Merge from Paraelectricity date September 2010 A dielectric is an electrical Insulator electrical insulator that can be Dielectric Dipolar polarization polarized by an applied electric field . When a dielectric ... dielectric polarization . Because of dielectric polarization, positive charges are displaced ... field which reduces the overall field within the dielectric itself. ref http www.britannica.com EBchecked topic 162630 dielectricDielectric . Encyclopedia Britannica ref If a dielectric is composed ... electrical conduction , dielectric is typically used to describe materials with a high polarizability . The latter is expressed by a number called the dielectric constant . A common, yet notable example of a dielectric is the electrically insulating material between the metallic plates of a capacitor . The polarization of the dielectric by the applied electric field increases the capacitor s surface ... pages 1 publisher year 2009 id Online accessdate 2009 08 12 ref The study of dielectric properties ... R. von Hippel , in his seminal work, Dielectric Materials and Applications , stated Dielectrics ... wikt dielectricdielectric was coined by William Whewell from wikt dia dia electric in response to a request ... permittivity The electric susceptibility sub e sub of a dielectric material is a measure of how ... which may be a tensor relating an electric field E to the induced dielectric polarization electrostatics ... chi e 0 math . Dielectric polarization Dielectric polarization redirects here Basic atomic model Image dielectric model.svg right thumb 400px Electric field interaction with an atom under the classical dielectric model. In the classical approach to the dielectric model, a material is made up of atoms ... in the dielectric material interact with one another Citation needed date February 2008 . Note that this model ... and the dipole moment that gives rise to the behavior of the dielectric. Note that the dipole moment ... of the dielectric now depends on the situation. The more complicated the situation the richer ... more details
Unreferenced stub auto yes date December 2009 Orphan date February 2009 Image Glass is Liquide.jpg thumb Three dielectric interfaces rendered using the shader. Image Seduce Me by DonBertone.jpg thumb A very accurate render using the shader. The Dielectric Physical Phenomenon Shader is a shader used by the LightWave and Mental Ray 3D Rendering computer graphics rendering engines. It is based on a dielectric dielectric model of physics, which describes how electromagnetic fields behave inside materials. The dielectric shader is able to realistically render the behavior of light rays passing through materials with differing refractive index refractive indices , as well as attenuation of the ray as it passes through a material. Dielectric Shader The shader uses Fresnel equations to simulate reflectance and transmittance of light passing through the dielectric interface, as well as using Snell s law to determine the angle of refraction. In addition Beer s law is used to determine absorption of rays passing through dielectric materials. Two types of dielectric interfaces are supported dielectric air between a dielectric material and air. dielectric dielectric between two dielectric materials. Gallery gallery Image Alcool Di VertigoSP.jpg Frosted glass using Dielectric and Spekle bump mapping. Image RGB.jpg Red, green, and blue rings demonstrating Fresnel reflections. Image C S.jpg Solid glass letters with an IOR of 1.333. Image Le doublot.jpg Two solid dielectric objects overlapping to show the refracting effect. gallery Category 3D graphics software Graphics software stub ... more details
Dielectric reluctance is a scalar measurement of a passive dielectric circuit or element within that circuit dependent on voltage and electric induction flux, and this is determined by deriving the ratio of their amplitudes. The units of dielectric reluctance are F sup 1 sup inverse farad s see daraf Ref. 1 3 . math z epsilon frac U Q frac U m Q m math As seen above, dielectric reluctance is represented as lowercase z epsilon . For a dielectric in a dielectric circuit to have no energy losses, the imaginary part of its dielectric reluctance is zero. This constitutes a lossless resistance to electric induction flux, and is therefore real analysis real , not complex analysis complex . This formality is similar to Ohm s Law for a resistive circuit . In dielectric circuits, a dielectric material has a lossless dielectric reluctance equal to math z epsilon frac 1 epsilon epsilon 0 frac l S math Where math l math is the circuit length math S math is the cross section of the circuit element math epsilon epsilon 0 math is the dielectric permeability See also DielectricDielectric complex reluctance General definition of dielectric reluctance that accounts for energy loss References Hippel A. R., Dielectrics and Waves. New York John Wiley, 1954. Popov V. P., The Principles of Theory of Circuits. M. Higher School, 1985, 496 p. In Russian . Karl K pfm ller K pfm ller K. Einf hrung in die theoretische Elektrotechnik, Springer Verlag, 1959. Category Electric and magnetic fields in matter ... more details
