Tantalum capacitor

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

Capacitor of semiconductor device and method for manufacturing the same

Abstract: Provided is a capacitor of a semiconductor device. The capacitor includes a capacitor lower electrode disposed on a semiconductor substrate. A first dielectric layer comprising aluminum oxide (Al 2 O 3 ) is disposed on the capacitor lower electrode. A second dielectric layer comprising a material having a higher dielectric constant than that of aluminum oxide is disposed on the first dielectric layer. A third dielectric layer comprising aluminum oxide is disposed on the second dielectric layer. A capacitor upper electrode is disposed on the third dielectric layer. The capacitor of the present invention can improve electrical properties. Thus, power consumption can be reduced and capacitance per unit area is high enough to achieve high integration.

Leakage behavior and reliability assessment of tantalum oxide dielectric MIM capacitors

Abstract: Reliability assessment was used extensively during the development of allow leakage tantalum oxide MIM (metal-insulator-metal) capacitor targeted for a Cu-based wireless integrated circuit platform. Leakage of the MIM capacitor as a function of process conditions and lifetime behavior under both DC and AC stressing is presented.

An Experimental Technique for Estimating the ESR and Reactance Intrinsic Values of Aluminum Electrolytic Capacitors

Abstract: This paper presents an experimental technique that allows the determination of the reactance and ESR intrinsic values of aluminum electrolytic capacitors. The equivalent circuit of an electrolytic capacitor comprises an equivalent series inductance (ESL), an equivalent series resistance (ESR) and a capacitance (C), whose values change with frequency. Therefore, the behavior of an electrolytic capacitor varies from approximately a simple capacitor for low frequencies, to a resistor at its resonance frequency, and finally to an inductor for frequencies higher than its resonance frequency. The knowledge of the resonance frequency of the electrolytic capacitors, as well as their equivalent circuit at the operating frequency becomes of paramount importance for designing purposes. The ESR is one of the most critical problems of static converters that operate near the resonance frequency of the electrolytic capacitors. An increased ESR value leads to a significant increase in the alternate component of the output voltage, requiring a constant action of the control system. To validate the proposed technique and to demonstrate its applicability some experimental and simulated results are presented.

Solid electrolytic capacitor and method of fabricating the same

Abstract: A solid electrolytic capacitor minimized in both equivalent serial resistance (ESR) and equivalent serial inductance (ESI) by eliminating redundant space created by its electrode is presented. The solid electrolytic capacitor includes a capacitor element including mainly of a positive electrode body, having a positive electrode lead embedded therein, and made of any form of a valve metal, such as a net, a sheet, a foil, and modifications thereof with a rough surface; a positive electrode terminal connected to the positive electrode lead; a negative electrode terminal connected to a negative electrode layer; and a housing resin coated by molding. This improves the installation efficiency of the capacitor element, and contributes to the small, thin structure of the solid electrolytic capacitor.

High voltage and high efficiency polymer electrolytic capacitors

Abstract: A capacitor, and method of making a capacitor, is provided wherein the capacitor has exceptionally high break down voltage. The capacitor has a tantalum anode with an anode wire attached there to. A dielectric film is on the tantalum anode. A conductive polymer is on the dielectric film. An anode lead is in electrical contact with the anode wire. A cathode lead is in electrical contact with the conductive polymer and the capacitor has a break down voltage of at least 60 V.