Patent ID: 6436222
Filing Date: 2002-08-20
Classification: G09F,H01L

Abstract:
A method of making an organic (EL) device with a preformed image including text or pictorial information, comprising the steps of:a) providing a light-transmissive substrate; b) providing a light-transmissive anode electrode over the substrate; c) forming an organic EL medium structure over the anode electrode; d) forming a cathode electrode over the organic EL medium structure and bonding a light-transmissive cover structure over the organic EL device; and e) directing a laser beam through the light-transmissive cover structure directly to impinge upon the cathode electrode to remove cathode material from the cathode electrode to form the preformed image, such that when a voltage is applied between the anode and cathode electrodes, light will not be emitted in areas corresponding to the removed cathode material and the preformed image will be observable by a viewer through the light-transmissive substrate.