Abstract: A process for forming a transparent electrode pattern on a substrate such as a glass sheet which constitutes an electro-optical display device such as a liquid crystal display element in which a transparent semi-electrode pattern comprising at least two individual segment electrodes of indium oxide connected to each other without any clearance defined therebetween is formed on one side of said substrate by photo-resist patterning or the like and said semi-electrode pattern is processed by YAG laser ray application so as to provide the clearance between said individual segment electrodes to thereby provide an excellent transparent electrode pattern.