This work focuses on describing the precursor approach to conjugated polymer network thin films: synthesis, electrodeposition, patterning, and applications. The preparation of "smart coatings" involves the use of new materials and mechanism towards common applications. By targeting the preparation and deposition of nanostructured ultrathin and optically homogeneous conjugated and electrically conducting polymer materials, it should be possible to develop new and smart coating applications. This includes anti-static, anti- corrosion, electrochromic, and display applications. The use of precursor-polymers is described based on the synthesis of a passive or active polymer backbone bearing electro-active monomer groups. These in turn can be electrodeposited or cross-linked by oxidative chemical methods to form ultrathin film coatings. A number of approaches will be described in this chapter including the use of surface sensitive spectroscopic and microscopic methods for analysis and patterning of these films.