Spin coating technology

Using conventional spin-coating technology, phase-matching has been demonstrated with a 2 layer core structure made of DANS doped polycarbonate and polyetherimide over 7 mm of propagation [90]. 

The thickness of the film obtained is directly proportional to the concentration of the nanocomposite solution or suspension. This method is advantageous since the thickness of the polymer-coated film on the electrode can be known from the original concentration of polymer solution and droplet volume. This technology is rather simple and there is no waste of material like spin-coating technology. However, the resulting film is usually not uniform and controlling of thickness for the film is very difficult. Moreover, the quality and thickness of polymer film formed by... 

Organic coatings are also possible. The classic example is the paralene process where a cyclic dimer of p-xylene is thermally decomposed at about 850°C to form /i-xylene free radicals that polymerize into a conformal film when deposited on a solid surface. Other examples of polymerization from a deposited vapor have been developed, and advocates believe that this technology will replace spin coating of silicon wafers. 

Palladium acetate, [PdO —02CCH3)2l3, possesses a unique quality that makes it attractive for solid state decomposition studies as well as technological applications. It can be spin-coated from solution to form a homogeneous, apparently amorphous solid film. This provides large uniform areas over which we can study the effects of various irradiation sources on the chemical nature of the film. The bulky structure of palladium acetate, shown in Figure 1 (8), may offer a partial explanation of the molecule s ability to achieve an amorphous metastable phase upon rapid evaporation of solvent. 

Mitzi, D. B. Copel, M. Murray, C. E. Kosbar, L. L. Afzali, A. 2005. Thin-film transistors based on spin-coated chalcogenide semiconductor channels. Proceedings—Electrochemical Society, 2004-15 (Thin Film Transistor Technologies (TFTT VII)). pp. 189-199. 

Spin coating utilizes centrifugal forces created by a spinning substrate to spread a liquid evenly over its surface. Current applications are in photoresist technology for the microelectronic industry and in the manufacture of... 

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