(JP6290798-A)      Planar solid electrolyte fuel cell comprises: (i) several separator plates (11) made of metal each having a branch part (40) and a reaction part (42) surrounding the branch, the branch part being equipped with two reaction gas inlet holes (4,5) and the reaction part having 1st guide walls (19A) on one surface and 2nd guide walls (19b) on the other surface to fed and distribute gases; (ii) several unit cells (33), each in the form of an annular plate and equipped with an anode (1), a solid electrolyte (3) and cathode (2) lying over each other, in which each unit is enclosed by two separator plates (11); (iii) several electrical insulators (21) arranged on the centre part of the plates (11) and equipped with two through-holes aligned with the reaction gas guide holes (4,5) and extending in direction of the plates (11), in which the insulators (21) and separators (11) are arranged over one another using the branch parts of the separators; (iv) 1st gas sealing parts (6A) arranged between the branch parts of the separators and electrical insulators and act to restrain each reaction gas guide holes (4,5); and (v) 2nd gas sealing parts (6B) between each peripheral sections of cells (33) and each reaction part (42) of the separator plates (11) enclosing the cells.    ADVANTAGE -   Relatively high thermal reliability.    (US5399442-A)      Planar solid electrolyte fuel cell comprises (a) metallic separator plates each including (i) a manifold part with 1st and 2nd gas introduction holes for 1st and 2nd reaction gases, and (ii) a reaction part surrounding the manifold part with 1st and 2nd guide vanes on respective separator plates, for guiding the respective gases, (b) annular unit cells each including an anode, a solid electrolyte and a cathode superimposed on one another, each cell interposed between two separator plates, (c) electric insulators on the manifold part with 1st and 2nd holes for the respective gases, (d) 1st gas seal parts between the manifold part and electric insulator, and (e) 2nd gas seal parts between respective peripheries of the unit cells and the parts of the separator plates.    ADVANTAGE -   Improved thermal reliability and stability of the gas seal.