| 摘要 |
PURPOSE:To prevent a block where an optical fiber is mounted from slanting and to eliminate a decrease in optical coupling by reflecting laser light projected from above a package horizontally nearly at right angles and soldering and fixing not only top surfaces, but also flanks of a base where a semiconductor element and the block. CONSTITUTION:While the block 10 is held, solder foil 11 is placed straddling on the top surface of the base 30 and the top surface 10A of the block and fused by being irradiated with laser light from above to solder and fix the top surface 10A of the block and the top surface part of the base 30 together. In this case, the fused solder penetrates the gap between the block 10 and base 30 and then this gap part is soldered. Further, solder foil 12 is adhered temporarily straddling on the blank of the base 30 and the flank 10B of the block by using an adhesive, etc. Then, a reflection mirror 15 is placed on the slanting surface of a slanting internal wall 14 and the laser light is projected on the reflection mirror 15 from above the package 14 and reflected horizontally to irradiate the solder foil 12, which is fused to solder and fix the flank 10B of the block and the flank part of the base together.
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