Solid imaging device and portable information terminal device

A portable information terminal device comprising:

• a solid imaging device,
• the solid imaging device including:
• an imaging substrate two-dimensionally arranged with a plurality of pixels having a top face formed with an optoelectronic conversion element for converting incident light into an electric charge and storing it and a back face opposite to the top faces, and formed with a top face by the top face of the plurality of pixels and formed with a back face by the back face of the plurality of pixels;
• a light-shielding member provided on the top face side of the imaging substrate;
• and,
• a AD conversion circuits formed on the back face of the pixels shielded from the light,
• the plurality of pixels, when being irradiated with the light from above the light-shielding member, being distinguished into the pixels shielded from the light and the pixels not shielded from the light by the light-shielding member, and
• the electric charges stored by the optoelectronic conversion element of the pixels not shielded from the light being converted into a digital signal by the AD conversion circuits.