CMOS image sensor

A method of manufacturing a complementary metal oxide silicon (CMOS) image sensor, the method comprising comprising:

• providing a photo sensing device for generating photo charges;
• providing a floating diffusion region for storing the photo charges generated by the photo sensing device;
• connecting a transfer transistor between the photo sensing device and the floating diffusion region for transferring the photo charges generated by the photo sensing device to the floating diffusion region;
• connecting a reset transistor between a supply voltage terminal and the floating diffusion region for discharging the charges stored in the floating diffusion region to reset the floating diffusion region;
• providing a drive transistor for acting as a source follower buffer amplifier in response to an output signal from the photo sensing device;
• connecting a switching transistor to the drive transistor for performing an addressing operation;
• and
• connecting a charge control device between the photo sensing device and the transfer transistor for controlling the amount of charges stored in the photo sensing device.