Patent ID: 8120061
Filing Date: 2012-02-21
Classification: B82Y,H01L,Y02E

Abstract:
1. A light receiving device, comprising: an InP substrate; and a light receiving layer formed by alternately stacking a larger layer formed of GaInNAsSbP mixed crystal having nitrogen content of at most 5% in 5 group, larger lattice constant (a) than that of the InP substrate (a absolute value of lattice mismatch of the larger layer and the smaller layer to the InP substrate is at least 0.5% and at most 5% respectively; at least one of the larger layer and the smaller layer has absorption edge wavelength of 2.0 μm to 3.0 μm; total thickness of the smaller layers and total thickness of the larger layers are each 2.0 μm to 4.0 μm; and average lattice mismatch obtained by multiplying lattice mismatch by thickness and averaging is at most ±0.2%.