A dielectric resonator also dielectric resonator oscillator , DRO is an Electronics electronic component ... by large change in permittivity rather than by a conductor. Dielectric resonators generally consist of a puck of ceramic that has a large dielectric constant and a low dissipation factor . The Resonance resonance frequency is determined by the overall physical dimensions of the puck and the dielectric ... that an infinitely long cylindrical rod made up of dielectric material could serve as a waveguide ref Lord Rayleigh, On the Passage of Waves Through Tubes, or the Vibration of Dielectric Cylinders .... Since a dielectric resonator can be thought of as a truncated dielectric rod waveguide, this research was essential for scientific understanding of electromagnetic phenomena in dielectric resonators. In 1939 Robert D. Richtmyer published a study ref R.D. Richtmyer, Dielectric Resonators , J.Appl. Phys., Vol. 10, pp. 391 398, June 1939. ref in which he showed that dielectric structures can act just as metallic cavity resonators. He appropriately named these structures dielectric resonators . Richtmyer ... conditions at the dielectric to air interface. These results were later used in development of Dielectric Resonator Antenna DRA Dielectric Resonator Antenna . Due to World War II , lack of advanced materials and adequate manufacturing techniques, dielectric resonators fell in relative ... frequency electronics and modern communications industry started to take off, dielectric resonators ... Guillon, Dielectric Resonators, Artech House, Dedham, MA, 1986. ref , frequency selective limiter ref Marian W. Pospieszalski, Cylindrical Dielectric Resonators and Their Applications in TEM Line ... and slow wave ref Marian W. Pospieszalski, Cylindrical Dielectric Resonators and Their Applications ... 1979. ref circuits. In addition to cost and size, other advantages that dielectric resonators have .... There is a vast availability of different dielectric resonators on the market today with unloaded ... more details
Unreferenced date December 2006 A gate dielectric is a dielectric used between the gate and substrate of a field effect transistor . In state of the art processes, the gate dielectric is subject to many constraints, including Electrically clean interface to the substrate low density of quantum state s for electrons High capacitance , to increase the FET transconductance High thickness , to avoid dielectric breakdown and leakage by quantum tunneling . The capacitance and thickness constraints are almost directly opposed to each other. For silicon substrate FETs, the gate dielectric is almost always silicon dioxide called gate oxide , since thermal oxidation thermal oxide has a very clean interface. However, the semiconductor industry is interested in finding alternative materials with higher dielectric constants, which would allow higher capacitance with the same thickness. Further High k dielectric See also QBD electronics DEFAULTSORT Gate Dielectric Category Dielectrics Category Semiconductor structures Electronics stub zh ... more details
Dielectric absorption is the name given to the effect by which a capacitor that has been charged for a long time discharges only incompletely when briefly discharged. Although an ideal capacitor would remain at zero volts after being discharged, real capacitors will develop a small voltage, a phenomenon that is also called soakage or Battery electricity battery action. For some dielectric s, such as many polymer films, the resulting volt age may be less than 1 2 of the original voltage, but it can be as much as 15 25 for electrolytic capacitor s or supercapacitor s. See permittivity and Types of capacitor Dielectric absorption soakage . References http www.designers guide.org Modeling da.pdf Modeling Dielectric Absorption in Capacitors , by Ken Kundert http www.national.com rap Application 0,1570,28,00.html Understand Capacitor Soakage to Optimize Analog Systems , by Bob Pease, 1982 http www.keith snook.info capacitor soakage.html Capacitor Soakage takes a RAP DEFAULTSORT Dielectric Absorption Category Capacitors electronics stub ... more details
