Patent ID: 6617568
Filing Date: 2003-09-09
Classification: H01L,Y02E

Abstract:
A photo detector, comprising:a semiconductor substrate having a first principal face and a second principal face; a photo detection area formed on the first principal face of the semiconductor substrate; a negative electrode electrically connected with the photo detection area; a positive electrode; a beveled face formed on at least one edge portion of the first principal face of the semiconductor substrate; a reflector formed on the second principal face of the semiconductor substrate, a light absorbing layer on the first principal face of the semiconductor substrate; a window layer having a diffusion area on the light absorbing layer; and a contact hole which reaches the first principal face of the semiconductor substrate through the window layer and through the light absorbing layer; wherein incident light from outside of the semiconductor substrate, enters the semiconductor substrate at a side face of the photo detector while being refracted at the beveled face, and thereafter is reflected from the reflector so as to reach the photo detection area.