English title

In this paper, the designing and nano-manufacturing of the SnO₂ sensors by the Dip-Coating method is reported to detect CO₂ in a gaseous environment by its characteristic absorption. In addition, in order to prepare the Sol-Gel solution, SnCl₂ as a primary material with different concentration is selected to deposit in diverse thicknesses. After the SnO₂ deposited thin-film with different thicknesses, the electrical characteristic of sensors is obtained with varied both thicknesses and concentration of Co gas. Finally, various measuring of producing gas sensor show suitable sensitivity and quality for Dip-Coating method.