Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 447 for “"Capacitors"”.
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Dry etching processes for ferroelectric capacitors
… reactive ion etching damage to PZT ferroelectric capacitors was first defined and studied using Ar and CHCIFCF<sub>3</sub> etch gases. It was found that the internal field developed in the capacitors during etching was responsible for causing the shift in hysteresis loop and the reduction of …
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Radiation effects in metal-oxide-semiconductor capacitors
… radiations on commercially made Al-SiO2-Si Capacitors (MOSCs). Detailed studies of the electrical and physical nature of such devices have been used to characterise both virgin and irradiated devices. In particular, an investigation of the nature and causes of dielectric breakdown in MOSCs …
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Double layer capacitors : automotive applications and modeling
… the work on the modeling of double layer capacitors (DLCs) and the validation of the modeling procedure. Several experiments were conducted to subject the device under test to a variety of charging/discharging profile and temperatures in an effort to simulate the various conditions such a …
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Thin-film trench capacitors for silicon and organic packages
… modules. Amongst the power components, thin film capacitors are considered the most challenging to integrate because of several manufacturability concerns. The challenges are related to process compatibility of high permittivity dielectrics with substrates and high surface area electrodes, yield, …
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Condition Monitoring of Electrolytic Capacitors for Power Electronics Applications
… field of condition monitoring of electrolytic capacitors used in power electronics circuits. The construction process of an electrolytic capacitor is presented. Descriptions of various kinds of faults that can occur in an electrolytic capacitor are discussed. The methods available to detect …
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Determination of the Shelf Life of Aluminum Electrolytic Capacitors.
… industry. A factor limiting the storage of spare capacitors is the integrity of the aluminum oxide dielectric, which over time breaks down contributing to a shelf life currently estimated at one nuclear power electric generating station to be approximately five years. This project examined the …
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Preparation of Polymer Composites As Dielectric Materials For Capacitors
<p>Polymer composites with the well-dispersed dielectric ceramic powders as fillers have exhibited enhanced dielectric properties compared to the neat polymers. Polyvinylidene fluoride (PVDF) based ferroelectric polymers are mainly used for energy storage. And CaCu3Ti4O12 (CCTO) is still a novel …
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Hysteresis and memory effects in nanocrystal embedded MOS capacitors
… embedded metal-oxide-semiconductor (NC-MOS) capacitors, the fundamental components of the nanocrystal memory. Various properties of the NC-MOS capacitors including gate stack composition, oxide charge storage and interface traps are studied by making high frequency and quasi-static …
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A method of compensating for dielectric absorption in capacitors.
Thesis. 1978. M.S.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
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Design considerations and characterization of Origami [TM] electrochemical capacitors
Electrochemical capacitors, also known as supercapacitors, ultracapacitors, and electric double-layer capacitors, have recently received attention as electrical energy storage devices. The devices are both high power and high energy, making them ideally suited for load balancing applications in …
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Carbon-based electric double layer capacitors for water desalination
In capacitive deionization (CDI), salt water is passed through two polarized electrodes, whereby salt is adsorbed onto the electrode surface and removed from the water stream. This approach has received renewed interest for water desalination due to the development of new high-surface area, …
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Degradation mechanisms of barium titanate based thick film capacitors
… high K (≅ 500) barium titanate based thick film capacitors were studied. It was found that a gold conductor made from Au metallo-organic paste is not compatible with the porous high K dielectric material. The leakage current of a thick film capacitor made from Ag/Pd thick film conducting paste …
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Material engineering for Li-ion capacitors and Li-ion batteries
… for certain applications. In this regard, supercapacitors serve as a complementary role. To combine the advantages of Li-ion batteries and supercapacitors and bridge the technological gap, Li-ion capacitors (LICs) are invented. A typical Li-ion capacitor consists of a battery-type anode and …
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Breakdown in high voltage, high energy density multilayer ceramic capacitors
… high energy density, BaTiO₃ multilayer ceramic capacitors were studied. The flexural strength of the capacitors was 96 +/- 13 MPa. Failure was due to surface defects or pores close to the surfaces of the samples. The dielectric breakdown strength of the samples was 181 kV/cm. The causes of …
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