Abstract: A method of producing a film in accordance with an aspect of the present invention includes: a first kneading and forming step of forming a composition obtained by kneading a polyolefin resin and a plasticizer; a stretching step of stretching the composition; a composition cleaning step of immersing the composition in a cleaning solvent and removing the plasticizer; a separation step of separating, from the cleaning solvent which has been used in the cleaning step, the plasticizer which has been eluted in the cleaning solvent; and a second kneading and forming step of forming a composition obtained by kneading a polyolefin resin and the plasticizer which has been separated in the separation step.

Abstract: A kneading apparatus (21) that makes it possible to easily obtain a kneaded material having a favorable property includes: a screw (23) for extruding polyethylene which has been fed through a feed opening (27); a first heater (24) for heating the polyethylene which is extruded by the screw (23); and a second heater (25) for preheating liquid paraffin which is to be added, through a side-feed opening (28), to the polyethylene which is extruded by the screw (23).

Abstract: A method of producing a film in accordance with an aspect of the present invention includes: a first kneading and forming step of forming a composition obtained by kneading a polyolefin resin and a plasticizer; a stretching step of stretching the composition; a composition cleaning step of immersing the composition in a cleaning solvent and removing the plasticizer; a separation step of separating, from the cleaning solvent which has been used in the cleaning step, the plasticizer which has been eluted in the cleaning solvent; and a second kneading and forming step of forming a composition obtained by kneading a polyolefin resin and the plasticizer which has been separated in the separation step.

Abstract: An object of the present invention is to provide an organic semiconductor composition capable of forming an organic film having high carrier transportability. A preferable organic semiconductor composition contains a lower molecular weight compound and a higher molecular weight compound having carrier transportability, and the solubility parameter of the higher molecular weight compound and the solubility parameter of the lower molecular weight compound differ by 0.6 to 1.5.

Abstract: The invention provides a process for production of a transistor that can form an oriented active layer by a convenient method while yielding a transistor with excellent carrier mobility. The process according to the invention is a process for production of a transistor with an active layer composed of an organic semiconductor compound-containing semiconductor film, the process comprising a step of stretching the semiconductor film and a step of pasting the semiconductor film onto the side on which the active layer is to be formed while heating and/or pressing, to obtain the active layer.

Abstract: The invention provides a process for production of a transistor and an organic semiconductor element which allows satisfactory formation of active layers on desired surfaces, even if the active layers are organic semiconductor compound-containing active layers imparted with prescribed properties beforehand. A preferred mode of the process for production of a transistor is a process for production of a transistor provided with a source electrode and drain electrode, an active layer containing an organic semiconductor compound as a current channel between the electrodes, a gate electrode that controls the current flowing through the current channel and an insulating layer disposed between the active layer and gate electrode, wherein the process includes a pasting step in which a working liquid is situated between the active layer and insulating layer and the active layer and insulating layer are attached together.

Abstract: An object of the present invention is to provide an organic semiconductor composition capable of forming an organic film having high carrier transportability. A preferable organic semiconductor composition contains a lower molecular weight compound and a higher molecular weight compound having carrier transportability, and the solubility parameter of the higher molecular weight compound and the solubility parameter of the lower molecular weight compound differ by 0.6 to 1.5.

Abstract: An object of the present invention is to provide a method for producing an organic semiconductor element allowing depression of electrical properties of active layer to be prevented, moreover allowing an active layer patterned to have a satisfactory pattern shape to be formed. In order to achieve the above object, the method for producing an organic semiconductor element of the present invention has the step of laminating a layered body resulting from lamination of a support film and the active layer to an element substrate on which the active layer will be disposed so that the active layer of the layered body will be in contact with the element substrate, the step of forming a mask having a prescribed pattern shape on the support film's surface located on the side opposite to the active layer, and the step of patterning the active layer by removing the layered body located in a region where the mask has not been formed.

Abstract: The invention provides a process for production of a transistor and an organic semiconductor element which allows satisfactory formation of active layers on desired surfaces, even if the active layers are organic semiconductor compound-containing active layers imparted with prescribed properties beforehand. A preferred mode of the process for production of a transistor is a process for production of a transistor provided with a source electrode and drain electrode, an active layer containing an organic semiconductor compound as a current channel between the electrodes, a gate electrode that controls the current flowing through the current channel and an insulating layer disposed between the active layer and gate electrode, wherein the process includes a pasting step in which a working liquid is situated between the active layer and insulating layer and the active layer and insulating layer are attached together.

Abstract: The invention provides a process for production of a transistor that can form an oriented active layer by a convenient method while yielding a transistor with excellent carrier mobility. The process according to the invention is a process for production of a transistor with an active layer composed of an organic semiconductor compound-containing semiconductor film, the process comprising a step of stretching the semiconductor film and a step of pasting the semiconductor film onto the side on which the active layer is to be formed while heating and/or pressing, to obtain the active layer.