THERMAL EVAPORATION APPARATUS, USE AND METHOD OF DEPOSITING A MATERIAL

Thermal evaporation apparatus for depositing of a material on a substrate, comprising material storage means; heating means to generate a vapour of the material in the material storage means; vapour outlet means comprising a vapour receiving pipe having vapour outlet passages, and emission reducing means arranged such that an external surface of the vapour outlet means directed to said substrate exhibits low emission, and wherein the apparatus further comprises pipe heating means in the interior of said vapour outlet means, wherein at least the surfaces of the material storage means, heating means, and emission reducing means and pipe heating means arranged to come into contact with the material vapour are of a corrosion-resistant material. Further a thermal evaporation apparatus for depositing a material on a substrate comprising a vapour outlet means arranged to receive in its interior the vapour of the material heated in a material storage means and having vapour outlet passages, wherein said vapour outlet means basically consist of a corrosion-resistant material and are gastight to such an extent that sufficient dynamic pressure of said material vapour is achievable for homogenous deposition of said material on said substrate. Also the use of the apparatus, and a method of depositing a material onto a substrate by thermal evaporation.