Patent ID: 8336489
Filing Date: 2012-12-25
Classification: C23C

Abstract:
1. A thermal evaporation apparatus for depositing a material on a substrate, the apparatus comprising: material storage means for receiving the material to be deposited, wherein at least the surfaces of the material storage means arranged to come into contact with vapour of the material to be deposited are constructed of a material selected from the group consisting of quartz, fused silica, ceramic, graphite and carbon-fibre-enforced-carbon (CFC); heating means for heating the material in the material storage means to generate a vapour; vapour outlet means arranged to receive in its interior said vapour, said vapour outlet means comprising: pipe heating means arranged in the interior of said vapour outlet means, said pipe heating means being provided with an outer corrosion-resistant surface arranged to come into contact with the material vapour and being formed of a material selected from the group consisting of quartz, fused silica, ceramic, and graphite.