Oxidative Chemical Vapor Deposition (oCVD) method is an environmentally friendly surface modification method developed in recent years. The use of very few chemicals with this method allows the acquisition of a wide variety of permanent functional properties in materials. With the OCVD coating applied on polyester yarn, it is aimed to provide the yarn with superior properties such as conductivity as the main purpose, as well as antibacterial properties and water repellency. The lab scale of R&D trials was performed successfully. To goal is to design and develop an industrial roll-to-roll polyester yarn coating system. The yarns to be developed will serve applications in the field of smart and technical textiles.