A liquid dielectric is a dielectric material in liquid state. Its main purpose is to prevent or rapidly quench electric discharge s. Dielectric liquids are used as electrical insulator s in high voltage applications, e.g. transformer s, capacitor s, high voltage cable s, and switchgear namely high voltage switchgear . Its function is to provide electrical insulation , suppress corona discharge corona and arcing , and to serve as a coolant . A good liquid dielectric should have high dielectric strength , high thermal stability and chemical inertness against the construction materials used, non flammability and low toxicity , good heat transfer properties, and low cost. Liquid dielectrics are self healing when an electric breakdown occurs, the discharge channel does not leave a permanent conductive trace in the fluid. The electrical properties tend to be strongly influenced by dissolved gases e.g. oxygen or carbon dioxide , dust, fibers, and especially ionic impurities and moisture . Electrical discharge may cause production of impurities degrading the dielectric s performance. ref name hveng http books.google.com books?id FGowlP lKK8C&pg PA85&dq dielectric liquids&lr &num 50&as brr 3&cd 6 v onepage&q dielectric 20liquids&f false ref Some examples of dielectric liquids are transformer oil , perfluoroalkane s, and purified water . class wikitable sortable Common liquid dielectrics Name Dielectric constant Max. breakdown strength MeV cm Properties Mineral oil 1.0 ref name hveng Flammable. Common type of transformer oil . n Hexane 1.1 1.3 ref name hveng Flammable. Used in some capacitors. n Heptane Flammable. Castor oil 4.7 High dielectric constant. Flammable. Refined and dried castor oil is used in some high voltage capacitor s. Silicone oil 1.0 1.2 ref name hveng More expensive than hydrocarbons. Less flammable. Polychlorinated biphenyl s Formerly used in transformers and capacitors ... 1.42 ref name hveng Cryogenic. See also Dielectric gas References references Category Dielectrics ... more details
In physics , the term dielectric strength has the following meanings Of an insulating material, the maximum electric field strength that it can withstand intrinsically without breaking down, i.e. , without experiencing failure of its insulating properties. For a given configuration of dielectric material and electrodes, the minimum electric field that produces breakdown. the maximum electric stress the dielectric material can withstand without breakdown The theoretical dielectric strength of a material is an intrinsic property of the bulk material and is dependent on the configuration of the material or the electrodes with which the field is applied. At breakdown, the electric field frees bound electrons. If the applied electric field is sufficiently high, free electrons may become accelerated ... insulating capability. Factors affecting dielectric strength it increases with the increase in thickness ... at which breakdown occurs depends on the respective geometries of the dielectric insulator and the electrodes ... field is applied. Because dielectric materials usually contain minute defects, the practical dielectric strength will be a fraction of the intrinsic dielectric strength of an ideal, defect free, material. Dielectric films tend to exhibit greater dielectric strength than thicker samples of the same material. For instance, the dielectric strength of silicon dioxide films of a few hundred nm ... of electron tunneling . Multiple layers of thin dielectric films are used where maximum practical dielectric strength is required, such as high voltage capacitor s and pulse transformer s. Dielectric ... Dielectric Strength MV m Helium ref name CRC CRC Handbook of Chemistry and Physics ref ntsh 0.15 0.15 ... ntsh 1000 1000 See also Dielectric constant Rotational Brownian motion References references FS1037C MS188 External links http www.isomil.de en thermocouple dielectric strength.htm Dielectric Strength ...?arnumber 1474271 Article The maximum dielectric strength of thin silicon oxide films from IEEE Transactions ... more details
