Image sensor and electronic system including the same

An image sensor comprising:

• a pixel group on a substrate, the pixel group comprising a plurality of color unit pixels arranged in a 2×2 matrix;
• and
• a pixel isolation structure configured to isolate a plurality of sub-pixels from each other in each of the plurality of color unit pixels,
• wherein in one color unit pixel selected from the plurality of color unit pixels, the plurality of sub-pixels are arranged in an m×n matrix and comprise pixels of the same color, wherein each of m and n is a natural number of 2 to 10,
• wherein the pixel isolation structure comprises:
• an outer isolation film, when viewed in a plan view, surrounding each color unit pixel of the plurality of color unit pixels;
• at least one inner isolation film comprising a portion between two sub-pixels, which are adjacent to each other from among the plurality of sub-pixels;
• a doped isolation liner covering opposite sidewalls of the at least one inner isolation film;
• and
• at least one doped isolation pillar contacting at least two sub-pixels selected from the plurality of sub-pixels, and
• wherein the at least one doped isolation pillar and the at least one inner isolation film, when viewed in the plan view, are connected to each other to define a size of each of the plurality of sub-pixels.

An electronic system comprising:

• at least one camera module comprising an image sensor;
• and
• a processor configured to process image data received from the at least one camera module,
• wherein the image sensor comprises:
• a color unit pixel comprising a plurality of sub-pixels arranged in an m ×n matrix on a substrate, wherein each of m and n is a natural number of 2 to 10;
• and
• a pixel isolation structure configured to isolate the plurality of sub-pixels from each other in the color unit pixel,
• wherein the pixel isolation structure comprises:
• an outer isolation film, when viewed in a plan view, surrounding the color unit pixel;
• at least one inner isolation film comprising a portion between two sub-pixels, which are adjacent to each other, among the plurality of sub-pixels;
• a doped isolation liner covering opposite sidewalls of the at least one inner isolation film;
• and
• at least one doped isolation pillar contacting at least two sub-pixels selected from the plurality of sub-pixels, and
• wherein the at least one doped isolation pillar and the at least one inner isolation film, when viewed in the plan view, are connected to each other to define a size of each of the plurality of sub-pixels.