Patent ID: 6211509
Filing Date: 2001-04-03
Classification: H01L

Abstract:
A solid-state image sensor comprising:a plurality of pixel units arranged on a semiconductor substrate layer of a first conductivity type in a matrix format, each of said pixel units including a photoelectric conversion portion configured to convert photoelectrically image-sensing light and a signal extraction portion including a field-effect transistor for extracting a signal from said photoelectric conversion portion, said photoelectric conversion portion comprising a photodiode having a p-n junction formed between the substrate layer and a first diffusion layer that has a second conductivity type and is formed in the substrate layer;a scanning circuit connected to the signal extraction portions and configured to read and transfer sequentially the signals obtained by the photoelectric portions of said plurality of pixel units, said scanning circuit including a plurality of signal wiring lines to transfer the signals from said pixel units; andelement isolation regions configured to isolate said pixel units from each other, each pixel element isolation region having a bottom portion positioned deeper than a bottom portion of said first diffusion layer.