TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The content of sol-gel solution in dielectric ink is 0.1-15 weight%. The weight ratio of auxiliary solvent and main solvent is 70:30-30:70. Preferred Components: The catalyst is chosen from hydrochloric acid, sulfuric acid, and nitric acid. The silicon-containing precursor is silicon-containing precursor (A) having organic functional group, and silicon-containing precursor (B) having transition metal. The silicon-containing precursor (A) is chosen from methyltrimethoxy silane, methyltriethoxysilane, phenyltriethoxysilane, phenyltrimethoxysilane, diphenyl diethylhexyloxydiethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-glycidyloxypropyltrimethoxysilane, vinyltrimethoxysilane, mercaptopropyltrimethoxysilane, vinyltriethoxysilane, mercaptopropyltriethoxysilane, 1H,1H,2H,2H-perfluorodecanethiol and 4-(trifluoromethyl)thiophenol. The silicon-containing precursor (B) is chosen from methyltriethoxysilane, methyltrimethoxysilane, ethyltriethoxysilane, ethyltrimethoxysilane, tetraethylorthosilicate, phenyltriethoxysilane, phenyltrimethoxysilane, diphenyldiethylhexyloxydiethoxysilane, aminopropyltriethoxysilane, aminopropyltrimethoxysilane, diphenylsilanediol, dimethyldimethoxysilane, zirconium ethoxide, zirconium isopropoxide, zirconium propoxide, titanium butoxide, titanium ethoxide, titanium isopropoxide, titanium propoxide, titanium methoxide, tantalum butoxide, tantalum ethoxide, tantalum methoxide, hafnium tert-butoxide and hafnium n-butoxide. The main solvent is chosen from ethyl alcohol, methyl alcohol, isopropyl alcohol, acetone, 2- methoxyethanol, propyl alcohol, pentyl alcohol, hexyl alcohol, butyl alcohol and octyl alcohol. The auxiliary solvent is chosen from ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, hexylene glycol, glycerin, 2- methoxyethanol, propyl alcohol, pentyl alcohol, hexyl alcohol, butyl alcohol, octyl alcohol, formamide, methyl ethyl ketone, dioxane, dimethylformamide, terpinol, polyethylene glycol, ethanolamine and diethanolamine. Preferred Properties: The surface tension of auxiliary solvent and main solvent are different. The viscosity of the auxiliary solvent is more than surface tension and evaporation rate.