Topic
Tantalum capacitor
About: Tantalum capacitor is a research topic. Over the lifetime, 2432 publications have been published within this topic receiving 26709 citations.
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Patent•
19 Jul 1991
TL;DR: In this paper, a lower electrode composed of an oxide conductor, barrier metal, and metallic electrode, and a dielectric layer 14, and an upper electrode 15, was used for dry etching.
Abstract: PURPOSE:To easily manufacture a capacitor for storage by dry etching without lowering the capacitance of the capacitor by constituting the capacitor of a dielectric layer and lower and upper electrodes on both sides of the dielectric layer and using an oxide conductor for the lower electrode. CONSTITUTION:This capacitor for storage is constituted of a lower electrode composed of an oxide conductor 13, barrier metal 11, and metallic electrode 12, dielectric layer 14, and upper electrode 15. Some capacitors do not contain the barrier metal 11 and metallic electrode 12. The oxide conductor 13 can be formed of, for example, ZnO, SnO2, SrVO3, etc. The dielectric layer 14 can be formed of, for example, such a ferroelectric substance as PLZT, PZT, etc., or a material having a high dielectric constant, such as Ta2O5, etc. Therefore even when the ferroelectric material is formed at a 60 deg.C at the time of manufacturing this capacitor, the capacitance of the capacitor does not drop, since the lower electrode is not oxidized and no low-permittivity layer is formed.
9 citations
Patent•
13 Dec 1996
TL;DR: A combination of static voltage and sweep voltage tests performed on capacitor grade powders gives a valid prediction of performance of eventual solid electrolyte capacitors incorporating such powders as discussed by the authors. But this test was performed on a single capacitor.
Abstract: A combination of static voltage and sweep voltage tests performed on capacitor grade powders gives a valid prediction of performance of eventual solid electrolyte capacitors incorporating such powders.
9 citations
Patent•
08 Jan 2008TL;DR: In this paper, the authors describe a capacitor structure with variable capacitance, having at least one capacitor (1), having at most one opposing capacitor electrode (2), and at most two actuators (3, 4, 5, 6, 7, 8).
Abstract: The invention relates to a capacitor structure (1) with a variable capacitance, having at least one capacitor (101) with at least one capacitor electrode (5a, 5e), at least one opposing capacitor electrode (10a) which is arranged at a variable capacitor electrode separation (102) from the capacitor electrode (5a, 5e), and at least one actuator (103) for varying the capacitor electrode separation (102), having at least one actuator electrode (10b) for electrical actuation of the actuator by means of which the capacitor electrode separation is varied. The capacitor structure is characterized in that the actuator electrode and one of the capacitor electrodes of the capacitor are arranged alongside one another on a common mount (8). The actuator electrode and the capacitor electrode which is arranged alongside the actuator electrode are advantageously electrically isolated from one another. The actuation circuit and the function circuit are therefore decoupled. The actuator is advantageously a piezoceramic bending transducer. The capacitor structure is used, for example, in a voltage controlled oscillator (VCO). The capacitor structure is used in particular for telecommunications and mobile radio technology. The capacitor structure provides a basic module for the concept of “software defined radio” (SDR).
9 citations
Patent•
11 Jun 1968TL;DR: In this article, the effective surface area of the titanium or nickel cathodic casing of a liquid or gel electrolytic porous anode capacitor is increased by depositing a layer 10 of ruthenium on the inner surface thereof.
Abstract: 1,254,633. Electrolytic capacitors. GENERAL ELECTRIC CO. 23 April, 1969 [11 June, 1968], No. 20837/69. Heading H1M. The effective surface area of the titanium or nickel cathodic casing 2 of a liquid or gel electrolytic porous anode capacitor is increased by depositing a layer 10 of ruthenium on the inner surface thereof. Casing 2 is closed by glassmetal seal structure 11. A porous ruthenium layer is applied by heat deposition from ruthenium trichloride solution on to the previously etched surface.
9 citations