxide dielectric film decreases continuously from the surface of the dielectric film toward the inner part in some regions in the aluminum dielectric film thickness; a method for producing the formed substrate; and a solid electrolytic capacitor comprising a solid electrolyte on the formed substrate. A solid electrolytic capacitor manufactured by using a formed substrate according to the present invention, improved in adhesion to an electrically conducting polymer (solid electrolyte) with its area coverage contacting the polymer being sufficiently large, is increased in the electrostatic capacitance among individual capacitors and improved in the LC yield as compared with capacitors otherwise manufactured.

Method of making solid electrolytic capacitor having oxidized anode wire

Abstract: A solid electrolyte capacitor includes a capacitor element, an anode lead, and a cathode lead. The capacitor element includes a capacitor chip, an anode wire projecting from the capacitor chip, and a cathode electrode formed on outer surfaces of the capacitor chip. The anode lead is electrically connected to the anode wire, whereas the cathode lead is electrically connected to the cathode electrode. A method for making such a solid electrolyte capacitor includes a laser irradiation step for irradiating the anode wire with a laser beam, and a connection step for connecting the anode wire with the anode lead after the laser irradiation step.

Dielectric properties of BaTiO3/epoxy composites by lamination process for embedded capacitor application

Abstract: Because of the fabricability of polymer and excellent dielectric properties of ceramics, ceramic-polymer composites have been investigated widely for embedded capacitors which can improve electric performance greatly. In order to obtain further application of composite, the embedded capacitors with three-layer sandwich structure containing the BaTiO3/epoxy composites as dielectric layer and copper foil as electrodes were fabricated. The dielectric properties are improved by preventing the defect in dielectric layer through lamination process. Our results show that the capacitors exhibit high dielectric permittivity (e = 20), low dielectric loss (0.01) at 103 Hz from 40 to 100 °C and high breakdown strength (24 kV/mm), which indicate that the lamination is a promising process for embedded capacitor fabrication and BaTiO3/epoxy composites have potential for high-performance embedded capacitors application in field of microelectronics.