Patent ID: 8709530

Claim:
A pattern forming method, comprising: rolling a printing roller coated with a pattern material on a printing plate including embossing and depressed patterns therein, to make some of the pattern material left on the printing roller; rolling the printing roller having the pattern material left thereon on a substrate, to transcribe the pattern material to the substrate; transferring a cleaning unit including a cleaning dry film, a film-supplying roller, a cleaning roller, and a film-collecting roller to be positioned above the printing plate, where the cleaning dry film, the film-supplying roller, the cleaning roller, and a film-collecting roller being closed by lower and upper surfaces and sidewalls of the cleaning unit when transferring the cleaning unit, while the cleaning unit is in between an initial position and the printing plate, both ends of the film-supplying roller and the film-collecting roller being fixed to the sidewall of the cleaning unit; and cleaning the printing plate by using the cleaning dry film of the cleaning unit when the lower surface of the cleaning unit is opened, wherein cleaning the printing plate by using the cleaning dry film of the cleaning unit comprises: supplying the cleaning dry film of the film-supplying roller to the cleaning roller, rotating the film-supplying roller, the cleaning roller and the film-collecting roller respectively in same direction and simultaneously rolling the cleaning dry film supplied to the cleaning roller on the printing plate from one side to other side thereon, to make the pattern material of the printing plate stick to the cleaning dry film, and collecting the cleaning dry film, to which pattern material sticks, by using the film-collecting roller, wherein the cleaning dry film is formed of a film containing adhesive high molecular compound, wherein the adhesive high molecular compound is formed of mixture of acrylic resin and epoxy resin, wherein the cleaning roller has a smaller diameter than the printing roller, and wherein the cleaning roller has wider diameter than a line width of the depressed patterns.