Lead zirconate titanate on base metal foils: An approach for embedded high-K passive components

An approach for embedding high-K dielectric thin films into polymer packages has been developed. Pb{sub 0.85}La{sub 0.15}(Zr{sub 0.52}Ti{sub 0.48}){sub 0.96}O{sub 3} thin films were prepared by chemical solution deposition on 50 {micro}m thick Ni-coated Cu foils. Sputter deposited Ni top electrodes completed the all base-metal capacitor stack. After high temperature N{sub 2} crystallization anneals, the PLZT composition showed reduction resistance while the base-metal foils remained flexible. Capacitance density and Loss tangent values range between 300 and 400 nF/cm{sup 2} and 0.01 and 0.02 from 1 to 1,000 kHz respectively. These properties represent a 2 to 3 order of magnitude improvement over available embedded capacitor technologies for polymeric packages

Measurement and calculation of PZT thin film longitudinal piezoelectric coefficients.

The ferroelectric and piezoelectric properties of 2000 {angstrom} thick chemical solution deposited Pb(Zr{sub x}Ti{sub 1{minus}x})O{sub 3} (PZT) thin films were investigated. Several Zr/Ti ratios were studied: 30/70, 50/50 and 65/35, which correspond to tetragonal, near-morphotropic, and rhombohedral symmetries. In all samples, a {l_brace}111{r_brace}-texture is predominant. Longitudinal piezoelectric coefficients and their dc field dependence were measured using the contact AFM method. The expected trend of a maximum piezoelectric coefficient at or near to the MPB was not observed. The composition dependence was small, with the maximum d{sub 33} occurring in the tetragonal material. To explain the results, crystallographic texture and film thickness effects are suggested. Using a modified phenomenological approach, derived electrostrictive coefficients, and experimental data, d{sub 33} values were calculated. Qualitative agreement was observed between the measured and calculated coefficients. Justifications of modifications to the calculations are discussed

Реакция фоторождения мезонов на нуклонах и ядрах в резонансной области энергий

Исследования реакции фоторождения мезонов на нуклонах необходимы для получения спектра возбужденных барионных резонансов. В данной работе исследуется кинематика реакции фоторождения на протоне каона и вычислены сечения в рамках изобарной модели этой реакции в области энергии возбуждения резонанса N(1900)3/2+ с помощью формулы Брейта-Вигнера для изолированного резонанса и мультипольного анализа. Полученные оценки сечения согласуются с имеющимися экспериментальными данными.Investigations of the photoproduction of mesons on nucleons are necessary for obtaining the spectrum of excited baryon resonances. In this paper, we study the kinematics of the photoproduction reaction on the proton of the kaon and calculate the cross sections in the framework of the isobar model of this reaction in the region of the excitation energy of resonance N (1900) 3/2 * using the Breit-Wigner formula for isolated resonance and multipole analysis. The obtained estimates of the cross section agree with the available experimental data

Real-time X-ray studies of the effect of chemical transients on oxide thin-film surface structure

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