Patent ID: 8860102

Claim:
A solid-state imaging device having plural photoelectric conversion portions arranged two-dimensionally in a semiconductor substrate, and signal reading circuits formed as MOS transistors in the semiconductor substrate, for reading out signals corresponding to charges generated in the plural respective photoelectric conversion portions, comprising: microlenses formed over the plural respective photoelectric conversion portions, for focusing light beams on the respective photoelectric conversion portions; color filters arranged in mosaic form and disposed between the photoelectric conversion portions and the microlenses corresponding to the photoelectric conversion portions, respectively; an insulating layer which is formed between the semiconductor substrate and the microlenses and in which interconnections are buried; charge storage portions which are formed in the semiconductor substrate and connected to the signal reading circuits, and to which charges stored in the photoelectric conversion portions are transferred; transfer electrodes formed in the insulating layer, for transferring charges from the photoelectric conversion portions to the charge storage portions; and closed-wall-shaped structures disposed in the insulating layer so as to surround parts of optical paths of light beams focused by the microlenses, respectively, wherein: each of the charge storage portions is provided so as to correspond to plural ones, formed under color filters of different colors, of the photoelectric conversion portions; the closed-wall-shaped structures and the transfer electrodes are formed on the semiconductor substrate with a gate insulating film interposed in between; the insulating layer is a stack of a lowest interlayer insulating film in which the closed-wall-shaped structures and the transfer electrodes are formed and plural interlayer insulating films which are formed above the lowest interlayer insulating film and in which interconnections are formed; a width of each of the closed-wall-shaped structures in a direction parallel with a surface of the semiconductor substrate is greater than its height in a direction perpendicular to the semiconductor substrate, and the closed-wall-shaped structures are made of a nonconductive material that is different in refractive index from a material of what is formed around them; and the transfer electrodes are made of a material whose light transmittance varies with the wavelength of incident light and disposed outside walls of the closed-wall-shaped structures, and part of each of the transfer electrodes is in contact with an outer circumferential surface of the associated closed-wall-shaped structure.