White light LED chip and manufacturing method thereof

The invention provides a white light LED chip and a manufacturing method thereof. A luminous element is formed on a first substrate, a surface fluorescent material layer is covered on the luminous element, is made of solid materials and is formed by a magnetron sputtering, ion assistant evaporation or electron beam evaporation method, and the thickness of the surface fluorescent material layer ranges from 10 micrometers to 100 micrometers. In conclusion, the white light LED chip and the manufacturing method thereof have the advantages that the surface fluorescent material layer is formed on the luminous element, is made of the solid materials which replace mixture of silicon gel and fluorescent powder in the prior art, and is covered on the luminous element, fluorescent powder is uniform in the concentration and good in color uniformity, accordingly, color temperature uniformity of products in the same batch is improved, and the white light LED chip is consistent in color temperature. Besides, the surface fluorescent material layer is directly arranged on the luminous element, so that white light is emitted in an on-chip manner, and white light production efficiency is greatly enhanced.