Tantalum capacitor

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

Aluminum material for electrolytic capacitor electrode, production method of electrode material for electrolytic capacitor, anode material for aluminum electrolytic capacitor, and aluminum electrolytic capacitor

Abstract: An aluminum material for electrolytic capacitor electrodes, wherein, in an alloy composition, the aluminum material contains Ga: 0.0005 mass% or more, and wherein a ratio AGa/BGa of Ga content AGa (mass%) in a surface layer ranging from a surface to a 5 nm depth to Ga content BGa (mass%) in an inside of the aluminum material deeper than 5nm from the surface is 3 or less, and wherein a potential at the point where the current density increases rapidly E is higher than -770 mV vs S.C.E and lower than -710 mV vs S.C.E.

Dielectric ceramics and capacitor

Abstract: A dielectric ceramic and a capacitor comprising the dielectric ceramic are disclosed. The dielectric ceramic has a high dielectric constant that is stable over temperature, and has a small spontaneous polarization. The capacitor can reduce audible noise caused by an electrically induced strain in a power supply circuit.

Thin-film capacitor, variable capacitor, and electronic component

Abstract: PROBLEM TO BE SOLVED: To provide a thin-film capacitor and a variable capacitor having excellent moisture-resistance reliability, and electronic components using them. SOLUTION: The thin-film capacitor has a capacitance generation section which consists of sequential deposits of a lower electrode layer 2, dielectric layer 3, and an upper electrode layer 4 on a support substrate 1, and is covered with an insulator layer 5, wherein at least one of the lower and upper electrode layers 2 and 4 has a top lower than a bottom, and sides as slopes having streaky, continuous irregularity in a vertical direction. Thus, the insulator layer 5 is effectively prevented from being peeled from sides of the lower and upper electrode layers 2 and 4, resulting in high moisture-resistance reliability. COPYRIGHT: (C)2006,JPO&NCIPI

Reliability of High-Voltage Tantalum Polymer Capacitors

Abstract: Tantalum polymer capacitors provide lower ESR and frequently better reliability than conventional MnO2based tantalum capacitors. Their lower ESR facilitates significant penetration into challenging low-voltage applications such as CPU decoupling in laptop computers. Success in low-voltage applications was fortunate because at first it proved difficult to fabricate reliable devices with ratings above roughly 16V. Now, new tantalum polymer capacitors exist with ratings of 25V, 35V, and higher that have reliability on par with their lower-voltage siblings. About seven years ago, time-to-failure data were presented at CARTS that demonstrated the good reliability of 6V tantalum polymer capacitors of aggressive design. Also presented were models for voltage and temperature acceleration that allow customers to estimate lifetime at application conditions based on lifetests performed at accelerated conditions. The present work pertains to higher-voltage tantalum polymer capacitors with 25-50V ratings. A brief description of the technology that allows higher voltage operation is provided. Time-to-failure data are presented that were collected over a wide range of voltages and temperatures. Trends in the data are identified and models for voltage and temperature acceleration are presented. Finally, typical lifetimes at rated conditions are estimated and are compared with the results originally presented for the 6V capacitors.