Optical memory device based on dhflc material and method of preparing the same

Abstract

The invention relates to an optical memory device and method for the preparation of the optical memory device based on glycerol, a very common and versatile solvent, mixed deformed helix ferroelectric liquid crystal (DHFLC) having applications in ferroelectric liquid crystal based devices, the said method comprising the steps of forming patterns of different shapes and configurations by lithographic methods to obtain an effective electrode area of at least 4.5 mm on a glass substrate coated with indium tin oxide; depositing the patterned glass substrate with a polymer nylon 6/6 in the thickness range of 200 Å-400 Å; baking the coated substrate followed by hard rubbing of the polymer coated surface using buffing machine; photo lithographically developing spacer to maintain a uniform thickness of 3¼ m; filling glycerol mixed deformed ferroelectric liquid crystal material in the space between the coated glass substrates, followed by sealing the sandwiched glass substrates at the periphery; heating and cooling the sandwiched glass substrates, followed by application of electric field across the sandwiched substrates for achieving the stable memory action and fastness of the response, by applying an AC and DC field across the device to obtain an optical memory device.