Patent ID: 7455888

Claim:
A method for forming a catalyst layer on a substrate constituting a membrane electrode assembly, whereby a catalyst layer is formed by allowing electrode powder to disperse by electrostatic force and extruding force to the substrate, comprising: providing a screen having a mesh facing a substrate in a state of non-contact; disposing an elastic body in a state of contact with a surface of the screen to supply the electrode powder to the screen; applying voltage between the screen and the substrate so as to electrically charge the electrode powder supplied to the screen and to generate an electric field between the screen and the substrate in which the electrically charged electrode powder moves; pressing the electrode powder supplied to the screen by the elastic body towards the screen and deforming the elastic body while being pressed against the screen to allow the elastic body to at least partly enter into the mesh of the screen so as to exude the electrode powder through the mesh of the screen towards the substrate; and dispersing the electrode powder towards the substrate so as to adhere thereto by the electrostatic force and the extruding force of the elastic body.