SOLID-STATE IMAGE PICKUP DEVICE

摘要

PURPOSE: A solid state image pickup device is provided to miniaturize a pixel size by forming a channel part of a charge readout transistor on a surface of a semiconductor substrate at a depth direction. CONSTITUTION: A solid state image pickup device includes a pixel(20) and a semiconductor substrate(2). The pixel is composed of a photo diode(3) and a charge readout transistor. The charge readout transistor reads out a signal charge from the photo diode. The pixel is formed on the semiconductor substrate. A P-N junction part formed between high concentration regions of the photo diode is formed inside the semiconductor substrate. A part of the P-N junction part of the photo diode is formed to be extended to a lower part of a transistor which is formed on a surface of the semiconductor substrate.