Patent ID: 6217665
Filing Date: 2001-04-17
Classification: B08B,H05K,Y10S

Abstract:
A method of producing a liquid crystal device which includes a glass substrate surface having thereon a transparent electrode, said method using pure water as a sole aqueous washing medium and comprising:a first step of providing said glass substrate with said transparent electrode, said substrate surface also having dirt thereon, said dirt comprising at least one of organic matter and inorganic matter and being on said surface prior to washing with any aqueous washing medium, whereina second step of irradiating with ultraviolet rays the glass substrate surface with said transparent electrode and said dirt prior to washing with any aqueous washing medium, said ultraviolet rays including wavelengths of 184.9 nm and 253.7 nm and being applied in an oxygen-containing gas atmosphere, thereby causing oxygen radicals to act on the dirt and the glass substrate provided with said transparent electrode; anda third step following the second step without any intervening step, of washing with said pure water the irradiated glass substrate provided with the transparent electrode and irradiated dirt thereon subjected to action of the oxygen radicals, said washing with said pure water being performed under application of ultrasonic wave.