A system for manufacturing an optoelectronic device comprising a plurality of unitary semiconductor functional electronic objects fixed on a receiving face of a light-emitting screen substrate by being distributed over all or part of the free surface of the receiving face, the system comprising: - a positioning mask comprising a body delimiting a cooperation face intended to face the receiving face of the light-emitting screen substrate, and an accommodating face opposite the cooperation face, the body delimiting a plurality of conduits distributed over the surface of the body where each conduit is dimensioned to accommodate a single semiconductor functional electronic object intended to be positioned and fixed on the receiving face and passes through the material constituting the body and opens out on the side of the cooperation face through a first opening and opens out on the side of the accommodating face through a second opening, the section of the first opening being strictly smaller than the section of the second opening; - a supplying unit for freely depositing a set of functional electronic objects on the accommodating face of the positioning mask; - an installation unit for positioning the cooperation face of the positioning mask facing the receiving face of the screen substrate, in a relative position such that the functional electronic objects positioned in the conduits delimited by the body of the positioning mask are in contact with the receiving face of the screen substrate, the conduits delimited by the body of the positioning mask being arranged at predetermined locations corresponding to the locations of the receiving face of the screen substrate where the functional electronic objects of the optoelectronic device are positioned. - a positioning mask comprising a body delimiting a cooperation face intended to face the receiving face of the light-emitting screen substrate, and an accommodating face opposite the cooperation face, the body delimiting a plurality of conduits distributed over the surface of the body where each conduit is dimensioned to accommodate a single semiconductor functional electronic object intended to be positioned and fixed on the receiving face and passes through the material constituting the body and opens out on the side of the cooperation face through a first opening and opens out on the side of the accommodating face through a second opening, the section of the first opening being strictly smaller than the section of the second opening; - a supplying unit for freely depositing a set of functional electronic objects on the accommodating face of the positioning mask; - an installation unit for positioning the cooperation face of the positioning mask facing the receiving face of the screen substrate, in a relative position such that the functional electronic objects positioned in the conduits delimited by the body of the positioning mask are in contact with the receiving face of the screen substrate, the conduits delimited by the body of the positioning mask being arranged at predetermined locations corresponding to the locations of the receiving face of the screen substrate where the functional electronic objects of the optoelectronic device are positioned.