Patent ID: 6642075
Filing Date: 2003-11-04
Classification: H01S

Abstract:
A method for manufacturing a semiconductor laser device comprising:sequentially laminating on a semiconductor substrate of a first conductivity type, a first cladding layer of a first conductivity type, an active layer, a first second cladding layer of a second conductivity type, a semiconductor layer of the second conductivity type with an index of refraction different from the index of refraction of the second cladding layer, and a second second cladding layer of the second conductivity type; forming a first insulating film of a Si-based substance on the second second cladding layer, and forming, with the first insulating film, a first insulating film pattern with a plurality of first openings which have a strip shape having a length in a direction intersecting an optical wave guide, and arranged at an interval having a predetermined distance along the optical wave guide; forming a second insulating film of a Si-based substance over the semiconductor substrate through the first insulating film pattern, and forming with the second insulating film, through the first insulating film pattern, a second insulating film pattern with a second opening which has a strip shape extending along the optical wave guide, and which has a width narrower than the length of the first opening in the direction intersecting the optical wave guide; etching the second second cladding layer and the semiconductor layer using the second insulating film pattern and the first insulating film pattern as masks to form a third opening passing through the semiconductor layer; and removing the second insulating film pattern and the first insulating film pattern, and filling the second second cladding layer and the semiconductor layer through the third opening with a third second cladding layer of the second conductivity type.