Patent ID: 7663084
Filing Date: 2010-02-16
Classification: H01L

Abstract:
1. A solid-state imaging device, comprising: a lens having a modulated effective refractive index distribution by including a combination of a plurality of zone areas with a plural-stage concentric structure, the plurality of zone areas being divided, in a whole area of said lens, into line widths which are equal to or shorter than a wavelength of an incident light, and wherein at least one of the plurality of zone areas includes a lower light-transmitting film with a first plural-stage concentric structure and having a first line width and a first film thickness, and an upper light-transmitting film with a second plural-stage concentric structure, configured on said lower light-transmitting film, and having a second line width and a second film thickness, wherein the plural-stage concentric structure includes a plurality of basic patterns each having a different combination of the upper light-transmitting film and the lower light-transmitting film, and wherein a width of one of the plurality of basic patterns located at an outer side of the plural-stage concentric structure is smaller than the wavelength of the incident light.