Patent ID: 9142731
Filing Date: 2015-09-22
Classification: C09K,H01L

Abstract:
1. A method for producing a luminescence conversion substance layer on a substrate with a semiconductor element emitting a primary radiation during operation, the method comprising: providing the substrate; providing a composition comprising a luminescence conversion substance, a matrix material and a solvent; applying the composition to the substrate; and removing at least a part of the solvent, so that the luminescence conversion substance layer is formed on the substrate, the luminescence conversion substance layer having a layer thickness that is equal to, or less than, 60 μm; wherein applying the composition comprises applying a composition with a viscosity of <1 Pa*s during application; wherein applying the composition comprises first completely applying the composition into a recess of the substrate or a recess on the substrate and afterward removing at least a part of the solvent; and wherein before or during removing the solvent, the luminescence conversion substance sediments such that the luminescence conversion substance layer is formed, and the concentration of the luminescence conversion substance, in a matrix comprising the matrix material, has a gradient.