Transparent zinc oxide (ZnO) films had been chemically deposited on nonconductive glass from aqueous solutions containing zinc nitrate and dimethylamine-borane (DMAB) kept at 323 K. The ZnO films had a wurtzite structure and exhibited an optical bandgap energy of 3.3 eV which is characteristic of ZnO. A 0.2 mu m thick ZnO film with an optical transmittance of 80% was deposited by immersion for approximately 20 min in an aqueous solution containing 0.05 mol/liter zinc nitrate and 0.05 to 0.1 mol/liter DMAB.