Image sensor including light shielding layer and patterned dielectric layer

An image sensor, comprising:

• a semiconductor substrate comprising sensing pixels arranged in array, each sensing pixel comprising a first sub-pixel, a second sub-pixel and a pair of photo detecting regions;
• first color filters disposed on the semiconductor substrate, each first sub-pixel being respectively covered by one of the first color filters;
• second color filters disposed on the semiconductor substrate, each second sub-pixel being respectively covered by one of the second color filters;
• third color filters disposed on the semiconductor substrate, each pair of photo detecting regions being respectively covered by one of the third color filters;
• first lenses covering the first color filters;
• second lenses covering the second color filters;
• and
• third lenses, each of the third lenses covering one pair of photo detecting regions among the pairs of photo detecting regions, wherein a first coverage of each one first lens among the first lenses or a second coverage of each one second lens among the second lenses is different from a third coverage of each one third lens among the third lenses,
• the grid structure has rounded corners as viewed from a top view, wherein the grid structure comprises:
• a metallic grid layer;
• and
• a dielectric grid layer covering the metallic grid layer, wherein the first color filters are space apart from the second color filters by the grid structure.

An image sensor, comprising:

• a semiconductor substrate having a first side and a second side opposite the first side;
• dielectric materials disposed within trenches defined by interior surfaces of the semiconductor substrate, the trenches extending from the first side toward the second side;
• a plurality of detecting regions provided within the semiconductor substrate;
• a grid structure disposed on the first side of the semiconductor substrate, wherein the grid structure extends away from the trenches, wherein a portion the grid structure is spaced apart from a directly adjacent portion of the grid structure by a first distance, and the portion of the grid structure is spaced apart from another directly adjacent portion of the grid structure by a second distance greater than the first distance;
• and
• a region defined by the portion of the grid structure and the another directly adjacent portion of the grid structure corresponds to two detecting regions among the plurality of detecting regions.