| 摘要 |
PURPOSE:To obtain the compact optical IC package with high condensing efficiency and satisfactory frequency characteristics by providing a reflection mirror on the counter side of a lens part at the package. CONSTITUTION:The face of the side opposite to a lens part 4 at a package 3 is spherically formed with a photodetector provided in an optical IC 1 and constitutes a reflection mirror 11. A lead frame 2 is equipped with a through hole 12 at a part faced to the photodetector. Namely, parallel beams made incident from the front face of the package 3 excepting for the lens part 4 are reflected by the reflection mirror 11 and condensed through the through hole 12 to the photodetector of the optical IC 1. Therefore, the beams condensed from the front face to the lens part 4 and the beams reflected from the rear face to the reflection mirror are made incident on the photodetector, the condensing efficiency is improved. Further, since the number of the photodetector in the optical IC 1 can be suppressed to one, the frequency characteristics is improved. |
