NOVELTY - A fuel cell having micro sensors (60) and polymer layers is made by preparing first film-electrode (21) having working surface (211) and depositing first polymer layer (30) on working surface; coating first photoresist layer (40) on first polymer layer by lithographic processing technology; depositing chromium layer (50) on first photo-resist layer; depositing gold layer on chromium layer; depositing second polymer layer on first blocking layer and gold layer; coating second photo-resist layer on second polymer layer; and conducting plasma etching on exposed portion of second polymer.    USE - Method for manufacture of fuel cell having micro sensors and polymer layers.    ADVANTAGE - The method provides fuel cell having micro sensors and polymer layers. The polymer layers can protect the micro sensors and the micro sensors can be installed at a specific location in a flow channel. This reduces manufacturing cost. The polymer layers reduces the possibility of the micro sensors to be rusted, corroded, or interfered by water droplets or damp gas; and can increase the life and accuracy of the micro sensors. The locations of these micro sensors can be arranged in advance for detecting desired points in the flow channel inside the fuel cell. If one of the micro sensors is out of order, a user can replace a new set of the film-electrodes instead, thus its maintenance work becomes easy.    DETAILED DESCRIPTION - The manufacture of fuel cell having micro sensors (60) and polymer layers involves:    (A) preparing first film-electrode (21) made by silicon-based material and having a working surface (211), and depositing first polymer layer (30) on working surface;    (B) coating first photoresist layer (40) on first polymer layer by lithographic processing technology, the first photoresist layer having a first pattern, and the first polymer layer including first exposed portion (31) and first blocking portion (32);    (C) depositing chromium layer (50) on the first photo-resist layer and first exposed portion of the first polymer layer to a predetermined thickness;    (D) depositing gold layer (61) on the chromium layer;    (E) removing the first photo-resist layer on the first blocking layer of the first polymer layer;    (F) depositing second polymer layer (70) on the first blocking layer and the gold layer;    (G) coating second photo-resist layer (80) on the second polymer layer by lithographic processing technology, the second photo-resist layer having second pattern, and the second polymer layer including second exposed portion (71) and second blocking portion (72);    (H) conducting plasma etching on the second exposed portion of the second polymer for etching downward, and forming metal connecting portions (81) that connect with the gold layer;    (I) removing the second photo-resist layer; and    (J) disposing lead lines to connect with the metal connecting portions, assembling second film-electrode, and assembling pair of bipolar plates, in which the first and second film-electrodes are sandwiched by the bipolar plates, so that a fuel cell having micro sensors and polymer layers is formed.    DESCRIPTION OF DRAWING(S) - The drawing is a flow chart showing the manufacturing method of the fuel cell.    First film-electrode (21)    First polymer layer (30)    First exposed portion (31)    First blocking portion (32)    First photoresist layer (40)    Chromium layer (50)    Micro sensors (60)    Gold layer (61)    Second polymer layer (70)    Second exposed portion (71)    Second blocking portion (72)    Second photo-resist layer (80)    Metal connecting portions (81)    Working surface (211)