Patent ID: 8039174

Claim:
A method of manufacturing a micro fuel cell comprising: forming through holes for flow paths of the fuel cell in a thermoplastic polymer film by a process selected from a group consisting of laser drilling, etching and lithography, coating a metal layer on an inner side surface of the thermoplastic polymer film, and filling the through holes with a fuel diffusion material and a catalyst to provide an anode; repeating the forming to provide a cathode; and placing the anode and the cathode to oppose each other, disposing a cation conducting polymer membrane between the anode and the cathode, and hot-pressing the anode, the cation conducting polymer membrane and the cathode, wherein the forming the through holes comprises: forming grooves in a side of the film in a depth that is ½ of a thickness of the film, and grooving in the other side of the film, in areas corresponding to the grooves formed first, thereby completing the through holes, wherein each of the through holes has a first diameter at an outer side and a second diameter at the middle of a thickness direction of the film, the first diameter greater than the second diameter to have an inner surface sloped with respect to the surface of the film.