NOVELTY - The method involves dispensing a reactive solution e.g. slurry, on a substrate (120), where the slurry solution is evaporated leaving behind a particulate film. The solution is spread with a hydrophilic material (130) i.e. ceramic rod, where the hydrophilic material is suspended above the substrate. The substrate and the hydrophilic material are moved relative to one another. A continuous liquid is dispensed on the substrate. The liquid and the substrate are pre-heated. The solution is removed by pulling the solution through the substrate and by evaporation.    USE - Method for making a thin film e.g. polycrystalline thin film such as cadmium sulfide thin film, on a substrate using a hydrophilic material i.e. ceramic rod, utilized for photovoltaic application.    ADVANTAGE - The method enables producing thin film-generating solution using a micro- mixer and a microchannel heat exchanger and employing the hydrophilic material by a liquid coating technique so as to efficiently and uniformly apply reactive solution to large substrates, thus facilitating production of consistent and repeatable thin films in an efficient manner. The method enables coating substrate with reactant solution, so that the substrate can be held at constant temperature when the cadmium sulfide thin film grew from the reagents in the liquid, thus avoiding substrate dry-out and achieving required thickness of the cadmium sulfide film by requiring multiple passes of dispensing and dwell time, and hence obtaining uniform, continuous, and particle-free cadmium sulfide film by rinsing the cadmium sulfide film deposited on the glass substrate with water.    DETAILED DESCRIPTION - The substrate is made of glass, metal, plastic, ceramic and semiconductor material. The ceramic rod is made of alumina, zirconia, oxide ceramic and non-oxide ceramic. The solution is a polar liquid stream and the slurry.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a structure for making a thin film that shows a solution stretching into a thin layer after contacting a hydrophilic material.    Substrate (120)    Hydrophilic material (130)    Thin layer (140)