SOLID STATE IMAGE DEVICE, FABRICATING METHOD THEREOF AND TRANSMISSION-TYPE CCD IMAGE SENSOR TO COMPLETELY TRANSMIT SIGNAL CHARGES ACCUMULATED IN PHOTODIODE

摘要

PURPOSE: A solid state image device is provided to completely transmit signal charges accumulated in a photodiode even in a low power supply voltage by including a potential smoothing unit. CONSTITUTION: A plurality of pixel cells are disposed in a semiconductor substrate(14). A driving unit is installed to drive each pixel cell. Each pixel cell includes a photodiode(5), a transmission transistor(6) and a potential smoothing unit. The photodiode converts incident light into signal charges to accumulate the signal charges. The transmission transistor is installed to read out the signal charges accumulated in the photodiode. The potential smoothing unit makes the potential from the photodiode to the transmission transistor vary smoothly.