Abstract: A method for forming a protrusion by masking includes a mask formation step for forming a mask layer on a base material; an etching step for etching an area in which a mask is not formed on the base material, and a mask removal step for removing the mask layer. The mask formation step includes a step for forming at least one small mask, and a step for forming at least one big mask.

Abstract: The method for forming nano size turfs on a surface of a transparent polymer film used in a solar cell is disclosed, which comprises a first step for attaching a transparent polymer film on a glass, a second step for installing the glass prepared in the first step on an upper side of the electrodes provided in the interior of a chamber and forming either a vacuum environment or an atmospheric environment, and a third step for supplying an electric power to the electrodes under the environment formed in the second step, etching the transparent polymer film attached on the surface of the glass and forming nano size turfs in circular cone shapes.

Abstract: The method for forming nano size turfs on a surface of a transparent polymer film used in a solar cell is disclosed, which comprises a first step for attaching a transparent polymer film on a glass, a second step for installing the glass prepared in the first step on an upper side of the electrodes provided in the interior of a chamber and forming either a vacuum environment or an atmospheric environment, and a third step for supplying an electric power to the electrodes under the environment formed in the second step, etching the transparent polymer film attached on the surface of the glass and forming nano size turfs in circular cone shapes.

Abstract: Provided are ultra water repellent film manufacturing equipment capable of continuous manufacturing of an ultra water repellent film through casting and separating a hydrophilic or hydrophobic polymer on an outer surface of a rotating belt, and an ultra water repellent film manufacturing method using the equipment. The equipment includes the rotating belt wound around rollers to continuously rotate, a polymer supplying member (120) containing a liquid polymer (M) to supply onto the rotating belt (110), a thickness controlling member (130) for controlling the supplied liquid polymer in thickness, a polymer drying member (140) for drying the liquid polymer controlled in thickness, a film separating member (150) for separating an ultra water repellent film (F) from the rotating belt, a rotating belt cleaning member (160) for cleaning an outer surface of the rotating belt after film separation, and a surface reforming member (170) for reforming the outer surface of the cleaned rotating belt.