A wafer transfer with a structure for mapping a wafer and a method for mapping the wafer loaded in a boat using the same are provided to reduce an apparatus size and to simplify an apparatus structure by detecting a wafer loading state of the boat using a conventional wafer transfer without an additional apparatus. A wafer transfer includes a head, a horizontal transfer unit, a spin driving unit, a vertical driving unit, a sensing unit, and a control unit. The head(10) includes fingers vertically spaced apart from each other. The horizontal transfer unit(20) is connected with the head in order to freely move the head on X-Y plane. The spin driving unit(30) is connected with the horizontal transfer unit in order to rotate the horizontal transfer unit on the X-Y plane. The vertical driving unit(40) is connected with the spin driving unit in order to move the spin driving unit up and down in a Z-axis direction. The vertical driving unit includes a detecting part capable of detecting the height of the spin driving unit. The sensing unit is installed at one end of one finger in order to detect a wafer loading state of a boat. The control unit is used for controlling a detection point of the sensing unit and determining a detection end point of the sensing unit.
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