Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Inhomogeneous film

Laterally inhomogeneous films and patterned structures of microelectronic and optoelectronic applications require small measuring spots. Today s measurements in 50 pm X 50 pm areas are standard for p-spot spectroscopic ellipsometers used in fa-blines. Areas more than ten times smaller can be analyzed by use of discrete-wave-length ellipsometers equipped with laser-light sources. [Pg.270]

Receding Waterfront. If significant deformation occurs by capillary deformation, but the voids remain in the film as water recedes, an inhomogeneous film is observed. The deformation is completed by either the dry or moist sintering mechanisms referred to above. This was first identified by Keddie and termed stage 11 ... [Pg.1454]

The measurements on van der Waals-London forces are less straightforward than those on the electrical double layer forces. First, the double layer forces must be suppressed this was achieved by adding so much electrolyte (0.1 M KBr) that 1/k 1 nm. Then, however, the films do not drain regularly to the new equilibrium thickness but spontaneously form black spots at /i=il00 nm, which makes it impossible to perform light-scattering measurements on these (inhomogeneous) films. [Pg.373]

Exceptions to the above are films with special index profiles which offer interesting alternatives to some optical applications. Work on the controlled production of special inhomogeneous films is described in [251- 255]. [Pg.412]

The theoretical treatment of inhomogeneous films started even in 1913 with calculations made by Forsterling [68], followed later by the work of Kofink and Men-zer [69], Schroder [70] and Geffcken [71]. An ideal inhomogeneous antireflection coating is a layer whose optical thickness is comparable with that of a single layer... [Pg.444]

Corrosion at Inhomogeneous Films Breakdown, Pitting and Localized Attack... [Pg.261]

IR SPECTRA OF INHOMOGENEOUS FILMS AND FILMS ON POWDERS AND ROUGH SURFACES. SURFACE ENHANCEMENT... [Pg.219]

In Sections 3.1 and 3.2 the effect of size on IR spectra was discussed solely in the context of ultrathin Aims with plane-parallel boundaries. However, this size effect can be seen for all particles whose size is small relative to the wavelength and can lead to additional, abnormal absorption by both the particles and ultrathin Aims coating such particles. This phenomenon is well known for metals and causes metallic ultrathin films to have different colors than bulk metals. In 1857, Faraday proposed that such a color transformation is associated with the intrinsic aggregating nature of metallic films. His hypothesis has since been confirmed and understood based on Maxwell electrodynamics, and these effects have subsequently been found in the IR range for metals, dielectrics, and semiconductors. Moreover, it has been established that the particle shape also affects the IR spectrum of an ultrathin film in the closest vicinity of a system of particles that are small compared to the wavelength of irradiation. The abnormal absorption of inhomogeneous films remains the subject of intense theoretical investigations, due to the wide practical implications. However, the purpose of this section is not to review this theory in depth but rather to concentrate on the practical aspects of... [Pg.219]

Before considering the IR spectra of inhomogeneous films and ultrathin films on powders and rough surfaces, the effect of the shape of an isolated particle on the IR spectra will be discussed. [Pg.220]

To summarize, IR spectroscopy is able to provide structural information about inhomogeneous films in terms of volume fractions and the form of organization of the inclusions and the percolating degree, requiring an assumption/knowledge of... [Pg.231]

When 0.5 M pyrrole is added to the oxalate solution, its polymerization is difficult on non-pretreated Zn the metal surface is too strong passivated and we obtain at best dentritic and inhomogeneous films. Good fihn qualities are obtained only whai the Zxi has been pretreated with Na2S. These films are synthesized in galvanostatic mode under specific experimental conditions. Whatever the electrolysis current chosen fi om 4 to 30 mA/cm the electrical... [Pg.133]


See other pages where Inhomogeneous film is mentioned: [Pg.540]    [Pg.192]    [Pg.262]    [Pg.732]    [Pg.255]    [Pg.262]    [Pg.242]    [Pg.244]    [Pg.293]    [Pg.406]    [Pg.445]    [Pg.261]    [Pg.264]    [Pg.208]    [Pg.48]    [Pg.60]    [Pg.219]    [Pg.221]    [Pg.223]    [Pg.225]    [Pg.227]    [Pg.229]    [Pg.231]    [Pg.233]    [Pg.235]    [Pg.237]    [Pg.239]    [Pg.241]    [Pg.302]    [Pg.1955]    [Pg.1958]    [Pg.183]    [Pg.2]    [Pg.296]   
See also in sourсe #XX -- [ Pg.2 ]




SEARCH



Composite/inhomogeneous film

Inhomogeneity

Inhomogenities

© 2024 chempedia.info