Image sensing device

An image sensing device comprising:

• an effective pixel region including a plurality of effective pixels configured to detect incident light and to generate actual image data from the detected incident light;
• a dummy pixel region located outside the effective pixel region and including a plurality of dummy pixels configured to perform one or more functions other than generating the actual image data or perform no function;
• a plurality of color filters located in correspondence to the effective pixels and the dummy pixels to filter the incident light;
• and
• a grid structure disposed between adjacent color filters of the plurality of color filters in each of the effective pixel region and the dummy pixel region,
• wherein the grid structure includes:
• an air layer;
• a first capping layer at least partially covering the air layer and including a plurality of first holes;
• and
• a second capping layer configured to fill the first holes in the effective pixel region.