Patent ID: 6335218
Filing Date: 2002-01-01
Classification: H01L,H01S

Abstract:
A method of producing a group III nitride semiconductor device, comprising the steps of:forming a first crystal layer by a metalorganic chemical vapor deposition method made of a group III nitride semiconductor (AlxGa1âˆ’x)1âˆ’yInyN (0&lE;x&lE;1, 0&lE;y&lE;1) doped with a group II impurity element; forming a second crystal layer by a metalorganic chemical vapor deposition method made of a second group III nitride semiconductor AlzGa1âˆ’zN (0.7&lE;z&lE;1) onto the first crystal layer; and removing at least a part of the second crystal layer by etching after the formation of the first and second crystal layers; wherein a nitrogen precursor in the metalorganic compound chemical vapor deposition method is ammonia, and the amount of ammonia supplied into the reactor vessel is set much lower during the growth of the second crystal layer and the subsequent cooling step or during the cooling step alone than that for the growth of the first crystal layer.