Patent ID: 9214488
Filing Date: 2015-12-15
Classification: H01L

Abstract:
1. A solid state imaging device comprising: a semiconductor substrate comprising a first surface and a second surface opposite the first surface; a circuit at a side of the first surface of the semiconductor substrate; a pixel in the semiconductor substrate and converting light from a side of the second surface into electric charge, the pixel comprising a photo diode in the semiconductor substrate at the side of the first surface, the photo diode comprising a diffusion layer in an impurity region in the semiconductor substrate at the side of the first surface; an element at a side of the second surface of the semiconductor substrate, the element facing the circuit through the semiconductor substrate, the element comprising a resistance element which comprises a diffusion layer in the semiconductor substrate at the side of the second surface or a conductive layer above the second surface, and a pad above the second surface, wherein at least part of the pad and at least part of the element are formed with substantially the same material.