Optical sensor, signal readout method thereof, solid-state imaging device and its signal readout method

摘要

One of the objects of the present invention is to provide an optical sensor and a solid-state imaging device that greatly contribute to the further development of the industry and the realization of a safer and more secure society, and driving of their signal readout methods. One of the solutions of the present invention is an optical sensor having a light receiving element, a storage capacitor for storing charge, and a transfer switch for transferring the charge generated by light input to the light receiving element to the storage capacitor. The storage capacitors are a floating diffusion capacitor and a lateral overflow storage capacitor, the transfer switch is an LDD / MOS transistor, and the impurity concentration in the drain region is set to a specific concentration.