an apparatus adapted for depositing one or more polymeric materials on the surface of a substrate , which apparatus includes a polymerization chamber ; an inlet for admitting a glow discharge polymerization precursor into the polymerization chamber ; a first conductive member extending into the polymerization chamber ; a first conductive support attached to the first conductive member for holding a substrate ; a power generator arranged for transmitting electrical energy to the first conductive member ; a second conductive member on or within the polymerization chamber , the second conductive member being spaced and insulated from the first conductive member ; and a pump arranged for applying a vacuum to the polymerization chamber ; whereby a glow discharge zone is established within the polymerization chamber when a vacuum is applied thereto and electrical energy from the first conductive member is received by the second conductive member . also disclosed are a process of depositing polymeric materials on the surface of a substrate , which can be conveniently practiced using the above - described apparatus , and a product thereof .