METHOD AND APPARATUS FOR APPLYING A SUBSTANCE TO A SUBSTRATE

摘要

A method for depositing a layer of an active substance on a substrate (2), wherein the active substance is chosen from the group of substances consisting of an alkali metal, an alkali earth metal, a lanthanide, or an alloy or intermetallic mixture of one or more of the said alkali metal, alkali earth metal or lanthanide elements, characterized in that the active substance is bound in a compound which is stable at room temperature, wherein the compound is incorporated in a wire (4), which wire forms a connection between two electrodes (5,6), wherein, for releasing the active substance, a current (7) is fed through the wire, so that it heats up to a temperature at which the compound decomposes and the active substance evaporates and then precipitates on the substrate. Further, an apparatus is described for carrying out the method.