Backside illumination image sensor, manufacturing method thereof and image-capturing device

An image sensor comprising:

• a first microlens upon which light is incident;
• a second microlens upon which light is incident;
• a first member having a first opening through which light is transmitted from the first microlens;
• a second member having a second opening through which light is transmitted from the second microlens, an opening area of the second opening being smaller than an opening area of the first opening;
• a first photoelectric converter that converts light from the first opening to an electric charge;
• a second photoelectric converter that converts light from the second opening to an electric charge;
• a first charge/voltage converter to which the electric charge from the first photoelectric converter is transferred;
• a second charge/voltage converter to which the electric charge from the second photoelectric converter is transferred;
• a first source follower transistor that is connected to the first charge/voltage converter and outputs a first signal that is based on a potential of the first charge/voltage converter;
• a second source follower transistor that is connected to the second charge/voltage converter and that outputs a second signal that is based on a potential of the second charge/voltage converter;
• a first select portion that outputs the first signal to a first signal line;
• a second select portion that outputs the second signal to a second signal line;
• a first select control line that is connected to the first select portion and to which is output a control signal for controlling the first select portion;
• and
• a second select control line that is connected to the second select portion and to which is output a control signal for controlling the second select portion, wherein:
• the first photoelectric converter is disposed between the first microlens and the second select control line in an optical axis direction of the first microlens;
• and
• the second photoelectric converter is disposed between the second microlens and the first select control line in an optical axis direction of the second microlens.