Patent ID: 6689667
Filing Date: 2004-02-10
Classification: B82Y,H01L

Abstract:
A method of manufacturing a photoreceiver, comprising the steps of:sequentially forming a p+InGaAsP layer, an iâˆ’InGaAsP/iâˆ’InGaAsP layer of a quantum-well structure, an n+InGaAsP layer, an nâˆ’InGaAs layer, a p+InGaAs layer, an n+InP layer and an n+InGaAs layer, on a semi-insulating InP substrate; defining a photodetector region and a heterojunction bipolar transistor and then removing the n+InGaAs layer, the n+InP layer and the p+InGaAs layer in the photodetector region; removing the nâˆ’InGaAs layer, n+InGaAsP layer and a given region of the iâˆ’InGaAsP/iâˆ’InGaAsP layer of a quantum-well structure in the photodetector region to expose the p+InGaAsP layer, thus defining a waveguide type photodetector; forming an n-electrode on a given region of the nâˆ’InGaAs layer and then forming a p-electrode on a given region of the p+InGaAsP layer to produce a waveguide type photodetector; isolating the photodetector region and the heterogeneous bipolar transistor region, by removing a given region of the p+InGaAs layer from the n+InGaAs layer to expose a given region of the semi-insulating InP substrate; selectively etching the n+InGaAs layer and the n+InP layer in the heterogeneous bipolar transistor region to form an emitter electrode on a mesa shape; forming a base electrode on a given region of the exposed p+InGaAs layer; and selectively removing the nâˆ’InGaAs layer and then forming a collector electrode on a given region of the exposed n+InGaAsP layer, thus producing a heterojunction bipolar transistor.