Overcoat layer

Overall heat-transfer coefficient, 13 244 Overall return rate (ORR), 9 545 Overbasing, 15 423 Overcladding, in optical fiber manufacturing, 11 144 Overcoat layers, in photography, 19 199 Overcuring, in tire compounding, 21 810 Overfeed/underfeed drums, 15 439-440 Overflow... 

Protective layer, in landfill design, 25 879 Protective overcoat layers, in photography, 19 199... 

The colour filter layer consists of the RGB colour elements set inside the so-called black matrix, which prevents leakage of light from the different pixels and also stops any photoelectrical conversion in the TFT. The structure of the colour filter layer, illustrated in Figure 5.7, is constructed on a clear substrate, and consists of the RGB hlter units, the black matrix interlayer, an overcoat layer, and an ITO him. Amongst the preferred methods for constraction of pigment based colour hlter layers are photolithographic printing and electrodeposition processes. ... 

The increasing importance of multilevel interconnection systems and surface passivation in integrated circuit fabrication has stimulated interest in polyimide films for application in silicon device processing both as multilevel insulators and overcoat layers. The ability of polyimide films to planarize stepped device geometries, as well as their thermal and chemical inertness have been previously reported, as have various physical and electrical parameters related to circuit stability and reliability in use (1, 3). This paper focuses on three aspects of the electrical conductivity of polyimide (PI) films prepared from Hitachi and DuPont resins, indicating implications of each conductivity component for device reliability. The three forms of polyimide conductivity considered here are bulk electronic ionic, associated with intentional sodium contamination and surface or interface conductance. 

Transfer-printing The method consists in screen-printing an ink pattern (see Section 5.4.3 wet process ) onto a water-soluble paper substrate. A temporary carrier overcoat layer (e.g. an acrylic) is then printed over the pattern. The ceramic layer and overcoat are removed from the water-soluble paper and squeegeed on to the chosen substrate. The substrate and transferred layer are then co-fired, the carrier overcoat burning away. 

The above three layers form what is collectively referred to as the "ink-receptive formulation". Critical to the success of this product is the COLORCAST technology embodied by the cationic polymer additives called "mordants" that are designed to bind and fix the dye molecules, along the ceramic nanoparticle in the protective overcoat. The exact choice, concentration, and location of the mordants are critical to achieving the best balance of image stabUity across the four main environmental factors hght, heat, humidity, and ozone. Equally important is incorporation of the proprietary ceramic nanoparticles present in the overcoat layer. 

Overcoat layers are used to protect the photoreceptor surface from scratching and abrasion, and chemical degradation due to corona by-products [7]. Overcoats may be relatively thick polymeric layers (microns) or thin (submicron) refractory... 

Gelatin is often used in subbing layer compositions, since it is the most prevalent binder used in the emulsion and overcoat layers. Gelatin in the subbing... 

Figure 5.5. Transmission electron micrograph of a thin ( 100 nm thick) cross-section of commercial VRIOO amateur colour-negative film. The top overcoat layer is at the far right. The next is a UV layer with a Lippmann emulsion, followed by the fa.st and slow blue-sensitive layers, two interlayers, fast and slow green-sensitive layers, an interlayer, fast and slow red-sensitive layers, an antihalation layer, and a portion of the PET support. The overall width of the figure corresponds to a total thickness of 53 pm...

Adhesive forces and attractive interactions are greatest for parallel planar surfaces and decrease in proportion to the contact area. Matte beads in the 1 to 5 pm diameter range, when coated at a low-number density in overcoat layers, mechanically retard adhesion interactions between stacked layers (as in a box of sheet film or paper) and rolled layers (as in large rolls during manufacturing or in consumer roll film), since only point contacts can be made with a surface coming in contact with an overcoat layer containing matte beads. 

A schematic figure of the sensor element is shown in Figure 3.1.3. The outer surface is exposed direcdy to the exhaust gas, whereby plasma jet coating layer (called overcoat layer) is arranged as a ceramic protection layer [3]. The layer has Pt electrode retention for the sensor element surface, Pt sublimation velocity reduction. Further, the layer prevents against the attack of poisoning... 

Fig. 15 Layer structure of a sample film containing labeled PiBMA chains in the middle layer of PiBMA. Two monolayers of poly(vinyl octanal acetal) were deposited as the precoat and overcoat layers to protect the specimen from the air and the substrate...

Dynamic SIMS has been used to measure polymer diffusion, e.g. interdiffusion in the PS/PPO system [205], SIMS depth profiling enables to reveal silica present at some 10 nm below the surface. DSIMS has also been used to measure the film thickness of perfluoro-polyether lubricant coated on magnetic recording media by determining the etching time to the underlying carbon overcoat layer [206],... 

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