Image BroadBandDielectricMirror.jpg thumb 300px right Two broadband dielectric mirrors being used in an optics experiment. A dielectric mirror is a type of a mirror composed of multiple thin film thin layers of dielectric material, typically deposited on a substrate of glass or some other optical material. By careful choice of the type and thickness of the dielectric layers, one can design an optical coating with specified reflectivity at different wavelength s of light . Dielectric mirrors are also used to produce ultra high reflectivity mirrors values of 99.999 or better over a narrow range of wavelengths can be produced using special techniques. Alternatively, they can be made to reflect a broad ... , and the coatings on modern Mirrored sunglasses mirrorshades . Mechanism image Dielectric mirror diagram.svg thumb right Diagram of a dielectric mirror. Thin layers with a high refractive index n sub .... Dielectric mirrors function based on the Interference wave propagation interference of light reflected from the different layers of dielectric stack. This is the same principle used in multi layer Anti reflective coating anti reflection coatings , which are dielectric stacks which have been designed to minimize rather than maximize reflectivity. Simple dielectric mirrors function like one ... a thickness of a quarter wavelength. File Dielectric filter tilted.gif thumb right The color transmitted by the dielectric filters shifts when the angle of incident light changes. Other designs have .... In the design of dielectric mirrors, an optical transfer matrix method optics transfer matrix method can be used. Dielectric mirrors exhibit Wave plate retardance as a function of angle of incidence ... of an approximately 13 micrometre piece of dielectric mirror being cut from a larger substrate. Alternating ... techniques for dielectric mirrors are based on thin film deposition methods. Common techniques ... of dielectric mirror reflectivity and dispersion Category Optical filters Category Mirrors ar ... more details
A dielectric gas , or insulating gas , is a dielectric material in gaseous state. Its main purpose is to prevent or rapidly quench electric discharge in gases electric discharge s. Dielectric gases are used as insulator electrical electrical insulators in high voltage applications, e.g. transformer s, circuit breaker s namely sulfur hexafluoride circuit breaker s , switchgear namely high voltage switchgear , radar waveguide s, A good dielectric gas should have high dielectric strength , high thermal stability and chemical inertness against the construction materials used, non flammability and low toxicity , low boiling point , good heat transfer properties, and low cost. ref name hveng http books.google.com books?id RF MvfqYMagC&pg PA35&dq dielectric gas &lr &num 50&as brr 3&cd 8 v onepage&q 22dielectric 20gas 22&f false ref The most common dielectric gas is air , due to its ubiquity and low cost. Another commonly used gas is a dry nitrogen . In special cases, e.g., high voltage switches, gases with good dielectric properties and very high breakdown voltage s are needed. Highly electronegative elements, e.g., halogen s, are favored as they rapidly Carrier generation and recombination ... 04 About HV Devices 04 ref Build up of moisture can degrade dielectric properties of the gas. Moisture analysis is used for early detection of this. Dielectric gases can also serve as coolant s. Vacuum .... Addition of sulfur hexafluoride can dramatically improve the dielectric properties of poorer insulators, e.g. helium or nitrogen. ref http books.google.com books?id uJT4mENgMbQC&pg PA433&dq dielectric ... can offer superior dielectric properties the optimum mixtures combine the electron attaching ... used alone. In mixture with SF sub 6 sub somewhat decrases sulfur hexafluoride s dielectric properties ... http books.google.com books?id 1fgjnGtAdSkC&pg PA45&dq dielectric gas &lr &num 50&as brr 3&cd 14 ... Category Dielectric gases Category Electric power systems components Category Electric power ... more details
split apart Electrochemical impedance spectroscopy Dielectric spectroscopy part yes date January 2010 Image Dielectric responses.svg thumb right 454px A dielectric permittivity spectrum over a wide range of frequencies. The real and imaginary parts of permittivity are shown, and various processes are depicted ionic and dipolar relaxation, and atomic and electronic resonances at higher energies. From the http www.psrc.usm.edu mauritz dilect.html Dielectric spectroscopy page of the research group of http www.psrc.usm.edu mauritz mauritz.html Dr. Kenneth A. Mauritz . Dielectric spectroscopy sometimes called Electrical impedance impedance spectroscopy , and also known as Electrochemical Impedance Spectroscopy , measures the dielectric properties of a medium as a function of frequency . ref name Kremer F. 2002 Kremer F., Schonhals A., Luck W. Broadband Dielectric Spectroscopy. Springer Verlag, 2002. ref ref Sidorovich A. M., Dielectric Spectrum of Water. Ukrainian Physical Journal, 1984, vol. 29, No 8, p. 1175 1181 In Russian . ref ref Hippel A. R. Dielectrics and Waves. N. Y. John Willey & Sons, 1954. ref ref Volkov