Patent ID: 8216868

Claim:
A method of fabricating a semiconductor laser, comprising the steps of: forming a substrate product, the substrate product including a first region, a second region, and first and second scribe marks, the first region including plural device sections, the second region including a protrusion structure without the plural device sections, each device section including the semiconductor laser, the plural device sections being arranged in a direction of a first axis and a direction of a second axis, the direction of the first axis being different from the direction of the second axis, the second region extending in the direction of the first axis, the first and second scribe marks being provided in at least one of the first region and the second region, the first and second scribe marks being provided on first and second reference lines, respectively, and the first and second reference lines defining boundary of the plural device sections and extending in the direction of the second axis; sandwiching the substrate product between films; performing a first cleavage of the substrate product by use of the first scribe mark to form a first laser bar and another substrate product, the first laser bar and the other substrate product being sandwiched by the films, and; performing a second cleavage of the other substrate product by use of the second scribe mark to form a second laser bar and still another substrate product, the second laser bar and still other substrate product being sandwiched by the films; wherein the protrusion structure is provided on the first and second reference lines, wherein the second cleavage of the other substrate product is carried out by pressing the other substrate product located between the films, wherein in the step of performing a first cleavage of the substrate product, the protrusion structure is separated into a first part and a second part, the first laser bar includes the first part, the other substrate product includes the second part, wherein in the step of performing a second cleavage of the substrate product, the second part of the protrusion structure is separated into a third part and a fourth part, the second laser bar includes the third part, and still other substrate product includes the fourth part, and wherein in the step of performing a second cleavage of the substrate product, the second laser bar and still other substrate product have been formed between the films, and the pressing causes the first and second laser bars to turn around between the films such that the first part of the first laser bar and the third part of the second laser bar make first contact with each other.