Patent ID: 8728237

Claim:
A crystal growth method for nitride semiconductors, comprising: growing a first semiconductor layer containing In x Ga 1-x N (0<x≦1) on a substrate at a first growth temperature, with the use of a first carrier gas formed with an inert gas; growing a second semiconductor layer containing In y Ga 1-y N (0≦y<1, y<x) on the first semiconductor layer at a second growth temperature higher than the first growth temperature, with the use of a second carrier gas containing the inert gas and H 2 gas, an amount of the H 2 gas being smaller than an amount of the inert gas; and growing a third semiconductor layer containing In z Ga 1-z N (0≦z<1, z<x) on the second semiconductor layer at the second growth temperature, with the use of a third carrier gas containing the inert gas and H 2 gas, an amount of the H 2 gas in the third carrier gas being a smaller than the amount of H 2 gas in the second carrier gas.