IMAGE SENSOR AND AN IMAGE CAPTURING APPARATUS INCLUDING THE IMAGE SENSOR

摘要

An image sensor includes a pixel array. The pixel array includes a plurality of sensing pixels and at least two focusing pixels adjacent to each other. Each of the sensing pixels is configured to output an image signal corresponding to an amount of light incident on the sensing pixels. The at least two focusing pixels are configured to output a focusing signal corresponding to a phase difference between light incident on the at least two focusing pixels. Each of the sensing pixels and the at least two focusing pixels includes a semiconductor layer including a photodetecting device. Each of the sensing pixels includes a light guide which guides incident light toward the photodetecting device, and each of the at least two focusing pixels does not include the light guide.

主权项

1. An image sensor comprising:
a pixel array comprising: a plurality of sensing pixels, each sensing pixel configured to output an image signal corresponding to an amount of light incident on the sensing pixel; and at least two focusing pixels adjacent to each other, the at least two focusing pixels configured to output a focusing signal corresponding to a phase difference between light incident on each of the at least two focusing pixels,
wherein each of the sensing pixels and the at least two focusing pixels comprises:a semiconductor layer including a photodetecting device configured to accumulate electric charges generated according to absorbed light of the incident light;a wiring layer disposed on a first surface of the semiconductor layer, the wiring layer including wirings; anda color filter layer and a microlens layer disposed on a first surface of the wiring layer, wherein the color filter layer selectively transmits the incident light according to a wavelength of the incident light and the microlens layer selectively focuses the incident light onto the photodetecting device,wherein each of the sensing pixels comprises a light guide which guides light incident via the color filter layer and the microlens layer toward the photodetecting device, and each of the focusing pixels does not comprise the light guide.