Image sensor with image-capturing pixels and focus detection pixel areas and method for manufacturing image sensor

An image sensor that is to be placed at an imaging plane of an optical system and is equipped with imaging pixels disposed in a two-dimensional array, which converts an image formed through the optical system to an electrical signal, comprising:

• image-capturing pixels that are disposed in the array of the imaging pixels and are used for functions including displaying an image;
• first focus detection pixel areas each formed by disposing in the array of the imaging pixels a plurality of first pixels adopting a split pupil method that are used for focus detection;
• and
• second focus detection pixel areas each formed by disposing in the array of the imaging pixels a plurality of second pixels adopting a split pupil method different from the split pupil method adopted in the first pixels that are used for focus detection, wherein:
• a relationship between a number of the first focus detection pixel areas and a number of the second focus detection pixel areas is determined in correspondence to distances of positions of the first focus detection pixel areas and the second focus detection pixel areas from a center of the image sensor.

A method for manufacturing an image sensor that is to be placed at an imaging plane of an optical system and is equipped with imaging pixels disposed in a two-dimensional array, which converts an image formed through the optical system to an electrical signal, comprising:

• disposing image-capturing pixels in the array of the imaging pixels that are used for functions including displaying an image;
• forming first focus detection pixel areas each by disposing in the array of the imaging pixels a plurality of first pixels adopting a split pupil method that are used for focus detection;
• and
• forming second focus detection pixel areas each by disposing in the array of the imaging pixels a plurality of second pixels adopting a split pupil method different from the split pupil method adopted in the first pixels that are used for focus detection, wherein:
• a relationship between a number of the first focus detection pixel areas and a number of the second focus detection pixel areas is determined in correspondence to directions of positions of the first focus detection pixel areas and the second focus detection pixel areas relative to a center of the image sensor,
• wherein the method for manufacturing is performed through lithography technology.

A method for manufacturing an image sensor that is to be placed at an imaging plane of an optical system and is equipped with imaging pixels disposed in a two-dimensional array, which converts an image formed through the optical system to an electrical signal, comprising:

• disposing image-capturing pixels in the array of the imaging pixels that are used for functions including displaying an image;
• forming first focus detection pixel areas each by disposing in the array of the imaging pixels a plurality of first pixels adopting a split pupil method that are used for focus detection;
• and
• forming second focus detection pixel areas each by disposing in the array of the imaging pixels a plurality of second pixels adopting a split pupil method different from the split pupil method adopted in the first pixels that are used for focus detection, wherein:
• a relationship between a number of the first focus detection pixel areas and a number of the second focus detection pixel areas is determined in correspondence to distances of positions of the first focus detection pixel areas and the second focus detection pixel areas from a center of the image sensor,
• wherein the method for manufacturing is performed through lithography technology.