Electrode plate having metal electrodes of aluminum or nickel and copper or silver disposed thereon

An electrode plate, comprising:

• a light-transmissive substrate, a plurality of metal electrodes disposed on the light-transmissive substrate and with spacings therebetween, and an insulating layer disposed at the spacings;
• wherein
• each of the metal electrodes includes a first layer comprising a metal or alloy selected from the group consisting of titanium, chromium, molybdenum, tungsten, aluminum, tantalum and nickel, a second layer comprising copper or silver disposed on the first layer, and a third layer comprising a metal or alloy selected from the group consisting of molybdenum, tantalum, tungsten, titanium, chromium, nickel and zinc and disposed on the second layer;
• said electrode plate further comprising a plurality of transparent electrodes each disposed on and electrically connected to the third layer of an associated one of the metal electrodes and extended over a portion of the insulating layer adjacent to the associated one of the metal electrodes so as to provide a composite electrode structure having a flat surface of the transparent electrode.

A liquid crystal device, comprising:

• a pair of electrode plates and a liquid crystal disposed between the electrode plates;
• at least one of said pair of electrode plates comprising a light-transmissive substrate, a plurality of metal electrodes disposed on the light-transmissive substrate and with spacings therebetween, an insulating layer disposed at the spacings, a plurality of transparent electrodes of indium tin oxide disposed on the metal electrodes and the insulating layer, and an alignment control layer disposed so as to coat the transparent electrodes;
• wherein
• each of the metal electrodes includes a first layer comprising a metal or alloy selected from the group consisting of titanium, chromium, molybdenum, tungsten, aluminum, tantalum and nickel, a second layer comprising copper or silver disposed on the first layer, and a third layer comprising a metal or alloy selected from the group consisting of molybdenum, tantalum, tungsten, titanium, chromium, nickel and zinc and disposed on the second layer;
• said electrode plate further comprising a plurality of transparent electrodes each disposed on and electrically connected to the third layer of an associated one of the metal electrodes and extended over a portion of the insulating layer adjacent to the associated one of the metal electrodes so as to provide a composite electrode structure having a flat surface of the transparent electrode.