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Permittivity moisture

With increasing frequency, the permittivity of dielectric decreases. A major factor in the selection of insulation is the ability of the insulation to resist the absorption of moisture. Moisture, of course, can greatly lower resistivity. For wire insulation, synthetic polymers and plastics essentially have replaced the use ol natural rubber. Usually, prior to coaling a wire with a plastic material, (lie wire must he treated to assure good contact and adhesion of the insulating material. Copper wire, for example, is treated with hydrogen fluoride, which creates a coating ol clipper fluoride in the... [Pg.852]

Denton, D., Camou, J. B., and Senturia, S. D., "Effects of Moisture Uptake on the Dielectric Permittivity of Polyimide Films", Proc. 1985 ISA Conf. on Moisture and Humidity, pp. 505-513. [Pg.435]

Here, and 6 are specific electric permittance, relative permittivity of moisture and thickness of the Stern layer. Permittivity of hydrated and orderly moisture near the interface is noticeably lower that relative permittivity of moisture and ranges between 6 and 50 (Hayes et al, 1991). Usually the value 10 is used. [Pg.155]

Although the most well known use of microwave spectroscopy is in the fundamental studies of the rotational structure of free molecules and as a method of determining dipole moments the technique is finding appHcations in the area of process analysis. Its use for process samples depends upon the analyte having different permittivity characteristics to that of the sample as a whole and so the technique is admirably suited to the determination of water or moisture in soHds and Hquids. [Pg.871]

Computer controlled systems have been developed that enable investigation of the spatial distribution of impedance within resins and in turn the identification of flaws (62). Water trapped within the composite will cause dielectric permittivity to increase, thus revealing its presence. Detection of voids, variation in the cross section of the adhesive layer, ingress of moisture into a joint structure, and characterization of cure in epoxy resin can be achieved with high frequency dielectric spectroscopy (10" -10 Hz) (63). [Pg.792]

Zhao, Y., Toyama, M., Kita, K., Kyuno, K. and Toriumi, A. (2006) Moisture-absorption-induced Permittivity Deterioration and Surface Roughness Enhancement of Lanthanum Oxide Films on Silicon. App/. Phys. Lett., 88,072904. [Pg.352]

Eiectricai Complex electrical conductivity, dielectric permittivity, loss factor Chemical and structure characterization, degree of cure, reinforcement ratio, ageing, moisture absorption, geometry, density, electromagnetic wave, transparency... [Pg.46]

Electromagnetic waves Electromagnetic wave reflection, absorption and transmission coefficients Dielectric properties (permittivity, loss factor), moisture absorption, delamination, geometry, flaw size... [Pg.46]

Among various strategies that have been used to synthesize polyimides with lower dielectric constants, the most common approach is to incorporate fluorene, in the form of trifluoromethyl groups, into diamine and dianhydride units that minimize polarizability and increase the free volume [46]. It is well-known that fluorene atom has unique characteristics such as high electronegativity and low electric polarity. These properties give fluorinated polymers (e.g., poly[tetrafluoroethylene]) attractive features such as low water uptake, water and oil repellency, low permittivity, low refractive indices, resistance to wear and abrasion, and thermal and chemical stability. Fluorination is also known to enhance solubility and optical transparency and to lower the moisture absorption of polyimides. Therefore, it is expected that fluorinated polyimides will be widely applied in the electro-optical and semiconductor industries. The polymer series studied was essentially limited mainly to 6F dianhydride because it proved to be the only dianhydride with which many of the fluorinated diamines would form polymer films suitable for physical characterization. [Pg.103]

Some of the properties documented in the specification sheets of IPC-4101 include Tg, copper peel strengths at different conditions, volume resistivity, surface resistivity, moisture absorption, dielectric breakdown voltage, permittivity, loss tangent, flexural strengths and arc resistance. These properties will be discussed further in Chap. 8. [Pg.123]

Effects of Moisture Absorption on the Permittivity and Surface Roughness of LA2O3 Film as Gate Dielectric... [Pg.332]

From above discussion, the moisture absorption which causes the formation of low permittivity lanthanum hydroxide should be a very possible reason for the scattering of the... [Pg.335]

As discussed in the previous section, the moisture absorption can degrade the permittivity and enhance the surface roughness of La203 films. Therefore, it s necessary to prevent or suppress the moisture absorption of La203 films with some post treatments. The moisture absorption is thought to be partly attributed to the oxygen vacancies in the films as the previous literature reported [15] via the following reaction equation. [Pg.336]

Figure 4.1. Variation of the permittivities of LaYO films with the Y concentration. The permittivities were determined by MIM capacitors. The films were thought to be exposed to the air for 0 hour rather than moisture prevented because we didn t prevent the films from the moisture purposely and just deposited the films with Au electrode as quickly as possible after annealing in the RTA furnace... Figure 4.1. Variation of the permittivities of LaYO films with the Y concentration. The permittivities were determined by MIM capacitors. The films were thought to be exposed to the air for 0 hour rather than moisture prevented because we didn t prevent the films from the moisture purposely and just deposited the films with Au electrode as quickly as possible after annealing in the RTA furnace...
Figure 4.3. The effect of moisture absorption on the permittivities of LaYOx films with different Y concentrations. The films were annealed at 600T and the permittivities were measured with MIM capacitors... Figure 4.3. The effect of moisture absorption on the permittivities of LaYOx films with different Y concentrations. The films were annealed at 600T and the permittivities were measured with MIM capacitors...

See other pages where Permittivity moisture is mentioned: [Pg.152]    [Pg.155]    [Pg.152]    [Pg.155]    [Pg.82]    [Pg.768]    [Pg.518]    [Pg.107]    [Pg.72]    [Pg.256]    [Pg.155]    [Pg.199]    [Pg.205]    [Pg.213]    [Pg.24]    [Pg.77]    [Pg.989]    [Pg.8299]    [Pg.368]    [Pg.380]    [Pg.1326]    [Pg.592]    [Pg.92]    [Pg.303]    [Pg.92]    [Pg.332]    [Pg.332]    [Pg.335]    [Pg.336]    [Pg.340]    [Pg.341]    [Pg.341]    [Pg.343]    [Pg.343]   
See also in sourсe #XX -- [ Pg.149 , Pg.155 ]




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