| 摘要 |
PURPOSE:To provide an optical receiver excellent in external noise resistance by forming a substrate of a photodiode with a material having the same conductivity type as that of a substrate of a reception IC. CONSTITUTION:A reception IC 3 and a PD(photodiode) 6a air mounted on a lead frame 4 in close vicinity to each other, and an output pad 8 of the PD 6a and an input pad 9 of the reception IC 3 are connected through a wire 2, and further the entire is molded with a resin package. The PD Ga and the reception wire IC 3 are disposed in close vicinity to each other whereby the length of the wire 2, i.e., a wiring connected with an input of the reception IC is shortened to prevent any noise from being received. Further, a substrate 12 of the PD 6a is formed with the same conductivity type, a P type, as that of a substrate 11 of the reception IC 3. For the PD 6a an N layer 13 is provided on a P type substrate 12, and the P type substrate 12 is taken as an anode and the N layer 13 is taken as a cathode. A PN junction 14 has an optical detection function of producing a current when light is incident there. |
