Patent ID: 8324647

Claim:
A light emitting module comprising: a light emitting device having a light generating region for generating light when activated; a submount comprising a thermally conductive material, the light emitting device being attached to the submount; a wavelength converting element comprising a layer of material capable of absorbing light having a first wavelength generated by the light emitting device and re-emitting light having a second wavelength, the second wavelength being different to the first wavelength; and a conductive element which is arranged to be at least partially in physical contact with the wavelength converting element and at least partially located in a light path of the generated light, the conductive element comprising at least one layer of inorganic material which is thermally conductive, having a thermal conductivity greater than that of the wavelength converting element, and which is optically transparent at the first and second wavelengths, wherein the wavelength converting element and the conductive element form part of a unitary integrated structure with the light emitting device, the layers of the conductive element having been fabricated over the light emitting device using a deposition technique, and wherein the conductive element comprises at least two stacked layers of different inorganic materials which are optically transparent at the first and second wavelengths, said at least one of the at least two stacked layers of inorganic material having a lower thermal conductivity than one or more of the other stacked layers, wherein the conductive element is adapted to be thermally conducting in a plane parallel to the layers of inorganic material and to provide a thermal barrier in a direction perpendicular to the plane.