A. A., Prokhorov A. S., Broadband Dielectric Spectroscopy of Solids. http ..., Hermann, Paris, 2005. ref Dielectric mechanisms There are a number of different dielectric mechanisms ... . Each dielectric mechanism is centered around its characteristic frequency, which is the reciprocal of the characteristic time of the process. In general, dielectric mechanisms can be divided into dielectric ... , where charge carriers blocked at inner dielectric boundary layers on the mesoscopic scale or external ... by a considerable distance and therefore make contributions to the dielectric loss that are orders of magnitude larger than the response due to molecular fluctuations. ref name Kremer F. 2002 Dielectric relaxation Dielectric relaxation as a whole is the result of the movement of dipoles dipole ... Dielectric Spectroscopy Category Spectroscopy Category Electric and magnetic fields in matter Category ... more details
to as dielectric heating, and is most widely observable in the microwave oven where it operates most ... solids, liquids, or gases , provided they contain some electric dipoles. Power Dielectric heating should ... is high, such that math sigma ll omega epsilon math , then dielectric heating is the dominant mechanism of loss. For dielectric heating the generated power density per volume is calculated by math p ... permittivity is a measure for the ability of dielectric material to convert radio frequency electromagnetic ... frequency electric fields for heating dielectric materials had been proposed in the 1930s, for example ... relates to heating systems for dielectric materials and the object of the invention is to heat such materials ... therefore to heat such materials simultaneously throughout their mass by means of the dielectric loss ... oven makes use of microwave frequency electric fields for highly efficient dielectric heating ... and apparatus for heating dielectric materials refend DEFAULTSORT Dielectric Heating Category Electric ... more details
Dielectric elastomers DEs are smart material systems which produce large Strain materials science strains up to 300 and belong to the group of electroactive polymers EAP . Based on their simple working principle dielectric elastomer actuators DEA transform electric energy directly into mechanical work. DE are lightweight, have a high elastic energy density and are investigated since the late 90 s. Many potential applications exist as prototypes. Every year in spring a SPIE conference takes place in San Diego where the newest research results concerning DEA are exchanged. Image dielectric elastomers.gif framed Working principle of dielectric elastomer actuators. An elastomeric film is coated on both sides with electrodes. The electrodes are connected to a circuit. By applying a voltage math U math the electrostatic pressure math p el math acts. Due to the mechanical compression the elastomer film contracts in the thickness direction and expands in the film plane directions. The elastomer film moves back to its original position when it is short circuited. Working principle A DEA is a compliant capacitor see image , where a passive elastomer film is sandwiched between two compliant electrode ... is the dielectric constant of the polymer and math z math is the thickness of the elastomer film ... when large strains are required The dielectric constant should be high The electrical breakdown strength .... Configurations Several configurations exist for dielectric elastomer actuators Framed In Plane ... Dielectric elastomers offer a wide variety of potential applications as a novel actuator technology that can replace many electromagnetic actuators, pneumatics, and piezo actuators. And dielectric .... A list of some applications for dielectric elastomers are Haptic Feedback Pumps Valves Robotics ... and Sommer Larsen Dielectric elastomers as electromechanical transducers. Fundamentals, materials ... DEFAULTSORT Dielectric Elastomers Category Smart materials Smart materials Category Conductive polymers ... more details
SVG made in Inkscape by User Superm401 version of public domain Image Dielectric model.png , by User Timwilson85 . It shows how an electric field interact with an atom under the classical dielectric model. PD self date December 2007 ... more details
