Patent ID: 7341628

Claim:
A method of improving the crystal quality of a Group III Nitride compound semiconductor layer epitaxially grown on a lattice mismatched substrate comprising: A. providing said Group III Nitride compound semiconductor epitaxial layer and said Group III Nitride compound semiconductor epitaxial layer comprises a top surface; B. placing said layer of said Group III Nitride compound semiconductor material into an electron beam metal deposition tool and depositing a layer of Group III metal component upon said top surface; C. placing said layer of said Group III Nitride compound semiconductor with said deposited layer of said Group III metal component into an ion implantation tool and implanting a Nitrogen component through said Group metal component layer into said Group III Nitride compound semiconductor epitaxial layer, thereby forming a Group III Nitride compound semiconductor layer with an excess of unreacted nitrogen; D. placing said layer of said Group III Nitride compound semiconductor with said deposited Group III metal layer and said implanted Nitrogen component into a directed pulsed electron beam tool and exposing said layers to a pulsed electron beam; wherein said Group III Nitride compound semiconductor layer after exposure to said pulsed electron beam exhibits a reduction of hexagonal pits, an increase in x ray diffraction height and an increase in the crystallite size compared to the as deposited Group III Nitride compound semiconductor layer.