NOVELTY - A sputter target contains a compound which includes additional element (X) excluding zinc and oxygen and/or additional element which does not contain oxygen, and is used for forming zinc oxide membrane having zinc oxide as main component. The compound of additional element (X) is solid at normal temperature and pressure.    USE - Sputter target is used for zinc oxide membrane for solar cell and display element (both claimed) such as liquid crystal display, plasma display and organic light emitting diode element and optoelectronic element.    ADVANTAGE - The sputter provides membrane having improved electrical property, stability and expansion adaptability in high productivity.    DETAILED DESCRIPTION - A sputter target contains a compound which includes additional element (X) excluding zinc and oxygen and/or additional element which does not contain oxygen, and is used for forming zinc oxide membrane having zinc oxide as main component. The compound of additional element (X) is solid at normal temperature and pressure.    X=boron, aluminum, gallium, indium, carbon, silicon, germanium, tin, scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, yttrium, zirconium, niobium, molybdenum, technetium, ruthenium, rhodium, palladium, silver, hafnium, tantalum, tungsten, rhenium, iridium, platinum, gold, lithium, sodium, potassium, rubidium, cesium, beryllium, magnesium, calcium, strontium, barium, nitrogen, phosphorus, arsenic, antimony, sulfur, selenium, tellurium, fluorine, chlorine, bromine and/or iodine.    INDEPENDENT CLAIMS are included for the following:    (1) display element, which has a pair of substrate, liquid-crystal layer provided between the substrates, pair of polarizing plate which clamps the substrate and transparent electrode with zinc oxide membrane having zinc oxide as main component provided to the substrate(s); and    (2) solar cell, which has a substrate, and transparent electrode, amorphous-silicon thin film, polycrystalline-silicon thin film and back electrode sequentially provided on the substrate.    DESCRIPTION OF DRAWING(S) - The drawings show a schematic view of block diagram of target material for formation of zinc oxide membrane.    Zinc oxide target (1)    Zinc oxide particles (2)    Additional elements not in oxide state (3)    Additional elements in oxide state (4)