Patent ID: 7309884
Filing Date: 2007-12-18
Classification: H01L

Abstract:
1. A semiconductor light receiving device, comprising: a semiconductor substrate; a light absorbing layer of a first conductivity type formed on a semiconductor surface region of the semiconductor substrate, the light absorbing layer absorbing a light beam including a first wavelength band and a light beam including a second wavelength band having a shorter wavelength than the wavelength of the first wavelength band; a cap layer of the first conductivity type formed on the light absorbing layer; a region of a second conductivity type formed in the cap layer to transmit the light beam including the first wavelength band; and a light collecting layer formed on the semiconductor surface region adjacently to the cap layer and the light absorbing layer, the light collecting layer having a convex shape with curvature in at least a portion of a surface of the light collecting layer to transmit and collect the light beam including the second wavelength band to the light absorbing layer.