Patent ID: 8071415
Filing Date: 2011-12-06
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device having a plurality of light receiving elements, and having an amplifying element that amplifies an output signal from the light receiving elements, mounted on a semiconductor substrate, the method comprising: a) an active region forming process that forms an active region on the semiconductor substrate for configuring the amplifying element; b) after the active region forming process, performing a light receiving element region forming process that forms a light receiving element region on the semiconductor substrate for forming the plurality of light receiving elements, with the active region acting as a reference for positioning; c) after the light receiving element region forming process, performing an impurity implantation process that implants an impurity into the light receiving element region; d) repeating the light receiving element region forming process b) and repeating the impurity implantation process c) a number of times that equals a number of diffusion layers in the light receiving element region; e) after the impurity implantation process, performing a drive-in process to carry out drive in of the semiconductor substrate; and f) after the drive-in process, performing an amplifying element forming process that implants an impurity in the active region and forms the amplifying element; wherein when the number of diffusion layers is two, the impurity implanted at process c), and the impurity implanted at process d) when the process c) is repeated the second time, are impurities showing opposite conductivities to each other.