(JP10074527-A)      A polymer electrolyte membrane fuel cell comprises polymer electrolyte membranes, gas diffusion electrodes sandwiching the membranes, and bipolar plates operating as gas separation plates and current collectors with fuel/oxidising agent supply and discharge passages, wherein the bipolar plate has a frame of melt-processable polymer of good fluidity and high acid and hydrolytic resistance, and a carbon plate or corrosion-resistant conductive plate integrally moulded into the frame, wherein the plate has concave and convex parts on both surfaces which provide the fuel/oxidising agent supply and discharge passages when the bipolar plate contacts the gas diffusion electrodes.    USE -   For direct generation of electrical energy from fuel and an oxidising agent.    ADVANTAGE -   The bipolar plate is easily made at reduced manufacturing cost. It has high resistance against corrosive electrolyte, good current collection function, a high degree of structural integrity, high strength, high elasticity, good dimensional stability and good core properties.    (EP909465-A1)      A polymer electrolyte membrane fuel cell comprises polymer electrolyte membranes, gas diffusion electrodes sandwiching the membranes, and bipolar plates operating as gas separation plates and current collectors with fuel/oxidising agent supply and discharge passages, wherein the bipolar plate has a frame of melt-processable polymer of good fluidity and high acid and hydrolytic resistance, and a carbon plate or corrosion-resistant conductive plate integrally moulded into the frame, wherein the plate has concave and convex parts on both surfaces which provide the fuel/oxidising agent supply and discharge passages when the bipolar plate contacts the gas diffusion electrodes.    USE -   For direct generation of electrical energy from fuel and an oxidising agent.    ADVANTAGE -   The bipolar plate is easily made at reduced manufacturing cost. It has high resistance against corrosive electrolyte, good current collection function, a high degree of structural integrity, high strength, high elasticity, good dimensional stability and good core properties.