Dielectric complex reluctance is a scalar measurement of a passive dielectric circuit or element within that circuit dependent on sinusoidal voltage and sinusoidal electric induction flux, and this is determined by deriving the ratio of their complex effective amplitudes. The units of dielectric complex reluctance are math F 1 math inverse Farads see Daraf Ref. 1 3 . math Z epsilon frac dot U dot Q frac dot U m dot Q m z epsilon e j phi math As seen above, dielectric complex reluctance is a phasor represented as uppercase Z epsilon where math dot U math and math dot U m math represent the voltage complex effective amplitude math dot Q math and math dot Q m math represent the electric induction flux complex effective amplitude math z epsilon math , lowercase z epsilon , is the real part of dielectric reluctance The lossless dielectric reluctance , lowercase z epsilon , is equal to the Absolute value Complex numbers absolute value modulus of the dielectric complex reluctance. The argument distinguishing the lossy dielectric complex reluctance from the lossless dielectric reluctance is equal to the natural number math e math raised to a power equal to math j phi j left beta alpha right math Where math j math is the imaginary number math beta math is the phase of voltage math alpha math is the phase of electric induction flux math phi math is the phase difference The lossy dielectric complex reluctance represents a dielectric circuit element s resistance to not only electric induction flux but also to changes in electric induction flux. When applied to harmonic regimes, this formality is similar to Ohm s Law in ideal AC circuits. In dielectric circuits, a dielectric material has a dielectric complex reluctance equal to math Z epsilon frac 1 dot epsilon epsilon 0 frac l S math ... element math dot epsilon epsilon 0 math is the complex dielectric permeability See also DielectricDielectric reluctance Special definition of dielectric reluctance that does not account for energy ... more details
obsolete Dielectric responses.svg Summary An illustration of the frequency response of various dielectric mechanisms in terms of the real and imaginary parts of the permittivity . Image used with the consent of Prof. Kenneth A. Mauritz see http www.psrc.usm.edu mauritz index.html source page . Licensing attribution ... more details
obsolete Dielectric responses.svg Replaces JPEG version. An illustration of the frequency response of various dielectric mechanisms in terms of the real and imaginary parts of the permittivity . Image used with the consent of Prof. Kenneth A. Mauritz see http www.psrc.usm.edu mauritz index.html source page . Licensing attribution ... more details
orphan date January 2010 Dielectric breakdown model DBM is a macroscopic mathematical model combining the diffusion limited aggregation model with electric field . It was developed by Niemeyer, Pietronero, and Weismann in 1984. It describes the patterns of dielectric breakdown of solids, liquids, and even gases, explaining the formation of the branching, self similar Lichtenberg figure s. External links http classes.yale.edu fractals Panorama Physics DLA DBM DBM.html Dielectric Breakdown Model Category Electricity phys stub ... more details
Unreferenced date October 2006 Dielectric Thermal Analysis DETA , or Dielectric Analysis DEA , is a materials science technique similar to dynamic mechanical analysis except that an oscillating electrical field is used instead of a mechanical force. For investigation of the curing behavior of thermosetting resin systems, composite materials, adhesives and paints, Dielectric Analysis DEA can be used in accordance with ASTM E 2038 or E 2039. The great advantage of DEA is that it can be employed not only on a laboratory scale, but also in process. Measuring Principle In a typical test, the sample is placed in contact with two electrodes the dielectric sensor and a sinusoidal voltage the excitation is applied to one electrode. The resulting sinusoidal current the response is measured at the second electrode. The response signal is attenuated in amplitude and shifted in phase in relation to the mobility of the ions and alignment of the dipoles. Dipoles in the material will attempt to align with the electric field and ions present as impurities will move toward the electrode of opposite polarity. The dielectric properties of permittivity and loss factor are then calculated from this measured amplitude and phase change. DEFAULTSORT Dielectric Thermal Analysis Category Materials science Category Scientific techniques Science stub ref http www.netzsch thermal analysis.com en products dielectric analysis Netzsch Ger tebau GmbH ref ... more details
