Patent ID: 8093077
Filing Date: 2012-01-10
Classification: H01L

Abstract:
1. A method for manufacturing a crack free monocrystalline nitride layer having the composition Al x Ga 1-x N, where 0≦x≦0.3, on a substrate that is likely to generate tensile stress in the layer, which method comprises: forming a nucleation layer on the substrate; forming a monocrystalline intermediate layer of aluminum or gallium nitride at a selected thickness on the nucleation layer; forming a monocrystalline seed layer of an AIBN compound in which the boron content is between 0 and 10% at a selected temperature and thickness on the intermediate layer with the thicknesses of the seed and intermediate layers being in a ratio of between 0.05 and 1; and forming the monocrystalline nitride layer of Al