The diazo resin is, for example, organic solvent soluble diazo resin inorganic salt, which is a reactive product from a condensate of p-diazodiphenylamine and aldehyde such as hormaldehyde and acetaldehyde and hexafluoro phosphoric acid or tetrafluoro boric acid; or organic solvent soluble diazo resin organic salt which is a reactive product between the condensate of Japanese Patent Publication No