If the dielectric resonator is placed in an open environment, power is lost in the radiated fields. This fact makes dielectric resonators useful as antenna elements. Dielectric resonator antennas DRA offer following attractive features The dimension of a DRA is of the order of math frac lambda 0 sqrt epsilon r math , where math lambda 0 math is the free space wavelength and math epsilon r math is the Relative static permittivity dielectric constant of the resonator material. Thus, by choosing a high value of math epsilon r math math epsilon r approx10 100 math , the size of the DRA can be significantly reduced. There is no inherent conductor loss in dielectric resonators. This leads to high radiation efficiency of the antenna. This feature is especially attractive for millimeter mm wave antennas, where the loss in metal fabricated antennas can be high. DRAs offer simple coupling schemes to nearly all transmission lines used at microwave and mm wave frequencies. This makes them suitable for integration into different planar technologies. The coupling between a DRA and the planar transmission line can be easily controlled by varying the position of the DRA with respect to the line. The performance of DRA can therefore be easily optimized experimentally. The operating bandwidth of a DRA can be varied over a wide range by suitably choosing resonator parameters. For example, the bandwidth of the lower order modes of a DRA can be easily varied from a fraction of a percent to about 10 or more by the suitable choice of the dielectric constant of the resonator material. Each mode of a DRA has a unique internal and associated external field distribution. Therefore, different radiation characteristics can be obtained by exciting different modes of a DRA. See also Portal Electronics Dielectric wireless receiver References R. K. Mongia, and P. Bhartia, Dielectric Resonator Antennas A Review and General Design Relations for Resonant Frequency and Bandwidth , International Journal ... more details
In semiconductor manufacturing, a low dielectric is a material with a small dielectric constant relative to silicon dioxide. Although the proper symbol for the dielectric constant is the Greece Greek letter kappa , in conversation such materials are referred to as being low k low kay rather than low low kappa . Low dielectric material implementation is one of several strategies used to allow ... adversely affect the performance of the device. Replacing the silicon dioxide with a low dielectric ... heat dissipation. Low materials The dielectric constant of SiO sub 2 sub , the insulating material ... dielectric constants but few of them can be suitably integrated into a manufacturing process ... By doping SiO sub 2 sub with fluorine to produce fluorinated silica glass, the dielectric constant ... By doping SiO sub 2 sub with carbon, one can lower the dielectric constant to 3.0. Major products of carbon .... ref http www.fabtech.org content view 2079 74 ASM International continues low dielectric relationship ... may be employed to create large voids or pore s in a silicon dioxide dielectric. Air has a dielectric constant of roughly 1.0005, thus the dielectric constant of the porous material may be reduced by increasing the porosity of the film. Dielectric constants lower than 2.0 have been reported. Integration ... dielectric layers with very low dielectric constant was developed by A. Grill, V.V. Patel, S.M. Gates ... of low k dielectric layers are in the public domain and therefore not patentable, the technique ... resin, the dielectric constant value can be lowered to 2.2. ref http www.dow.com silk silky feature.htm Why Porous SiLK? ref Spin on silicone based polymeric dielectric There are two kinds of silicone based polymeric dielectric materials, hydrogen silsesquioxane HSQ and methylsilsesquioxane MSQ . See also High k dielectric Relative static permittivity References reflist 2 External links http ... of interconnect technology for silicon integrated circuitry DEFAULTSORT Low K Dielectric Category ... more details
The term high dielectric refers to a material with a high dielectric constant as compared to silicon dioxide used in semiconductor manufacturing processes which replaces the silicon dioxide gate dielectric .... As transistors have decreased in size, the thickness of the silicon dioxide gate dielectric has ... the silicon dioxide gate dielectric with a high material allows increased gate capacitance without ... 