System and method for CMOS image sensing

An imaging capturing device comprising:

• an input port configured to receive a user input, the user input being a command for capturing an image;
• an image sensor being configured to capture an image;
• an optical device being positioned to provide a light to form an image on the image sensor;
• and
• a processor being configured to process images;
• wherein the image sensor comprises:
• an n-type silicon substrate, the n-type semiconductor substrate including a first width;
• a p-type silicon layer overlying the n-type substrate, the p-type silicon layer including a second width;
• an n-type silicon layer overlying the p-type silicon layer, the n-type silicon layer being associated with a third width;
• a pn junction formed between the p-type silicon layer and the n-type silicon layer;
• and
• a silicon germanium layer in the p-type silicon layer, the silicon germanium layer being positioned away from the pn junction.

An imaging capturing device comprising:

• an input port configured to receive a user input, the user input being a command for capturing an image;
• an image sensor being configured to capture an image;
• an optical device being positioned to provide a light to form an image on the image sensor;
• and
• a processor being configured to process images;
• wherein the image sensor comprises:
• a first photodiode having a first p-type region and a first n-type region forming a first pn junction overlying a first n-type substrate;
• a second photodiode having a second p-type region and a second n-type region forming a second pn junction overlying a second n-type substrate;
• a third photodiode having a third p-type region and a third n-type region forming a third pn junction overlying a third n-type substrate;
• a terminal coupled to the first n-type region, the second n-type region, and the third n-type region;
• a first bias voltage coupled to the first n-type substrate;
• a second bias voltage coupled to the second n-type substrate;
• and
• a third bias voltage coupled to the third n-type substrate.