Patent ID: 8507950

Claim:
A method of producing a semiconductor wafer, comprising: placing a base wafer within a reaction chamber; and epitaxially growing a buffer layer made of a p-type Group 3-5 compound semiconductor on the base wafer by supplying, into the reaction chamber, a Group 3 source gas consisting of an organometallic compound of a Group 3 element, a Group 5 source gas consisting of a compound of a Group 5 element, and an impurity gas including an impurity that is to be incorporated as a dopant into a semiconductor to serve as a donor, wherein during the epitaxial growth of the buffer layer, the flow rate of the impurity gas and the flow rate ratio of the Group 5 source gas to the Group 3 source gas are set so that the product N×d (cm −2 ) of the residual carrier concentration N (cm −3 ) and the thickness d (cm) of the buffer layer may be 8.0×10 11 or less.