0 A t math Image High k.svg frame right Conventional silicon dioxide gate dielectric structure compared to a potential high k dielectric structure Image FET cross section.png thumbnail Cross section of an NMOS transistor showing the gate oxide dielectric Where A is the capacitor area is the dielectric constant relative dielectric constant of the material 3.9 for silicon dioxide sub 0 ... flowing through the structure as well as improving the gate dielectric Reliability engineering reliability ... dielectric when the underlying channel is in the inverted state V sub G sub is the voltage applied to the transistor ... length or an increase in the gate dielectric capacitance. Materials and considerations Replacing the silicon dioxide gate dielectric with another material adds complexity to the manufacturing ... focused on finding a material with a requisitely high dielectric constant that can be easily integrated ... layer deposition . It is expected that defect states in the high k dielectric can influence its ... to ultrathin high dielectric constant insulator film characterization year 2006 last1 Lau first1 ..., wherein a conventionally formed silicon oxide dielectric is infused with a small amount of nitrogen. The nitride content subtly raises the dielectric constant and is thought to offer other advantages, such as resistance against dopant diffusion through the gate dielectric. In early 2007, Intel ... has also announced the use of a HfSiON dielectric in their 55 nm UltimateLowPower technology .... See also Low k dielectric Silicon germanium Silicon on insulator References reflist 2 Further reading ... more details
The thermo dielectric effect is the production of electric current s and charge physics charge separation during phase transition . This interesting effect was discovered by Joaquim da Costa Ribeiro in 1944 . The Brazil ian physicist observed that solidification and melting of many dielectric s are accompanied by charge separation. A thermo dielectric effect was demonstrated with carnauba wax , naphtalene and paraffin . Charge separation in ice was also expected. This effect was observed during water freezing period, electrical storm effects can be caused by this strange phenomenon . Effect was measured by many researches Bernhard Gross , Armando Dias Tavares , Sergio Mascarenhas etc. C sar Lattes co discoverer of the pion supposed that this was the only effect ever to be discovered entirely in Brasil . References cite journal last Gross first B. title Theory of Thermodielectric effect journal Physical Review volume 94 pages 1545 1551 year 1954 doi 10.1103 PhysRev.94.1545 cite book url http books.google.com ?id 4FLaZzmP6RIC&pg PA248 title Science in Latin America a history isbn 9780292712713 author1 Salda a, Juan Jos year 2006 External links http dielektrika.kvalitne.cz termojeveng.html Thermodielectric effect measurement States of matter Category Thermodynamics Category Electricity Category Physical phenomena Category Energy conversion interwiki cs Termodielektrick jev ... more details
Dielectric barrier discharge DBD is the electrical discharge between two electrodes separated by an insulating dielectric barrier. Originally called silent inaudible discharge and also known as ozone production ... Takemoto, Yoshinori Aiura, and TatsushiIgarashi. http www.freepatentsonline.com 5757132.html Dielectric ... and I. Sardja. http ieeexplore.ieee.org xpl freeabs all.jsp?arnumber 166255 Dielectric barrier discharge ... generators to flat television screens history and future potential of dielectric barrier discharges ... charge distributions in Dielectric Barrier Discharges work Publication date 2009 publisher European ... devices can be made in many configurations, typically planar, using parallel plates separated by a dielectric or cylindrical, using coaxial plates with a dielectric tube between them. ref name kraus ... 2001 b007015g.pdf CO sub 2 sub reforming of methane by the combination of dielectric barrier discharges ... In a common coaxial configuration, the dielectric is shaped in the same form as common fluorescent ... walls acting as the dielectric barrier. Due to the atmospheric pressure level, such processes require high energy levels to sustain. Common dielectric materials include glass, quartz, ceramics ... web url http hal.archives ouvertes.fr docs 00 25 55 61 PDF ajp jp4199707C405.pdf title Dielectric ... of the dielectric, they discharge in microseconds millionths of a second , leading to their reformation ... , semiconductor surfaces , that can also act as dielectric barrier, or to modify gases. Since the 19th ... pressure. Medicine Dielectric barrier discharges were used to generate relatively large volume diffuse ... title Dielectric barrier discharge system with catalytically active porous segment for improvement ... 7855497.html title Dielectric barrier discharge lamp comprising an UV B phosphor publisher Freepatentsonline.com 12 21 2010 accessdate 9th January 2011 ref Industry A dielectric barrier discharge ... wafers. ref Cite web url http www.siliconfareast.com dielectric.htm title Dielectric publisher ... more details
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