Patent ID: 9565381
Date: 2017-02-07
CPC Classifications: H01L,H04N

Claim:
1. A solid-state image sensor comprising one or more pixels, the one or more pixels each including a microlens, a plurality of photoelectric conversion units, and a plurality of waveguides disposed between the microlens and the plurality of photoelectric conversion units so as to correspond to the plurality of photoelectric conversion units, the plurality of waveguides each including a core and a clad, wherein, in at least two of the pixels that are located in a peripheral region of the solid-state image sensor, the microlens is so disposed that a center axis thereof is shifted relative to a center axis of the pixel, the plurality of waveguides includes a first waveguide and a second waveguide, the first waveguide is disposed on a side of the center axis of the pixel that is in a direction opposite to a direction obtained by projecting a shift direction of the microlens onto a straight line connecting a center of the first waveguide and a center of the second waveguide, the second waveguide is disposed on another side of the center axis of the pixel that is in a direction identical to the direction obtained by projecting the shift direction of the microlens onto the straight line, a cross-sectional area of the core in the first waveguide is greater than a cross-sectional area of the core in the second waveguide, and the at least two of the pixels in which the microlenses are disposed such that shift amounts of the microlenses are different from each other are disposed in the peripheral region, wherein the at least two of the pixels include a first pixel and a second pixel, wherein shift amount of the microlens of the first pixel is greater than shift amount of the microlens of the second pixel, and wherein a value representing a ratio of the cross-sectional area of the core in the first waveguide to the cross-sectional area of the core in the second waveguide in the first pixel is greater than a value representing a ratio of the cross-sectional area of the core in the first waveguide to the cross-sectional area of the core in the second waveguide in the second pixel.