Solid-state imaging device

A solid-state imaging device having a structure in which a pixel unit having a plurality of pixel cells arranged in a two-dimensional matrix is separately formed on a plurality of semiconductor substrates and the plurality of semiconductor substrates are stacked, wherein each pixel cell has a photoelectric conversion unit that converts an incident light beam into an electric signal and outputs the electric signal, the solid-state imaging device comprising:

• a first semiconductor substrate in which a plurality of photoelectric conversion circuits, which are some circuit elements of the pixel cells including the photoelectric conversion unit, are formed in a two-dimensional matrix;
• a second semiconductor substrate in which a plurality of memory circuits, which are some other circuit elements of the pixel cells, are formed in a two-dimensional matrix, wherein the some other circuit elements of the pixel cells include memory units that correspond to the photoelectric conversion circuits, store electric signals output by the photoelectric conversion units, and output pixel signals according to the electric signals;
• and
• a connection electrode formed between the first semiconductor substrate and the second semiconductor substrate and electrically connected to a signal line of the photoelectric conversion circuits and a signal line of the memory circuits,
• wherein the pixel cells arranged in the pixel unit are divided into a plurality of pixel groups in which the pixel cells are combined so that adjacent pixel cells corresponding to the same wavelength baud are not included if pixel cells corresponding to light beams of the same wavelength band are considered to be arranged on one surface,
• wherein die same connection electrode is shared between the photoelectric conversion circuits and between the memory circuits of the pixel cells included In the same pixel group, and
• wherein signal lines of the photoelectric conversion circuits and signal lines of the memory circuits of the pixel cells included in different pixel groups are connected by different connection electrodes.