Image Sensor Control Block Layout With Reversed Well Sharing

The patent applies asymmetry by reversing the arrangement of components within adjacent control blocks. Specifically, the second control block is arranged in reverse order compared to the first control block, allowing asymmetric sharing of well regions between adjacent blocks. This asymmetric arrangement eliminates the need for well isolation regions while maintaining functional integrity, thereby improving area efficiency without significantly increasing layout complexity

The patent merges well regions between adjacent control blocks by arranging them in reverse order. The well region in the first control block can be shared with the second control block, and vice versa. This merging of previously separate well regions eliminates the need for isolation regions, directly improving area efficiency while the reverse arrangement pattern keeps the merging systematic and manageable

The asymmetric reverse arrangement of control blocks allows well regions to be shared between adjacent blocks without causing interference. The reversal creates a pattern where well regions that would traditionally need isolation are now positioned to be naturally separated by the reverse arrangement itself, maintaining signal processing reliability while eliminating the need for additional isolation regions and reducing device area

The patent extracts and eliminates the well isolation regions from the conventional design. By removing these isolation regions and implementing reverse arrangement, the design achieves both interference prevention through asymmetric positioning and area reduction, as the isolation regions are completely removed rather than minimized