Patent ID: 9045844
Filing Date: 2015-06-02
Classification: C30B,H01L,Y10T

Abstract:
1. A method of peeling a film of a nitride of a group 13 element, said method comprising the step of: irradiating a laser light to a layered body comprising a seed crystal substrate and a film of a nitride of a group 13 element grown on said seed crystal substrate by flux method from a melt comprising a flux and a group 13 element under nitrogen containing atmosphere, said laser light being irradiated from a side of a back face of said seed crystal substrate to peel said film of said nitride of said group 13 element from said seed crystal substrate, wherein said film comprises an inclusion distributed layer in a region distant by 50 μm or less from an interface of said film of said nitride of said group 13 element on a side of said seed crystal substrate and comprising inclusions derived from components of said melt, and wherein said film comprises an inclusion depleted layer with said inclusion depleted formed on said inclusion distributed layer.