Patent ID: 7148129

Claim:
A method of growing a semiconductor layer in a selective area by MOCVD (Metal Organic Chemical Vapor Deposition), comprising the steps of: (a) forming a first mask pattern on a semiconductor substrate having a (100) crystalline plane; (b) forming a second mask pattern adjoining a first window and a window adjacent to the first mask pattern, wherein the first window represents the selective area, and wherein the window adjacent to the first mask pattern separates the second mask pattern from the first mask pattern and comprises a second window and a third window, the second and third windows corresponding to a blocking area for blocking the surface migration of a III-group semiconductor source gases at edges of the third window; (c) forming a trench by etching the semiconductor substrate exposed by the window adjacent to the first mask; and (d) growing the semiconductor layer having a trapezoidal shape by MOCVD on the semiconductor substrate exposed by the first window and the trench adjacent to the first mask pattern.