Image sensor including color filter grid including portion overlapping super phase detection (PD) pixel

An image sensor comprising:

• a substrate comprising a first surface and a second surface opposite to the first surface;
• a first pixel region;
• a second pixel region;
• a third pixel region;
• a fourth pixel region;
• a first lens on the first pixel region;
• a second lens on the second and third pixel regions;
• a third lens on the fourth pixel region;
• a first element separation film provided in the substrate and being interposed between the first pixel region the second pixel region;
• a second element separation film provided in the substrate and being interposed between the third pixel region and the fourth pixel region;
• a first color filter configured to transmit light focused by the first lens to the first pixel region;
• a second color filter configured to transmit light focused by the second lens to the second pixel region and the third pixel region;
• a third color filter configured to transmit light focused by the third lens to the fourth pixel region;
• a first color filter grid disposed between the first color filter and the second color filter;
• and
• a second color filter grid disposed between the second color filter and the third color filter,
• wherein a width of the first pixel region and a width of the fourth pixel region in a first direction are between 0.5 um and 0.9 um respectively,
• wherein the first lens is disposed on the second surface, and
• wherein the first direction is parallel to the second surface.