method can also be used in which the fluorine containing polyhydroxyamide represented by the general formula 2 is obtained wherein the ring is either not closed or only partially closed by reacting the dicarboxylic acid with the bis aminophenol component in organic solvent at a temperature of u2212 20 to 80 u00b0 c in addition when an inorganic salt e g lithium chloride or calcium chloride or base is added to the reaction system of the dicarboxylic acid and the bis aminophenol compound intramolecular hydrogen bonding of the bis aminophenol component is inhibited thereby allowing reactivity to be enhanced as a result of selectively reacting the dicarboxylic acid with amino group of the bis aminophenol the fluorine containing polyhydroxyamide or partially closed ring containing polyhydroxyamide can be converted to the polybenzoxazole by closing the ring completely through the addition of a cyclization agent such as acid anhydride e g acetic anhydride propionic anhydride and benzoic anhydride or dicyclohexylcarbodiimide and a cyclization catalyst such as pyridine isoquinoline trimethylamine aminopyridine or imidazole if necessary at a temperature of 100 u00b0 c or higher and preferably a temperature of 150 u00b0 c or higher there are no particular restrictions on organic solvents that can be used in the polymerization for producing the polybenzoxazole or its precursor so long as it dissolves both starting materials that is the dicarboxylic acid and the bis aminophenol.