NOVELTY - Fuel cell is composed of a half-cell including a nanoporous catalytic electrode permeable to a fuel gas, and a negative half-cell. Each half-cell is formed on a substrate which could be semi-insulating silicon or glass or a thin film of Mylar. The cell may be controlled by an application integrated specific circuit which is formed at the same time to control and configure the cell.    USE - The fuel cell, i.e. membraneless microchannel fuel cell, is used for generating electricity, or in an electrolysis mode can produce gases, e.g. hydrogen and oxygen.    ADVANTAGE - The use of nanostructured materials for the electrodes makes the whole system work at increased efficiencies for a reasonable cost. The invention enables the incorporation of application specific integrated circuits into the normal fuel cell manufacturing flow, thus allowing the fuel cell to be reconfigured for different voltages, and allowing the fuel cell to fix broken cells to continue to deliver voltage even of one cell is damaged.    DETAILED DESCRIPTION - Fuel cell is composed of a half-cell comprising a nanoporous catalytic electrode permeable to a fuel gas and connected through parts of the half-cell to an electric load circuit, a negative half-cell comprising a nanoporous catalytic electrode permeable to an oxygen containing gas (102) and its products of the electrodic reaction and connectable through parts of the half-cell to the electrical load circuit of the cell, a cation exchange membrane (104) separating the electrodes, mechanism for feeding the fuel gas to the catalytic electrode of the positive cell, and mechanism for feeding oxygen containing gas to the catalytic electrode of the negative half-cell and for exhausting products f the electric reaction. Each half-cell is formed on a substrate which could be semi-insulating silicon or glass or a thin film of Mylar. the cell may be controlled by an application integrated specific circuit which is formed at the same time using compatible methods to control the cell and configure electronically the cell. An INDEPENDENT CLAIM is also included for a method for forming the electrodic thin film material by thin film deposition and liftoff or through thin film deposition and etch back.    DESCRIPTION OF DRAWING(S) - The figure is a schematic cross section of a micro fuel cell made on a substrate.    Hydrogen feed (101)    Oxygen containing gas (102)    Electrodic thin film (103)    Cation exchange membrane (104)    Nanoparticles of platinum (105)