A method for minimizing program disturb in Flash memories. The ink is capable of preventing the pH of the ink from being shifted to the acidity side due to corrosive substances generated by deterioration of ink, adverse effects due to water absorption and moisture absorption, or degradation of resin, thus preventing erosion of a head nozzle member. A cathode is disposed in the tube opposing the anode configured to produce electrons accelerated towards the anode in response to an electric field between the anode and the cathode. A merged document object model built from the refined merged node list is transformed into a hypertext mark-up language document. The contact angle and the admittance are determined depending on a temperature of the nickel acetate solution and a sealing time.