Patent ID: 8637329

Claim:
A method for producing a semiconductor optical integrated device, comprising the steps of: forming a substrate product including a first stacked semiconductor layer portion and a second stacked semiconductor layer portion that are arranged in a predetermined direction; forming a first mask on the first and second stacked semiconductor layer portions, the first mask including a first pattern region and a second pattern region, the first pattern region having a stripe shape that extends in the predetermined direction, the second pattern region including a first side edge and a first end edge, the first side edge facing a portion of the first pattern region arranged on the second stacked semiconductor layer portion, and the first end edge extending in a direction crossing the predetermined direction; forming a stripe-shaped mesa structure by etching the first and second stacked semiconductor layer portions with the first mask; removing the second pattern region of the first mask to expose a surface of the second stacked semiconductor layer portion; forming a second mask on the second stacked semiconductor layer portion, the second mask covering the upper portion and both side surfaces of the stripe-shaped mesa structure in the second stacked semiconductor layer portion; selectively growing a buried semiconductor layer on both side surfaces of the stripe-shaped mesa structure in the first stacked semiconductor layer portion with the first and second masks; and forming a resin region on both side surfaces of the stripe-shaped mesa structure in the second stacked semiconductor layer portion, wherein the second mask includes a second end edge separated from the first end edge of the first mask, the second end edge being located on the side of the second stacked semiconductor layer portion in the predetermined direction with respect to the first end edge of the first mask.